Signal transmission method, terminal equipment and network equipment

Abstract

The present invention provides a signal transmission method, terminal equipment and network equipment, which relate to the field of communication technology, wherein the method comprises: sending an uplink signal to a network device; receiving a first optical signal generated by a visible light wireless communication LiFi device based on a downlink signal corresponding to the uplink signal sent by the network device, and converting the first optical signal into a downlink signal. That is, uplink and downlink use different ways to transmit signals, so that uplink and downlink interference can be reduced and signal transmission performance can be improved.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a signal transmission method, terminal equipment and network equipment. Background Art

[0002] With the development of computer technology, the functions of terminal equipment are becoming more and more powerful, and communication function is an important function of terminal equipment.

[0003] At present, the communication methods commonly used by terminal devices include 2G (second-generation mobile communication technology) / 3G (third-generation mobile communication technology) / 4G (fourth-generation mobile communication technology) / 5G (fifth-generation mobile communication technology) / WiFi (WIreless Fidelity) and the like. During the communication process, the terminal device can upload signals to the network device through any of the above-mentioned communication methods, such as the 5G communication method. During the downlink transmission process, the terminal device receives the signal sent by the network device through the same 5G communication method, that is, the uplink data and the downlink data can be transmitted through any of the same communication methods among the above-mentioned communication methods. However, due to the limitations of the wireless spectrum bandwidth of communication methods such as 2G / 3G / 4G / 5G / WiFi, the downlink transmission rate is easily reduced. Summary of the invention

[0004] The embodiments of the present invention provide a signal transmission method, a terminal device and a network device to solve the problem of low downlink transmission rate in the prior art.

[0005] To solve the above technical problems, the present invention is achieved as follows:

[0006] In a first aspect, an embodiment of the present invention provides a signal transmission method for a terminal device, the signal transmission method comprising:

[0007] Sending uplink signals to network devices;

[0008] A first optical signal generated by a downlink signal corresponding to the uplink signal sent by the network device and sent by a visible light wireless communication LiFi device is received, and the first optical signal is converted into a downlink signal.

[0009] In a second aspect, an embodiment of the present invention provides another signal transmission method for a network device, the signal transmission method comprising:

[0010] Receive uplink signals sent by terminal equipment;

[0011] Receiving a downlink signal corresponding to the uplink signal sent by a server;

[0012] The downlink signal is sent to the LiFi device, where the downlink signal is used by the LiFi device to send a first optical signal to the terminal device based on the uplink signal, where the first optical signal is used by the terminal device to convert the first optical signal into the downlink signal.

[0013] In a third aspect, an embodiment of the present invention provides a terminal device, including:

[0014] A first sending module, used for sending an uplink signal to a network device;

[0015] The first receiving module is used to receive a first optical signal generated by a visible light wireless communication LiFi device based on a downlink signal corresponding to the uplink signal sent by the network device, and convert the first optical signal into a downlink signal.

[0016] In a fourth aspect, an embodiment of the present invention provides a network device, including:

[0017] A second receiving module, used to receive an uplink signal sent by a terminal device;

[0018] A third receiving module, used to receive a downlink signal corresponding to the uplink signal sent by the server;

[0019] The second sending module is used to send the downlink signal to the LiFi device, and the downlink signal is used by the LiFi device to send the first optical signal to the terminal device based on the uplink signal, and the first optical signal is used by the terminal device to convert the first optical signal into the downlink signal.

[0020] In a fifth aspect, an embodiment of the present invention provides a terminal device, including a transceiver,

[0021] The transceiver is used to send an uplink signal to the network device;

[0022] The transceiver is used to receive a first optical signal generated by a visible light wireless communication LiFi device based on a downlink signal corresponding to the uplink signal sent by the network device, and convert the first optical signal into a downlink signal.

[0023] In a sixth aspect, an embodiment of the present invention provides a network device, including a transceiver,

[0024] The transceiver is used to receive an uplink signal sent by a terminal device;

[0025] The transceiver is used to receive a downlink signal corresponding to the uplink signal sent by the server;

[0026] The transceiver is used to send the downlink signal to the LiFi device, and the downlink signal is used by the LiFi device to send a first optical signal to the terminal device based on the uplink signal, and the first optical signal is used by the terminal device to convert the first optical signal into the downlink signal.

[0027] In the seventh aspect, an embodiment of the present invention provides a terminal device, comprising: a processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the signal transmission method described in the first aspect above.

[0028] In an eighth aspect, an embodiment of the present invention provides a network device, comprising: a processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the signal transmission method described in the second aspect above.

[0029] In the ninth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the signal transmission method described in the first aspect are implemented; or when the computer program is executed by a processor, the steps of the signal transmission method described in the second aspect are implemented.

[0030] In the uplink process, the terminal device sends an uplink signal to the network device, and in the downlink process, the downlink signal is transmitted through the LiFi device, that is, the LiFi device receives the downlink signal sent by the network device and converts it into a first optical signal for transmission, and the terminal device receives the first optical signal transmitted by the LiFi device and then converts it into a downlink signal to obtain the downlink signal. That is, the uplink and downlink use different ways to transmit signals, so that the uplink and downlink interference can be reduced and the signal transmission performance can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0032] Figure 1 is a flow chart of a signal transmission method provided by an embodiment of the present invention;

[0033] Figure 2 is a flow chart of another signal transmission method provided by an embodiment of the present invention;

[0034] Figure 3It is an architecture diagram of an active indoor communication system provided by an embodiment of the present invention;

[0035] Figure 4 It is an architecture diagram of a passive indoor communication system provided by an embodiment of the present invention;

[0036] Figure 5 This is one of the 5G+Lifi signal transmission system architecture diagrams provided in an embodiment of the present invention;

[0037] Figure 6 This is a data flow schematic diagram of a 5G+Lifi signal transmission system architecture provided by an embodiment of the present invention;

[0038] Figure 7 It is one of the data flow principle diagrams of a 5G+Lifi active signal transmission system architecture diagram provided in an embodiment of the present invention;

[0039] Figure 8 This is the second data flow principle diagram of a 5G+Lifi active signal transmission system architecture diagram provided by an embodiment of the present invention;

[0040] Fig. 9 It is a data flow principle diagram of a 5G+Lifi passive signal transmission system architecture diagram provided by an embodiment of the present invention;

[0041] Fig.10 This is the second architecture diagram of a 5G+Lifi signal transmission system provided in an embodiment of the present invention;

[0042] Fig.11 This is the third diagram of a 5G+Lifi signal transmission system architecture provided by an embodiment of the present invention;

[0043] Fig.12 is a schematic diagram of the structure of a terminal device provided by an embodiment of the present invention;

[0044] Fig.13 It is a structural diagram of a network device provided by an embodiment of the present invention;

[0045] Fig.14 is a schematic diagram of the structure of a terminal device provided by an embodiment of the present invention;

[0046] Fig.15 It is a structural diagram of a network device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] See also Figure 1 , Figure 1 is a flow chart of a signal transmission method provided by an embodiment of the present invention, which is used in a terminal device, such as Figure 1 As shown, the method comprises the following steps:

[0049] Step 101: Send an uplink signal to a network device.

[0050] The uplink signal can also be understood as uplink data. The terminal device accesses the network and establishes a connection with the network device. The terminal device can send an uplink signal to the network device. After receiving the uplink signal, the network device can send the uplink signal to the server, etc. As an example, the terminal device can use any communication method such as 2G / 3G / 4G / 5G / WiFi to send an uplink signal to the network device. For example, the network device can be a 5G communication device, and the terminal device can use the 5G communication method to send an uplink signal to the network device.

[0051] Step 102: Receive a first optical signal generated by a downlink signal corresponding to an uplink signal sent by a visible light wireless communication LiFi device, and convert the first optical signal into a downlink signal.

[0052] LiFi, or Light Fidelity, can be called visible light wireless communication. After receiving the uplink signal, the network device can return the downlink signal to the terminal device. During the return process, the network device sends the downlink signal to the LiFi device. LiFi generates a first optical signal based on the downlink signal and then transmits it. The terminal device receives the first optical signal and converts it into a downlink signal. In this way, the terminal device obtains the downlink signal. It should be noted that after receiving the uplink signal, the network device sends it to the server. After receiving the uplink signal, the server can send the downlink signal corresponding to the uplink signal to the network device. The network device can send the downlink signal to the LiFi device. The LiFi device can generate and transmit the first optical signal based on the downlink signal. The terminal device receives the transmitted first optical signal and converts it into a downlink signal.

[0053] In the signal transmission method of this embodiment, in the uplink process, the terminal device sends an uplink signal to the network device, and in the downlink process, the downlink signal is transmitted through the LiFi device, that is, the LiFi device receives the downlink signal sent by the network device and converts it into a first optical signal for transmission, and the terminal device receives the first optical signal transmitted by the LiFi device and then converts it into a downlink signal to obtain the downlink signal. That is, the uplink and downlink use different ways to transmit signals, so that the uplink and downlink interference can be reduced and the signal transmission performance can be improved.

[0054] In one embodiment, the network device is a mobile communication active communication device;

[0055] Sending uplink signals to network devices, including:

[0056] Sending an uplink signal to a radio remote unit in a mobile communication active communication device;

[0057] Receiving a first optical signal generated by a downlink signal corresponding to an uplink signal sent by a network device and sent by a visible light wireless communication LiFi device, comprising:

[0058] A first optical signal generated based on a first electrical signal sent by a hub or a radio frequency remote unit in a mobile communication active communication device and sent by a signal lamp in a LiFi device is received, wherein the first electrical signal is a signal generated by a first baseband unit in the active communication device based on a downlink signal.

[0059] It can be understood that the mobile communication active communication device includes a radio frequency remote unit (pRRU), a hub (Hub) and a first baseband unit (i.e., a first baseband processing unit, which may also be referred to as a first BBU or a first indoor baseband processing unit) connected in sequence, the first baseband unit is also connected to the core network, the first baseband unit is connected between the core network and the hub, the hub is connected between the hub and the radio frequency remote unit, and the radio frequency remote unit may also be connected to the terminal device. As an example, the mobile communication active communication device may be a 5G mobile communication active communication device.

[0060] In the process of the terminal device sending an uplink signal to the network device, the terminal device can send an uplink signal to the RF remote unit of the mobile communication active communication device to achieve the sending of the uplink signal to the mobile communication active communication device terminal. In the process of the mobile communication active communication device terminal sending a downlink signal, the first baseband unit in the mobile communication active communication device now generates a first electrical signal based on the downlink signal and transmits it to the hub. The hub can then transmit the first electrical signal to the RF remote unit, and the first electrical signal is sent to the LiFi device through the hub or the RF remote unit. After receiving the first electrical signal sent by the hub or the RF remote unit, the LiFi device can generate a first optical signal based on the first electrical signal and transmit it. After receiving the first optical signal, the terminal device converts the first optical signal into a downlink signal.

[0061] In one embodiment, the network device is a mobile communication passive communication device;

[0062] Sending uplink signals to network devices, including:

[0063] Sending an uplink signal to a distributed antenna unit in a mobile communication passive communication device;

[0064] Receiving a first optical signal generated by a downlink signal corresponding to an uplink signal sent by a network device and sent by a visible light wireless communication LiFi device, comprising:

[0065] A first optical signal generated based on a first electrical signal and sent by a signal light in a LiFi device is received, wherein the first electrical signal is a signal obtained by down-converting and analog-to-digital converting the first frequency-converted signal sent by the distributed antenna unit, and the first frequency-converted signal is a signal obtained by performing digital-to-analog conversion and up-converting on the first electrical signal obtained by converting the downlink signal by the second baseband unit in the mobile communication passive communication device.

[0066] It can be understood that the mobile communication passive communication device may include a second baseband unit (i.e., a second baseband processing unit, which may also be referred to as a second BBU or a second indoor baseband processing unit), a radio frequency unit (RRU), and a distributed antenna unit (DAS) connected in sequence, the radio frequency unit being connected between the second baseband unit and the distributed antenna unit, the second baseband unit being also connected to the core network, the second baseband unit being connected between the core network and the radio frequency unit, and the distributed antenna unit being also connected to the terminal device. As an example, the mobile communication passive communication device may be a 5G mobile communication passive communication device.

[0067] In the process of the terminal device sending an uplink signal to the network device, the terminal device can send an uplink signal to the distributed antenna unit of the mobile communication passive communication device terminal to achieve the sending of the uplink signal to the mobile communication passive communication device terminal. In the process of the mobile communication passive communication device terminal sending a downlink signal, the second baseband unit in the mobile communication passive communication device terminal converts the downlink signal to obtain a first electrical signal, performs digital-to-analog conversion and up-conversion processing on the first electrical signal to obtain a first frequency-converted signal, and transmits the first frequency-converted signal to the distributed antenna unit. The distributed antenna unit performs down-conversion processing and analog-to-digital conversion processing on the first frequency-converted signal to obtain a first electrical signal, and sends the first electrical signal to the LiFi device. After receiving the sent first electrical signal, the LiFi device generates a first optical signal and transmits it. After receiving the first optical signal, the terminal device converts the first optical signal into a downlink signal.

[0068] In one embodiment, the downlink signal is a signal of the first user;

[0069] Receiving a first optical signal generated by a visible light wireless communication LiFi device based on a first electrical signal sent by a network device, comprising:

[0070] A first optical signal carried on a first target spectral frequency band and sent by a LiFi device is received, where the first target spectral frequency band corresponds to a first user.

[0071] That is, for downlink signals of different users, the LiFi device can use different spectral frequency bands to transmit optical signals to distinguish the signals of different users. In this embodiment, if the downlink signal is a signal of the first user, the LiFi device uses the first target spectral frequency band corresponding to the first user to transmit the first electrical signal. In this way, for multiple different users, optical signals can be transmitted using different frequency bands to achieve frequency division transmission of optical signals.

[0072] That is, the signals of different users are carried on different spectral bands, and the signals of several users are sent. The relationship between spectral bands and wavelengths is shown in Table 1. For example, the signal of user 1 is carried on the designated frequency point A or frequency band A1 in the red light frequency band range, the signal of user 2 is carried on the designated frequency point B or frequency band B1 in the orange light frequency band range, ..., the data of user 7 is carried on the designated frequency point G or frequency band G1 in the purple light frequency band range, and the data of user 8 is carried on the designated frequency point H or frequency band H1 in the red light frequency band range, etc.

[0073] Table 1

[0074] color wavelength frequency red About 625~740nm About 480~405THz orange About 590~625nm About 510~480THz yellow About 565~590nm About 530~510THz green About 500~565nm About 600~530THz green About 485~500nm About 620~600THz blue About 440~485nm About 680~620THz purple About 380~440nm About 790~680THz

[0075] As an example, if the downlink signals of multiple users need to be transmitted through LiFi devices, the LiFi devices will transmit optical signals in sequence according to the order of the initiation time of the downlink signals to achieve time-division transmission of optical signals. The optical transmission rate is relatively high, so the impact of user time-division transmission on the user's service delay is not obvious. This can be achieved by adding a microchip to a signal light, such as an LED bulb, to control millions of flashes per second. Since the frequency is too fast, the human eye cannot detect it, and the rate is relatively high. In this way, the frequency division and time division schemes can be combined. When multiple users send signals, the user's signals are carried by frequency respectively, and are sent sequentially in the time domain, thereby improving the efficiency of user data transmission.

[0076] See also Figure 2 , Figure 2 is a flow chart of a signal transmission method provided by an embodiment of the present invention, which is used in a network device, such as Figure 2 As shown, the method comprises the following steps:

[0077] Step 201: receiving an uplink signal sent by a terminal device;

[0078] Step 202: Receive a downlink signal corresponding to the uplink signal sent by the server;

[0079] Step 203: Send a downlink signal to the LiFi device, where the downlink signal is used by the LiFi device to send a first optical signal to the terminal device based on the uplink signal, where the first optical signal is used by the terminal device to convert the first optical signal into a downlink signal.

[0080] That is, after receiving the uplink signal, the network device can return a downlink signal to the terminal device. During the return process, the network device sends the downlink signal to the LiFi device, and LiFi generates a first optical signal based on the downlink signal and then transmits it. The terminal device receives the first optical signal and converts it into a downlink signal. In this way, the terminal device obtains the downlink signal. It should be noted that after receiving the uplink signal, the network device sends it to the server. After receiving the uplink signal, the server can send the downlink signal corresponding to the uplink signal to the network device. The network device can send the downlink signal to the LiFi device. The LiFi device can generate and transmit the first optical signal based on the downlink signal. The terminal device receives the transmitted first optical signal and converts it into a downlink signal.

[0081] In the signal transmission method of this embodiment, during the uplink process, the terminal device sends an uplink signal to the network device, and the network device receives the uplink signal sent by the terminal device. During the downlink process, the network device receives the downlink signal sent by the server and sends the downlink signal to the LiFi device. The downlink signal is transmitted through the LiFi device, that is, the LiFi device receives the downlink signal sent by the network device and converts it into a first optical signal for transmission. The terminal device receives the first optical signal transmitted by the LiFi device and then converts it into a downlink signal to obtain the downlink signal. That is, the uplink and downlink use different ways to transmit signals, so that the uplink and downlink interference can be reduced and the signal transmission performance can be improved.

[0082] In one embodiment, the network device is a mobile communication active communication device, the mobile communication active communication device includes a first baseband unit, a hub and a radio remote unit, the hub is connected between the radio remote unit and the first baseband unit, the terminal device is connected to the radio remote unit, and the first baseband unit is connected to the server through a core network;

[0083] Receive uplink signals sent by terminal equipment, including:

[0084] Receiving an uplink signal sent by a terminal device through a radio remote unit;

[0085] After receiving the uplink signal sent by the terminal device through the radio remote unit, the method further includes:

[0086] The uplink signal is sent to the server through the hub, the first baseband unit and the core network.

[0087] In one embodiment, receiving a downlink signal sent by a server includes:

[0088] Receiving a downlink signal sent by the server through the first baseband unit;

[0089] Send downlink signals to LiFi devices, including:

[0090] Converting the downlink signal by a first baseband unit to obtain a first electrical signal;

[0091] The first electrical signal is transmitted to the hub through the first baseband unit, and the first electrical signal is sent to the LiFi device through the hub; or,

[0092] Transmitting the first electrical signal to the hub through the first baseband unit, transmitting the first electrical signal to the radio remote unit through the hub, and sending the first electrical signal to the LiFi device through the radio remote unit;

[0093] The first electrical signal is used by the LiFi device to generate a first optical signal based on the first electrical signal.

[0094] In one embodiment, the network device is a mobile communication passive communication device, the mobile communication passive communication device includes a second baseband unit, a radio frequency unit and a distributed antenna unit connected in sequence, the terminal device is connected to the distributed antenna unit, and the second baseband unit is connected to the server through the core network;

[0095] Receive uplink signals sent by terminal equipment, including:

[0096] Receiving an uplink signal sent by a terminal device through a distributed antenna unit;

[0097] After receiving the uplink signal sent by the terminal device through the distributed antenna unit, it also includes:

[0098] The uplink signal is sent to the server through the radio frequency unit, the second baseband unit and the core network.

[0099] That is, the distributed antenna unit can first transmit the uplink signal to the radio frequency unit, the radio frequency unit transmits the uplink signal to the second baseband unit, and the second baseband unit sends the uplink signal to the server through the core network, thereby realizing the uplink process from the terminal device to the server.

[0100] In one embodiment, receiving a downlink signal sent by a server includes:

[0101] Receiving a downlink signal sent by the server through the second baseband unit;

[0102] Send downlink signals to LiFi devices, including:

[0103] Converting the downlink signal by the second baseband unit to obtain a first electrical signal;

[0104] Performing digital-to-analog conversion on the first electrical signal to obtain a first analog signal;

[0105] Performing up-conversion processing on the first analog signal to obtain a first frequency-converted signal;

[0106] Performing down-conversion processing and analog-to-digital conversion processing on the first frequency conversion signal through the distributed antenna unit to obtain a first electrical signal, and sending the first electrical signal to the LiFi device;

[0107] The first electrical signal is used by the LiFi device to generate a first optical signal based on the first electrical signal.

[0108] That is, after the distributed antenna unit receives the first frequency conversion signal sent by the second baseband unit, it can down-convert the first frequency conversion signal to obtain a first analog signal, and perform analog-to-digital conversion on the first analog signal to obtain a first electrical signal, and send the first electrical signal to the LiFi device. After the LiFi device receives the first electrical signal, it can generate a first optical signal based on the first electrical signal and transmit it.

[0109] In one embodiment, the first baseband unit includes a first NR main control unit and a first NR baseband unit connected to each other, and the first NR baseband unit integrates the new radio NR baseband processing capability and the LiFi baseband processing capability; or

[0110] The first baseband unit includes a first NR main control unit, a first NR baseband unit and a first LiFi baseband unit, and the first NR main control unit is connected to the first NR baseband unit and the first LiFi baseband unit respectively;

[0111] Among them, the first NR main control unit is also connected to the server through the core network.

[0112] NR stands for New Radio, which can be called new wireless or new air interface. That is, in this embodiment, for active network equipment, Lifi baseband processing capability can be introduced, and a Lifi baseband processing unit can be added to the first NR baseband unit. The Lifi baseband processing unit can be integrated in the first NR baseband unit, that is, the first NR baseband unit not only has NR baseband processing capability, but also has LiFi baseband processing capability. Alternatively, the Lifi processing unit can be an independent processing unit, that is, the first LiFi baseband unit, which is independent of the first NR baseband unit, and the first NR baseband unit and the first LiFi baseband unit are respectively connected to the first NR main control unit.

[0113] It should be noted that, in the case where the new radio NR baseband processing capability and the LiFi baseband processing capability are integrated in the first NR baseband unit, the uplink signal uploaded by the terminal device can be processed and transmitted to the first NR main control unit through the NR baseband processing capability in the first NR baseband unit, and the signal is transmitted to 5GC through the first NR main control unit, and then uploaded to the server through 5GC. Moreover, for the downlink signal sent by the server, the first NR main control unit can transmit the downlink signal to the first NR baseband unit. Since the first NR baseband unit also integrates the LiFi baseband processing capability, the first NR baseband unit converts the downlink signal to obtain a first electrical signal, transmits it to the hub, and transmits the first electrical signal to the LiFi device through the hub, or the hub can transmit the first electrical signal to the radio frequency remote unit, and send it to the LiFi device through the radio frequency remote unit.

[0114] In the case where the first baseband unit includes a first NR main control unit, a first NR baseband unit and a first LiFi baseband unit, and the first NR main control unit is connected to the first NR baseband unit and the first LiFi baseband unit respectively, the uplink signal uploaded by the terminal device can be processed by the first NR baseband unit and then transmitted to the first NR main control unit, and the signal is transmitted to 5GC by the first NR main control unit, and then uploaded to the server by 5GC. For the downlink signal sent by the server, the first NR main control unit can transmit the downlink signal to the first LiFi baseband unit, and the first LiFi baseband unit converts the downlink signal to obtain a first electrical signal, transmits it to the hub, and transmits the first electrical signal to the LiFi device through the hub, or the hub can transmit the first electrical signal to the radio frequency remote unit, and send it to the LiFi device through the radio frequency remote unit.

[0115] In one embodiment, the second baseband unit includes a second NR main control unit and a second NR baseband unit connected to each other, and the second NR baseband unit integrates new air interface NR baseband processing capability and LiFi baseband processing capability; or,

[0116] The second baseband unit includes a second NR main control unit, a second NR baseband unit and a second LiFi baseband unit, and the second NR main control unit is connected to the second NR baseband unit and the second LiFi baseband unit respectively;

[0117] Among them, the second NR main control unit is also connected to the server through the core network.

[0118] That is, in this embodiment, for passive network equipment, Lifi baseband processing capabilities can be introduced, and a Lifi baseband processing unit can be added to the second NR baseband unit. The Lifi baseband processing unit can be integrated in the second NR baseband unit, that is, the second NR baseband unit not only has NR baseband processing capabilities, but also has LiFi baseband processing capabilities. Alternatively, the Lifi processing unit can be an independent processing unit, that is, a second LiFi baseband unit, which is independent of the second NR baseband unit, and the second NR baseband unit and the second LiFi baseband unit are respectively connected to the second NR main control unit.

[0119] It should be noted that, in the case where the new air interface NR baseband processing capability and the LiFi baseband processing capability are integrated in the second NR baseband unit, the uplink signal uploaded by the terminal device can be processed and transmitted to the second NR main control unit through the NR baseband processing capability in the second NR baseband unit, and the signal is transmitted to 5GC through the second NR main control unit, and uploaded to the server through 5GC. Moreover, for the downlink signal sent by the server, the second NR main control unit can transmit the downlink signal to the second NR baseband unit. Since the second NR baseband unit also integrates the LiFi baseband processing capability, the second NR baseband unit can perform digital-to-analog conversion and up-conversion processing on the downlink signal to obtain a first frequency conversion signal, and transmit it to the distributed antenna unit. The distributed antenna unit can perform down-conversion processing and analog-to-digital conversion on the first frequency conversion signal to obtain a first electrical signal, and transmit it to the LiFi device. The LiFi device can generate a first optical signal based on the first electrical signal and transmit it.

[0120] In the case where the second baseband unit includes a second NR main control unit, a second NR baseband unit, and a second LiFi baseband unit, and the second NR main control unit is connected to the second NR baseband unit and the second LiFi baseband unit respectively, the uplink signal uploaded by the terminal device can be processed by the second NR baseband unit and then transmitted to the second NR main control unit, and the signal can be transmitted to 5GC by the second NR main control unit, and then uploaded to the server through 5GC. For the downlink signal sent by the server, the second NR main control unit can transmit the downlink signal to the second LiFi baseband unit, and the second LiFi baseband unit can perform digital-to-analog conversion and up-conversion processing on the downlink signal to obtain a first frequency conversion signal, and transmit it to the distributed antenna unit, and the distributed antenna unit can perform down-conversion processing and analog-to-digital conversion on the first frequency conversion signal to obtain a first electrical signal, and transmit it to the LiFi device, and the LiFi device can generate a first optical signal based on the first electrical signal and transmit it.

[0121] The process of the above signal transmission method is described below with reference to a specific embodiment.

[0122] At present, indoor wireless communication can be achieved by using 2G / 3G / 4G / 5G indoor distributed communication systems, outdoor 2G / 3G / 4G / 5G communication systems covering indoor areas, WIFI digital communication, wired networks, etc. At the same time, wireless communication using visible light (called LiFi--Light Fidelity) has not yet been applied. Visible light communication uses fast light pulses to transmit information wirelessly. In other words, you can surf the Internet by turning on an LED light without a WiFi signal. The principle is to encode information in light at different rates, for example, LED on means 1, off means 0, and information can be transmitted by fast switching. By adding a microchip to an ordinary LED bulb and making it flash at an extremely fast speed, data can be sent using the bulb.

[0123] Information is encoded using the brightness of light. The light source uses a new era of high-brightness light-emitting diodes (LEDs). When the LED is on, it means 1, and when it is off, it means 0. By adding a microchip to the LED bulb, it can be controlled to flash millions of times per second. Because the frequency is too fast, the human eye will not notice it at all, but the photosensitive sensor can receive these changes. In this way, binary data is quickly encoded into light signals and effectively transmitted.

[0124] Indoor communication systems are divided into active indoor communication systems and passive indoor communication systems. Take 5G as an example. Figure 3 As shown in FIG. 1 , it is an architecture diagram of an active indoor communication system. Figure 4 As shown, this is the architecture diagram of the passive indoor communication system.

[0125] Visible light communication has abundant spectrum resources. Currently, wireless spectrum resources are tight. Communication networks such as 2G / 3G / 4G / 5G and wifi occupy many frequency bands. The wavelength of visible light band is between 780nm and 375nm. The visible light band is a blank spectrum and can be used without authorization. Indoor environment, it has the advantages of low cost, high density, high confidentiality, harmless to human body, no electromagnetic radiation, high-speed communication, and almost zero energy consumption. It is a good substitute for conventional wireless local area networks and can cover 80% of human activity areas. A single communication method cannot cope with the scene differences of future communication networks, and it is necessary to integrate various wireless communication methods.

[0126] When the terminal device is in a single usage scenario (for example, a public network scenario), the fixed UE capability can be reported at the time of initial access, but when the terminal device is in a different business scenario conversion, or in a certain scenario. Current radio signal transmission equipment has many limitations. They are rare, expensive, but inefficient. For example, mobile phones have millions of base stations around the world to help them enhance signals, but most of the energy is consumed in cooling, with an efficiency of only 5%. In contrast, LEDs have the advantages of being green, energy-saving, environmentally friendly, and having a long life. In particular, LED light sources are replacing traditional incandescent lamps on a large scale in China. As long as a microchip is added to an LED bulb, the bulb can be turned into a wireless network transmitter. WiFi relies on invisible radio wave transmission. As the power of the equipment increases, local electromagnetic radiation is bound to increase; wireless signals pass through walls, and network information is not secure. These security risks can be avoided in visible light communication. Moreover, the spectrum is larger than the radio spectrum, which means greater bandwidth and higher speed, and network settings require almost no new infrastructure.

[0127] The signal transmission system architecture of 5G+Lifi provided in this application embodiment is shown in Figure 5 , realize signal transmission, control and data plane process see Figure 6, the dotted line is the control plane, the thin solid line is the uplink data plane, and the thick solid line is the downlink data plane.

[0128] For the combination of Lifi and 5G active indoor distribution, that is, Lifi equipment and 5G active network equipment (that is, 5G mobile communication active communication equipment) are combined for signal transmission. Figure 7 and 8 As shown in the figure, the terminal equipment UE accesses the 5G+Lifi signal transmission system (5G+Lifi indoor distributed system). The control plane is still transmitted by 5G, the downlink part of the data plane is transmitted by Lifi, and the uplink part of the data plane is transmitted by 5G. Figure 7 and 8 The middle dashed line is the control plane, the thin solid line is the data plane uplink, and the thick solid line is the data plane downlink. For 5G active network equipment, during the data downlink transmission process, such as Figure 7 As shown, the first BBU in the active network device can send a first electrical signal to the hub, and the hub sends the first electrical signal to the LiFi device. The LiFi device generates a first optical signal based on the first electrical signal, and transmits the first optical signal through the signal light in the LiFi device. After the terminal device UE receives the first optical signal, it converts it into a downlink signal to obtain the downlink signal. In addition, for 5G active network devices, during the downlink data transmission process, such as Figure 8 As shown, the first BBU in the active network device can send a first electrical signal to the hub, the hub can send the first signal to the radio remote unit, the radio remote unit sends the first electrical signal to the LiFi device, the LiFi device generates a first optical signal based on the first electrical signal, and transmits the first optical signal through the signal light in the LiFi device. After the terminal device UE receives the first optical signal, it converts it into a downlink signal to obtain the downlink signal.

[0129] For the combination of Lifi and 5G passive indoor distribution, that is, Lifi equipment and 5G passive network equipment (that is, 5G mobile communication passive communication equipment) are combined for signal transmission. Fig. 9 As shown in the figure, the terminal device UE accesses the 5G+Lifi signal transmission system. The control plane is still transmitted by 5G, the downlink part of the data plane is transmitted by Lifi, and the uplink part of the data plane is transmitted by 5G. Fig. 9 The middle dashed line is the control plane, the thin solid line is the data plane uplink, and the thick solid line is the data plane downlink. For 5G passive network equipment, during the data downlink transmission process, such as Fig. 9As shown, the second BBU in the passive network device receives the downlink signal sent by the core network, processes it to obtain a first electrical signal, the second BBU performs digital-to-analog conversion on the first electrical signal to obtain a first analog signal, and performs up-conversion processing on the first analog signal to obtain a first frequency-converted signal, which is sent to a distributed antenna unit, and the first frequency-converted signal is down-converted and analog-to-digital converted by the distributed antenna unit to obtain a first electrical signal, and the first frequency-converted signal is sent to the LiFi device, and the first electrical signal is sent to the LiFi device. The LiFi device generates a first optical signal based on the first electrical signal, and transmits the first optical signal through a signal light in the LiFi device. After receiving the first optical signal, the terminal device UE converts it into a downlink signal to obtain the downlink signal.

[0130] The BBU requirements of the 5G+Lifi signal transmission system, taking active network equipment as an example, for active network equipment, Lifi baseband processing capabilities can be introduced. In addition to the NR baseband processing unit providing the NR baseband processing capabilities, a Lifi baseband unit can be added to the first NR baseband unit to provide LiFi baseband processing capabilities. The Lifi baseband processing unit can be integrated into the first NR baseband unit, that is, the first NR baseband unit not only has the NR baseband processing capabilities, but also has the LiFi baseband processing capabilities, such as Fig.10 Alternatively, the LiFi processing unit may be an independent processing unit, that is, a first LiFi baseband unit, which is independent of the first NR baseband unit, and the first NR baseband unit and the first LiFi baseband unit are respectively connected to the first NR main control unit, as shown in FIG. Fig.11 As shown. The control plane is still transmitted by 5G, the downlink part of the data plane is transmitted by Lifi, and the uplink part of the data plane is transmitted by 5G. Broadcast data is transparently transmitted from 5GC to the first Lifi baseband unit through the first NR main control unit. User-level data is distinguished by user in the first NR main control unit, and is sent to the first Lifi baseband unit in combination with the user index.

[0131] In an embodiment of the present application, a 5G+Lifi signal transmission system is provided. Lifi serves as an SDL (supplemental downlink) solution for 5G, and can realize user time division / frequency division service processing. The signal transmission method in the embodiment of the present application can improve the security of indoor downlink data, and utilize optical communication to improve the indoor downlink service rate and transmission performance, and combine 5G with Lifi to establish a high-speed communication system.

[0132] See also Fig.12 , Fig.12 is a schematic diagram of the structure of a terminal device provided by an embodiment of the present invention, such as Fig.12 As shown, the terminal device 1200 includes:

[0133] The first sending module 1201 is used to send an uplink signal to a network device;

[0134] The first receiving module 1202 is used to receive a first optical signal generated by a downlink signal corresponding to an uplink signal sent by a visible light wireless communication LiFi device, and convert the first optical signal into a downlink signal.

[0135] In one embodiment, the network device is a mobile communication active communication device;

[0136] Sending uplink signals to network devices, including:

[0137] Sending an uplink signal to a radio remote unit in a mobile communication active communication device;

[0138] Receiving a first optical signal generated by a downlink signal corresponding to an uplink signal sent by a network device and sent by a visible light wireless communication LiFi device, comprising:

[0139] A first optical signal generated based on a first electrical signal sent by a hub or a radio frequency remote unit in a mobile communication active communication device and sent by a signal lamp in a LiFi device is received, wherein the first electrical signal is a signal generated by a first baseband unit in the active communication device based on a downlink signal.

[0140] In one embodiment, the network device is a mobile communication passive communication device;

[0141] Sending uplink signals to network devices, including:

[0142] sending an uplink signal to a distributed antenna unit in a mobile communication passive communication device;

[0143] Receiving a first optical signal generated by a downlink signal corresponding to an uplink signal sent by a network device and sent by a visible light wireless communication LiFi device, comprising:

[0144] A first optical signal generated based on a first electrical signal and sent by a signal light in a LiFi device is received, wherein the first electrical signal is a signal obtained by down-converting and analog-to-digital converting the first frequency-converted signal sent by the distributed antenna unit, and the first frequency-converted signal is a signal obtained by performing digital-to-analog conversion and up-converting on the first electrical signal obtained by converting the downlink signal by the second baseband unit in the mobile communication passive communication device.

[0145] In one embodiment, the downlink signal is a signal of the first user;

[0146] Receiving a first optical signal generated by a visible light wireless communication LiFi device based on a first electrical signal sent by a network device, comprising:

[0147] A first optical signal carried on a first target spectral frequency band and sent by a LiFi device is received, where the first target spectral frequency band corresponds to a first user.

[0148] The terminal device provided in the embodiment of the present application is a device that can implement the above-mentioned signal transmission method, and the technical features and technical effects correspond to each other, which will not be repeated here.

[0149] See also Fig.13 , Fig.13 is a schematic diagram of the structure of a network device provided by an embodiment of the present invention, such as Fig.13 As shown, the network device 1300 includes:

[0150] The second receiving module 1301 is used to receive an uplink signal sent by a terminal device;

[0151] The third receiving module 1302 is used to receive a downlink signal corresponding to the uplink signal sent by the server;

[0152] The second sending module 1303 is used to send a downlink signal to the LiFi device. The downlink signal is used by the LiFi device to send a first optical signal to the terminal device based on the uplink signal. The first optical signal is used by the terminal device to convert the first optical signal into a downlink signal.

[0153] In one embodiment, the network device is a mobile communication active communication device, the mobile communication active communication device includes a first baseband unit, a hub and a radio remote unit, the hub is connected between the radio remote unit and the first baseband unit, the terminal device is connected to the radio remote unit, and the first baseband unit is connected to the server through a core network;

[0154] Receive uplink signals sent by terminal equipment, including:

[0155] Receiving an uplink signal sent by a terminal device through a radio remote unit;

[0156] After the uplink signal sent by the terminal device is received by the radio remote unit, the method further includes:

[0157] The uplink signal is sent to the server through the hub, the first baseband unit and the core network.

[0158] In one embodiment, receiving a downlink signal sent by a server includes:

[0159] Receiving a downlink signal sent by the server through the first baseband unit;

[0160] Send downlink signals to LiFi devices, including:

[0161] Converting the downlink signal by a first baseband unit to obtain a first electrical signal;

[0162] The first electrical signal is transmitted to the hub through the first baseband unit, and the first electrical signal is sent to the LiFi device through the hub; or,

[0163] Transmitting the first electrical signal to the hub through the first baseband unit, transmitting the first electrical signal to the radio remote unit through the hub, and sending the first electrical signal to the LiFi device through the radio remote unit;

[0164] The first electrical signal is used by the LiFi device to generate a first optical signal based on the first electrical signal.

[0165] In one embodiment, the network device is a mobile communication passive communication device, the mobile communication passive communication device includes a second baseband unit, a radio frequency unit and a distributed antenna unit connected in sequence, the terminal device is connected to the distributed antenna unit, and the second baseband unit is connected to the server through the core network;

[0166] Receive uplink signals sent by terminal equipment, including:

[0167] Receiving an uplink signal sent by a terminal device through a distributed antenna unit;

[0168] After receiving the uplink signal sent by the terminal device through the distributed antenna unit, it also includes:

[0169] The uplink signal is sent to the server through the radio frequency unit, the second baseband unit and the core network.

[0170] In one embodiment, receiving a downlink signal sent by a server includes:

[0171] Receiving a downlink signal sent by the server through the second baseband unit;

[0172] Send downlink signals to LiFi devices, including:

[0173] Converting the downlink signal by the second baseband unit to obtain a first electrical signal;

[0174] Performing digital-to-analog conversion on the first electrical signal to obtain a first analog signal;

[0175] Performing up-conversion processing on the first analog signal to obtain a first frequency-converted signal;

[0176] Performing down-conversion processing and analog-to-digital conversion processing on the first frequency conversion signal through the distributed antenna unit to obtain a first electrical signal, and sending the first electrical signal to the LiFi device;

[0177] The first electrical signal is used by the LiFi device to generate a first optical signal based on the first electrical signal.

[0178] In one embodiment, the first baseband unit includes a first NR main control unit and a first NR baseband unit connected to each other, and the first NR baseband unit integrates new radio NR baseband processing capabilities and LiFi baseband processing capabilities; or,

[0179] The first baseband unit includes a first NR main control unit, a first NR baseband unit and a first LiFi baseband unit, and the first NR main control unit is connected to the first NR baseband unit and the first LiFi baseband unit respectively;

[0180] Among them, the first NR main control unit is also connected to the server through the core network.

[0181] In one embodiment, the second baseband unit includes a second NR main control unit and a second NR baseband unit connected to each other, and the second NR baseband unit integrates the new radio NR baseband processing capability and the LiFi baseband processing capability, or the second baseband unit includes a second NR main control unit, a second NR baseband unit and a second LiFi baseband unit, and the second NR main control unit is connected to the second NR baseband unit and the second LiFi baseband unit respectively;

[0182] Among them, the second NR main control unit is also connected to the server through the core network.

[0183] The terminal device provided in the embodiment of the present application is a device that can implement the above-mentioned signal transmission method, and the technical features and technical effects correspond to each other, which will not be repeated here.

[0184] An embodiment of the present invention also provides a terminal device, including: a processor, a memory, and a program stored in the memory and executable on the processor. When the program is executed by the processor, each process of the above-mentioned signal transmission method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0185] For details, see Fig.14 As shown, an embodiment of the present invention further provides a terminal device, including a bus 1401, a transceiver 1402, an antenna 1403, a bus interface 1404, a processor 1405 and a memory 1406.

[0186] The transceiver 1402 is used to send an uplink signal to a network device;

[0187] The transceiver 1402 is used to receive a first optical signal generated by a visible light wireless communication LiFi device based on a downlink signal corresponding to the uplink signal sent by the network device, and convert the first optical signal into a downlink signal.

[0188] In one embodiment, the network device is a mobile communication active communication device;

[0189] Sending uplink signals to network devices, including:

[0190] Sending an uplink signal to a radio remote unit in a mobile communication active communication device;

[0191] Receiving a first optical signal generated by a downlink signal corresponding to an uplink signal sent by a network device and sent by a visible light wireless communication LiFi device, comprising:

[0192] A first optical signal generated based on a first electrical signal sent by a hub or a radio frequency remote unit in a mobile communication active communication device and sent by a signal lamp in a LiFi device is received, wherein the first electrical signal is a signal generated by a first baseband unit in the active communication device based on a downlink signal.

[0193] In one embodiment, the network device is a mobile communication passive communication device;

[0194] Sending uplink signals to network devices, including:

[0195] sending an uplink signal to a distributed antenna unit in a mobile communication passive communication device;

[0196] Receiving a first optical signal generated by a downlink signal corresponding to an uplink signal sent by a network device and sent by a visible light wireless communication LiFi device, comprising:

[0197] A first optical signal generated based on a first electrical signal and sent by a signal light in a LiFi device is received, wherein the first electrical signal is a signal obtained by down-converting and analog-to-digital converting the first frequency-converted signal sent by the distributed antenna unit, and the first frequency-converted signal is a signal obtained by performing digital-to-analog conversion and up-converting on the first electrical signal obtained by converting the downlink signal by the second baseband unit in the mobile communication passive communication device.

[0198] In one embodiment, the downlink signal is a signal of the first user;

[0199] Receiving a first optical signal generated by a visible light wireless communication LiFi device based on a first electrical signal sent by a network device, comprising:

[0200] A first optical signal carried on a first target spectral frequency band and sent by a LiFi device is received, where the first target spectral frequency band corresponds to a first user.

[0201] exist Fig.14In the embodiment, the bus architecture (represented by bus 1401) may include any number of interconnected buses and bridges, and bus 1401 links various circuits including one or more processors represented by processor 1405 and memory represented by memory 1406. Bus 1401 may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. Bus interface 1404 provides an interface between bus 1401 and transceiver 1402. Transceiver 1402 may be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. Data processed by processor 1405 is transmitted on a wireless medium via antenna 1403, and further, antenna 1403 also receives data and transmits the data to processor 1405.

[0202] The processor 1405 is responsible for managing the bus 1401 and general processing, and may also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. The memory 1406 may be used to store data used by the processor 1405 when performing operations.

[0203] Optionally, the processor 1405 may be a CPU, an ASIC, an FPGA or a CPLD.

[0204] The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, each process of the above-mentioned signal transmission method embodiment for a terminal device is implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here. Among them, the computer-readable storage medium is such as ROM, RAM, magnetic disk or optical disk.

[0205] An embodiment of the present invention also provides a network device, including: a processor, a memory, and a program stored in the memory and executable on the processor. When the program is executed by the processor, each process of the above-mentioned signal transmission method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0206] For details, see Fig.15 The embodiment of the present invention further provides a network device, including a bus 1501, a transceiver 1502, an antenna 1503, a bus interface 1504, a processor 1505 and a memory 1506.

[0207] The transceiver 1502 is used to receive an uplink signal sent by a terminal device;

[0208] The transceiver 1502 is used to receive a downlink signal corresponding to the uplink signal sent by the server;

[0209] The transceiver 1502 is used to send the downlink signal to the LiFi device, and the downlink signal is used by the LiFi device to send a first optical signal to the terminal device based on the uplink signal, and the first optical signal is used by the terminal device to convert the first optical signal into the downlink signal.

[0210] In one embodiment, the network device is a mobile communication active communication device, the mobile communication active communication device includes a first baseband unit, a hub and a radio remote unit, the hub is connected between the radio remote unit and the first baseband unit, the terminal device is connected to the radio remote unit, and the first baseband unit is connected to the server through a core network;

[0211] Receive uplink signals sent by terminal equipment, including:

[0212] Receiving an uplink signal sent by a terminal device through a radio remote unit;

[0213] After the uplink signal sent by the terminal device is received by the radio remote unit, the method further includes:

[0214] The uplink signal is sent to the server through the hub, the first baseband unit and the core network.

[0215] In one embodiment, receiving a downlink signal sent by a server includes:

[0216] Receiving a downlink signal sent by the server through the first baseband unit;

[0217] Send downlink signals to LiFi devices, including:

[0218] Converting the downlink signal by a first baseband unit to obtain a first electrical signal;

[0219] The first electrical signal is transmitted to the hub through the first baseband unit, and the first electrical signal is sent to the LiFi device through the hub; or,

[0220] Transmitting the first electrical signal to the hub through the first baseband unit, transmitting the first electrical signal to the radio remote unit through the hub, and sending the first electrical signal to the LiFi device through the radio remote unit;

[0221] The first electrical signal is used by the LiFi device to generate a first optical signal based on the first electrical signal.

[0222] In one embodiment, the network device is a mobile communication passive communication device, the mobile communication passive communication device includes a second baseband unit, a radio frequency unit and a distributed antenna unit connected in sequence, the terminal device is connected to the distributed antenna unit, and the second baseband unit is connected to the server through the core network;

[0223] Receive uplink signals sent by terminal equipment, including:

[0224] Receiving an uplink signal sent by a terminal device through a distributed antenna unit;

[0225] After receiving the uplink signal sent by the terminal device through the distributed antenna unit, it also includes:

[0226] The uplink signal is sent to the server through the radio frequency unit, the second baseband unit and the core network.

[0227] In one embodiment, receiving a downlink signal sent by a server includes:

[0228] Receiving a downlink signal sent by the server through the second baseband unit;

[0229] Send downlink signals to LiFi devices, including:

[0230] Converting the downlink signal by the second baseband unit to obtain a first electrical signal;

[0231] Performing digital-to-analog conversion on the first electrical signal to obtain a first analog signal;

[0232] Performing up-conversion processing on the first analog signal to obtain a first frequency-converted signal;

[0233] Performing down-conversion processing and analog-to-digital conversion processing on the first frequency conversion signal through the distributed antenna unit to obtain a first electrical signal, and sending the first electrical signal to the LiFi device;

[0234] The first electrical signal is used by the LiFi device to generate a first optical signal based on the first electrical signal.

[0235] In one embodiment, the first baseband unit includes a first NR main control unit and a first NR baseband unit connected to each other, and the first NR baseband unit integrates new radio NR baseband processing capabilities and LiFi baseband processing capabilities; or,

[0236] The first baseband unit includes a first NR main control unit, a first NR baseband unit and a first LiFi baseband unit, and the first NR main control unit is connected to the first NR baseband unit and the first LiFi baseband unit respectively;

[0237] Among them, the first NR main control unit is also connected to the server through the core network.

[0238] In one embodiment, the second baseband unit includes a second NR main control unit and a second NR baseband unit connected to each other, and the second NR baseband unit integrates the new radio NR baseband processing capability and the LiFi baseband processing capability, or the second baseband unit includes a second NR main control unit, a second NR baseband unit and a second LiFi baseband unit, and the second NR main control unit is connected to the second NR baseband unit and the second LiFi baseband unit respectively;

[0239] Among them, the second NR main control unit is also connected to the server through the core network.

[0240] exist Fig.15 In the embodiment, the bus architecture (represented by bus 1501) is shown, and bus 1501 may include any number of interconnected buses and bridges, and bus 1501 links various circuits including one or more processors represented by processor 1505 and memory represented by memory 1506. Bus 1501 may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. Bus interface 1504 provides an interface between bus 1501 and transceiver 1502. Transceiver 1502 may be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. Data processed by processor 1505 is transmitted on a wireless medium via antenna 1503, and further, antenna 1503 also receives data and transmits the data to processor 1505.

[0241] The processor 1505 is responsible for managing the bus 1501 and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management and other control functions. The memory 1506 can be used to store data used by the processor 1505 when performing operations.

[0242] Optionally, the processor 1505 may be a CPU, an ASIC, an FPGA or a CPLD.

[0243] The embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, each process of the above-mentioned signal transmission method embodiment for a network device is implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here. Among them, the computer-readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0244] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0245] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods of various embodiments of the present invention.

[0246] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A signal transmission method, applied to a terminal device, characterized in that: The method comprises: Sending uplink signals to network devices; Receiving a first optical signal generated by a downlink signal corresponding to the uplink signal sent by the network device and sent by a visible light wireless communication LiFi device, and converting the first optical signal into a downlink signal; The downlink signal is a signal of the first user; The receiving device sends a first optical signal generated based on a first electrical signal sent by the network device, comprising: Receiving a first optical signal carried on a first target spectral frequency band and sent by the LiFi device, where the first target spectral frequency band corresponds to the first user; The network device is a mobile communication active communication device; The sending of an uplink signal to the network device comprises: Sending an uplink signal to a radio remote unit in the mobile communication active communication device; The first optical signal generated by the downlink signal corresponding to the uplink signal sent by the network device and received by the visible light wireless communication LiFi device includes: Receiving a first optical signal generated by a signal light in the LiFi device based on a first electrical signal sent by a hub or a radio remote unit in the mobile communication active communication device, wherein the first electrical signal is a signal generated by a first baseband unit in the active communication device based on the downlink signal; or, The network device is a mobile communication passive communication device; The sending of an uplink signal to the network device comprises: Sending an uplink signal to a distributed antenna unit in the mobile communication passive communication device; The first optical signal generated by the downlink signal corresponding to the uplink signal sent by the network device and received by the visible light wireless communication LiFi device includes: A first optical signal generated based on a first electrical signal and sent by a signal light in the LiFi device is received, wherein the first electrical signal is a signal obtained by down-converting and analog-to-digital converting the first frequency-converted signal sent by the distributed antenna unit, and the first frequency-converted signal is a signal obtained by performing digital-to-analog conversion and up-converting on the first electrical signal obtained by converting the downlink signal by the second baseband unit in the mobile communication passive communication device.

2. A signal transmission method, applied to a network device, characterized in that: The method comprises: Receive uplink signals sent by terminal equipment; Receiving a downlink signal corresponding to the uplink signal sent by a server; Sending the downlink signal to the LiFi device, where the downlink signal is used by the LiFi device to send a first optical signal to the terminal device based on the uplink signal, where the first optical signal is used by the terminal device to convert the first optical signal into the downlink signal; The downlink signal is a signal of the first user; The LiFi device sends a first optical signal to the terminal device based on the uplink signal, including: The LiFi device sends a first optical signal carried on a first target spectral frequency band to the terminal device, where the first target spectral frequency band corresponds to the first user; The network device is a mobile communication active communication device, which includes a first baseband unit, a hub and a radio remote unit, the hub is connected between the radio remote unit and the first baseband unit, the terminal device is connected to the radio remote unit, and the first baseband unit is connected to the server through a core network; The receiving an uplink signal sent by a terminal device includes: Receiving the uplink signal sent by the terminal device through the radio remote unit; The receiving a downlink signal sent by the server comprises: Receiving, through the first baseband unit, a downlink signal sent by the server; The sending the downlink signal to the LiFi device includes: Converting the downlink signal by the first baseband unit to obtain a first electrical signal; The first electrical signal is transmitted to the hub through the first baseband unit, and the first electrical signal is sent to the LiFi device through the hub; or, Transmitting the first electrical signal to the hub through the first baseband unit, transmitting the first electrical signal to the radio remote unit through the hub, and sending the first electrical signal to the LiFi device through the radio remote unit; or, The network device is a mobile communication passive communication device, the mobile communication passive communication device comprises a second baseband unit, a radio frequency unit and a distributed antenna unit connected in sequence, the terminal device is connected to the distributed antenna unit, and the second baseband unit is connected to the server through a core network; The receiving an uplink signal sent by a terminal device includes: Receiving the uplink signal sent by the terminal device through the distributed antenna unit; The receiving a downlink signal sent by the server comprises: Receiving a downlink signal sent by the server through the second baseband unit; The sending the downlink signal to the LiFi device includes: Converting the downlink signal by the second baseband unit to obtain a first electrical signal; Performing digital-to-analog conversion on the first electrical signal to obtain a first analog signal; Performing up-conversion processing on the first analog signal to obtain a first frequency-converted signal; Performing down-conversion processing and analog-to-digital conversion processing on the first frequency-converted signal through the distributed antenna unit to obtain a first electrical signal, and sending the first electrical signal to the LiFi device; The first electrical signal is used by the LiFi device to generate the first optical signal based on the first electrical signal.

3. The signal transmission method according to claim 2, characterized in that: After the uplink signal sent by the terminal device is received by the radio remote unit, the method further includes: The uplink signal is sent to the server through the hub, the first baseband unit and the core network.

4. The signal transmission method according to claim 2, characterized in that: After receiving the uplink signal sent by the terminal device through the distributed antenna unit, the method further includes: The uplink signal is sent to the server through the radio frequency unit, the second baseband unit and the core network.

5. The signal transmission method according to claim 2, characterized in that: The first baseband unit includes a first NR main control unit and a first NR baseband unit connected to each other, and the first NR baseband unit integrates new radio NR baseband processing capabilities and LiFi baseband processing capabilities; or, The first baseband unit includes a first NR main control unit, a first NR baseband unit and a first LiFi baseband unit, and the first NR main control unit is connected to the first NR baseband unit and the first LiFi baseband unit respectively; Among them, the first NR main control unit is also connected to the server through the core network.

6. The signal transmission method according to claim 2, characterized in that: The second baseband unit includes a second NR main control unit and a second NR baseband unit connected to each other, and the second NR baseband unit integrates new radio NR baseband processing capabilities and LiFi baseband processing capabilities, or the second baseband unit includes a second NR main control unit, a second NR baseband unit and a second LiFi baseband unit, and the second NR main control unit is connected to the second NR baseband unit and the second LiFi baseband unit respectively; Among them, the second NR main control unit is also connected to the server through the core network.

7. A terminal device, characterized in that: The terminal device comprises: A first sending module, used for sending an uplink signal to a network device; A first receiving module is used to receive a first optical signal generated by a visible light wireless communication LiFi device based on a downlink signal corresponding to the uplink signal sent by the network device, and convert the first optical signal into a downlink signal; The downlink signal is a signal of the first user; Receiving a first optical signal generated by a visible light wireless communication LiFi device based on a first electrical signal sent by a network device, comprising: receiving a first optical signal carried on a first target spectral frequency band and sent by a LiFi device, where the first target spectral frequency band corresponds to a first user; Wherein, the network device is a mobile communication active communication device; The sending of an uplink signal to the network device comprises: Sending an uplink signal to a radio remote unit in the mobile communication active communication device; The first optical signal generated by the downlink signal corresponding to the uplink signal sent by the network device and received by the visible light wireless communication LiFi device includes: Receiving a first optical signal generated by a signal light in the LiFi device based on a first electrical signal sent by a hub or a radio remote unit in the mobile communication active communication device, wherein the first electrical signal is a signal generated by a first baseband unit in the active communication device based on the downlink signal; or, The network device is a mobile communication passive communication device; The sending of an uplink signal to the network device comprises: Sending an uplink signal to a distributed antenna unit in the mobile communication passive communication device; The first optical signal generated by the downlink signal corresponding to the uplink signal sent by the network device and received by the visible light wireless communication LiFi device includes: A first optical signal generated based on a first electrical signal and sent by a signal light in the LiFi device is received, wherein the first electrical signal is a signal obtained by down-converting and analog-to-digital converting the first frequency-converted signal sent by the distributed antenna unit, and the first frequency-converted signal is a signal obtained by performing digital-to-analog conversion and up-converting on the first electrical signal obtained by converting the downlink signal by the second baseband unit in the mobile communication passive communication device.

8. A network device, characterized in that: The network equipment includes: A second receiving module, used to receive an uplink signal sent by a terminal device; A third receiving module, used to receive a downlink signal corresponding to the uplink signal sent by the server; A second sending module, configured to send the downlink signal to the LiFi device, wherein the downlink signal is used by the LiFi device to send a first optical signal to the terminal device based on the uplink signal, and the first optical signal is used by the terminal device to convert the first optical signal into the downlink signal; The downlink signal is a signal of the first user; The LiFi device sends a first optical signal to the terminal device based on the uplink signal, including: The LiFi device sends a first optical signal carried on a first target spectral frequency band to the terminal device, where the first target spectral frequency band corresponds to the first user; The network device is a mobile communication active communication device, which includes a first baseband unit, a hub and a radio remote unit, the hub is connected between the radio remote unit and the first baseband unit, the terminal device is connected to the radio remote unit, and the first baseband unit is connected to the server through a core network; The receiving an uplink signal sent by a terminal device includes: Receiving the uplink signal sent by the terminal device through the radio remote unit; The receiving a downlink signal sent by the server comprises: Receiving, through the first baseband unit, a downlink signal sent by the server; The sending the downlink signal to the LiFi device includes: Converting the downlink signal by the first baseband unit to obtain a first electrical signal; The first electrical signal is transmitted to the hub through the first baseband unit, and the first electrical signal is sent to the LiFi device through the hub; or, Transmitting the first electrical signal to the hub through the first baseband unit, transmitting the first electrical signal to the radio remote unit through the hub, and sending the first electrical signal to the LiFi device through the radio remote unit; or, The network device is a mobile communication passive communication device, the mobile communication passive communication device comprises a second baseband unit, a radio frequency unit and a distributed antenna unit connected in sequence, the terminal device is connected to the distributed antenna unit, and the second baseband unit is connected to the server through a core network; The receiving an uplink signal sent by a terminal device includes: Receiving the uplink signal sent by the terminal device through the distributed antenna unit; The receiving a downlink signal sent by the server comprises: Receiving a downlink signal sent by the server through the second baseband unit; The sending the downlink signal to the LiFi device includes: Converting the downlink signal by the second baseband unit to obtain a first electrical signal; Performing digital-to-analog conversion on the first electrical signal to obtain a first analog signal; Performing up-conversion processing on the first analog signal to obtain a first frequency-converted signal; Performing down-conversion processing and analog-to-digital conversion processing on the first frequency-converted signal through the distributed antenna unit to obtain a first electrical signal, and sending the first electrical signal to the LiFi device; The first electrical signal is used by the LiFi device to generate the first optical signal based on the first electrical signal.

9. A terminal device, characterized in that: Including transceiver, The transceiver is used to send an uplink signal to the network device; The transceiver is used to receive a first optical signal generated by a visible light wireless communication LiFi device based on a downlink signal corresponding to the uplink signal sent by the network device, and convert the first optical signal into a downlink signal; The downlink signal is a signal of the first user; Receiving a first optical signal generated by a visible light wireless communication LiFi device based on a first electrical signal sent by a network device, comprising: receiving a first optical signal carried on a first target spectral frequency band and sent by a LiFi device, where the first target spectral frequency band corresponds to a first user; The network device is a mobile communication active communication device; The sending of an uplink signal to the network device comprises: Sending an uplink signal to a radio remote unit in the mobile communication active communication device; The first optical signal generated by the downlink signal corresponding to the uplink signal sent by the network device and received by the visible light wireless communication LiFi device includes: Receiving a first optical signal generated by a signal light in the LiFi device based on a first electrical signal sent by a hub or a radio remote unit in the mobile communication active communication device, wherein the first electrical signal is a signal generated by a first baseband unit in the active communication device based on the downlink signal; or, The network device is a mobile communication passive communication device; The sending of an uplink signal to the network device comprises: Sending an uplink signal to a distributed antenna unit in the mobile communication passive communication device; The first optical signal generated by the downlink signal corresponding to the uplink signal sent by the network device and received by the visible light wireless communication LiFi device includes: A first optical signal generated based on a first electrical signal and sent by a signal light in the LiFi device is received, wherein the first electrical signal is a signal obtained by down-converting and analog-to-digital converting the first frequency-converted signal sent by the distributed antenna unit, and the first frequency-converted signal is a signal obtained by performing digital-to-analog conversion and up-converting on the first electrical signal obtained by converting the downlink signal by the second baseband unit in the mobile communication passive communication device.

10. A network device, characterized in that: Including transceiver, The transceiver is used to receive an uplink signal sent by a terminal device; The transceiver is used to receive a downlink signal corresponding to the uplink signal sent by the server; The transceiver is used to send the downlink signal to the LiFi device, the downlink signal is used by the LiFi device to send a first optical signal to the terminal device based on the uplink signal, and the first optical signal is used by the terminal device to convert the first optical signal into the downlink signal; The downlink signal is a signal of the first user; The LiFi device sends a first optical signal to the terminal device based on the uplink signal, including: The LiFi device sends a first optical signal carried on a first target spectral frequency band to the terminal device, where the first target spectral frequency band corresponds to the first user; The network device is a mobile communication active communication device, which includes a first baseband unit, a hub and a radio remote unit, the hub is connected between the radio remote unit and the first baseband unit, the terminal device is connected to the radio remote unit, and the first baseband unit is connected to the server through a core network; The receiving an uplink signal sent by a terminal device includes: Receiving the uplink signal sent by the terminal device through the radio remote unit; The receiving a downlink signal sent by the server comprises: Receiving, through the first baseband unit, a downlink signal sent by the server; The sending the downlink signal to the LiFi device includes: Converting the downlink signal by the first baseband unit to obtain a first electrical signal; The first electrical signal is transmitted to the hub through the first baseband unit, and the first electrical signal is sent to the LiFi device through the hub; or, Transmitting the first electrical signal to the hub through the first baseband unit, transmitting the first electrical signal to the radio remote unit through the hub, and sending the first electrical signal to the LiFi device through the radio remote unit; or, The network device is a mobile communication passive communication device, the mobile communication passive communication device comprises a second baseband unit, a radio frequency unit and a distributed antenna unit connected in sequence, the terminal device is connected to the distributed antenna unit, and the second baseband unit is connected to the server through a core network; The receiving an uplink signal sent by a terminal device includes: Receiving the uplink signal sent by the terminal device through the distributed antenna unit; The receiving a downlink signal sent by the server comprises: Receiving a downlink signal sent by the server through the second baseband unit; The sending the downlink signal to the LiFi device includes: Converting the downlink signal by the second baseband unit to obtain a first electrical signal; Performing digital-to-analog conversion on the first electrical signal to obtain a first analog signal; Performing up-conversion processing on the first analog signal to obtain a first frequency-converted signal; Performing down-conversion processing and analog-to-digital conversion processing on the first frequency-converted signal through the distributed antenna unit to obtain a first electrical signal, and sending the first electrical signal to the LiFi device; The first electrical signal is used by the LiFi device to generate the first optical signal based on the first electrical signal.

11. A terminal device, comprising: A processor, a memory, and a program stored in the memory and executable on the processor, wherein the program implements the steps of the signal transmission method according to claim 1 when executed by the processor.

12. A network device comprising: A processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the signal transmission method as described in any one of claims 2 to 6.

13. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the signal transmission method as described in claim 1 are implemented; or when the computer program is executed by a processor, the steps of the signal transmission method as described in any one of claims 2-6 are implemented.

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