CN113098600A

CN113098600A - 6G network floodlight communication architecture constructed based on 6G photonics

Info

Publication number: CN113098600A
Application number: CN202010021757.4A
Authority: CN
Inventors: 余少华; 陈亮
Original assignee: Wuhan Research Institute of Posts and Telecommunications Co Ltd
Current assignee: Wuhan Research Institute of Posts and Telecommunications Co Ltd
Priority date: 2020-01-09
Filing date: 2020-01-09
Publication date: 2021-07-09

Abstract

The application relates to a 6G network floodlight communication architecture constructed based on 6G photonics. According to an exemplary embodiment, there is provided a floodlight communication base station, including a floodlight air interface device, where the floodlight air interface device includes: the broadband floodlight radiation array comprises a plurality of floodlight radiation units and a floodlight terminal, wherein the floodlight radiation units are used for transmitting floodlight signals to the floodlight terminal in a floodlight frequency band; and the broadband floodlight detection array comprises a plurality of broadband floodlight detection units and is used for detecting floodlight signals emitted by the floodlight terminal.

Description

6G network floodlight communication architecture constructed based on 6G photonics

Technical Field

The present application relates generally to the field of wireless communication, and more particularly, to a 6G network floodlight communication architecture constructed based on 6G photonics, which belongs to the interdisciplinary subject of co-development of 6G (i.e., sixth generation mobile communication, including millimeter wave, terahertz communication, etc.) and photonics (including high-frequency terahertz light, infrared, ultraviolet, and visible light communication, etc.).

Background

The sixth generation mobile communication system (6G) is a next generation mobile communication network following 5G. Compared with a 5G network, the 6G network at least has ultrahigh network speed, ultralow communication time delay and wider coverage depth, ultrahigh frequency wireless spectrum resources such as millimeter waves, terahertz and light waves can be fully shared, technologies such as ground mobile communication, satellite internet and microwave network are combined, and an integrated green network with all-thing group cooperation, data intelligent sensing, safe real-time evaluation and space-ground cooperative coverage is formed.

The future 6G network needs a large amount of continuous spectrum resources, which are already extended to the terahertz frequency band, but still does not solve the problem of extremely deficient radio spectrum resources, and it is difficult to develop new resources in the subsequent radio technology evolution, and developing radio spectrum resources with a wide space is one of the key factors for determining the success or failure of 6G, and is also a major engineering and technology problem faced by human needs. Mining the optical spectrum resources with higher frequency becomes a necessary way for the development of future mobile communication. High-frequency terahertz (such as more than 3 THz) has optical characteristics, is a transition region from electronics to photonics, and has the same optical and physical characteristics as visible light, so that floodlight spectrum resources represented by high-frequency terahertz light, infrared light, visible light and ultraviolet light of various colors and the like gradually become a focus of attention in the industry, and mobile communication will enter a floodlight communication era from terahertz (THz) to terahertz (PHz) in the future.

Disclosure of Invention

Mobile communication needs a large amount of continuous spectrum resources, 6G networks have already expanded the spectrum resources to the terahertz frequency band, while traditional spectrum resources have reached an extremely deficient stage, it is difficult to develop new wireless microwave frequency band resources in the subsequent wireless technology evolution, and a wide spectrum resource is entering the visual field of people. In the application, the spectrum resource of free space optical communication represented by high-frequency terahertz light, infrared light, visible light with various colors and ultraviolet light is defined as a floodlight frequency band, and then a concept of 6G photonics is introduced, which means that the sixth generation mobile communication (6G, including high-frequency terahertz optical communication and the like) and photonics (including infrared light, ultraviolet light, visible light communication and the like) are cooperatively developed together, so that a cross discipline of the technical problem that the spectrum resource is almost exhausted, and the 6G communication rate and capacity are required to be improved by hundreds to thousands times compared with the 5G communication rate and capacity is provided is solved. Different from the existing Visible Light Communication (VLC) technology, the present application first proposes the concept of the Flood Light Communication (FLC), which is a novel Communication mode capable of breaking the wireless spectrum limitation and performing backward compatibility and smooth evolution with the conventional wireless terahertz Communication, and is a main research object in the field of this emerging sub-discipline of 6G photonics.

The engineering science and technology problems mainly faced by the application are that the current international wireless frequency spectrum (2G/3G/4G/5G) is basically used up, the subsequent frequency spectrum resources are almost exhausted, the 6G communication speed and capacity relative to 5G need to be increased by hundreds to thousands of times, and how to meet the important international requirement. Therefore, the floodlight communication architecture based on the 6G network organically combines the floodlight air interface, the floodlight base station and the floodlight terminal, and utilizes the floodlight frequency spectrum resource (frequency is 3 multiplied by 10) with wide prospect¹²～3×10¹⁶Hz, wavelength of 100 mu m-10 nm) to form a floodlight communication architecture of the future 6G free space. The architecture enables a user to obtain the data access transmission experience of ultra-high speed, ultra-large capacity and ultra-long span, and the bandwidth between the terminal and the base station (6G network) is expanded to 100Gbps or even 1Tbps or even higher.

One aspect of the application provides a floodlight communication base station, including floodlight air interface device, floodlight air interface device includes: the broadband floodlight radiation array comprises a plurality of floodlight radiation units and a floodlight terminal, wherein the floodlight radiation units are used for transmitting floodlight signals to the floodlight terminal in a floodlight frequency band; and the broadband floodlight detection array comprises a plurality of broadband floodlight detection units and is used for detecting floodlight signals emitted by the floodlight terminal.

In some exemplary embodiments, the floodlight communication base station further comprises: the at least one stage of optical signal amplifier is used for amplifying the floodlight signal; a modulation/demodulation module, configured to modulate a signal to be sent over an optical air interface, or demodulate a signal received over the optical air interface; the optical filter bank is used for filtering the required frequency band of the ultra-wideband optical radiation; the signal coding module is used for coding a channel and a signal source; and the signaling conversion module is used for analyzing the information in the optical signal.

In some exemplary embodiments, the floodlight communication base station has one of two cellular network architectures: the method comprises the following steps of (1) cellular networking taking a base station as a center, wherein a floodlight radiation source is regarded as a cell base station, and user access and resource management are controlled through centralized scheduling of the base station; and a user-centric cellular networking, wherein the user-centric resource management is performed such that optical signals of the plurality of flood radiation sources are coordinated with each other user-centric.

In some exemplary embodiments, the floodlight interface device further comprises: an optical pixel imaging detection array includes a plurality of optical pixel detection units for performing imaging detection on a two-dimensional spatial signal stream to recover transmitted information.

In some exemplary embodiments, the broadband flood detection array and the optical pixel imaging detection array are integrated into the same integrated array.

In some exemplary embodiments, the floodlight interface device is constructed as a planar directional array or a spherical omnidirectional array.

In some exemplary embodiments, the floodlight interface apparatus further comprises one or more of the following: optical signal power amplifiers, modems, multiplexers, demultiplexers, optical switches, and integrated transceivers.

In some exemplary embodiments, the flood radiation unit is a single light radiation source comprising an LED, a micro-LED or a laser.

In some exemplary embodiments, the broadband flood radiation array further includes a free-form surface lens or a photonic crystal lens with a micro-nano structure, so as to process the light signal emitted by the flood radiation unit, and make the divergent light become the collimated light.

In some exemplary embodiments, the optical signals emitted and detected by the floodlight interface device are in a range of 3THz to 30PHz, and include one or more of visible light, high-frequency terahertz light waves, infrared light, and ultraviolet light.

In some exemplary embodiments, in the visible light region of the user activity, the emitted and detected floodlight signal employs a frequency range including visible light, and in the dark environment, the emitted and detected floodlight signal employs a frequency range other than visible light.

In some exemplary embodiments, the flood signals emitted by the broad band flood radiation array include one or more of: a floodlight signal with the flashing speed exceeding the threshold value of human eyes and the luminous intensity changing rapidly; single/multi-photon signals for point-to-multipoint communication; and a two-dimensional signal space stream floodlight signal emitted by the light source array.

In some exemplary embodiments, the radiation intensity of the broadband flood radiation array is modulated according to the user's intensity, and energy is concentrated to a coverage area by directional beamforming and/or beam shaping.

In some example embodiments, multipoint-to-multipoint transmissions are made between a plurality of base stations for flood communications.

In some exemplary embodiments, the floodlight communication base station is constructed based on 6G photonics and is connected or transmitted to a 6G core network through an optical carrier network.

One aspect of the present application provides a floodlight communication terminal, including: the broadband light radiation source is used for transmitting an uplink floodlight signal; the broadband light detector is used for receiving the downlink floodlight signal; and the photoelectric conversion circuit is used for performing photoelectric conversion between the optical path device and the circuit device in the floodlight communication terminal.

In some exemplary embodiments, the floodlight communication terminal further comprises: the optical signal amplifier is used for carrying out power amplification on the floodlight signal; and the light filtering module is used for filtering the floodlight signal to obtain the floodlight signal with the required frequency.

In some exemplary embodiments, the floodlight communication terminal communicates with the floodlight communication base station through a wireless light path.

In some exemplary embodiments, the floodlight communication terminal is one of a mobile phone and a vehicle-mounted mobile terminal.

In some exemplary embodiments, the upstream and downstream floodlight signals are in a range of 3THz to 30PHz, including one or more of visible light, high frequency terahertz light waves, infrared light, and ultraviolet light.

One aspect of the present application provides a floodlight communication network system, including: and the floodlight communication base station is in floodlight signal communication with the floodlight communication terminal.

In some exemplary embodiments, the floodlight signal available frequency band of the floodlight communication network system is in a range of 3THz to 30PHz, and the access rate is in a range of 100Gbps to 1 Tbps.

In some exemplary embodiments, the floodlight signal of the floodlight communication network system comprises one or more of visible light, high-frequency terahertz light waves, infrared light and ultraviolet light.

In some exemplary embodiments, the floodlight communication base station operates with a frequency range including visible light in a visible light region where a user is active, and operates with a frequency range other than visible light in a dark environment.

In some exemplary embodiments, the floodlight communication network system is constructed based on 6G photonics, and the floodlight communication base station is connected or transmitted to a 6G core network through an optical carrier network.

The foregoing and other features and advantages of the present application will become apparent from the following description of exemplary embodiments.

Drawings

The above and other objects, features and advantages of the present application will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings, like reference numbers generally represent like parts or steps.

Fig. 1 shows a schematic diagram of the relationship between a visible light VLC resource and a floodlight resource.

Fig. 2 shows a schematic diagram of spectrum resource partitioning including visible light resources and floodlight resources.

Fig. 3 shows a schematic system architecture diagram of a 6G floodlight communication network according to an exemplary embodiment of the present application.

Fig. 4 shows a schematic structural diagram of an optical antenna according to an exemplary embodiment of the present application.

Fig. 5 is a schematic diagram illustrating a multi-point-to-multi-point transmission mode adopted among multiple optical air interface devices according to an exemplary embodiment of the present application.

Fig. 6 shows a functional block diagram of a floodlight base station according to an exemplary embodiment of the present application.

Fig. 7 shows a functional block diagram of a floodlight terminal according to an exemplary embodiment of the present application.

Detailed Description

Hereinafter, exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings. It should be understood that the described embodiments are only some embodiments of the present application and not all embodiments of the present application, and that the present application is not limited by the example embodiments described herein.

With the rapid development of information technology, the dilemma of insufficient spectrum resources is increasingly highlighted. The spectrum band where the floodlight is located is always an idle resource for communication, which is a great waste. In order to efficiently utilize spectrum resources, a new communication spectrum resource for free space floodlight communication is developed, so that the available resources are more than 1 ten thousand times of the existing radio communication spectrum.

The engineering and technology problems mainly faced by the present application are that the radio spectrum as an unrecoverable resource is nearly exhausted, and compared with a 5G network, the 6G communication capacity and the bandwidth are further improved by hundreds or thousands of times compared with 5G, and the exhausted resource makes the performance of the mobile communication network difficult to obtain further breakthrough. Fig. 1 shows a schematic diagram of a relationship between a visible light VLC resource and a floodlight resource, and fig. 2 shows a schematic diagram of a spectrum resource division including the visible light VLC resource and the floodlight resource. It can be understood that the spectrum resources used by visible light VLC are a subset of floodlight (as shown in fig. 1), and the bandwidth of the frequency band is narrow and far less extensive than the spectrum resources included in floodlight. The application provides a 6G network floodlight communication architecture based on 6G photonics, a future new generation mobile communication system is composed of a floodlight air interface, a floodlight base station and a floodlight terminal, floodlight spectrum resources with wide frequency bands are fully utilized, integrated novel spectrum resources such as high-frequency terahertz (more than 3 THz), infrared rays, visible light with various colors and ultraviolet rays are used as carriers of user data (shown in figure 2), idle frequency bands, authorized and unauthorized frequency bands of the floodlight spectrum resources from terahertz (THz) to Hertz (PHz) are shared, ultrahigh-rate, ultrahigh-capacity and ultralong-span mobile data transmission is provided, and development requirements of 6G services are met. Thus, the uplink and downlink bandwidth between the terminal and the network can be extended to 100G bps or even 1T bps or higher.

For example, a small micro base station may be installed on a fluorescent lamp in a classroom, a street lamp in a city street, an LED lamp in a home, a lighting facility in a station, an airport, a dock, a shop, a library, an office, and the like. The problems of inflexibility and inconvenience of wired access in a room are solved; the problems of weak wireless access signals and low bandwidth are solved; the illumination and fast response characteristics of the LEDs enable both high quality lighting experience and high speed communication experience. Enabling ubiquitous coverage of lighting and communications: global lighting networks, with approximately 460 million indoor lights, 160 million outdoor lights; there are approximately 1800 million global macrocell mobile base stations and more than 5 hundred million Wi-Fi access points. The visible light spectrum occupies about 300THz bandwidth, and the traditional wireless spectrum is about 30GHz, so that the visible light communication has ultrahigh-speed communication and access potential. The modulation bandwidth is about 40MHz by using commercial LEDs, the utilization rate of visible spectrum is only 700 ten-thousandth, so that the available frequency space is large, and the space for improving the communication speed is remarkably improved. The LED is efficient and energy-saving, the communication is integrated by means of illumination, and green and energy-saving communication can be realized. The visible light communication also has the characteristics of directional radiation, rapid attenuation, high space reuse rate and the like, and opens up brand-new frequency spectrum resources. The VLC optical uplink is a short board that can make up for this deficiency by tightly coupling with Wi-Fi. Another problem to be solved by the present application further includes: traditional visible light communication can not realize reliable communication under night or low light scene, and contains the frequency channel of a large amount of invisible light in the floodlight spectrum, and the development space is very big, can effectually avoid unnecessary light pollution. It follows that free space based floodlight communication will be the direction of future evolution of visible light communication.

The application expands the available frequency band of the traditional mobile communication to 3 THz-30 PHz (frequency 3 multiplied by 10)¹²～3×10¹⁶Hertz, wavelength 100 μm to 10nm, approximately thirty thousand terahertz spectrum bandwidths) comprising: high-frequency terahertz light, infrared light, visible light with various colors, ultraviolet light and The like (as shown in fig. 2), and a three-light communication Architecture (The Triple flood Architecture) based on a flood air interface, a flood base station and a flood terminal of a 6G network is established. The floodlight communication in free space is formed by the visible light range, the high-frequency terahertz light, the infrared light, the ultraviolet light and other invisible light ranges. The floodlight source of the invisible light can meet the requirements of users at night and in low-light scenes, and can effectively avoid unnecessary light pollution. The high-frequency terahertz has not only the physical characteristics of wireless microwaves but also the physical characteristics of light waves, and is one of the important transmission frequency bands of floodlight communication.

Fig. 3 shows a schematic system architecture diagram of a 6G floodlight communication network according to an exemplary embodiment of the present application. In the system architecture shown in fig. 3, on the basis of inheriting the naming mode of the 5G network air interface (5G New Radio,5G NR) and the base station system (gNB), the optical air interface of the 6G network is defined as 6G FLR (6G flow Light Radio), and the optical base station system of the 6G network is defined as 6G FL-NB (6G flow Light Node B). As shown in fig. 3, the 6G floodlight communication network of the present application mainly involves three parts, 6G FLR, FL-NB and optical terminal, and is compatible with existing LTE eNB and 5G gbb networks.

Referring to fig. 3, a 6G floodlight communication network comprises a floodlight base station 10 and a floodlight air interface device 20. It should be understood herein that while the floodlight base station 10 and the floodlight air interface device 20 are shown as two devices for ease of description herein, they may also be collectively referred to as, or belong to, a floodlight base station. The floodlight base station 10 described herein is a base station control system based on floodlight exchange, and the floodlight interface device 20 is a floodlight access device, so that a floodlight terminal 30 described later can access to the floodlight base station 10 via the floodlight interface device 20 (or access device).

The floodlight base station 10 differs from conventional wireless communication base stations, such as 4G LTE base stations eNB and 5G base stations gNB, mainly in that the data exchanged by the floodlight base station 10 is entirely based on floodlight signals, and therefore, as mentioned above, has significant advantages in terms of frequency and bandwidth, etc., compared to conventional base stations. Other aspects of the floodlight base station 10, such as the protocols applied therein, etc., may utilize or be compatible with protocols in 5G base stations, or may be a 6G photonic communication protocol developed in the future. The floodlight base station 10 may relay the processed data through optical-to-electrical conversion, and transmit the data to a conventional 4G LTE base station eNB or a 5G base station gNB network, so as to be compatible with an existing network, and may also transmit the data to a 6G core network, which may also be an all-optical network.

In some embodiments, the floodlight base station 10 may have various all-optical switching control modules as a processing control unit of the floodlight radiation signal, and is an optical signal data switching and processing center of the floodlight communication architecture. As will be described below, the floodlight base station 10 can have functions of multi-stage amplification, modulation/demodulation, optical filter bank, channel/source coding and signaling parsing for the transmitted floodlight signal.

In some embodiments, the cellular network architecture of the floodlight mobile communication base station 10 can be divided into two types, a base station-centric conventional cellular networking and a user-centric novel cellular networking. The former architecture regards the floodlight radiation source as a 'cell base station', and controls user access and resource management through centralized scheduling of the base station, which is similar to the base stations in the 4G network and the 5G network; the latter framework performs resource management by taking a user as a center, so that optical signals of a plurality of floodlight radiation sources are mutually matched by taking the user as the center, the experience quality of each user is improved, the cell edge or cell switching is not perceived, and the transmission service quality of the system is integrally improved.

The same floodlight base station 10 can be associated with multiple floodlight air interface units 20, where the floodlight air interface units 20 are floodlight access points of an overall floodlight communication architecture, which can be disposed at multiple remote locations or sites around the base station. The floodlight interface device 20 may include, for example, a broadband floodlight radiation source (e.g., an LED or Micro-LED light source, a broadband laser, etc.) capable of emitting terahertz light, infrared light, visible light, ultraviolet light, etc., or an nxm radiation integrated array composed of a plurality of broadband floodlight radiation sources, so as to transmit modulated user data signals according to different floodlight frequency bands. The floodlight interface device 20 further comprises a light detector (e.g., a photosensitive array with ultra-wide spectral response or an optical imaging array) or an integrated array of multiple light detectors capable of receiving floodlight signals of corresponding frequency bands, and the floodlight signals can be received through technologies such as spectral sensing, photon counting, and optical imaging. These radiating transmitting and receiving arrays constitute an optical antenna system of a floodlight communication architecture. The optical signal to be transmitted or received may also be power amplified by the floodlight interface device 20.

Different from the conventional wireless antenna feed system, the optical antenna (specifically, the broadband floodlight radiation source) of the floodlight air port device 20 utilizes a free-form surface lens or a photonic crystal lens with a micro-nano structure to process the optical signal emitted by the floodlight radiation source, so that the diffused light becomes collimated light, and a specific floodlight super-spectrum optical antenna is formed. In order to be fused with the existing wireless communication, the coverage area formed by the optical antenna can be a traditional cellular cell, and a non-cellular signal coverage area can also be formed according to requirements, so that a floodlight communication network is conveniently and flexibly established, and the frequency spectrum utilization efficiency is higher. Meanwhile, the optical air interface supports the optical link to move quickly, is compatible with various optical infrastructures, and can adapt to noise and interference caused by surrounding environment light sources. As will be described in further detail below, the flood air interface 20 may comprise a planar/area-directed flood radiation array or a spherical omnidirectional flood radiation array.

A plurality of floodlight terminals 30 can be connected to a floodlight communication network as shown in fig. 3. The floodlight terminal 30 may include all intelligent mobile terminal systems with various application functions, such as a mobile phone supporting floodlight communication, a tablet computer, a vehicle-mounted floodlight terminal, and the like. The floodlight communication terminal 30 can use a small-sized broadband light radiation source and a small-sized broadband light detector to replace the conventional microwave radiation antenna, determine the scale of the radiation/reception array according to the size of the terminal, and communicate with the optical cavity and the optical base station by using floodlight radiation. In some embodiments, the floodlight terminal 30 may include modules such as a light signal amplifier, a light filtering device, and a photoelectric conversion device. The baseband system of the floodlight terminal 30 processes the floodlight signal by using the optical switching technology, and the signal is subjected to photoelectric conversion and then is sent to the terminal CPU for processing and displaying on the screen. The floodlight terminal 30 includes all intelligent mobile terminals based on floodlight signal exchange. In other embodiments, the floodlight terminal 30 may also be a conventional component operating based on current/voltage, and the electrical signal is subjected to optical-electrical conversion and then is communicated with the floodlight interface device 20 through the floodlight interface.

In the floodlight communication architecture shown in fig. 3, the system units are interconnected by a high-speed light-carrying network. For example, the floodlight base station 10 and the floodlight air interface device 20 can be interconnected through a wired optical fiber, and the floodlight air interface device 20 and the floodlight terminal 30 can be interconnected through a wireless optical path.

Fig. 4 is a schematic diagram of an optical antenna according to an exemplary embodiment, which can be applied to the floodlight interface device 20 shown in fig. 3. As shown in fig. 4, the optical antenna 40 may be a planar/area-directional floodlight radiation array (as shown in (a) of fig. 4) or a spherical omnidirectional floodlight radiation array (as shown in (b) of fig. 4), each of which may include a broadband floodlight radiation source array 42, an ultra-wide-band spectral response detection integrated array 44 and an optical pixel imaging detection integrated array 46, wherein the ultra-wide-band spectral response detection integrated array 44 and the optical pixel imaging detection integrated array 46 may be separate arrays or may be arranged as a hybrid array, as shown in fig. 4. The broad-band flood radiation source array 42 may comprise a plurality of flood radiation units 41 for emitting optical radiation, the ultra-wide-band spectral response detection integrated array 44 may comprise a plurality of broad-spectrum response detection units 43 for receiving optical radiation signals, and the optical pixel imaging detection integrated array 46 may comprise a plurality of optical pixel detection units 45 for performing imaging detection. The optical antenna 40 employs spectral response, photon counting, optical imaging, and other techniques to transmit high bandwidth and high volume data.

As shown in fig. 4, the optical antenna 40 may employ a planar directional large-scale optical radiation integrated array or a spherical omnidirectional large-scale optical radiation integrated array for externally emitting optical radiation at frequencies ranging from 3THz to 30PHz, including, for example, visible light, high-frequency terahertz waves, infrared light, ultraviolet light, and the like, for a flood connection with the terminal device 30 and/or other optical cavities. It will be appreciated that the frequency of the flood signals emitted by the radiation array and detected by the detection array may be suitably selected according to the needs of the scene, for example in the visible region of the user activity, the flood signals emitted and detected may be in a frequency range including visible light, whereas in dark environments the flood signals emitted and detected may be in a frequency range other than visible light to avoid unwanted light pollution. The nxm radiating array is composed of a plurality of single light radiation sources such as Micro-LEDs or small high broadband lasers, and an optical radiation receiving device composed of an ultra-wide spectral response detector array is arranged near the array and used for receiving floodlight signals from a terminal or an optical air interface.

The floodlight signals emitted by the floodlight radiation unit 41 can include three types of signals, the first type is floodlight signals carrying information with rapid change of luminous intensity with flicker speed exceeding the threshold value of human eyes and is generally used for VLC communication, the second type is single/multi-photon signals of point-to-multipoint communication and can be used for FLC and VLC communication, and the third type is floodlight signals emitting two-dimensional signal space flow through a light source array and can be used for implicit or explicit information transmission and can be used for FLC and VLC communication.

The ultra-wide spectral response detector 44 can be made of a floodphoton wave-absorbing flexible curved surface material, so that the selective absorption capacity (including single/multiple photons) of floodlight spectra of different frequency bands can be improved, and data transmission can be performed according to the floodlight spectral response of the different frequency bands. The method can improve the internal and external quantum efficiency and the received luminous flux, and improve the communication transmission capacity. Each of the ultra-wide spectral response detection units 43 can employ a transmission technique based on light intensity modulation, and also a transmission technique based on single photon detection, making full use of the particle dichroism of light, as will be described in detail later with respect to physical layer transmission techniques.

The optical pixel detection unit 45 can use floodlight as an information carrier, send a two-dimensional space signal stream through an optical radiation array, and then use a pixel detector array receiver of the integrated optical system for imaging detection. The detection unit 45 mainly includes an imaging photosensitive device, such as a high-sensitivity cmos (complementary Metal Oxide semiconductor) device, for example, and recovers transmission information by analyzing and processing a frame image signal to implement communication. The advantages of this approach are, for example: (a) the optical camera device of the existing mobile terminal can be conveniently utilized, and the quick engineering realization is facilitated; (b) the optical MIMO receiving capacity with large-scale independent channels is realized; (c) having multicolor acceptance; and (d) acceptance with flexible variable field angles.

The floodlight radiation and detection device in the optical air interface system may further include a plurality of optoelectronic devices such as an external modulator, an amplifier, a multiplexer, a demultiplexer, an optical switch, and an integrated transceiver, which are used to form a full optical path device or an optical path/circuit hybrid device, so as to process an optical signal or an optical-electrical hybrid signal, and implement a desired function of the optical air interface device 20, for example, an air interface function similar to that implemented by a conventional circuit in 4G or 5G. In some embodiments, a multi-point-to-multi-point transmission mode may be adopted between multiple optical air interface systems or between multiple base stations, as shown in fig. 5, where N refers to a certain air interface system or a base station system.

Fig. 6 shows a functional block diagram of a floodlight base station control system according to an exemplary embodiment of the present application. As shown in fig. 6, the floodlight base station 10 may include: the optical signal multistage amplifier 11 is used for amplifying weak floodlight signals; a modulation/demodulation module 12, which sends the modulated signal to an optical air interface for sending, or demodulates the signal received by the optical air interface to obtain corresponding data; an optical filter group 13 for filtering various required frequency bands of the ultra-wideband optical radiation; a signal encoding module 14 for encoding a channel and a source; and the signaling conversion module 15 is used for analyzing the information in the optical signal, so that the floodlight communication architecture can be compatible with a signaling protocol in a 6G mobile network and can be interconnected and intercommunicated with different network elements. It will be appreciated that in some embodiments the light modules in the floodlight base station 10 are similar in function to the circuit modules in a conventional 4G or 5G base station, but differ in their implementation, the former being based primarily on optical devices forming the processing light path and the latter being based primarily on electrical devices forming the processing circuitry.

Fig. 7 shows a functional block diagram of a floodlight terminal according to an exemplary embodiment of the present application. Unlike conventional terminals (mobile phones, vehicle-mounted mobile terminals), the signal transceiving of the floodlight terminal 30 is performed by a small-sized broadband light radiation source 31 and a broadband spectrum detector 32 on its own, and uplink and downlink channels of the broadband light radiation source 31 and the broadband spectrum detector 32 communicate with the optical cavity 20 and can transceive optical signals from 3THz to 30 PHz. In addition, as shown in fig. 7, the floodlight terminal 30 may include an optical amplifier module 33 for power and lens amplification of transmitted and received signals, an optical filtering module 34 for filtering out, for example, a floodlight spectrum frequency legal by a certain operator, and an optical-to-electrical conversion module 34, which may convert information brought by the optical signals into electrical signals so as to enable a central processor or other device of the terminal to process and display the electrical signals on a terminal screen 36, or convert electrical signals from the central processor or other device into optical signals.

A physical layer transmission technique that can be used in the above-described floodlight communication system will be described below. The transmission channel of the floodlight communication in the free space is limited by the frequency response characteristics of the transmitting and receiving ends, the spatial light field distribution, the atmospheric turbulence, the background noise, the light scattering, diffraction and reflection and other factors. The physical layer transmission modulation signal of the floodlight communication architecture comprises positive and negative amplitude modulation and complete phase information, the modulation technology comprises single carrier modulation, multi-carrier modulation, carrierless modulation, color modulation and the like, and the multiple access technology comprises orthogonal frequency division multiple access, code division multiple access, color division multiple access, non-orthogonal multiple access and the like. In some embodiments of the present application, these multiple access techniques can be applied with substantially the same principle as the conventional 4G and 5G multiple access techniques, except that the bipolar electromagnetic wave signal is converted into a unipolar real signal (i.e. optical signal) to adapt to the optical path device of the present application, the energy efficiency of the signal is not lost, and the spectrum utilization rate is high. The non-orthogonal multiple access technology based on the sparse code and the power domain breaks through the traditional mode of constructing a multi-channel mode in an orthogonal mode, introduces the non-orthogonal multi-channel and can effectively improve the frequency spectrum utilization rate.

In some embodiments of the present application, the following three physical layer transmission techniques may be employed to implement the floodlight signal transmission.

1. Intensity modulation based transmission techniques are employed. This is a communication technique that uses rapid changes in luminous intensity to carry information. In some embodiments of the application, a broadband LED or a high-broadband laser is used, the equivalent bandwidth is large, the sensitivity in a floodlight wave band is high, the interference by visible light intensity is small, and high transmission rate and communication capacity can be achieved. The transmission technology based on intensity modulation is mainly inherited to earlier researches on visible light communication, such as multicolor visible light transmission, MIMO-VLC and the like, and on the basis, the floodlight transmission problem is pertinently solved.

2. Single/multiphoton based transmission techniques are employed. The wave-particle duality of light is the physical basis for the realization of single photon detection technology. On one hand, the fluctuation of light is adopted, and the transmitting end realizes the loading of information by adjusting the power of the floodlight signal; on the other hand, since the optical power is actually a macroscopic manifestation of large-scale particle motion, the receiving end fully utilizes the particle property of light to extract the transmitted signal information in a photon counting mode. Some embodiments of the application adopt a single/multi-photon detection technology to redesign a Poisson channel under a Gaussian noise channel, model non-orthogonal multiple access systems and code division multiple access systems under the Poisson channel, solve the influence of the SPAD dead time effect on the imaging contrast of the photon technology, and obtain a design method for solving the general problem.

3. And communication is carried out by adopting a transmission technology based on optical imaging in an implicit transmission mode of pushing a two-dimensional space signal stream to a user. The transmission technology can comprise two transmission modes of non-imaging optical MIMO and imaging optical MIMO, and the full-rank characteristic of a channel matrix of the imaging optical MIMO is fully utilized, so that floodlight can carry out signal transmission in a low-illumination scene, and high data transmission performance can be obtained; meanwhile, a frame image of a receiving end can be modeled by using a mixed frame detection algorithm, so that the floodlight signal of a user is transmitted more reliably.

Some embodiments of the application also support the integration of the floodlight communication protocol and heterogeneous protocols of other networks such as radio and the like, so that the respective advantages of various networks are exerted, and better network performance is provided. The system is compatible with the existing different light sources and modulation bandwidths and the existing 802.11 radio mode, is suitable for the mixed coordination mode channel access, the detection and coexistence of the overlapped basic service sets, the high-efficiency power management design of the floodlight communication characteristic, and the safety support of the conversion or the quick session transfer process between the floodlight communication physical layer and the existing physical layer. For example, in some embodiments, the uplink of the floodlight communication system may adopt a non-visible light link (such as high-frequency terahertz light and low-frequency infrared light) harmless to human eyes and a wireless uplink in an alternating manner, and the downlink of the data may adopt a visible light link. In addition to the translation transformation from the conventional technology of the conventional wireless communication, the novel transmission technology of the photoelectric cooperation can be used in a targeted manner.

The technical solution disclosed in the present application is also characterized in the following aspects.

On one hand, the 6G network floodlight communication architecture constructed based on 6G photonics breaks through a data transmission mode of a traditional mobile communication network (2G/3G/4G/5G) taking wireless microwaves as media, floodlight radiation sources such as high-frequency terahertz light, infrared light, visible light with various colors and ultraviolet light are adopted as media of ultrahigh-rate data transmission, and a communication frequency band is expanded to 3 THz-30 PHz (frequency 3 multiplied by 10)¹²～3×10¹⁶Hz, the wavelength is 100 mu m-10 nm), which is approximately equivalent to floodlight communication spectrum resources with thirty-thousand terahertz spectrum bandwidths, provides ultrahigh-speed and ultra-large-capacity ultra-long span spectrum resources for future 6G networks, and establishes 6G photonics.

In some embodiments, in the 6G network floodlight communication architecture, a floodlight air interface (floodlight radiation), a floodlight base station (floodlight controller), and a floodlight terminal (floodlight handset) based on the 6G network may be established, so as to form a floodlight communication architecture with a wireless access rate of 100Gbps to 1Tbps or even higher.

In some embodiments, the spectrum range not only includes the visible light range, but also includes the range of invisible light such as high-frequency terahertz light waves, infrared light and ultraviolet light, and forms free-space floodlight communication. The spectral resources of visible light communications are a subset of floodlight communications. The floodlight source of the invisible light can meet various requirements between the terminal and the base station in the non-visible light communication range and in the low-light scene, and can effectively avoid unnecessary light pollution.

In some embodiments, the light radiation source device emits a floodlight radiation signal for covering the user's active areas both outdoors (street and non-street lamp areas, daytime and nighttime) and indoors (areas with and without visible light communication), forming a cellular structure cell network, and also forming a non-cellular structure coverage area according to actual needs, flexibly building a floodlight communication coverage network.

In some embodiments, the cellular network architecture of the base station system is divided into two types, one is conventional base station-centric networking and the other is new user-centric cellular networking. In the former framework, a floodlight radiation source is regarded as a cell base station, and user access and resource management are controlled through centralized scheduling of the base station; the latter architecture performs resource management with users as the center, and enables the optical signals of a plurality of floodlight radiation sources to be matched with each other with users as the center, so that the users do not sense at the edge of a 'cell' or during switching.

In some embodiments, the optical radiation source device integrates a plurality of Micro-LEDs (Light-Emitting diodes) or a single optical radiation source of a small high-bandwidth laser to form an N × M spherical omnidirectional array or a planar/area-oriented large-scale broadband flood radiation array, and the flood signal can be amplified by a lens and then covered on a certain area. Meanwhile, a detector array with ultra-wide spectral response, an optical pixel imaging detection integrated array and the like are adopted to receive floodlight signals, and the arrays form an optical antenna or a multi-antenna array for floodlight communication. The optical antenna or the multi-antenna array adopts various technologies such as spectral response, photon technology, optical imaging and the like to transmit and receive user data.

In some embodiments, the following physical layer transport techniques may be used, for example: the method adopts a transmission technology based on intensity modulation or other high-efficiency modulation, utilizes a broadband LED or a high-bandwidth laser, has larger equivalent bandwidth, high sensitivity in a floodlight wave band and less interference by visible light intensity, and can achieve very high transmission rate and communication capacity.

In some embodiments, the physical layer transport techniques may include: the method comprises the steps of redesigning a Poisson channel under a Gaussian noise channel by adopting a transmission detection technology based on Single/multiple photons, modeling a non-orthogonal multiple access system and a code division multiple access system model under the Poisson channel, solving the influence of a Single-Photon Avalanche Diode (SPAD) dead time effect on the imaging contrast of a Photon technology, and obtaining a design method for solving the general problem.

In some embodiments, the physical layer transport techniques may include: the method adopts a transmission technology based on optical imaging, comprises two transmission modes of non-imaging optical MIMO (Multiple-Input Multiple-Output) and imaging optical MIMO, fully utilizes the characteristic that the imaging optical MIMO has channel matrix full rank, can enable floodlight to carry out signal transmission in a low-illumination scene, and utilizes an algorithm of mixed frame detection to model a frame image at a receiving end.

In some embodiments, the radiation intensity of the large-scale optical radiation array can be adjusted according to the density of users, and for a hotspot access area, directional beam forming and beam shaping are performed in a targeted manner, energy is concentrated in a certain area to cover the area, and higher-speed transmission bandwidth and access capacity can be brought to the users.

In some embodiments, on the basis of inheriting LTE and 5G naming standards, concepts of 6G network flooding air interface 6G FLR (flood light Radio) and flooding base station FL-nb (flood light Node b) systems are defined, and are backward compatible with previous generations of networks (2G/3G/4G/5G).

In some embodiments, the optical base station is a processing control unit of the optical radiation signal. The optical base station is provided with a plurality of optical switching control modules, is an optical signal data switching and processing unit of a floodlight communication architecture, and has the functions of multi-stage amplification, modulation/demodulation, optical filter bank, channel/information source coding, signaling analysis and the like of optical signals of transmission symbols. The data exchanged by the floodlight base station is all based on floodlight signals, the processed data can be transmitted to an LTE eNB (evolved Node B) or a 5G gNB (next generation Node B) network through a photoelectric conversion relay, and the network is backward compatible with the existing network (2G/3G/4G/5G) and can also be transmitted to a 6G core network.

In some embodiments, the 6G network floodlight communication architecture can be connected with all intelligent mobile terminal systems (at least having functions of a floodlight communication interface and the like) having various application functions, including a mobile phone, a tablet computer, a vehicle-mounted light terminal and the like supporting floodlight communication. The floodlight communication terminal adopts a small-sized broadband light radiation source and a small-sized broadband light detector, is integrated with a traditional microwave radiation antenna and works in cooperation, and communicates with a floodlight air gap and a floodlight base station by utilizing floodlight radiation. The floodlight terminal at least comprises modules such as an optical signal amplifier, an optical filter circuit, a photoelectric conversion circuit and the like. The floodlight baseband system of the floodlight terminal can at least process floodlight signals by using an optical switching technology, and the signals are subjected to photoelectric conversion and then are transmitted to a terminal CPU for processing and are displayed on a screen.

In some embodiments, the 6G network floodlight communication architecture supports the fusion between the protocol of the floodlight communication control layer and the heterogeneous protocols of other networks such as radio, and realizes the photoelectric cooperation. Compatible with different existing light sources and modulation bandwidths and compatible with the existing 802.11 radio mode.

In some embodiments, the uplink adopts a non-visible light link (such as high-frequency terahertz light and low-frequency infrared light) harmless to human eyes and a wireless uplink in an alternating mode, and the downlink of the data can adopt a visible light link or other floodlight links.

In some embodiments, since the optical spectrum resource for transmitting the user signal includes a part of the high-frequency terahertz frequency band with optical characteristics, the optical-to-electrical conversion relay can also be used for data exchange with the terahertz base station of the 6G network, so that the floodlight communication architecture is functionally compatible with the 6G network part.

In some embodiments, indoor coverage can be performed in addition to outdoor user macro coverage. The floodlight antenna can be arranged on a fluorescent lamp in a classroom, a street lamp in a city street and an LED lamp in a home, and is applied to various visible light communication scenes such as stations, airports, docks, shops, libraries, offices and the like.

For the 6G floodlight communication system disclosed above, the inventors have conducted a great deal of laboratory validation work to prove its utility and reproducibility. Specifically, the inventor uses the infrared light, the ultraviolet light, the high-frequency terahertz light and the visible light wave bands generated by various broadband floodlight lasers to carry out indoor far/near floodlight communication, uses an optical filter bank to filter the infrared and ultraviolet floodlight wave bands in the visible floodlight in the experimental process, and verifies the floodlight communication overall architecture, the floodlight device, the physical layer transmission technology and the like. And each optical module in the floodlight base station control system is designed and constructed, and the channel access of a fusion and hybrid coordination mode between a floodlight communication architecture and a heterogeneous protocol of traditional wireless communication, photoelectric conversion, cooperation and error correction technologies between a floodlight communication physical layer and the existing physical layer and the like are verified. The results of the experiments for various communication process verifications using different floodlight bands are shown in table 1 below.

Table 1: experimental results of flood communications

Index (I)	Parameter(s)
		Rate of communication	>100G bps
Error rate	<10^-9
		Number of channels	32
Efficiency of emission	>-1dB
		Insertion loss	<-3dB
Transmitting power	<20dBm
		Sensitivity of the probe	>-27dBm

In the above embodiments of the present application, in order to realize ultra-large bandwidth and ultra-high speed data transmission, the 6G network expands the available spectrum to terahertz, and the communication capacity and bandwidth are increased to hundreds or even thousands of times. The floodlight communication architecture provided by the application is beneficial to breaking through increasingly barren spectrum resources by the future mobile communication evolution technology, so that the communication technology has a wide development space. A floodlight communication architecture based on a 6G network comprises three network elements, namely an optical air interface, an optical base station and an optical terminal, and by utilizing an optical spectrum with a large number of frequency band resources, novel integrated spectrum resources such as high-frequency terahertz (more than 3 THz), infrared light, visible light with various colors, ultraviolet light and the like are used as carriers of data signals, mobile data transmission with ultrahigh capacity and ultra-wide band can be provided, the uplink and downlink bandwidth between the terminal and the network can be expanded to 100G bps and even more than 1T bps, and the development requirement of future 6G services is fully met.

In the aspect of indoor coverage, the problems of inflexibility and inconvenience of indoor wired access and the problems of weak wireless access signals and low bandwidth can be solved. The lighting and quick response characteristics of the flood light source can realize high-quality lighting experience, high-speed communication experience and flood coverage of lighting and communication. The floodlight antenna can be arranged on a fluorescent lamp in a classroom, a street lamp in a city street and an LED lamp in a family, and is applied to various scenes such as stations, airports, docks, shops, libraries, offices and the like.

The floodlight communication has the outstanding characteristics of directional radiation, rapid attenuation, high space reuse rate and the like, and develops a brand-new spectrum resource. Mobile communication will span from high-frequency terahertz (THz) to tazzy hertz (PHz) in the future, entering the flood communication era.

The foregoing describes the general principles of the present application in conjunction with specific embodiments, however, it is noted that the advantages, effects, etc. mentioned in the present application are merely examples and are not limiting, and they should not be considered essential to the various embodiments of the present application. Furthermore, the foregoing disclosure of specific details is for the purpose of illustration and description and is not intended to be limiting, since the foregoing disclosure is not intended to be exhaustive or to limit the disclosure to the precise details disclosed.

The block diagrams of devices, apparatuses, systems referred to in this application are only given as illustrative examples and are not intended to require or imply that the connections, arrangements, configurations, etc. must be made in the manner shown in the block diagrams. These devices, apparatuses, devices, systems may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including, but not limited to," and are used interchangeably therewith. The words "or" and "as used herein mean, and are used interchangeably with, the word" and/or, "unless the context clearly dictates otherwise. The word "such as" is used herein to mean, and is used interchangeably with, the phrase "such as but not limited to".

It should also be noted that in the devices, apparatuses, and methods of the present application, the components or steps may be decomposed and/or recombined. These decompositions and/or recombinations are to be considered as equivalents of the present application.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit embodiments of the application to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.

Claims

1. A floodlight communication base station comprising a floodlight air interface device, the floodlight air interface device comprising:

the broadband floodlight radiation array comprises a plurality of floodlight radiation units and a floodlight terminal, wherein the floodlight radiation units are used for transmitting floodlight signals to the floodlight terminal in a floodlight frequency band; and

the broadband floodlight detection array comprises a plurality of broadband floodlight detection units and is used for detecting floodlight signals emitted by a floodlight terminal.

2. The floodlight communication base station of claim 1, further comprising:

the at least one stage of optical signal amplifier is used for amplifying the floodlight signal;

a modulation/demodulation module, configured to modulate a signal to be sent over an optical air interface, or demodulate a signal received over the optical air interface;

the optical filter bank is used for filtering the required frequency band of the ultra-wideband optical radiation;

the signal coding module is used for coding a channel and a signal source; and

and the signaling conversion module is used for analyzing the information in the optical signal.

3. The floodlight communication base station of claim 2, wherein the floodlight communication base station has one of two cellular network architectures:

the method comprises the following steps of (1) cellular networking taking a base station as a center, wherein a floodlight radiation source is regarded as a cell base station, and user access and resource management are controlled through centralized scheduling of the base station; and

user-centric cellular networking, wherein user-centric resource management is performed such that optical signals of a plurality of flood radiation sources are coordinated with each other user-centric.

4. The floodlight communication base station of any of claims 1-3, wherein the floodlight interface device further comprises:

an optical pixel imaging detection array includes a plurality of optical pixel detection units for performing imaging detection on a two-dimensional spatial signal stream to recover transmitted information.

5. The floodlight communication base station of claim 4, wherein the broadband floodlight detection array and the optical pixel imaging detection array are integrated into the same integrated array.

6. The floodlight communication base station of claim 4, wherein the floodlight air interface device is constructed as a planar directional array or a spherical omnidirectional array.

7. The floodlight communication base station of claim 4, wherein the floodlight air interface apparatus further comprises one or more of: optical signal power amplifiers, modems, multiplexers, demultiplexers, optical switches, and integrated transceivers.

8. The floodlight communication base station of claim 4, wherein the floodlight radiation unit is a single light radiation source comprising an LED, a micro-LED or a laser.

9. The floodlight communication base station of claim 4, wherein the broadband floodlight radiation array further comprises a free-form surface lens or a photonic crystal lens with a micro-nano structure to process the light signal emitted by the floodlight radiation unit to change the divergent light into a collimated light.

10. The floodlight communication base station of claim 4, wherein the floodlight interface device transmits and detects light signals in a range of 3THz to 30PHz comprising one or more of visible light, high frequency terahertz light waves, infrared light, and ultraviolet light.

11. The floodlight communication base of claim 10, wherein, in a visible light region of user activity, the transmitted and detected floodlight signal employs a frequency range comprising visible light, and in a dark environment, the transmitted and detected floodlight signal employs a frequency range other than visible light.

12. The floodlight communication base station of claim 4, wherein the floodlight signals emitted by the broad-band floodlight radiation array comprise one or more of:

a floodlight signal with the flashing speed exceeding the threshold value of human eyes and the luminous intensity changing rapidly;

single/multi-photon signals for point-to-multipoint communication; and

a two-dimensional signal space stream flood signal emitted by an array of light sources.

13. The floodlight communication base station of claim 4, wherein the radiation intensity of the broadband floodlight radiation array is modulated according to the user density, and energy is concentrated to a coverage area by directional beam forming and/or beam shaping.

14. The floodlight communication base station of claim 1, wherein the plurality of floodlight communication base stations perform multipoint-to-multipoint transmission therebetween.

15. The floodlight communication base station of claim 4, constructed based on 6G photonics and connected or transported to a 6G core network through an optical carrier network.

16. A floodlight communication terminal comprising:

the broadband light radiation source is used for transmitting an uplink floodlight signal;

the broadband light detector is used for receiving the downlink floodlight signal; and

and the photoelectric conversion circuit is used for performing photoelectric conversion between the optical path device and the circuit device in the floodlight communication terminal.

17. The floodlight communication terminal of claim 16, further comprising:

the optical signal amplifier is used for carrying out power amplification on the floodlight signal; and

and the light filtering module is used for filtering the floodlight signal to obtain the floodlight signal with the required frequency.

18. The floodlight communication terminal of claim 16, wherein the floodlight communication terminal communicates with a floodlight communication base station over a wireless light path.

19. The floodlight communication terminal of claim 17, wherein the floodlight communication terminal is one of a mobile phone and a vehicle-mounted mobile terminal.

20. The floodlight communication terminal of any of claims 16-19, wherein the upstream floodlight signal and the downstream floodlight signal are in the range of 3THz to 30PHz, comprising one or more of visible light, high-frequency terahertz light waves, infrared light, and ultraviolet light.

21. A floodlight communication network system comprising:

a plurality of the floodlight communication base stations of any of claims 1-15 in floodlight signal communication with the floodlight communication terminal of any of claims 16-20.

22. The floodlight communication network system of claim 21, wherein the floodlight signal available frequency band of the floodlight communication network system is in the range of 3THz to 30PHz, and the access rate is in the range of 100Gbps to 1 Tbps.

23. The floodlight communication network system of claim 21 or 22, wherein the floodlight signal of the floodlight communication network system comprises one or more of visible light, high-frequency terahertz light waves, infrared light and ultraviolet light.

24. The floodlight communication network system of claim 23, wherein in a visible light region of user activity, the floodlight communication base station operates with a frequency range comprising visible light, and in a dark environment, the floodlight communication base station operates with a frequency range other than visible light.

25. The floodlight communication network system of claim 23, constructed based on 6G photonics, the floodlight communication base station being connected or transmitted to a 6G core network through an optical carrier network.