An optical switching device, method and terminal device based on laser communication

Abstract

The present invention discloses an optical switching device, method and terminal device based on laser communication. The optical switching device includes: a beam splitting and detection module, an optical switching control module, an optoelectronic conversion module and an optical switching execution module; the beam splitting and detection module is configured to divide each laser signal into three paths after receiving the laser signals transmitted by the optical receiving antenna through N input ports; the optoelectronic conversion module is configured to convert the packet header in the second laser signal into an electrical signal after receiving the start control signal; the optical switching control module is configured to compare the required information in the electrical signal with the learned address table after learning the address table to obtain a port matching signal; the optical switching execution module is configured to match the M output ports with the N input ports according to the port matching signal, and transmit the first laser signal through N output ports among the M output ports to the optical transmitting antenna. By only converting the packet header signal in the laser signal during optoelectronic conversion, the power consumption is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of laser communication, and particularly relates to an optical switching device, method and terminal device based on laser communication. Background Art

[0002] Laser communication is one of the important means for spatial communication data transmission. Traditional laser communication has relatively in-depth research on P2P (point-to-point) communication, and relatively less research on laser communication networking. However, with the development of the economic society, the human demand for satellite Internet and deep space communication is becoming more and more urgent. This has to face the impacts of non-line-of-sight communication, channel state, etc. on laser communication. Therefore, the solution can only be to develop in the direction of networking laser communication. Two important directions in networking laser communication are respectively transmission and switching. Transmission is the aforementioned point-to-point (P2P) communication.

[0003] However, the currently known switching systems are mainly electrical switches. Even in the field of optical communication, complex operations of optical-to-electrical conversion - electrical switching - electro-optical conversion are required to achieve. And with the increase in switching rate and switching capacity, the electrical switching method also brings an exponential increase in power consumption. Not only is the power consumption of the switching chip increasing, but the contribution of the optical / electro-optical conversion module to the increase in power consumption cannot be ignored; at the same time, as the integration degree of the electrical switching chip is getting higher and higher, it faces the important problem that Moore's law is about to fail, and it is very difficult to further increase the switching rate and switching capacity. And it is very difficult to find an effective solution in the short term.

[0004] Another type of switching is optical switching. Optical switching is divided into two types: optically controlled optical switching and electrically controlled optical switching. Optically controlled optical switching is the complete form of optical switching. However, due to the limitations of current basic science and technology such as optical logic devices and optical storage devices, the engineering implementation of existing optically controlled optical switching is very difficult and the technology maturity is very low.

[0005] And electrically controlled optical switching is the optimal solution under the current basic technical conditions. There are several directions for the technical solutions that have been proposed.

[0006] In the prior art, a data center network control system based on SDN is proposed, which adopts a centralized management architecture. The SDN controller uniformly manages the forwarding of each top-of-rack switch, so as to achieve unified management of the underlying optical interconnection network resources inside the data center. However, this architecture requires each node to interact with the SDN controller in large-scale switching node applications (such as low-earth orbit constellations, etc.). This is very complex to deploy itself and also occupies resources. (At the same time, the acquisition of information depends on the top-of-rack switch, and this top-of-rack switch itself is an electrical switch and does not bring power consumption optimization.)

[0007] Another direction mainly focuses on the optical switching actuators, proposing or improving the optical switching actuators, such as a proposed WSS (Wavelength Selective Switch), an optical switch array supporting multicast, and a beam guiding optical switch. These methods focus on the improvement and optimization of the actuators in optical switching, without any relevant description on how to control the actuators.

[0008] There are also some studies that have made innovations in network information extraction, such as proposing a method for obtaining network information based on modulation format, and proposing a switching node with wavelength as the address label. These studies either have significant differences from the current IP network or have limitations in scale themselves.

[0009] Therefore, the existing technologies still need to be improved. Summary of the Invention

[0010] The main objective of the present invention is to provide an optical switching device, method, and terminal device based on laser communication, aiming to solve the problem of excessively high power consumption of electrical switching during data transmission in space communication or laser communication using large-scale satellite networking.

[0011] To achieve the above objective, the present invention adopts the following technical solutions:

[0012] An optical switching device based on laser communication, connected to an optical receiving antenna and an optical transmitting antenna, the optical switching device based on laser communication includes: a beam splitting and detection module, a delay module, an optical switching control module, an optoelectronic conversion module, and an optical switching execution module;

[0013] The optical receiving antenna, the beam splitting and detection module, the delay module, the optical switching execution module, and the optical transmitting antenna are connected in sequence, the optical switching control module is respectively connected to the beam splitting and detection module, the optoelectronic conversion module, and the optical switching execution module, and the optoelectronic conversion module is also connected to the beam splitting and detection module;

[0014] The beam splitting and detection module is configured to, after receiving the laser signals transmitted through N input ports by the optical receiving antenna, split each laser signal into three paths, transmit the first path and the second path of laser signals to the delay module and the optoelectronic conversion module respectively, and output an optical signal detection result to the optical switching control module according to the third path of laser signal;

[0015] The delay module is configured to control the first path of laser signal to reach the optical switching execution module after a preset delay time;

[0016] The optical switching control module is configured to output a start control signal to the optoelectronic conversion module according to the optical signal detection result;

[0017] After receiving the start control signal transmitted by the optical switching control module, the photoelectric conversion module converts the packet header signal in the second laser signal into an electrical signal and transmits the electrical signal to the optical switching control module;

[0018] After learning the address table, the optical switching control module also compares the required information in the electrical signal with the learned address table and transmits the obtained port matching signal to the optical switching execution module;

[0019] According to the port matching signal, the optical switching execution module matches the M output ports with the N input ports correspondingly, and transmits the first laser signal to the optical transmitting antenna through N output ports among the M output ports.

[0020] In the optical switching device based on laser communication, the beam splitting and detection module includes: a beam splitting unit and a detection unit;

[0021] The beam splitting unit is respectively connected to the optical receiving antenna, the detection unit, the photoelectric conversion module and the delay module, and the detection unit is also connected to the optical switching control module;

[0022] The beam splitting unit is used for splitting each laser signal into three laser signals, and then transmitting the first laser signal, the second laser signal and the third laser signal to the delay module, the photoelectric conversion module and the detection unit respectively; the detection unit is used for detecting the third laser signal and transmitting the optical signal detection result to the optical switching control module.

[0023] In the optical switching device based on laser communication, the optical switching control module includes: a start control unit and a learning address table unit;

[0024] The start control unit is respectively connected to the beam splitting and detection module and the photoelectric conversion module; the learning address table unit is connected to the optical switching execution module;

[0025] The start control unit is used for outputting the start control signal to the photoelectric conversion module according to the optical signal detection result to control the working state of the photoelectric conversion module; the learning address table unit is used for comparing the required information with the learned address table after learning the address table and transmitting the obtained port matching signal to the optical switching execution module.

[0026] In the optical switching device based on laser communication, the optical switching control module further includes: a timing unit; the timing unit is connected to the photoelectric conversion module;

[0027] The timing unit is used to start timing after the optoelectronic conversion module starts to work, and output a first stop control signal to the optoelectronic conversion module when the timing time reaches a preset timing time.

[0028] In the optical switching device based on laser communication, the optical switching control module further includes: a counting unit; the counting unit is connected to the optoelectronic conversion module;

[0029] The counting unit is used to start counting after the optoelectronic conversion module starts to work, and output a second stop control signal to the optoelectronic conversion module when the counting value reaches a preset counting threshold.

[0030] In the optical switching device based on laser communication, the required information includes: source MAC address, destination MAC address, protocol type, source IP and destination IP; both M and N are positive integers greater than or equal to 1, and M is greater than or equal to N.

[0031] In the optical switching device based on laser communication, the optical switching control module is further used to establish and maintain the address table.

[0032] An optical switching method based on laser communication, the optical switching method based on laser communication is applicable to the optical switching device based on laser communication as described above, and the optical switching method based on laser communication includes the following steps:

[0033] After the beam splitting unit receives the laser signals transmitted by the optical receiving antenna through N input ports, it divides each laser signal into three laser signals, and transmits the first laser signal, the second laser signal, and the third laser signal to the delay module, the optoelectronic conversion module, and the detection unit respectively;

[0034] The detection unit detects the third laser signal and transmits the optical signal detection result to the start control unit;

[0035] The start control unit outputs a start control signal to the optoelectronic conversion module according to the optical signal detection result to control the working state of the optoelectronic conversion module;

[0036] After the optoelectronic conversion module starts to work according to the start control signal, it converts the packet header signal in the second laser signal into an electrical signal and transmits the electrical signal to the learning address table unit;

[0037] After the learning address table unit learns the address table, it compares the required information in the electrical signal with the learned address table and transmits the obtained port matching signal to the optical switching execution module;

[0038] The delay module controls the first laser signal to reach the optical switching execution module after a preset delay time; wherein, the preset delay time is the interval time from when the detection unit starts to detect the third laser signal to when the optical switching execution module completes the port matching process;

[0039] The optical switching execution module matches the M output ports to the N input ports according to the port matching signal, and transmits the first laser signal to the optical transmitting antenna through N output ports among the M output ports.

[0040] In the optical switching method based on laser communication, the optical switching method based on laser communication further includes:

[0041] After the optoelectronic conversion module starts to work, the timing unit starts timing;

[0042] When the timing time reaches the preset timing time, the timing unit outputs a first stop control signal to the optoelectronic conversion module;

[0043] The optoelectronic conversion module stops running according to the first stop control signal.

[0044] In the optical switching method based on laser communication, the optical switching method based on laser communication further includes:

[0045] After the optoelectronic conversion module starts to work, the counting unit starts counting;

[0046] When the counting value reaches the preset counting threshold, the counting unit outputs a second stop control signal to the optoelectronic conversion module;

[0047] The optoelectronic conversion module stops running according to the second stop control signal.

[0048] In the optical switching method based on laser communication, the steps of the beam splitting unit receiving the laser signal transmitted through the N input ports by the optical receiving antenna, splitting each laser signal into three laser signals, and transmitting the first laser signal, the second laser signal, and the third laser signal to the delay module, the optoelectronic conversion module, and the detection unit respectively specifically include:

[0049] After the optical receiving antenna receives the laser signal, it transmits the laser signal to the beam splitting unit through the N input ports;

[0050] The beam splitting unit splits each laser signal into the three laser signals, and transmits the first laser signal, the second laser signal, and the third laser signal to the delay module, the optoelectronic conversion module, and the detection unit respectively.

[0051] In the optical switching method based on laser communication, after the learning address table unit learns the address table, the steps of comparing the required information in the electrical signal with the learned address table and transmitting the obtained port matching signal to the optical switching execution module include:

[0052] After the start control unit analyzes the source address in the packet header signal, it establishes a mapping relationship between the source address and the N input ports, and writes the mapping relationship into the address table;

[0053] After the start control unit analyzes the destination address in the packet header signal, it compares the destination address with the address table to obtain the port matching signal, and transmits the port matching signal to the optical switching execution module.

[0054] An optical switching terminal device based on laser communication includes a PCB board, and the above-mentioned optical switching device based on laser communication is arranged on the PCB board.

[0055] Compared with the prior art, an optical switching device, method and terminal device based on laser communication provided by the present invention, the optical switching device includes: a beam splitting and detection module, an optical switching control module, an optoelectronic conversion module and an optical switching execution module; the beam splitting and detection module is used for receiving the laser signal transmitted by the optical receiving antenna through the N input ports and splitting each laser signal into three paths; the optoelectronic conversion module is used for converting the packet header in the second laser signal into an electrical signal after receiving the start control signal; the optical switching control module is used for comparing the required information in the electrical signal with the learned address table after learning the address table to obtain the port matching signal; the optical switching execution module is used for corresponding the M output ports to match the N input ports according to the port matching signal, and transmitting the first laser signal through the N output ports among the M output ports to the optical transmitting antenna. By only converting the packet header signal in the laser signal during optoelectronic conversion, the power consumption is reduced. Brief Description of the Drawings

[0056] Figure 1 It is a structural block diagram of the optical switching device based on laser communication provided by the present invention;

[0057] Figure 2 It is an architecture diagram of a network system composed of laser switching nodes provided by the present invention;

[0058] Figure 3 It is an architecture diagram of the optical switching device based on laser communication provided by the present invention;

[0059] Figure 4 It is a flowchart of a preferred embodiment of the optical switching method based on laser communication provided by the present invention;

[0060] Figure 5 Flow chart of step S100 in the preferred embodiment of the optical switching method based on laser communication provided by the present invention;

[0061] Figure 6 Flow chart of step S500 in the preferred embodiment of the optical switching method based on laser communication provided by the present invention;

[0062] Figure 7 Flow chart of another embodiment of the optical switching method based on laser communication provided by the present invention;

[0063] Figure 8 Flow chart of still another embodiment of the optical switching method based on laser communication provided by the present invention.

[0064] Reference numerals: 10: optical switching device based on laser communication; 20: optical receiving antenna; 30: optical transmitting antenna; 11: beam splitting and detection module; 111: beam splitting unit; 112: detection unit; 12: delay module; 13: optical switching control module; 131: start control unit; 132: learning address table unit; 133: timing unit; 134: counting unit; 14: optoelectronic conversion module; 15: optical switching execution module. Detailed implementation manners

[0065] To make the objectives, technical solutions and effects of the present invention clearer and more definite, the present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0066] Those skilled in the art of the present technology can understand that unless specifically stated otherwise, the singular forms "a", "an", "the" and "said" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the specification of the present invention means the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or their groups. It should be understood that when we say that an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any unit and all combinations of one or more related listed items.

[0067] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0068] An optical switching device, method and terminal device based on laser communication provided by the present invention. In the present invention, the splitting and detection module receives N paths of the laser signals transmitted by the optical receiving antenna, and divides each path of the laser signals into three paths, which are respectively used for laser communication, optoelectronic conversion and laser signal detection. Then, the result of the laser signal detection is used to control the normal operation of the optoelectronic conversion module, and the port matching signal is obtained by looking up the address table for the laser signals after optoelectronic conversion. Finally, the optical switching execution module matches M output ports corresponding to the N input ports according to the port matching signal, so that the first path of laser signal is transmitted to the optical transmitting antenna through the N output ports, thereby realizing the logical control of optoelectronic conversion. At the same time, since only the packet header or frame header is converted during optoelectronic conversion, the functional consumption during optoelectronic conversion is effectively saved.

[0069] The design scheme of the optical switching device based on laser communication will be described below through specific exemplary embodiments. It should be noted that the following embodiments are only used to explain the technical solutions of the invention and are not specifically limited:

[0070] Please refer to Figure 1 An optical switching device 10 based on laser communication provided by the present invention is connected to an optical receiving antenna 20 and an optical transmitting antenna 30. The optical switching device 10 based on laser communication includes: a splitting and detection module 11, a delay module 12, an optical switching control module 13, an optoelectronic conversion module 14 and an optical switching execution module 15;

[0071] The optical receiving antenna 20, the splitting and detection module 11, the delay module 12, the optical switching execution module 15 and the optical transmitting antenna 30 are connected in sequence. The optical switching control module 13 is respectively connected to the splitting and detection module 11, the optoelectronic conversion module 14 and the optical switching execution module 15. The optoelectronic conversion module 14 is also connected to the splitting and detection module 11;

[0072] The beam splitting and detection module 11 is configured to receive the laser signals transmitted through N input ports by the optical receiving antenna 20, split each laser signal into three paths, transmit the first laser signal and the second laser signal to the delay module 12 and the photoelectric conversion module 14 respectively, and output an optical signal detection result to the optical switching control module 13 according to the third laser signal;

[0073] The delay module 12 is configured to control the first laser signal to reach the optical switching execution module 15 after a preset delay time;

[0074] The optical switching control module 13 is configured to output a start control signal to the photoelectric conversion module 14 according to the optical signal detection result; the photoelectric conversion module 14 is configured to convert the packet header signal in the second laser signal into an electrical signal after receiving the start control signal transmitted by the optical switching control module 13, and transmit the electrical signal to the optical switching control module 13;

[0075] The optical switching control module 13 is further configured to compare the required information in the electrical signal with the learned address table after learning the address table, and transmit the obtained port matching signal to the optical switching execution module 15; wherein, the required information includes: source MAC address, destination MAC address, protocol type, source IP and destination IP. In another implementation, the wavelength can also be used as the address to bind with the node.

[0076] The optical switching execution module 15 is configured to match the M output ports with the N input ports according to the port matching signal, and transmit the first laser signal to the optical transmitting antenna 30 through N output ports among the M output ports. Both M and N are positive integers greater than or equal to 1, and M is greater than or equal to N. Wherein, the optical receiving antenna 20 and the optical transmitting antenna 30 can be transceiving integrated antennas, and the specifications can be the same or different, both belonging to an optical terminal antenna; or they can be optical receiving antenna 20 and optical transmitting antenna 30 with separate functions.

[0077] Specifically, first refer to Figure 2 , Figure 2 shown is a network system composed of laser switching nodes, including multiple laser switching nodes, laser channels (optical paths or circuits) between the switching nodes, and user terminals or data sources not shown in the figure. The user terminals or data sources are connected to the laser switching nodes. In the figure, only 4 input / output ports on each laser switching node are taken as an example, and the actual number of ports can be arbitrary, and the connections between nodes are also determined arbitrarily according to the actual networking requirements. User terminals or data sources connected under any two laser switching nodes in this system can be connected and communicate through this network system.

[0078] One implementation mode in the present invention is that each internal input optical path corresponds to an external input node (for example, if Figure 2 in each switching node is not directly connected to the surrounding 4 nodes, then it is stipulated that these surrounding 4 nodes correspond to I 1 ~I 4 correspond, or are connected), the positions of each node can be changed, that is to say, the topological relationship between each node can be changed, but the corresponding relationship between the external node and the internal input optical path is unique at any time.

[0079] Another implementation mode is that the optical signals received by the optical antenna are wavelength-division multiplexed, and after passing through the wavelength division system, the wavelengths correspond one-to-one with the internal input optical paths (for example, for 4-wavelength wavelength-division multiplexing, λ 1 after demultiplexing, it is input into I 1 , and the other three wavelengths are the same), that is, after wavelength-division multiplexing, each wavelength corresponds to an input optical path.

[0080] And each of the laser switching nodes is the optical switching device 10 based on laser communication in the present invention, and its specific architecture diagram is as Figure 3 shown, where Figure 3 the O / E in is the optoelectronic conversion module 14, the detection data is the detection result of the optical signal, and the delay module 12 includes a time delay device / delay device or a delay optical fiber. Figure 3 The optical switching device 10 based on laser communication in can only be simplex communication, from the optical receiving antenna 20 to the optical transmitting antenna 30. However, when the same module is connected to the optical transmitting antenna 30 at one end and the optical receiving antenna 20, that is, if the circuits on both sides of the optical switching control module 13 and the optical switching execution module 15 are the same, the improved optical switching device 10 based on laser communication can achieve duplex communication and can realize the transmission of laser signals in any direction between the optical receiving antenna 20 and the optical transmitting antenna 30.

[0081] In this embodiment, it is exemplified that each optical switching device 10 based on laser communication is connected to the optical receiving antenna 20 and the optical transmitting antenna 30. After receiving the laser signal through the optical receiving antenna 20, the laser signal is coupled into N internal input optical paths I N and continues to be transmitted to the beam splitting and detection module 11; then, the beam splitting and detection module 11 divides each laser signal into three paths, and respectively transmits the first laser signal and the second laser signal to the delay module 12 and the optoelectronic conversion module 14.

[0082] It should be noted that in this embodiment, taking three paths as an example, it can also be at least three paths. And in this embodiment, when divided into three paths, it is not evenly divided into three paths. The one that transmits data is the one with the highest power (the first laser signal) that is transmitted to the optical switching execution module 15 through the delay module 12, without affecting the transmission; the optical power of the last path (the third laser signal) is the smallest, and the sensor can capture whether there is light or not. In necessary cases, a power amplifier can be added to each optical path. For example, when multiple laser switching nodes are connected, since the splitting of each path causes the transmitted optical power to gradually attenuate, a power amplifier can be added to the output of each path.

[0083] Secondly, the delay module 12 performs a delay operation on the first laser signal so as to control the first laser signal to reach the optical switching execution module 15 after a preset delay time. The optical switching control module 13 first outputs the start control signal to the optoelectronic conversion module 14 according to the optical signal detection result, and the optoelectronic conversion module 14 only converts the packet header signal or frame header signal in the second laser signal into the electrical signal and transmits the electrical signal to the optical switching control module 13 after receiving the start control signal transmitted by the optical switching control module 13.

[0084] Furthermore, after the optical switching control module 13 learns the address table, that is, after the optical switching control module 13 obtains the packet header information from the electrical signal, it compares the required information in the electrical signal with the learned address table: to obtain the port matching signal, that is, to match the input port with the output port, so as to judge from which port the laser data will finally be output. If the destination address is not in the address table, it is judged to output to all ports, and according to the communication protocol between the optical switching control module 13 and the optical switching execution module 15 (the internal private protocol between the optical switching control module 13 and the optical switching execution module 15), the obtained port matching signal (a configuration signal) is sent to the optical switching execution module 15 for configuration. At this time, the delay module 12 just controls the first laser signal to reach the optical switching execution module 15 after the preset delay time;

[0085] Finally, the optical switching execution module 15 matches the M output ports with the N input ports according to the port matching signal (both M and N are positive integers greater than or equal to 1, and M is greater than or equal to N). For example, Figure 3 the input I and output O in 1 / I 2 / I 3 / I 4 are respectively connected to O 1 / O2 / O 3 / O 4 , or other connection sequences, or I 1 / I 2 / I 3 / I 4 Connect O 2 / O 3 / O 1 / O 4 , or other sequences, and transmit the first laser signal through N output ports among the M output ports to the optical transmitting antenna 30.

[0086] Among them, since the optical switching execution module 15 is only a module that completes the final switching action, the optical switching execution module 15 can be a MEMS (Micro-Electro-Mechanical System, also called microelectronic mechanical system, microsystem, micromachine, etc., referring to high-tech devices with dimensions in millimeters or even smaller), LCOS (Liquid Crystal on Silicon, that is, liquid crystal on silicon, also called silicon-based liquid crystal, which is a matrix liquid crystal display device based on the reflection mode and very small in size), an optical switch matrix composed of 2x2 optical switches, etc.

[0087] In the present invention, after each laser signal is divided into three paths, detection, transmission, and signal control are respectively performed, so as to operate the control mechanism according to the detection results, and finally control the transmission of the laser signal, thereby realizing the optical logic operation of the optoelectronic conversion mechanism. At the same time, since only the packet header or frame header information of the laser signal is transmitted during transmission, the power consumption of the electrical switch can be effectively saved. And the optical switching device 10 based on laser communication in the present invention can effectively combine with the current IP network to achieve the effect of smooth evolution. It can also effectively support the requirements of large-scale satellite networking.

[0088] Furthermore, please continue to refer to Figure 1 , the beam splitting and detection module 11 includes: a beam splitting unit 111 and a detection unit 112;

[0089] The beam splitting unit 111 is respectively connected to the optical receiving antenna 20, the detection unit 112, the optoelectronic conversion module 14, and the delay module 12, and the detection unit 112 is further connected to the optical switching control module 13;

[0090] The optical splitting unit 111 is configured to split each path of the laser signal into three paths of laser signals, and then transmit the first path of laser signal, the second path of laser signal, and the third path of laser signal to the delay module 12, the photoelectric conversion module 14, and the detection unit 112 respectively; the detection unit 112 is configured to detect the third path of laser signal and transmit the optical signal detection result to the optical switching control module 13.

[0091] Specifically, after the optical receiving antenna 20 receives the laser signal, the laser signal is split into N paths and transmitted to the optical splitting unit 111. Then, the optical splitting unit 111 splits each path of the laser signal into three paths of laser signals, and transmits the first path of laser signal, the second path of laser signal, and the third path of laser signal to the delay module 12, the photoelectric conversion module 14, and the detection unit 112 respectively. Then, the detection unit 112 detects the third path of laser signal to detect the presence of an optical signal (the second path of laser signal), obtains the optical signal detection result, and transmits the optical signal detection result to the optical switching control module 13.

[0092] In the present invention, each path of the input laser signal is split by the optical splitting unit 111. Then, the detection unit 112 detects one path of the laser signal, so that the optical switching control module 13 starts the photoelectric conversion module 14 according to the output optical signal detection result indicating the presence of an optical signal, thereby realizing that the photoelectric conversion module 14 starts to work normally only when an optical signal is detected, effectively reducing the standby power consumption.

[0093] Furthermore, the optical switching control module 13 includes: a start control unit 131 and a learned address table unit 132;

[0094] The start control unit 131 is respectively connected to the optical splitting and detection module 11 and the photoelectric conversion module 14; the learned address table unit 132 is connected to the optical switching execution module 15;

[0095] The start control unit 131 is configured to output a start control signal to the photoelectric conversion module 14 according to the optical signal detection result to control the working state of the photoelectric conversion module 14; the learned address table unit 132 is configured to compare the required information with the learned address table after learning the address table, and transmit the obtained port matching signal to the optical switching execution module 15. Wherein, the optical switching control module 13 is further configured to establish and maintain the address table.

[0096] Specifically, after the detection unit 112 detects the third laser signal to obtain the optical signal detection result, the detection unit 112 sends the optical signal detection result to the start control unit 131; then, the start control unit 131 outputs the start control signal to the optoelectronic conversion module 14 according to the optical signal detection result to control the working state of the optoelectronic conversion module 14.

[0097] That is, when the start control unit 131 receives the optical signal detection result indicating the presence of the laser signal sent by the detection unit 112, the start control unit 131 outputs the start control signal to the optoelectronic conversion module 14 according to the optical signal detection result indicating the presence of the optical signal. The optoelectronic conversion module 14 then starts or exits the sleep state according to the start control signal block. If the optical signal detection result indicates the absence of the second laser signal, the start control unit 131 outputs the sleep control signal to the optoelectronic conversion module 14, and the optoelectronic conversion module 14 then enters the sleep state according to the sleep control signal block, thereby effectively realizing the start control unit 131 controlling the working state of the optoelectronic conversion module 14 according to the optical signal detection result.

[0098] Furthermore, after the learning address table unit 132 learns the address table, that is, after obtaining the required information in the electrical signal, it compares the required information with the learned address table to obtain the port matching signal, and transmits the port matching signal to the optical switching execution module 15, thereby realizing comparing the required information in the electrical signal converted from the second laser signal with the learned address table to obtain the port matching signal, so that the optical switching execution module 15 matches the input and output interfaces according to the port matching signal.

[0099] Furthermore, the optical switching control module 13 further includes: a timing unit 133; the timing unit 133 is connected to the optoelectronic conversion module 14;

[0100] The timing unit 133 is used to start timing after the optoelectronic conversion module 14 starts working, and output the first stop control signal to the optoelectronic conversion module 14 when the timing time reaches the preset timing time. Among them, the timing unit 133 includes a timer.

[0101] Specifically, in another embodiment, after the photoelectric conversion module 14 is started according to the start control signal block, the photoelectric conversion module 14 begins to convert the optical signal into an electrical signal. At the same time, the timing unit 133 (timer) starts timing. When the timing time reaches the preset timing time, the timing unit 133 outputs the first stop control signal to the photoelectric conversion module 14 to control the photoelectric conversion module 14 to stop running or enter the sleep state. That is, when the photoelectric conversion module 14 does not receive an optical signal within the specified time T1 (preset timing time), the photoelectric conversion module 14 enters the sleep state or the stop state according to the first stop control signal output by the timing unit 133, and at the same time, the timer is reset or cleared.

[0102] In the present invention, by setting the timing unit 133 for timing, when the timing time reaches the preset timing time, the photoelectric conversion module 14 is controlled to stop running or enter the sleep state, so that if no optical signal is received within the preset timing time, the photoelectric conversion module 14 is controlled to sleep or stop running, further saving power consumption.

[0103] Furthermore, in another embodiment provided by the present invention, between the packet header signal or the frame header signal and the payload in the second laser signal, a period of no optical signal or a regular signal combination is added. Similarly, the initial state of the photoelectric conversion module 14 is in the sleep state. When the detection unit 112 detects that there is an optical signal transmission on the input optical path, the photoelectric conversion module 14 is immediately triggered to exit the sleep state and begins to convert the optical signal into an electrical signal. When the photoelectric conversion module 14 does not receive an optical signal or receives a specified combination of optical signals within the specified time T1, it enters the sleep state.

[0104] Furthermore, the optical switching control module 13 further includes: a counting unit 134; the counting unit 134 is connected to the photoelectric conversion module 14;

[0105] The counting unit 134 is used to start counting after the photoelectric conversion module 14 starts working, and when the counting value reaches the preset counting threshold, output the second stop control signal to the photoelectric conversion module 14. Among them, the counting unit 134 includes a counter.

[0106] Specifically, in another embodiment, after the photoelectric conversion module 14 is started according to the start control signal block, the photoelectric conversion module 14 begins to convert the optical signal into an electrical signal, and at the same time, the counting unit 134 (counter) starts to count. Similarly, when the counted value reaches the preset counting threshold, the second stop control signal is output to the photoelectric conversion module 14, and at the same time, the counter is cleared, so as to control the photoelectric conversion module 14 to stop operating or enter a sleep state.

[0107] That is, when the counted value reaches the threshold N1 (preset counting threshold), the photoelectric conversion module 14 enters the sleep state or the stop state according to the second stop control signal output by the counting unit 134, thereby realizing that after reaching the preset counting threshold, the photoelectric conversion module 14 is immediately controlled to enter the sleep state or stop operating, which can also save power consumption. It should be noted that the second stop control signal and the second stop control signal are the same control signal for controlling the photoelectric conversion module 14 to stop operating or enter the sleep state. Here, it is only for distinguishing whether it is output by the timing unit 133 or the counting unit 134.

[0108] For a better understanding of the present invention, the following will be combined with Figure 1 and Figure 3 to describe in detail the working principle of the optical switching device 10 based on laser communication of the present invention:

[0109] First, after the optical receiving antenna 20 receives the laser signal, the laser signal is divided into N paths and transmitted to the beam splitting unit 111; then, the beam splitting unit 111 divides each path of the laser signal into three paths, and transmits the first path of the laser signal, the second path of the laser signal, and the third path of the laser signal to the delay module 12, the photoelectric conversion module 14, and the detection unit 112 respectively; the detection unit 112 then detects the third path of the laser signal and transmits the optical signal detection result to the start control unit 131.

[0110] Secondly, the delay module 12 performs a delay operation on the first path of the laser signal so as to control the first path of the laser signal to reach the optical switching execution module 15 after a preset delay time, and the start control unit 131 outputs the start control signal to the photoelectric conversion module 14 according to the optical signal detection result; furthermore, the photoelectric conversion module 14 only converts the packet header signal or the frame header signal in the second path of the laser signal into the electrical signal after receiving the start control signal transmitted by the start control unit 131, and transmits the electrical signal to the optical switching control module 13.

[0111] Next, after the optical switching control module 13 learns the address table, that is, after the optical switching control module 13 obtains the packet header information of the electrical signal output, it compares the required information in the electrical signal with the learned address table, and transmits the obtained port matching signal (a configuration signal) to the optical switching execution module 15. At this time, the delay module 12 just controls the first laser signal to be delayed by the preset delay time and reach the optical switching execution module 15 at the same time; finally, the optical switching execution module 15 matches the M output ports with the N input ports according to the port matching signal, and then transmits the first laser signal through N output ports among the M output ports to the optical transmitting antenna 30.

[0112] Please refer to Figure 4 , an optical switching method based on laser communication provided by the present invention. The optical switching method based on laser communication is applicable to the optical switching device 10 based on laser communication as described above. The optical switching method based on laser communication includes the following steps:

[0113] S100. After the beam splitting unit 111 receives the laser signals transmitted by the optical receiving antenna 20 through the N input ports, it divides each laser signal into three laser signals, and transmits the first laser signal, the second laser signal, and the third laser signal to the delay module 12, the photoelectric conversion module 14, and the detection unit 112 respectively.

[0114] Specifically, after the optical receiving antenna 20 receives the laser signals, it divides the laser signals into N paths and transmits them to the beam splitting unit 111; then, the beam splitting unit 111 divides each laser signal into three paths, and transmits the first laser signal, the second laser signal, and the third laser signal to the delay module 12, the photoelectric conversion module 14, and the detection unit 112 respectively, so as to perform detection, electrical signal conversion, and forwarding operations respectively according to the split laser signals, and finally realize the optical logic operation of photoelectric conversion, breaking the limitation that the optical logic operation is not yet mature at the present stage.

[0115] Furthermore, please refer to Figure 5 , the step of S100, where the beam splitting unit 111 receives the laser signals transmitted by the optical receiving antenna 20 through the N input ports, divides each laser signal into three laser signals, and transmits the first laser signal, the second laser signal, and the third laser signal to the delay module 12, the photoelectric conversion module 14, and the detection unit 112 respectively, specifically includes:

[0116] S110. After the optical receiving antenna 20 receives the laser signals, it transmits the laser signals to the beam splitting unit 111 through the N input ports;

[0117] S120. The beam splitting unit 111 splits each path of the laser signal into the three paths of laser signals, and transmits the first path of laser signal, the second path of laser signal, and the third path of laser signal to the delay module 12, the photoelectric conversion module 14, and the detection unit 112 respectively.

[0118] Specifically, after the optical receiving antenna 20 receives the laser signal, the optical receiving antenna 20 transmits the laser signal to the beam splitting unit 111 through the N input ports. Then, the beam splitting unit 111 splits each path of the laser signal into three paths, and transmits the first path of laser signal, the second path of laser signal, and the third path of laser signal to the delay module 12, the photoelectric conversion module 14, and the detection unit 112 respectively. These three paths are respectively used for: one path is finally output to the optical switching execution module 15 after passing through the delay module 12, one path is output to the photoelectric conversion module 14, and one path is output to the detection unit 112. The detection unit 112 is mainly used to quickly judge the presence or absence of the optical signal on the input optical path, and send the detection result (optical signal detection result) to the optical switching control module 13.

[0119] Further, please continue to refer to Figure 4 S200. The detection unit 112 detects the third path of laser signal, and transmits the optical signal detection result to the start control unit 131;

[0120] Specifically, after the beam splitting unit 111 transmits the first path of laser signal, the second path of laser signal, and the third path of laser signal to the delay module 12, the photoelectric conversion module 14, and the detection unit 112 respectively, the detection unit 112 detects the third path of laser signal to detect the presence of an optical signal (the second path of laser signal), and transmits the obtained optical signal detection result to the start control unit 131, thereby realizing the detection of one path of laser signal after reflection, so as to finally control the working state of the photoelectric conversion module 14 according to the optical signal detection result.

[0121] Further, S300. The start control unit 131 outputs a start control signal to the photoelectric conversion module 14 according to the optical signal detection result to control the working state of the photoelectric conversion module 14.

[0122] Specifically, after the detection unit 112 sends the optical signal detection result to the start control unit 131, the start control unit 131 outputs the start control signal to the photoelectric conversion module 14 according to the optical signal detection result to control the working state of the photoelectric conversion module 14; that is, when the start control unit 131 receives the optical signal detection result of the presence of the laser signal sent by the detection unit 112, the start control unit 131 outputs the start control signal to the photoelectric conversion module 14 according to the optical signal detection result of the presence of the optical signal, so that the photoelectric conversion module 14 starts or exits the sleep state according to the start control signal block, thus finally realizing that when the detection unit 112 detects the optical signal detection result of the presence of the optical signal, the start control unit 131 controls the photoelectric conversion module 14 to start or exit the sleep state.

[0123] Further, in S400, after the photoelectric conversion module 14 starts to work according to the start control signal, it converts the packet header signal in the second laser signal into an electrical signal and transmits the electrical signal to the learning address table unit 132.

[0124] Specifically, when the start control unit 131 outputs the start control signal to the photoelectric conversion module 14 according to the optical signal detection result, the photoelectric conversion module 14 only converts the packet header signal or the frame header signal in the second laser signal into the electrical signal after receiving the start control signal transmitted by the start control unit 131, and then transmits the electrical signal to the learning address table unit 132, so that the learning address table unit 132 learns the required information in the electrical signal, thus realizing that only the packet header signal or the frame header signal in the laser signal is converted into the electrical signal, and the packet payload is not subjected to photoelectric conversion, because the proportion of the packet header or the frame header in all data is small, so as to achieve the purpose of reducing power consumption.

[0125] Further, in S500, after the learning address table unit 132 learns the address table, it compares the required information in the electrical signal with the learned address table and transmits the obtained port matching signal to the optical switching execution module 15.

[0126] Specifically, after transmitting the electrical signal to the learning address table unit 132, the learning address table unit 132 learns the address table, that is, the learning address table unit 132 obtains the required information in the electrical signal, and compares the required information in the electrical signal with the learned address table: obtaining the port matching signal to determine from which port the laser data is finally output. If the destination address is not in the address table, it is determined to output to all ports, and then the obtained port matching signal is transmitted to the optical switching execution module 15, thereby realizing learning of the electrical signal after the header signal in the second laser signal is converted, comparing it with the learned address table, and determining from which port the laser data is finally output according to the comparison result.

[0127] Furthermore, please refer to Figure 6 , S500. After the learning address table unit 132 learns the address table, the steps of comparing the required information in the electrical signal with the learned address table and transmitting the obtained port matching signal to the optical switching execution module 15 include:

[0128] S510. After the start control unit 131 analyzes the source address in the header signal, it establishes a mapping relationship between the source address and the N input ports, and writes the mapping relationship into the address table.

[0129] S520. After the start control unit 131 analyzes the destination address in the header signal, it compares the destination address with the address table to obtain the port matching signal, and transmits the port matching signal to the optical switching execution module 15.

[0130] Specifically, after transmitting the electrical signal to the learning address table unit 132, the learning address table unit 132 learns the address table, that is, the learning address table unit 132 obtains the source address (required information) in the header or frame header information in the electrical signal. Then, it establishes a one-to-one mapping relationship between the source address and the N input ports, and writes the mapping relationship into the address table / address library. Secondly, the start control unit 131 analyzes the destination address in the header signal, and compares the destination address with the address table to obtain the port matching signal, so as to determine from which port the laser data is finally output, and then transmits the port matching signal to the optical switching execution module 15, thereby realizing obtaining the port matching signal by first establishing the address table and then directly searching for the destination address in the header signal, that is, so as to be able to determine from which port the laser data is finally output according to the port matching signal.

[0131] Further, please continue to refer to Figure 4, S600. The delay module 12 controls the first laser signal to reach the optical switching execution module 15 after a preset delay time; wherein, the preset delay time is the interval time from when the detection unit 112 starts to detect the third laser signal to when the optical switching execution module 15 completes the port matching process.

[0132] Specifically, after the optical splitting unit 111 transmits the first laser signal to the delay module 12, the delay module 12 controls the first laser signal to perform a delay operation, so that the first laser signal is controlled to reach the optical switching execution module 15 after a preset delay time, thereby ensuring that after the optical switching control module 13 completes the control of the optical switching execution module 15 and remains stable, the first laser signal reaches the optical switching execution module 15. That is, when the port matching signal is transmitted to the optical switching execution module 15, the first laser signal reaches the optical switching execution module 15, thereby realizing the time delay control of the first laser signal.

[0133] Further, S700. The optical switching execution module 15 corresponds M output ports to match the N input ports according to the port matching signal, and transmits the first laser signal to the optical transmitting antenna 30 through N output ports among the M output ports. Wherein, both M and N are positive integers greater than or equal to 1, and M is greater than or equal to N.

[0134] Specifically, after the optical switching control module 13 transmits the obtained port matching signal to the optical switching execution module 15, the optical switching execution module 15 corresponds M output ports to match the N input ports according to the port matching signal (both M and N are positive integers greater than or equal to 1, and M is greater than or equal to N), that is, connects the M input ports I and the N output ports O according to the port matching signal issued by the control module. For example, I 1 / I 2 / I 3 / I 4 are respectively connected to O 1 / O 2 / O 3 / O 4 , or other connection sequences, or I 1 / I 2 / I 3 / I 4 is connected to O 2 / O 3 / O 1 / O 4, or other sequences, and finally, the first laser signal is transmitted to the optical transmitting antenna 30 through N output ports among the M output ports, thereby realizing the matching of the input port and the output port according to the comparison result between the required information in the electrical signal and the learned address table, that is, the port matching signal, so that after the second laser signal can be accurately transmitted to the optical transmitting antenna 30, it is sent out.

[0135] Furthermore, please refer to Figure 7 , the optical switching method based on laser communication further includes:

[0136] A10. After the optoelectronic conversion module 14 starts to work, the timing unit 133 starts timing;

[0137] A20. When the timing time reaches the preset timing time, the timing unit 133 outputs a first stop control signal to the optoelectronic conversion module 14;

[0138] A30. The optoelectronic conversion module 14 stops operating according to the first stop control signal.

[0139] Specifically, in another embodiment of the present invention, after the optoelectronic conversion module 14 is started according to the start control signal block, the optoelectronic conversion module 14 starts to convert the optical signal into an electrical signal, and at the same time the timing unit 133 (timer) starts timing. When the timing time reaches the preset timing time, the timing unit 133 outputs the first stop control signal to the optoelectronic conversion module 14 to control the optoelectronic conversion module 14 to stop operating or enter a sleep state, that is, when the optoelectronic conversion module 14 does not receive an optical signal within the specified time T1 (preset timing time), the optoelectronic conversion module 14 enters a sleep state or a stop state according to the first stop control signal output by the timing unit 133, and at the same time the timer is reset or cleared.

[0140] In the present invention, by setting the timing unit 133 for timing and controlling the optoelectronic conversion module 14 to stop operating or enter a sleep state when the timing time reaches the preset timing time, it is realized that if no optical signal is received within the preset timing time, the optoelectronic conversion module 14 is controlled to enter a sleep state or stop operating, further saving power consumption.

[0141] Furthermore, please refer to Figure 8 , the optical switching method based on laser communication further includes:

[0142] B10. After the optoelectronic conversion module 14 starts to work, the counting unit 134 starts counting;

[0143] B20. When the counted value reaches a preset counting threshold, the counting unit 134 outputs a second stop control signal to the photoelectric conversion module 14;

[0144] B30. The photoelectric conversion module 14 stops operating according to the second stop control signal.

[0145] Specifically, in another embodiment of the present invention, after the photoelectric conversion module 14 is started according to the start control signal block, the photoelectric conversion module 14 starts to convert the optical signal into an electrical signal. At the same time, the counting unit 134 (counter) starts counting. Similarly, when the counted value reaches the preset counting threshold, the second stop control signal is output to the photoelectric conversion module 14 to control the photoelectric conversion module 14 to stop operating or enter a sleep state.

[0146] That is, when the counted value reaches the preset counting threshold, the photoelectric conversion module 14 enters a sleep state or a stop state according to the second stop control signal output by the counting unit 134. That is, by setting the counting unit 134 to count, when the counted value reaches the preset counting threshold, the photoelectric conversion module 14 is controlled to stop operating or enter a sleep state, thereby achieving that after reaching the preset counting threshold, the photoelectric conversion module 14 is immediately controlled to enter a sleep state or stop operating, which can also save power consumption.

[0147] Furthermore, an optical switching terminal device based on laser communication provided by the present invention includes a PCB board, and the above-mentioned optical switching device 10 based on laser communication is provided on the PCB board; since the above-mentioned optical switching device 10 based on laser communication has been described in detail, it will not be elaborated here.

[0148] In summary, an optical switching device, method and terminal device based on laser communication provided by the present invention, the optical switching device includes: a beam splitting and detection module, an optical switching control module, a photoelectric conversion module and an optical switching execution module; the beam splitting and detection module is used for receiving the laser signal transmitted by the optical receiving antenna through N input ports and splitting each laser signal into three paths; the photoelectric conversion module is used for converting the packet header in the second laser signal into an electrical signal after receiving the start control signal; the optical switching control module is used for comparing the required information in the electrical signal with the learned address table after learning the address table to obtain a port matching signal; the optical switching execution module is used for matching the M output ports with the N input ports according to the port matching signal and transmitting the first laser signal through N output ports among the M output ports to the optical transmitting antenna. By only converting the packet header signal in the laser signal during photoelectric conversion, the power consumption is reduced.

[0149] It will be understood that those of ordinary skill in the art can make equivalent substitutions or changes according to the technical solution of the present invention and its inventive concept, and all such changes or substitutions should fall within the protection scope of the appended claims of the present invention.

Claims

1. An optical switching device based on laser communication, connected to an optical receiving antenna and an optical transmitting antenna, characterized in that, the optical switching device based on laser communication includes: a beam splitting and detection module, a delay module, an optical switching control module, an optoelectronic conversion module, and an optical switching execution module; the optical receiving antenna, the beam splitting and detection module, the delay module, the optical switching execution module, and the optical transmitting antenna are connected in sequence, the optical switching control module is respectively connected to the beam splitting and detection module, the optoelectronic conversion module, and the optical switching execution module, and the optoelectronic conversion module is also connected to the beam splitting and detection module; the beam splitting and detection module is configured to, after receiving the laser signal transmitted by the optical receiving antenna through N input ports, divide each laser signal into three paths, transmit the first laser signal and the second laser signal to the delay module and the optoelectronic conversion module respectively, and output an optical signal detection result to the optical switching control module according to the third laser signal; the delay module is configured to control the first laser signal to reach the optical switching execution module after a preset delay time; the optical switching control module is configured to output a start control signal to the optoelectronic conversion module according to the optical signal detection result; the optoelectronic conversion module is configured to, after receiving the start control signal transmitted by the optical switching control module, convert the packet header signal in the second laser signal into an electrical signal, and transmit the electrical signal to the optical switching control module; the optical switching control module is further configured to, after learning the address table, compare the required information in the electrical signal with the learned address table, and transmit the obtained port matching signal to the optical switching execution module; the optical switching execution module is configured to, according to the port matching signal, match the M output ports with the N input ports correspondingly, and transmit the first laser signal to the optical transmitting antenna through N output ports among the M output ports.

2. The optical switching device based on laser communication according to claim 1, characterized in that, the beam splitting and detection module includes: a beam splitting unit and a detection unit; the beam splitting unit is respectively connected to the optical receiving antenna, the detection unit, the optoelectronic conversion module, and the delay module, and the detection unit is also connected to the optical switching control module; the beam splitting unit is configured to divide each laser signal into three laser signals, and transmit the first laser signal, the second laser signal, and the third laser signal to the delay module, the optoelectronic conversion module, and the detection unit respectively; the detection unit is configured to detect the third laser signal and transmit the optical signal detection result to the optical switching control module.

3. The optical switching device based on laser communication according to claim 1, characterized in that, the optical switching control module includes: a start control unit and an address table learning unit; the start control unit is respectively connected to the beam splitting and detection module and the optoelectronic conversion module; the address table learning unit is connected to the optical switching execution module; The startup control unit is configured to output the startup control signal to the photoelectric conversion module according to the optical signal detection result, so as to control the working state of the photoelectric conversion module; the learning address table unit is configured to compare the required information with the learned address table after learning the address table, and transmit the obtained port matching signal to the optical switching execution module.

4. The optical switching device based on laser communication according to claim 1, wherein, the optical switching control module further includes: a timing unit; the timing unit is connected to the photoelectric conversion module; the timing unit is configured to start timing after the photoelectric conversion module starts to work, and output a first stop control signal to the photoelectric conversion module when the timing time reaches a preset timing time.

5. The optical switching device based on laser communication according to claim 1, wherein, the optical switching control module further includes: a counting unit; the counting unit is connected to the photoelectric conversion module; the counting unit is configured to start counting after the photoelectric conversion module starts to work, and output a second stop control signal to the photoelectric conversion module when the counting value reaches a preset counting threshold.

6. The optical switching device based on laser communication according to claim 1, wherein, the required information includes: source MAC address, destination MAC address, protocol type, source IP and destination IP; both M and N are positive integers greater than or equal to 1, and M is greater than or equal to N.

7. The optical switching device based on laser communication according to claim 1, wherein, the optical switching control module is further configured to establish and maintain the address table.

8. An optical switching method based on laser communication, the optical switching method based on laser communication is applicable to the optical switching device based on laser communication according to any one of claims 1-7, wherein, the optical switching method based on laser communication includes the following steps: After the beam splitting unit receives the laser signals transmitted by the N input ports of the optical receiving antenna, it divides each laser signal into three laser signals, and transmits the first laser signal, the second laser signal and the third laser signal to the delay module, the photoelectric conversion module and the detection unit respectively; the detection unit detects the third laser signal and transmits the optical signal detection result to the startup control unit; the startup control unit outputs a startup control signal to the photoelectric conversion module according to the optical signal detection result, so as to control the working state of the photoelectric conversion module; after the photoelectric conversion module starts to work according to the startup control signal, it converts the packet header signal in the second laser signal into an electrical signal and transmits the electrical signal to the learning address table unit; after the learning address table unit learns the address table, it compares the required information in the electrical signal with the learned address table, and transmits the obtained port matching signal to the optical switching execution module; The delay module controls the first laser signal to reach the optical switching execution module after a preset delay time; wherein, the preset delay time is the interval time from when the detection unit starts to detect the third laser signal to when the optical switching execution module completes the port matching process; The optical switching execution module matches the M output ports with the N input ports according to the port matching signal, and transmits the first laser signal to the optical transmitting antenna through N output ports among the M output ports.

9. The optical switching method based on laser communication according to claim 8, characterized in that, the optical switching method based on laser communication further includes: After the optoelectronic conversion module starts to work, the timing unit starts timing; When the timing time reaches the preset timing time, the timing unit outputs a first stop control signal to the optoelectronic conversion module; The optoelectronic conversion module stops operating according to the first stop control signal.

10. The optical switching method based on laser communication according to claim 8, characterized in that, the optical switching method based on laser communication further includes: After the optoelectronic conversion module starts to work, the counting unit starts counting; When the counting value reaches the preset counting threshold, the counting unit outputs a second stop control signal to the optoelectronic conversion module; The optoelectronic conversion module stops operating according to the second stop control signal.

11. The optical switching method based on laser communication according to claim 8, characterized in that, After the optical splitting unit receives the laser signal transmitted through the N input ports by the optical receiving antenna, the steps of splitting each laser signal into three laser signals and transmitting the first laser signal, the second laser signal and the third laser signal to the delay module, the optoelectronic conversion module and the detection unit respectively include: After the optical receiving antenna receives the laser signal, it transmits the laser signal to the optical splitting unit through the N input ports; The optical splitting unit splits each laser signal into the three laser signals, and transmits the first laser signal, the second laser signal and the third laser signal to the delay module, the optoelectronic conversion module and the detection unit respectively.

12. The optical switching method based on laser communication according to claim 8, characterized in that, After the learning address table unit learns the address table, the steps of comparing the required information in the electrical signal with the learned address table and transmitting the obtained port matching signal to the optical switching execution module include: After the start control unit analyzes the source address in the packet header signal, it establishes a mapping relationship between the source address and the N input ports, and writes the mapping relationship into the address table; After the start control unit analyzes the destination address in the packet header signal, it compares the destination address with the address table to obtain the port matching signal, and transmits the port matching signal to the optical switching execution module.

13. An optical switching terminal device based on laser communication, including a PCB board, characterized in that, The PCB board is provided with an optical switching device based on laser communication as described in any one of claims 1-7.

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