Optical communication method, device and system

Abstract

The present invention discloses an optical communication method, device and system, which comprehensively utilizes optical MIMO technology, a wake-up technology including timing control, incoming light direction estimation and tracking, and multi-channel merging technology to comprehensively solve the problems of difficult optical communication alignment, unstable communication link quality, and high optical MIMO power consumption. This solution includes: determining the optical communication direction according to the received first signal; determining at least one target optical receiving device and at least one target optical transmitting device; waking up the at least one target optical receiving device in a dormant state and the at least one target optical transmitting device in a dormant state, and performing optically aligned optical signal communication with the opposite end that sends the first signal through the optical communication direction. This solution can carry out directional optical signal transmission and reception, improve the stability of wireless optical signal communication, and reduce the overall communication power consumption.

Description

Technical Field

[0001] The present invention relates to the field of optical communications, and in particular to an optical communication method, device and system. Background Art

[0002] Wireless optical communication, also known as wireless optical signal communication, is a way of communicating via optical signals, which has the advantages of high speed, convenient spatial multiplexing, high security, and strong anti-interference. However, it has the disadvantages of strong directionality of optical signal transmission and reception, and the need for optical signal transceiver devices to be aligned with each other. In some application scenarios, the optical path of the optical signal may be deflected, resulting in fluctuations and fading of the received signal, or even communication interruption.

[0003] In a multiple-in multiple-out (MIMO) system, multiple antennas are used at both the transmitter and the receiver, forming multiple channels between the transmitter and the receiver. When there are a large number of transmitters and receivers, the overall power consumption of the MIMO system is high, making it difficult to apply to power-constrained application scenarios.

[0004] How to improve the stability of wireless optical signal communication while reducing power consumption is the technical problem to be solved by this application. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide an optical communication method, device and system to solve the problems of unstable wireless optical signal communication and high power consumption.

[0006] In a first aspect, an optical communication method is provided, which is applied to a system including a plurality of optical transmitting devices and a plurality of optical receiving devices, the method comprising:

[0007] Determine an optical communication direction according to a received first signal, the optical communication direction being a direction in which the first signal is received, the first signal being used to wake up at least one of the optical receiving devices in a dormant state;

[0008] Determine at least one target light receiving device and at least one target light sending device, wherein the target light receiving device is used to receive light signals from the light communication direction, and the target light sending device is used to send light signals to the light communication direction;

[0009] The at least one target optical receiving device in a dormant state and the at least one target optical sending device in a dormant state are awakened, and optically aligned optical signal communication is performed with the opposite end that sends the first signal through the optical communication direction.

[0010] Optionally, before determining the optical communication direction according to the received first signal, the method further includes:

[0011] Setting a correspondence between an optical communication device identifier and a plurality of optical receiving devices;

[0012] Wherein, determining the optical communication direction according to the received first signal includes:

[0013] parsing the first signal to determine whether the first signal includes an optical communication device identifier;

[0014] When the first signal includes an optical communication device identifier, the direction of a receivable optical signal of an optical receiving device corresponding to the optical communication device identifier is determined as the optical communication direction.

[0015] Optionally, before determining the optical communication direction according to the received first signal, the method further includes:

[0016] The multiple optical sending devices send a wake-up signal in turn, where the wake-up signal is used to instruct a device that receives the wake-up signal to feed back the first signal.

[0017] Optionally, performing optical signal communication through the optical communication direction by the at least one target optical receiving device and the at least one target optical sending device includes:

[0018] The working state of the target light receiving device is adjusted from a sleep state to an awake state, wherein the target light receiving device works periodically with a preset time length, the target light receiving device in the sleep state receives light signals within a first time length within a unit period and sleeps outside the first time length within the unit period, and the target light receiving device in the awake state receives light signals within a second time length within the unit period, and the second time length is greater than the first time length.

[0019] Optionally, the number of the target optical receiving devices is multiple, and after waking up the at least one target optical receiving device in a dormant state and the at least one target optical sending device in a dormant state, and performing optical signal communication of optical alignment with the opposite end sending the first signal through the optical communication direction, the method further includes:

[0020] When at least one target optical receiving device receives the second signal and at least one target optical receiving device does not receive the second signal, the optical communication change direction is determined according to the received second signal, and the optical communication change direction is used to directionally receive and transmit optical signals for optical signal communication.

[0021] In a second aspect, an optical communication system is provided, comprising:

[0022] A central processing device, a plurality of optical receiving devices connected to the central processing device for communication, and a plurality of optical transmitting devices connected to the central processing device for communication;

[0023] The central processing unit is used for:

[0024] Determine an optical communication direction according to a received first signal, the optical communication direction being a direction in which the first signal is received, the first signal being used to wake up at least one of the optical receiving devices in a dormant state;

[0025] Determine at least one target light receiving device and at least one target light sending device, wherein the target light receiving device is used to receive light signals from the light communication direction, and the target light sending device is used to send light signals to the light communication direction;

[0026] The at least one target optical receiving device in a dormant state and the at least one target optical sending device in a dormant state are awakened, and optically aligned optical signal communication is performed with the opposite end that sends the first signal through the optical communication direction.

[0027] Optionally, the system further comprises: a radio wave module communicatively connected to the central processing unit;

[0028] The radio wave module is used to send the first signal received in the form of radio waves to the central processing device.

[0029] In a third aspect, an optical communication device is provided, comprising:

[0030] a direction determination module, which determines an optical communication direction according to a received first signal, wherein the optical communication direction is a direction in which the first signal is received, and the first signal is used to wake up at least one of the optical receiving devices in a dormant state;

[0031] a device determination module, determining at least one target light receiving device and at least one target light sending device, wherein the target light receiving device is used to receive light signals from the light communication direction, and the target light sending device is used to send light signals to the light communication direction;

[0032] The communication module wakes up the at least one target optical receiving device in a dormant state and the at least one target optical sending device in a dormant state, and performs optical signal communication of optical alignment with the opposite end sending the first signal through the optical communication direction.

[0033] In a fourth aspect, an electronic device is provided, which includes a processor, a memory, and a computer program stored in the memory and executable on the processor, and when the computer program is executed by the processor, the steps of the method of the first aspect are implemented.

[0034] In a fifth aspect, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method in the first aspect are implemented.

[0035] In an embodiment of the present application, the optical communication direction is determined according to the received first signal, the optical communication direction is the direction in which the first signal is received, and the first signal is used to wake up at least one optical receiving device in a dormant state; at least one target optical receiving device and at least one target optical transmitting device are determined, the target optical receiving device is used to receive an optical signal from the optical communication direction, and the target optical transmitting device is used to send an optical signal to the optical communication direction; the at least one target optical receiving device in a dormant state and the at least one target optical transmitting device in a dormant state are woken up, and optically aligned optical signal communication is performed with the opposite end that sends the first signal through the optical communication direction. The scheme of the embodiment of the present invention first determines the optical communication direction according to the received signal, and then performs optical signal communication based on the optical communication direction, which can perform directional optical signal transmission and reception, improve the stability of wireless optical signal communication, and reduce the overall communication power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0037] Figure 1a It is one of the flow charts of an optical communication method according to an embodiment of the present invention;

[0038] Figure 1b is a schematic diagram of the distribution of multiple optical transceiver devices according to an embodiment of the present invention;

[0039] Figure 2 This is a second flow chart of an optical communication method according to an embodiment of the present invention;

[0040] Figure 3 This is a third flow chart of an optical communication method according to an embodiment of the present invention;

[0041] Figure 4 is a working timing diagram of an optical transceiver device according to an embodiment of the present invention;

[0042] Figure 5 This is a fourth flow chart of an optical communication method according to an embodiment of the present invention;

[0043] Figure 6 It is one of the structural schematic diagrams of an optical transceiver system according to an embodiment of the present invention;

[0044] Figure 7 This is a second structural schematic diagram of an optical transceiver system according to an embodiment of the present invention;

[0045] Figure 8 It is a structural schematic diagram of an optical transceiver according to an embodiment of the present application. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The figure numbers in this application are only used to distinguish the various steps in the scheme, and are not used to limit the execution order of the various steps. The specific execution order is subject to the description in the specification.

[0047] Wireless optical communication technology is an emerging communication technology that can be applied to various wireless communication fields. In the field of wireless optical communication, in order to ensure that the optical transmitter and the optical receiver can achieve good optical signal communication, the optical transmitter and the optical receiver need to be aligned with each other to perform directional optical signal transmission and reception. In order to reduce the difficulty of alignment and prevent the interruption of the optical path, multiple optical transmitters and multiple optical receivers can be used to form a MIMO (Multiple-Input Multiple-Output) system. The MIMO system refers to the use of multiple transmitting antennas and receiving antennas at the transmitting end and the receiving end, respectively, so that the signal is transmitted and received through multiple antennas at the transmitting end and the receiving end, thereby improving the communication quality. However, when the number of optical transmitters or optical receivers is large, the overall power consumption of the MIMO system is large. In the application scenarios of fixed optical communication, mobile optical communication, drones, robots, or other unmanned platforms using batteries, the optical transmitter and the optical receiver are often powered by batteries. The high power consumption of this solution will lead to the problem of short battery life, so this solution is difficult to be widely used in various wireless communication scenarios.

[0048] In order to solve the problems existing in the prior art, the embodiment of the present application provides an optical communication method, which is applied to a system including multiple optical sending devices and multiple optical receiving devices, such as Figure 1a As shown, the method comprises the following steps:

[0049] S11: determining an optical communication direction according to a received first signal, where the optical communication direction is a direction in which the first signal is received, and the first signal is used to wake up at least one of the optical receiving devices in a dormant state;

[0050] S12: Determine at least one target light receiving device and at least one target light sending device, wherein the target light receiving device is used to receive light signals from the optical communication direction, and the target light sending device is used to send light signals to the optical communication direction;

[0051] S13: Wake up the at least one target optical receiving device in a dormant state and the at least one target optical sending device in a dormant state, and perform optical signal communication in an optically aligned manner with the opposite end that sends the first signal through the optical communication direction.

[0052] The solution provided in the embodiment of the present application is applied to a system including multiple optical transmitting devices and multiple optical receiving devices. For the sake of convenience, the sum of multiple optical transmitting devices and multiple optical receiving devices is referred to as an optical transceiver device. Figure 1b As shown, the system includes multiple optical transmitting devices A and multiple optical receiving devices B. Figure 1b The optical transmitting devices and the optical receiving devices are evenly distributed. In order to realize optical signal communication in all directions, the above-mentioned multiple optical transmitting devices and multiple optical receiving devices can be arranged on the surface of a polyhedron to achieve the function of performing optical signal transmission and reception in multiple directions. The shape, volume and number of surfaces of the polyhedron are not limited in this scheme. For example, the polyhedron is a tetrahedron, and the optical transceiver devices are evenly distributed on the four surfaces of the tetrahedron. Alternatively, the above-mentioned optical transceiver devices are evenly distributed on the surface of a sphere or a hemisphere. Alternatively, the above-mentioned optical transceiver devices are evenly distributed on a plane, and optical signal communication in different directions is realized through different communication angles of each optical transceiver device.

[0053] Optical signal communication in multiple directions can be achieved through multiple optical transmitting devices and multiple optical receiving devices. However, if communication is carried out through these optical transmitting and receiving devices at the same time, the power consumption is often large, and some of the power consumption is useless. For example, some optical receiving devices cannot receive optical signals during operation, or some optical signals sent by some optical transmitting devices cannot be received by the other end and no feedback is obtained.

[0054] For example, suppose that a system including multiple optical transmitters and multiple optical receivers includes 46 5-watt optical transmitters. When all of these optical transmitters are emitting light, the power consumption will be as high as 230 watts, which is unacceptable for most optical communication scenarios.

[0055] In order to solve the problems existing in the prior art, in step S11 of the embodiment of the present application, the optical communication direction is first determined according to the received first signal, and the optical communication direction is the direction in which the first signal is received, and the first signal is used to wake up at least one of the optical receiving devices in a dormant state. In the absence of communication, multiple optical transceivers are in a dormant state. Then, in step S12, a target optical transmitting device and a target optical receiving device that can communicate with the optical communication direction are determined. Among them, there may be one or more target optical transmitting devices, and there may also be one or more target optical receiving devices. When the number of target optical transmitting devices or target optical receiving devices is one, the overall power consumption of optical communication can be effectively reduced. When the number of target optical transmitting devices or target optical receiving devices is multiple, the communication quality of optical communication can be effectively improved. In practical applications, the number of target optical transmitting devices and target optical receiving devices can be pre-set according to actual needs, or the number of target optical receiving devices or the number of target optical transmitting devices can be determined according to the received first signal. Specifically, when it is necessary to actively initiate communication, at least some of the optical transmitting devices can be awakened to send signals in turn, thereby establishing a connection with the opposite end. When at least one optical receiving device receives a signal from the other end, at least some of the optical receiving devices can be awakened according to the received signal for communication, and the optical transmitting devices corresponding to the awakened optical receiving devices can also be awakened to receive and send optical signals.

[0056] Subsequently, optical signal communication is performed based on the determined target optical receiving device and target optical transmitting device through the optical communication direction. Since the optical communication direction is determined based on the first signal, the direction of the opposite end that sends the first signal is the direction indicated by the optical communication direction. By performing optical signal communication through the optical communication direction, optical signal alignment can be achieved with the opposite end that sends the first signal, thereby effectively performing optical signal communication and improving the stability and communication quality of optical signal communication.

[0057] The solution provided by the embodiment of the present application does not require the execution of optical signal communication through all optical transceiver devices, and optical signal communication aligned with the first signal peer can be achieved only through the target optical transmitting device and the target optical receiving device. While reducing the overall power consumption, optical signal alignment communication can be achieved, effectively improving the stability and communication quality of optical signal communication. This solution can be widely used in mobile optical communication and unmanned platform cluster optical communication. The use of optical communication also solves the problem that traditional communication of unmanned platform clusters is susceptible to interference.

[0058] To further illustrate this solution, the following is an example of an optical transceiver system arranged on a soccer ball-shaped surface. Of course, multiple optical transceivers in this solution can also be arranged on the surface of a sphere to achieve the effect of full-angle optical signal transmission and reception.

[0059] The football-shaped polyhedron surface includes 20 hexagons and 12 pentagons, and the multiple optical transceiver devices of this embodiment are arranged at the corner points and center points of these polygons. Among them, the optical receiving device and the optical transmitting device are arranged alternately to achieve the technical effect that multiple optical receiving devices can receive optical signals in all directions and multiple optical transmitting devices can send optical signals in all directions. Specifically, the football-shaped polyhedron surface has a total of 92 layout points, including 60 vertices and 32 center points. Among them, the center point includes the center point of the hexagon and the center point of the pentagon. Preferably, 46 optical transmitting devices and 46 optical receiving devices are alternately arranged on these 92 layout points. This structure can realize the transmission and reception of optical signals in all directions, and can realize optical signal communication with the opposite end located in all directions.

[0060] The system including multiple optical transmitting devices and multiple optical receiving devices described in this embodiment may also include a central processing device for processing optical signals. In addition, it may also include a power supply for supplying energy, a storage device or other devices or modules for realizing optical communication.

[0061] In this system, all optical transmitting devices and all optical receiving devices are connected to the central processing device for communication. The optical receiving device transmits the received optical signal to the central processing device for analysis and processing, and the optical transmitting device is used to send the signal generated by the central processing device in the form of an optical signal.

[0062] The central processing unit can process the signal according to actual needs. For example, the central processing unit can be used to store the information sequence to be sent, and form a certain frame format with the information sequence and the necessary overhead sequence, and send the data frame to the optical sending device to send it in the form of an optical signal. The central processing unit can also be used to store the sequence transmitted by the receiving device, parse it to obtain the information sequence, perform data verification, and select the data that passes the verification to complete the extraction of the information sequence. If all the received data cannot pass the verification, a larger judgment can be made and then the verification can be continued. If the verification is passed, the information output is completed, otherwise a signal of data reception failure is generated and fed back to the optical communication counterpart. Among them, the steps of performing data verification and extracting the information sequence can be performed by a multi-channel merging module deployed in the central processing unit.

[0063] In addition, the central processing unit can also generate the timing waveform necessary for optical signal communication, and send it to the optical transmitting module, the optical receiving module and other modules to provide a clock signal and necessary control signals. The central processing unit can also perform switching control between the wake-up state and the sleep state for each optical transceiver according to the received signal or based on a preset clock signal. In order to wake up the target optical receiving module and the target optical transmitting module to perform optical signal communication, and at the same time control other optical transceiver modules to sleep, so as to reduce the overall power consumption and achieve efficient and stable optical signal communication. Among them, the step of generating the timing waveform can also be performed by the timing control module deployed in the central processing unit. The step of switching control between the wake-up state and the sleep state can also be performed by the wake-up module deployed in the central processing unit. In addition, the central processing unit can also be deployed with a module for estimating and tracking the incoming light direction of the target optical transmitting device and the target optical receiving device based on the received first signal.

[0064] Based on the solution provided in the above embodiment, optionally, Figure 2 As shown, before the above step S11, determining the optical communication direction according to the received first signal, the following steps are also included:

[0065] S21: Setting a correspondence between an optical communication device identifier and a plurality of optical receiving devices;

[0066] The above step S11, determining the optical communication direction according to the received first signal, includes:

[0067] S22: parsing the first signal to determine whether the first signal includes an optical communication device identifier;

[0068] S23: When the first signal includes an optical communication device identifier, determine the direction of a receivable optical signal of the optical receiving device corresponding to the optical communication device identifier as the optical communication direction.

[0069] Specifically, the optical receiving device may specifically include a front-end optical module and a photoelectric conversion module. Optionally, each optical receiving device in the same system is preset with a unique identifier (i.e., an optical communication device identifier), and the central processing unit may call different optical receiving devices based on the unique identifier to perform optical signal reception. Among them, the front-end optical module is used to receive optical signals from the optical communication direction, and the photoelectric conversion module is used to convert the optical signals received by the front-end optical module into electrical signals and send them to the central processing unit to perform signal parsing processing. When the received first signal includes an optical communication device identifier, the receivable optical signal direction of the optical receiving device corresponding to the parsed optical communication identifier may be determined as the optical communication direction to perform optical signal communication.

[0070] In addition, the optical sending device may specifically include a driving circuit and a light-emitting module, which are used to send the sequence provided by the central processing module. Optionally, each optical sending device in the same system is preset with a unique identifier, and the central processing device can call different optical sending devices to send optical signals based on the unique identifier. The optical sending device includes a photoelectric conversion module, which is used to convert the sequence from the central processing module into an optical signal and send it through the light-emitting module. In addition, the optical signal sent by the optical sending device may carry the optical communication device identifier of the opposite end that needs to perform optical signal communication, so as to improve the efficiency of performing optical signal communication with the opposite end.

[0071] Based on the solution provided in the above embodiment, optionally, Figure 3 As shown, before the above step S11, determining the optical communication direction according to the received first signal, the method further includes the following steps:

[0072] S31: sending a wake-up signal in turn through the multiple optical sending devices, where the wake-up signal is used to instruct the device that receives the wake-up signal to feed back the first signal.

[0073] In some application scenarios, it is necessary for this end to find the other end to perform optical signal communication. In this application scenario, it is necessary for this end to actively initiate communication, and this end does not know the location of the other end. At this time, multiple optical sending devices on this end send wake-up signals in turn. The wake-up signal is used to instruct the device that receives the wake-up signal to feedback the first signal, thereby realizing the search for the other end that needs to perform optical signal communication in various directions. When the other end receives the wake-up signal and feeds back the first signal, this end can determine the direction of the other end based on the direction of receiving the first signal, and then perform optical signal communication in this direction.

[0074] For example, assume that the two communicating parties are A and B. When A needs to communicate with B, A can transmit a wake-up sequence corresponding to B. B performs sequence recognition after receiving the optical signal demodulation. If B finds that the received optical signal contains a wake-up sequence corresponding to itself, it can perform optical signal communication with A through the direction of the received optical signal.

[0075] The solution provided in the embodiment of the present application can realize omnidirectional opposite end position search in the application scenario of actively initiating optical signal communication, thereby determining the direction of optical communication, and then performing optical signal communication in this direction to realize optically aligned optical signal communication.

[0076] Based on the solution provided in the above embodiment, optionally, the above step S13, waking up the at least one target optical receiving device in a dormant state and the at least one target optical sending device in a dormant state, and performing optical signal communication of optical alignment with the opposite end sending the first signal through the optical communication direction, includes the following steps:

[0077] The working state of the target light receiving device is adjusted from a sleep state to an awake state, wherein the target light receiving device works periodically with a preset time length, the target light receiving device in the sleep state receives light signals within a first time length within a unit period and sleeps outside the first time length within the unit period, and the target light receiving device in the awake state receives light signals within a second time length within the unit period, and the second time length is greater than the first time length.

[0078] In actual applications, there are many optical transceivers in the system, and the overall power consumption is extremely high when these devices are in operation at the same time. Due to the propagation characteristics of light, some receiving devices in certain directions may not be able to receive incoming optical signals during communication. Therefore, in actual communication, only the receiving module in the direction of the incoming light needs to be awakened, which can effectively reduce the overall optical communication power consumption.

[0079] In the solution provided in the embodiment of the present application, each optical receiving device works periodically. In one cycle, the optical signal is received within a preset time length, and it sleeps outside the preset time length in the cycle, thereby effectively reducing the power consumption of each optical receiving device. For each optical transmitting device, when it is necessary to send an optical signal, the target optical transmitting device can be awakened to perform optical signal transmission in the optical communication direction, and when it is not necessary to send an optical signal, the optical transmitting device can be controlled to sleep, thereby reducing the power consumption of each optical transceiver.

[0080] Specifically, in this embodiment, each optical receiving device can be in a dormant state when no signal is received. In the dormant state, the optical receiving device periodically works as shown in the timing diagram. Figure 4 As shown. In the period T, the light receiving device is A It is activated during the period and can receive optical signals. S The first time length is T A , the second time length is T S Compared with the method of performing optical signal reception at all times, the solution provided in the embodiment of the present application can effectively reduce the power consumption of the optical receiving device.

[0081] In practical applications, the cycle length, the first time length, and the second time length can be preset according to actual needs. A The smaller the value of T, the lower the overall power consumption. A The design of T can be set by comprehensively considering the requirements of wake-up sequence length, communication rate and response time. A A complete wake-up sequence is received within 1 second, then the time required for the wake-up sequence to be sent is T W ≤T A / 2. The end receiving the wake-up sequence uses the wake-up sequence assigned to itself to perform sliding correlation with the received sequence, so as to realize the wake-up sequence recognition.

[0082] For example, since the local end and the remote end of the optical communication do not know each other's specific position, the optical transmitting device can first send a wake-up sequence to determine the position of the other party. Specifically, multiple optical transmitting devices can send optical signals carrying the wake-up sequence in turn, that is, there are only K A The light emitting devices transmit signals, among which K A is a positive integer. A The maximum value of can be determined by the ratio of the power that can be provided to the optical transmission device to the power consumed by each optical transmission device. A The larger the value, the shorter the time consumed by the entire wake-up process, but the greater the instantaneous power consumption.

[0083] Based on the solution provided in the above embodiment, optionally, the number of the target light receiving devices is multiple, such as Figure 5 As shown, in the above step S13, after waking up the at least one target optical receiving device in a dormant state and the at least one target optical sending device in a dormant state, and performing optical signal communication of optical alignment with the opposite end sending the first signal through the optical communication direction, the method further includes the following steps:

[0084] S51: When there is at least one target optical receiving device that receives the second signal and at least one target optical receiving device that does not receive the second signal, determine the optical communication change direction according to the received second signal, wherein the optical communication change direction is used to directionally transmit and receive optical signals for optical signal communication.

[0085] In the field of optical communications, when the positions of both optical communication transceivers are uncertain, it is necessary to first determine the relative positions of both parties before normal communication can be achieved through directional transmission and reception of optical signals. In some application scenarios, the relative positions between optical transceivers are not fixed. When the relative positions of both parties change, it is even more difficult to achieve normal optical signal communication.

[0086] Taking the optical transceiver arranged on the surface of a soccer-shaped polyhedron as an example, when the positions of the two communicating parties move relative to each other, the direction of optical communication also changes accordingly. In order to effectively track the change in the direction of the incoming light, the central processing module can first determine the optical receiving device that receives the optical signal and activate it, and simultaneously activate multiple optical receiving devices located near the optical receiving device, and expand the receivable range of the received optical signal by activating multiple optical receiving devices. When the positions of the two communicating parties move, the number of optical receiving devices that can receive the optical signal will change. At this time, some of the activated target optical receiving devices can receive the second optical signal, and other target optical receiving devices cannot receive the second signal. The moving direction of the opposite end can be determined based on the relative position of the target optical receiving device that receives the second signal and the target optical receiving device that does not receive the second signal, so that the optical communication direction is changed according to the moving direction of the opposite end, and optical communication tracking is realized, the continuity of optical signal communication is ensured, and the quality of optical communication is improved.

[0087] Optionally, since multiple optical receiving devices are activated, multiple receiving devices will receive optical signals at the same time during communication. In order to improve communication performance, multiple signals can be combined at the same time. There are two situations when combining:

[0088] 1) At least one received sequence passes the data check (the sent data includes data integrity check, such as CRC check), then any one of the data that passes the check is selected as the received information sequence;

[0089] 2) If all receiving devices fail to pass the verification, the data at the same position in the receiving sequence can be judged as larger and then verified. If the verification is passed, the information sequence is completed, otherwise the communication fails.

[0090] The maximum decision can be explained by the following example. For example, the sequences received by the three receiving devices are: 11110, 10111, 00110. The first bit position in the sequence is 1 1 0. At this time, due to the large number of 1s, the maximum decision of this bit is 1; the second bit position is 1 0 0. At this time, due to the large number of 0s, the maximum decision is 0; and so on. After the maximum decision of the entire sequence, the output sequence is 10110.

[0091] Take the communicating parties A and B as an example, assuming that A actively initiates the communication; the wake-up sequences pre-assigned to A and B are S WA and S WB When a specific sequence wake-up method is sent through the optical transmitter, the communication process is as follows:

[0092] 1) All optical transceiver modules of A and B are in a dormant state, specifically, they may be periodically alternating between an awake state and a dormant state, and the dormant state accounts for a large proportion of the period;

[0093] 2) According to the timing control, A uses multiple optical transmission modules in turn to send B's wake-up sequence in all directions;

[0094] 3) B is in a dormant state, its light receiving device is in a dormant state, and the dormant state accounts for a large proportion of the cycle; if one or more light receiving devices receive sequence S WB , then these optical receiving devices that have received the optical signal change from the sleep state to the awake state and do not enter the sleep state again until the communication ends or these devices can no longer detect S within a time window. WB .

[0095] 4) B receives S WB Determine the corresponding optical transceiver and perform wake-up.

[0096] 5) B uses the awakened optical transmitter to send sequence S WA , in response to A.

[0097] 6) If A receives the response S from B within a certain time window WA , then wake up the responding optical transceiver, and also wake up the optical transceivers around it to establish optical signal communication with B. Subsequently, A and B can send and receive optical signals to each other. If no response signal from B is received after the time window, A can jump to 2) resend S WB .

[0098] The present invention comprehensively utilizes the technology of alternating light emission, wake-up technology, incoming light direction estimation, incoming light direction tracking and multi-path merging technology to realize omnidirectional optical communication technology without spatial search and mechanical alignment operation, which greatly reduces the power consumption of the communication device and can realize multi-user spatial multiplexing.

[0099] In order to solve the problems existing in the prior art, the embodiment of the present application also provides an optical communication system, such as Figure 6 As shown, including:

[0100] A central processing device 61, a plurality of optical receiving devices 62 connected to the central processing device 61 for communication, and a plurality of optical transmitting devices 63 connected to the central processing device 61 for communication;

[0101] The central processing unit 61 is used for:

[0102] Determine an optical communication direction according to a received first signal, the optical communication direction being a direction in which the first signal is received, the first signal being used to wake up at least one of the optical receiving devices in a dormant state;

[0103] Determine at least one target light receiving device and at least one target light sending device, wherein the target light receiving device is used to receive light signals from the light communication direction, and the target light sending device is used to send light signals to the light communication direction;

[0104] The at least one target optical receiving device in a dormant state and the at least one target optical sending device in a dormant state are awakened, and optically aligned optical signal communication is performed with the opposite end that sends the first signal through the optical communication direction.

[0105] Based on the solution provided in the above embodiment, Figure 7 As shown, the system further includes: a radio wave module 71 communicatively connected to the central processing unit 61;

[0106] The radio wave module 71 is used to send the first signal received in the form of radio waves to the central processing device.

[0107] In the solution provided in the embodiment of the present application, wake-up can also be performed through radio waves, that is, the first signal in the aforementioned embodiment can be an optical signal, and in this embodiment, the first signal can be a radio signal.

[0108] Now assume that A and B, who have a radio transceiver, need to communicate by optical signal, wherein the radio transceiver can be an integrated device with a radio transceiver function, or a device with a radio transmission function and a device with a radio reception function. The specific process of the solution provided in this embodiment is as follows:

[0109] 1) Initially, all optical transceivers are in dormant mode, and radio wave transceivers are in standby mode;

[0110] 2) A uses a radio transceiver to send a wake-up sequence S in the form of radio waves WB , and at the same time wake up the radio receiving function to receive B's response.

[0111] 3) If the radio transceiver B receives the sequence S WB , then wake up the optical transceiver module that responds to the sequence and responds to A in the form of a radio signal S WA , to indicate A wakes up and S WA The corresponding optical transceiver module performs optical signal communication.

[0112] 4) If A does not receive S sent by B WA , then repeat and jump to step 2); otherwise A uses multiple optical sending devices to send S in turn WB If B successfully receives the sequence, B receives S WBThe optical transceiver device number is used to wake up the corresponding optical sending device, or wake up the device near the device corresponding to the number, and use the awakened optical sending device and sending module to send the sequence S WA , in response.

[0113] 5) If A does not receive a response from B within a certain time window, then jump to 2). Otherwise, A queries and receives the S sent by B. WA If there are optical receiving devices, these receiving devices are awakened, and the optical transmitting devices around them are awakened at the same time. At this time, it is considered that the communication link is established.

[0114] In the solution provided in this embodiment, omnidirectional communication can be conveniently realized by using microwaves or ultrashort waves (hereinafter referred to as radio waves for convenience of description). Compared with sending the wake-up sequence by optical signals, sending the wake-up sequence by radio waves does not require multiple sending devices to transmit in turn, and only needs to attach a radio wave transceiver module. Therefore, it has the advantages of short wake-up time and simple implementation, low overall power consumption, and simple control. By using radio wave wake-up, all optical receiving modules can be in a dormant state before being awakened, without being in an alternating activation dormant state.

[0115] There are two working modes for the wake-up operation using radio waves at the receiving end: 1) The receiver is in both active and sleep states, and the length limit and timing control of the sending sequence are consistent with the wake-up method using an optical sending device to send a specific sequence; 2) The receiver is always in the receiving state and does not need to sleep.

[0116] The first working mode will not be described in detail. This working mode can be used when the power consumption of the radio receiving module is large or accounts for a large proportion of the overall power consumption, thereby reducing the power consumption of the radio receiving module.

[0117] When the power consumption of the radio wave receiving module is low or negligible compared with the overall power consumption, the second working mode can be used. Compared with the first working mode, this mode is simple to control and has a fast wake-up response speed. When the radio receiving module receives the wake-up sequence, it wakes up the optical communication device and starts working.

[0118] In order to solve the problems existing in the prior art, the embodiment of the present application further provides an optical communication device 80, such as Figure 8 As shown, the electronic device includes:

[0119] A direction determination module 81, which determines an optical communication direction according to a received first signal, wherein the optical communication direction is a direction in which the first signal is received, and the first signal is used to wake up at least one of the optical receiving devices in a dormant state;

[0120] A device determination module 82 determines at least one target light receiving device and at least one target light sending device, wherein the target light receiving device is used to receive light signals from the light communication direction, and the target light sending device is used to send light signals to the light communication direction;

[0121] The communication module 83 wakes up the at least one target optical receiving device in a dormant state and the at least one target optical sending device in a dormant state, and performs optical signal communication of optical alignment with the opposite end sending the first signal through the optical communication direction.

[0122] The solution of the embodiment of the present invention can carry out directionally transmitted and received optical signals, improve the stability of wireless optical signal communication, and realize optical alignment communication.

[0123] Preferably, an embodiment of the present invention further provides an electronic device, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, the various processes of the above-mentioned image processing method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0124] The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, each process of the above-mentioned image processing method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here. The computer-readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0125] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0126] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0127] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. An optical communication method, characterized in that: Applied to a system including a plurality of optical transmitting devices and a plurality of optical receiving devices, the method comprises: Setting a correspondence between an optical communication device identifier and a plurality of optical receiving devices; Determine an optical communication direction according to a received first signal, the optical communication direction being a direction in which the first signal is received, the first signal being used to wake up at least one of the optical receiving devices in a dormant state; Determine at least one target light receiving device and at least one target light sending device, wherein the target light receiving device is used to receive light signals from the light communication direction, and the target light sending device is used to send light signals to the light communication direction; Waking up the at least one target optical receiving device in a dormant state and the at least one target optical sending device in a dormant state, and performing optical signal communication of optical alignment with the opposite end sending the first signal through the optical communication direction; Wherein, determining the optical communication direction according to the received first signal includes: parsing the first signal to determine whether the first signal includes an optical communication device identifier; When the first signal includes an optical communication device identifier, determining a direction of a receivable optical signal of an optical receiving device corresponding to the optical communication device identifier as the optical communication direction; Wherein, waking up the at least one target optical receiving device in a dormant state and the at least one target optical sending device in a dormant state, and performing optical signal communication of optical alignment with the opposite end sending the first signal through the optical communication direction, comprises: The working state of the target light receiving device is adjusted from a sleep state to an awake state, wherein the target light receiving device works periodically with a preset time length, the target light receiving device in the sleep state receives light signals within a first time length within a unit period and sleeps outside the first time length within the unit period, and the target light receiving device in the awake state receives light signals within a second time length within the unit period, and the second time length is greater than the first time length.

2. The method according to claim 1, characterized in that Before determining the optical communication direction according to the received first signal, the method further includes: The multiple optical sending devices send a wake-up signal in turn, where the wake-up signal is used to instruct a device that receives the wake-up signal to feed back the first signal.

3. The method according to claim 1 or 2, characterized in that The number of the target optical receiving devices is multiple, and after waking up the at least one target optical receiving device in a dormant state and the at least one target optical sending device in a dormant state, and performing optical signal communication of optical alignment with the opposite end sending the first signal through the optical communication direction, the method further includes: When at least one target optical receiving device receives the second signal and at least one target optical receiving device does not receive the second signal, the optical communication change direction is determined according to the received second signal, and the optical communication change direction is used to directionally receive and transmit optical signals for optical signal communication.

4. An optical communication system, characterized in that: include: A central processing device, a plurality of optical receiving devices connected to the central processing device for communication, and a plurality of optical transmitting devices connected to the central processing device for communication; The central processing unit is used for: Setting a correspondence between an optical communication device identifier and a plurality of optical receiving devices; Determine an optical communication direction according to a received first signal, the optical communication direction being a direction in which the first signal is received, the first signal being used to wake up at least one of the optical receiving devices in a dormant state; Determine at least one target light receiving device and at least one target light sending device, wherein the target light receiving device is used to receive light signals from the light communication direction, and the target light sending device is used to send light signals to the light communication direction; Waking up the at least one target optical receiving device in a dormant state and the at least one target optical sending device in a dormant state, and performing optical signal communication of optical alignment with the opposite end sending the first signal through the optical communication direction; Wherein, determining the optical communication direction according to the received first signal includes: parsing the first signal to determine whether the first signal includes an optical communication device identifier; When the first signal includes an optical communication device identifier, determining a direction of a receivable optical signal of an optical receiving device corresponding to the optical communication device identifier as the optical communication direction; Wherein, waking up the at least one target optical receiving device in a dormant state and the at least one target optical sending device in a dormant state, and performing optical signal communication of optical alignment with the opposite end sending the first signal through the optical communication direction, comprises: The working state of the target light receiving device is adjusted from a sleep state to an awake state, wherein the target light receiving device works periodically with a preset time length, the target light receiving device in the sleep state receives light signals within a first time length within a unit period and sleeps outside the first time length within the unit period, and the target light receiving device in the awake state receives light signals within a second time length within the unit period, and the second time length is greater than the first time length.

5. The system according to claim 4, characterized in that Also includes: a radio wave module communicatively connected to the central processing unit; The radio wave module is used to send the first signal received in the form of radio waves to the central processing device.

6. An optical communication device, characterized in that: Applicable to a system including multiple optical transmitting devices and multiple optical receiving devices, including: a direction determination module, setting a correspondence between an optical communication device identifier and a plurality of optical receiving devices; determining an optical communication direction according to a received first signal, wherein the optical communication direction is a direction in which the first signal is received, and the first signal is used to wake up at least one of the optical receiving devices in a dormant state; Wherein, determining the optical communication direction according to the received first signal includes: parsing the first signal to determine whether the first signal includes an optical communication device identifier; When the first signal includes an optical communication device identifier, determining a direction of a receivable optical signal of an optical receiving device corresponding to the optical communication device identifier as the optical communication direction; a device determination module, determining at least one target light receiving device and at least one target light sending device, wherein the target light receiving device is used to receive light signals from the light communication direction, and the target light sending device is used to send light signals to the light communication direction; a communication module, waking up the at least one target optical receiving device in a dormant state and the at least one target optical sending device in a dormant state, and performing optical signal communication of optical alignment with the opposite end sending the first signal through the optical communication direction; Wherein, waking up the at least one target optical receiving device in a dormant state and the at least one target optical sending device in a dormant state, and performing optical signal communication of optical alignment with the opposite end sending the first signal through the optical communication direction, comprises: The working state of the target light receiving device is adjusted from a sleep state to an awake state, wherein the target light receiving device works periodically with a preset time length, the target light receiving device in the sleep state receives light signals within a first time length within a unit period and sleeps outside the first time length within the unit period, and the target light receiving device in the awake state receives light signals within a second time length within the unit period, and the second time length is greater than the first time length.

7. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps of the method according to any one of claims 1 to 3 when executed by the processor.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 3 are implemented.

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