Communication transmitting device and method, equipment, storage medium and program product

Abstract

The invention discloses a communication transmitting device, method and equipment, a storage medium and a program product, and relates to the field of communication, a single differential serial signal and a laser power control signal are output through a control module, and then the differential serial signal is fanned out to a plurality of laser transmitting diode modules through a signal fanout module; each laser emitting diode module carries out laser emission according to the received signal, and the light spots corresponding to the laser emitted by the plurality of laser emitting diodes are overlapped, so that multi-laser parallel emission is realized, the total effective emission power is remarkably improved, the problem that the power of a single laser emitting diode is limited is effectively solved, and the service life of the laser emitting diodes is prolonged. And even in long-distance transmission, relatively high receiving optical power can be ensured, the signal-to-noise ratio is improved, and the bit error rate is reduced, so that the technical problem that the communication quality is reduced due to limited transmitting power in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and particularly to a communication transmitting device, method, equipment, storage medium and program product. Background Art

[0002] Laser communication technology has been widely used in point-to-point high-speed communication systems due to its characteristics of high rate, low latency and strong anti-interference ability. However, in optical mobile communication systems, since the relative positions and speeds of the nodes at both ends of the communication link change continuously over time, compared with fixed-point communication, in order to ensure the stability of the laser link, the transmitting end has higher requirements for the laser emission power and the spot coverage range.

[0003] In the prior art, a single laser emitting diode that supports Gbps or even higher rates usually has limited emission power. When the distance between the transceiver ends increases, the effective optical power that can be obtained at the receiving end will be significantly reduced, resulting in the deterioration of the signal-to-noise ratio, thereby increasing the bit error rate and affecting the communication quality. Therefore, how to improve the stability and reliability of the laser communication link while ensuring high-rate communication has become a key problem to be solved in the prior art. Summary of the Invention

[0004] The purpose of this application is to provide a communication transmitting device, method, equipment, storage medium and program product, which realizes multi-laser parallel emission, significantly improves the overall effective emission power, effectively makes up for the problem of limited power of a single laser emitting diode, and solves the technical problem of the decline in communication quality caused by limited emission power in the prior art.

[0005] This application provides a communication transmitting device, which is arranged at the communication transmitting end and includes:

[0006] A control module, including a signal output end and a control output end, is used to convert communication data into a single differential serial signal, output the differential serial signal through its own signal output end, and output a laser power control signal through its own control output end;

[0007] A fan-out module, whose signal input end is connected to the signal output end of the control module, is used to fan out a single differential serial signal into multiple differential serial signals with the same phase;

[0008] Multiple laser emitting diode modules, whose signal input ends are correspondingly connected to the multiple signal output ends of the fan-out module, and whose control input ends are connected to the control output end of the control module. Each laser emitting diode module is used to adjust the power of the laser emitted by itself and emit the laser under the drive of the differential serial signal, and the spots corresponding to the lasers emitted by the multiple laser emitting diode modules overlap.

[0009] The present application also provides a communication transmission method. Based on the communication transmission device described above, the communication transmission method includes:

[0010] Determine the target spot coverage area according to the maximum movement range of the communication receiving end on the plane of the vertical optical link. The target spot coverage area is the spot area that a single laser emitting diode module needs to cover, and the target spot coverage area is not less than the area corresponding to the maximum movement range;

[0011] Determine the number of laser emitting diode modules required according to the target laser power requirement of the communication receiving end, the target spot coverage area, and the emission power of a single laser emitting diode module;

[0012] Determine the topological structure of the fan-out module according to the number, and drive the corresponding number of laser emitting diode modules to emit laser.

[0013] The present application also provides an electronic device, including: a memory for storing a computer program; a processor for implementing the steps of any one of the above communication transmission methods when executing the computer program.

[0014] The present application also provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the steps of any one of the above communication transmission methods are implemented.

[0015] The present application also provides a computer program product, including a computer program. When the computer program is executed by a processor, the steps of any one of the above communication transmission methods are implemented.

[0016] Through the present application, the control module outputs a single differential serial signal and a laser power control signal, and then uses the signal fan-out module to fan out the differential serial signal to multiple laser emitting diode modules. Each laser emitting diode module emits laser according to the signal received by itself, and the spots corresponding to the lasers emitted by the multiple laser emitting diodes overlap, thereby realizing multi-laser parallel emission. The overall effective emission power is significantly improved, effectively making up for the problem of limited power of a single laser emitting diode. Even in long-distance transmission, a relatively high received optical power can be ensured, the signal-to-noise ratio is improved, and the bit error rate is reduced, thereby solving the technical problem of the decline in communication quality due to limited emission power in the prior art. Description of the Drawings

[0017] In order to more clearly illustrate the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 This is a schematic diagram of the principle of a communication transmission device provided by the present invention;

[0019] Figure 2 This is a schematic diagram of the principle of a fan-out module provided by the present invention;

[0020] Figure 3 This is a schematic diagram of the principle of a laser emitting diode module provided by the present invention;

[0021] Figure 4 This is a schematic structural diagram of a single laser emitting diode module provided by the present invention;

[0022] Figure 5 This is a schematic diagram of a laser emission circuit module provided by the present invention;

[0023] Figure 6 This is a flowchart of a laser emission method provided by the present invention;

[0024] Figure 7 This is a schematic layout diagram of a laser emitting diode module group provided by the present invention;

[0025] Figure 8 This is a schematic diagram of the spot coverage of laser communication transmission provided by the present invention. Detailed implementation manners

[0026] The core of the present invention is to provide a communication transmission device, method, equipment, storage medium and program product, which realizes multi-laser parallel emission, significantly improves the overall effective emission power, effectively makes up for the problem of limited power of a single laser emitting diode, and solves the technical problem of the decline in communication quality due to limited emission power in the prior art.

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] Such as Figure 1As shown in the figure, the present application provides a communication transmitting device, which is arranged at a communication transmitting end and includes: a control module, including a signal output end and a control output end, for converting communication data into a single differential serial signal, outputting the differential serial signal through its own signal output end, and outputting a laser power control signal through its own control output end; a fan-out module, whose signal input end is connected to the signal output end of the control module, for fan-out a single differential serial signal into multiple differential serial signals with the same phase; a plurality of laser emitting diode modules, whose signal input ends are correspondingly connected to the multiple signal output ends of the fan-out module, and whose control input ends are connected to the control output end of the control module. Each laser emitting diode module is used to adjust the power of the laser emitted by itself and emit the laser according to the laser power control signal under the drive of the differential serial signal, and the light spots corresponding to the lasers emitted by the plurality of laser emitting diode modules overlap.

[0029] This embodiment describes a communication transmitting device, aiming to achieve efficient and stable laser communication through multiple laser emitting diode modules. The device includes three main parts: a control module, a fan-out module, and a plurality of laser emitting diode modules. First, the control module converts communication data into a single differential serial signal and sends the signal to the fan-out module through the signal output end. At the same time, the control module outputs a laser power control signal through the control output end to adjust the emission power of the laser. After receiving the differential serial signal from the control module, the fan-out module fan-outs it into multiple differential serial signals with the same phase, so that multiple laser emitting diode modules can be driven to work simultaneously. The signal received by each laser emitting diode module is transmitted from its signal input end, and the power of the emitted laser is adjusted according to the laser power control signal sent by the control module. Finally, the plurality of laser emitting diode modules emit lasers simultaneously, and the light spots corresponding to the lasers emitted by the plurality of laser emitting diode modules overlap, thereby improving the intensity and stability of the communication signal.

[0030] In this way, the problem of limited emission power of a single laser emitting diode can be overcome, the effective transmission distance of laser communication can be increased, the anti-interference ability of the system can be enhanced, and at the same time, problems such as the decline of communication quality and the increase of bit error rate caused by traditional single emission devices can be avoided. The core principle of the device is to use the fan-out module to parallelly transmit the differential serial signal to multiple laser emitting diode modules, forming multiple laser concurrent emissions, thereby achieving power improvement and communication quality optimization.

[0031] As Figure 2As shown, in an exemplary embodiment, the fan-out module includes n levels of fan-out devices, where n ≥ 1 and n is an integer. The fan-out devices include multiple fan-out channels. The signal input end of the fan-out device at the first level is connected to the signal output end of the control module. When n ≥ 2, the signal input end of the fan-out device at the nth level is connected to one of the fan-out ends of the fan-out device at the (n - 1)th level. The fan-out ends of the fan-out device at the last level are correspondingly connected to the signal input ends of multiple laser diode modules. The total number of fan-out ends of all fan-out devices at the last level is not less than the number of working laser diode modules. The phases of the multiple differential serial signals fanned out by the fan-out devices at the same level are the same.

[0032] In this embodiment, the fan-out module realizes the distribution of the differential serial signal output by the control module to multiple laser diode modules through multiple cascaded fan-out devices. Specifically, the fan-out device at the first level receives the differential serial signal from the control module and outputs the differential serial signal through multiple fan-out ends of the fan-out device at the first level. Next, the signal input end of the fan-out device at the nth level is connected to one of the fan-out ends of the fan-out device at the (n - 1)th level, and the signal is continuously distributed level by level until the fan-out device at the last level. The fan-out ends of this fan-out device are correspondingly connected to the signal input ends of multiple laser diode modules one by one. This cascaded fan-out method enables a single signal source to drive multiple laser diode modules, thereby realizing the parallel emission of multiple laser sources and solving the problem of limited power of a single laser diode. As Figure 2 shown, the fan-out end (or fan-out channel) of the fan-out device at the first level has J Figure 2 which are internal links 1.1 to internal link 1.J. The fan-out end (or fan-out channel) of each fan-out device at the second level has K Figure 2 which are internal links 2.1 to internal link 2.K... until 2.JK + K + 1... 2.JK; similarly, each fan-out device at the third level includes L fan-out ends, which will not be elaborated here.

[0033] To ensure that the light spots corresponding to the lasers emitted by each laser diode module can be effectively superimposed and the overall emission power can be increased, the multiple differential serial signals fanned out by all the fan-out devices at the same level need to maintain the same phase. If the phases of these signals are different, the lasers generated by the laser diode modules will undergo phase cancellation in space, resulting in the weakening of the superimposed laser power and thus reducing the quality of the communication signal. By ensuring that the signals fanned out by the fan-out devices at the same level maintain the same phase, it can be guaranteed that the light spots corresponding to the laser signals emitted by multiple laser diode modules are correctly superimposed at the receiving end, thereby increasing the overall emission power and communication effect, avoiding power loss, and enhancing the stability and reliability of the laser communication link. The total number of fan-out ends of the fan-out devices at the last level is not less than the number of laser diode modules, ensuring that all laser emission modules can receive effective signals and operate as expected.

[0034] In this embodiment, the number of fan-out channels during different fan-out periods can be the same or different, and the specific setting depends on multiple factors. First, if the power balance requirement of the system is considered, the number of fan-out channels of each fan-out device can be set to be the same to ensure that each laser diode module receives the same signal intensity and power, avoiding affecting the stability and communication quality of the system due to uneven signal distribution. This method helps to simplify the system design, making each signal path have the same transmission characteristics, thereby ensuring that the output power and signal quality of all laser diode modules are the same, which is conducive to the unified superposition of signals.

[0035] However, if the different requirements for communication distance and light spot coverage area are considered, the number of fan-out channels during different fan-out periods can be set to be different. For example, in some segmented intervals, more laser diode modules may be required to meet the longer transmission distance and larger light spot coverage area. Therefore, more fan-out channels can be set on the fan-out devices in these intervals to provide stronger laser power; while in other intervals with shorter distances, fewer laser diode modules and fewer fan-out channels may be sufficient. This flexible design can be adjusted according to the actual communication requirements and environmental changes to ensure that the system can still maintain stable performance and efficient signal transmission under different communication distances and different emission power requirements.

[0036] In summary, the setting of the number of fan-out channels can be optimized according to multiple factors such as the power balance requirement of the system, communication distance, and light spot coverage area. One can choose the same number of fan-out channels to ensure balance, or flexibly adjust the number of fan-out channels according to actual needs to meet different communication requirements.

[0037] Such as Figure 3As shown, in an exemplary embodiment, each laser diode module includes: a laser driving module, whose input end is connected to the signal output end of the fan-out module and is used to convert the differential serial signal into a driving current; a laser diode, whose driving end is connected to the output end of the laser driving module and whose control end is connected to the control output end of the control module, and is used to adjust the power of the laser emitted in the form of a point light source according to the laser power control signal and emit the laser under the drive of the driving current; a collimating lens, whose optical axis center is coaxial with the light-emitting center of the laser diode, and is used to convert the laser from the form of a point light source into a parallel light beam.

[0038] In this embodiment, the working principle of each laser diode module is as follows: after the laser driving module receives the differential serial signal from the signal output end of the fan-out module, it converts the differential serial signal into a driving current, and the driving current changes with the change of the differential serial signal and is used to activate the working state of the laser diode; the laser diode adjusts its own emission power according to the input driving current and the laser power control signal, so that it can adaptively adjust the power under different communication conditions to ensure the quality and stability of communication.

[0039] In order to ensure that the emitted laser has good propagation performance and directivity, the collimating lens is used to convert the laser from the form of a point light source of the laser diode into a parallel light beam. The optical axis center of the collimating lens is coaxial with the light-emitting center of the laser diode, ensuring that the laser can form a parallel light beam through the adjustment of the lens after emitting from the diode, avoiding the divergence or uneven distribution of the light beam, thereby improving the transmission efficiency of the laser, reducing the loss in long-distance transmission, and ensuring that the laser can accurately reach the receiving end. Through this combination, the laser diode module can not only dynamically adjust the laser power according to the signal, but also optimize the light beam shape through the collimating lens, thereby improving the overall performance of the laser communication system.

[0040] In an exemplary embodiment, each laser diode module further includes: a position adjustment structure, on which at least a laser diode and a collimating lens are arranged, and is used to adjust the distance between the first plane where the optical axis center of the collimating lens is located and the second plane where the light-emitting center of the laser diode is located according to the size of the target light spot to be covered by the laser diode, and both the first plane and the second plane are perpendicular to the optical link.

[0041] In the prior art, the transmitting end using a single laser light source and additional optical components is usually designed to adapt to a specific communication distance and light spot coverage range, which makes the structures of these systems relatively complex and unable to flexibly adjust the optical components. When the receiving end moves away from the light spot coverage range of the transmitting end, it usually causes the optical link to be disconnected, thereby resulting in communication interruption. It can be seen that the size of the light spot in the laser communication system directly affects the coverage range of the laser and the receiving quality of the signal.

[0042] In this embodiment, each laser diode module further includes a position adjustment structure, on which at least a laser diode and a collimating lens are mounted. The design of the position adjustment structure can adjust the distance between the first plane where the optical axis center of the collimating lens is located and the second plane where the light emitting center of the laser diode is located, thereby adjusting the spot size covered by the laser diode, and solving the problem caused by the inability to flexibly adjust the spot size in the laser communication system.

[0043] Specifically, in this embodiment, the position adjustment structure enables the collimating lens to be position-adjusted according to actual needs, flexibly adjusting the spot size, so as to ensure that the laser always covers the receiving end. Even when the position of the receiving end changes, signal loss and communication interruption can be avoided. As Figure 4 and Figure 5 shown, among which, Figure 4 the laser emission circuit module in Figure 5 at least includes a laser driving module, a PCB circuit board, and a laser diode. The position adjustment structure can be but is not limited to being implemented by a metal housing structure. The external thread of the collimating lens is connected to the internal thread of the metal structure. By rotating the collimating lens clockwise or counterclockwise, the distance between the first plane where the optical axis center of the collimating lens is located and the second plane where the light emitting center of the laser diode is located can be precisely adjusted, so that the spot size can be dynamically changed to adapt to different communication scenarios. The laser driving module is arranged on the PCB circuit board, and the laser diode is connected to the laser driving module through the PCB circuit board.

[0044] This adjustment mechanism enables the optical components to be flexibly adjusted according to actual needs, solves the limitation of the traditional fixed spot range, and enhances the adaptability and stability of the system, thereby greatly improving the reliability of the optical link and the communication quality.

[0045] As Figure 6 shown, the present application also provides a communication transmission method. Based on the above communication transmission device, the communication transmission method includes:

[0046] S11: Determine the target spot coverage area according to the maximum movement range of the communication receiving end on the plane perpendicular to the optical link. The target spot coverage area is the spot area that a single laser diode module needs to cover;

[0047] In this step, first, the target spot coverage area S needs to be determined according to the maximum movement range of the communication receiving end on the plane of the vertical optical link. The maximum movement range refers to the widest range of movement that the receiving end may exhibit during communication, and this maximum movement range affects the distribution of the light beam in space and the ability of the receiving end to receive the laser. To ensure that the receiving end can receive sufficient optical signals throughout the maximum movement range, the target spot coverage area S is set as the minimum area that a single laser diode module needs to cover, ensuring that the laser spot can cover the entire active area of the communication receiving end. Specifically, the target spot coverage area S is not less than the area corresponding to the maximum movement range, which means that the size of the spot must be able to cover at least the farthest positions that the communication receiving end may reach within the maximum movement range, thereby ensuring that sufficient optical power can be stably received at any position of the receiving end and avoiding communication interruption or excessive signal attenuation.

[0048] S12: Determine the number of laser diode modules required according to the target laser power requirement of the communication receiving end, the target spot coverage area, and the emission power of a single laser diode module;

[0049] In this step, the target laser power requirement Pr reflects the minimum received optical power required by the receiving end under specific distances and environmental conditions to ensure sufficient signal-to-noise ratio and thus avoid an excessive bit error rate. Since the spot area that each laser diode module needs to cover is the target spot coverage area S, and the target spot areas S of these laser diode modules are the same, therefore, when determining the number of laser diode modules required, calculate how many laser diode modules are needed to cover the entire communication area and meet the laser power requirement of the receiving end based on the target spot coverage area S and the emission power Pt of each laser diode module. That is to say, if the power of a single module is insufficient to meet the target power requirement, more laser diode modules need to be added to work together.

[0050] Through the above, the number of laser diode modules required can be calculated to ensure that the laser emission modules in each segmented interval can meet the power requirement of communication and cover the target spot coverage area S, thereby ensuring the intensity and stability of the signal and avoiding communication quality problems caused by insufficient emission power.

[0051] S13: Determine the topology of the fan-out module according to the quantity and drive the corresponding number of laser diode modules to emit laser light.

[0052] In this step, based on the number of required laser diode modules determined previously, the topology of the fan-out module is determined to ensure that each laser diode module can receive the correct differential serial signal and emit laser light as required. This topology determines how the differential serial signal is transmitted from the control module to multiple laser diode modules and ensures that each laser diode module receives the differential serial signal in the same phase, ensuring that they correctly adjust the laser power and emission state according to the received differential serial signal in the same phase. At the same time, drive these laser diode modules to emit laser light, and through synchronous laser emission, form a stable optical signal coverage within the target spot coverage area S to ensure the quality and reliability of the entire communication link. In this way, it is ensured that each laser diode module emits laser light at the correct time and power.

[0053] As Figure 7 shown, in an exemplary embodiment, multiple laser diode modules are divided into multiple groups; the communication transmission method further includes: determining the minimum communication distance D and the mobile coverage distance R between the communication transmitting end and the communication receiving end according to the communication distance requirement; the mobile coverage distance R is used to characterize the distance covered during the movement when the communication receiving end moves relative to the communication transmitting end; according to the target laser power requirement Pr of the communication receiving end, the target spot coverage area S, and the emission power Pt of a single laser diode module, determining the number of required laser diode modules, including: calculating the coverage distance dn of each group of laser diode modules according to the minimum communication distance D, the target spot coverage area S, and the preset extended spot coverage area S1; dividing the mobile coverage distance R into multiple segmented intervals according to the coverage distance of each group of laser diode modules; the multiple coverage distances dn are connected end to end in sequence and the sum value of the multiple coverage distances dn is not less than the mobile coverage distance R; for each segmented interval, determining the number Ln of laser diode modules required for the segmented interval according to the target laser power requirement Pr and the emission power Pt of the single laser diode module corresponding to the segmented interval; calculating the total number of laser diode modules required for all segmented intervals; correspondingly, determining the topology of the fan-out module according to the number, including: determining the topology of the fan-out module according to the total number.

[0054] In this exemplary embodiment, multiple laser emitting diode modules are divided into multiple groups (each group includes at least one laser emitting diode module) to achieve more refined and efficient laser signal coverage. The core of the communication transmission method is that in long-distance communication, even if the receiving end moves, the laser communication system can provide stable signal coverage. First, determine the minimum communication distance D and the moving coverage distance R according to the communication distance requirement, where the minimum communication distance D refers to the shortest effective communication distance between the communication transmitting end and the receiving end, and the moving coverage distance R represents the maximum distance covered by the communication receiving end during movement. This distance is used to ensure that communication can remain stable even if the communication receiving end is displaced.

[0055] Next, calculate the number of required laser emitting diode modules according to the target laser power requirement Pr, the target spot coverage area S, and the emission power Pt of a single laser diode module of the communication receiving end. Through this step, it is necessary to calculate the coverage distance dn of each group of laser emitting diode modules according to the minimum communication distance D, the target spot coverage area S, and the preset extended spot coverage area S1. S1 and S are the spot areas covered by the same laser beam emitted by the same group of laser emitting diode modules on planes at different distances. The preset extended spot coverage area S1 is calculated by a preset coefficient (the preset coefficient is obtained based on experience). Usually, the area of S1 is times that of S (that is, S1 = S × , greater than 1), representing a suitable extension range to ensure that the transmission effect of the laser signal is optimal between S and S1. Next, divide the moving coverage distance R into multiple segmented intervals according to the coverage distance dn of each group of laser emitting diode modules (that is, the distance between S and S1). The coverage distances dn corresponding to these segmented intervals are connected end to end (for example, the coverage range of the beam of the first group of laser emitting diodes is D + d1, the coverage range of the beam of the second group of laser emitting diodes is D + d1 + d2, the coverage range of the beam of the third group of laser emitting diodes is D + d1 + d2 + d3, and so on). The sum of multiple coverage distances dn is not less than the moving coverage distance R to ensure that the laser signal can seamlessly cover all positions during the entire movement.

[0056] Then, for each segmented interval, based on the target laser power requirement Pr and the emission power Pt of the corresponding laser diode module within each segmented interval, calculate the number Ln of laser diode modules required for this segmented interval. Finally, calculate the total number of laser diode modules required for all segmented intervals, and determine the topology of the fan-out module based on this total number to ensure that the signal can be effectively distributed to all laser emission modules. The topology of the fan-out module determines how the signal is transmitted from the control module to the laser emission module, ensuring that each module can operate at the correct time and power.

[0057] Through this series of calculations and designs, the number and distribution of the laser emission modules can be flexibly adjusted to ensure that the long-distance communication between the communication transmitting end and the receiving end always maintains efficient and stable signal coverage, avoiding signal attenuation or communication interruption caused by the movement of the receiving end or excessive distance.

[0058] In an exemplary embodiment, according to the minimum communication distance D, the target spot coverage area S, and the preset extended spot coverage area S1, calculate the coverage distance dn of each group of laser diode modules, including: according to the target spot coverage area S and the minimum communication distance D, calculate the laser divergence angle θ of the first group of laser diode modules; according to the extended light plate coverage area S1 and the laser divergence angle θ, calculate the first coverage distance d1 of the first group of laser diode modules; when n ≥ 2, according to the target spot coverage area S, the minimum communication distance D, and the previous n - 1 coverage distances, calculate the nth coverage distance dn of the nth group of laser diode modules; calculate the sum value of the n coverage distances until the sum value is not less than the moving coverage distance R. It should be understood that n ≥ 1 and n is an integer. Only when n ≥ 2, it is necessary to execute the calculation of the nth coverage distance dn of the nth group of laser diode modules according to the target spot coverage area S, the minimum communication distance D, and the previous n - 1 coverage distances. In this embodiment, the process of calculating the coverage distance dn of each group of laser diode modules is mainly to ensure that the laser diode modules can provide sufficient signal coverage during the communication process. First, according to the target spot coverage area S and the minimum communication distance D, calculate the laser divergence angle of the first group of laser diode modules (The specific formula is ). (The laser divergence angle θ here can be as Figure 8 shown). The laser divergence angle refers to the diffusion angle of the laser beam after it is emitted from the laser source. This laser divergence angle is related to the size of the spot and the communication distance. The relationship between the target spot area S and the minimum communication distance D determines the degree of laser divergence. By calculating this angle, the propagation characteristics of the laser beam can be further determined.

[0059] Next, according to the extended spot coverage area S1 and the laser divergence angle , the first coverage distance d1 of the first group of laser diode modules is calculated. The expanded spot area S1 is defined here as a multiple of the target spot area S (i.e., the multiple is ), which represents the maximum effective area covered by the laser signal. Combining with the laser divergence angle , the distance d1 that the first group of laser emission modules can effectively cover can be calculated. This is the coverage distance of this group of laser diode modules. That is, when the spot expands to this coverage distance, sufficient signal strength can still be ensured (since is obtained from S and D, so d1 is also obtained from S, D, and S1 equivalently. The specific formula can be: ).

[0060] For subsequent groups (i.e., when n ≥ 2), according to the target spot coverage area S, the minimum communication distance D, and the first n - 1 coverage distances, the nth coverage distance dn of the nth group of laser diode modules is calculated. This step is to ensure that when gradually increasing the laser emission modules, the coverage range of each group of laser emission modules can be connected to the coverage range of the previous modules to form continuous signal coverage, avoiding signal gaps or overlapping areas. Finally, by calculating the sum of all n coverage distances until the sum is not less than the mobile coverage distance R, which is the maximum movement range of the receiving end during the entire communication process. This value ensures that no matter how the receiving end moves, the laser signal can stably cover the entire movement range, guaranteeing the continuity and reliability of laser communication. The specific formula for calculating the nth coverage distance is: , the calculation method of the number Ln of the nth group of laser diode modules is: first calculate the result of (Pr × S1) / Pt, and then round up the calculation result to get an integer. Ln should be greater than or equal to this integer.

[0061] By this method of gradually calculating the coverage distance and accumulating, the configuration of the laser emission modules can be optimized to ensure stable signal transmission under different communication distances and environmental conditions.

[0062] In an exemplary embodiment, the fan - out module includes n - stage fan - out devices, where n ≥ 1 and n is an integer. The fan - out device includes multiple fan - out channels; the topology of the fan - out module is determined according to the total quantity, including: determining the cascading layer number of the fan - out module according to the total quantity and the number of fan - out channels supported by each fan - out device. Specifically, in an exemplary embodiment, according to M U-1 ≤N≤M U the cascading layer number of the fan - out module is determined, where M is the number of fan - out channels supported by each fan - out device, U is the cascading layer number, and N is the total quantity.

[0063] In this embodiment, when the fan-out module includes multiple fan-out devices, each fan-out device contains multiple fan-out channels, and these fan-out devices are connected in a cascaded manner. The purpose of the cascaded structure is to effectively distribute the signals from the control module to multiple laser diode modules, so as to achieve the synchronous operation of multiple laser modules. The topological structure of the fan-out module is determined according to the total number of required laser diode modules. First, according to the total number N (i.e., the total number of laser diode modules to be driven) and the number of fan-out channels M supported by each fan-out device, the required cascaded layer number U of the fan-out module is determined. Specifically, the formula M U-1 ≤N≤M U is used to calculate the required number of cascaded layers. Through a reasonable cascaded structure, it can be ensured that there is no loss in signal transmission, meeting the required power and coverage requirements.

[0064] In an exemplary embodiment, it further includes: calculating the i-th divergence angle of the i-th group of laser diodes according to the first i - 1 coverage distances, the minimum communication distance D, and the target spot coverage area S; adjusting the distance between the first plane where the optical axis center of the collimating lens is located and the second plane where the light-emitting center of the i-th group of laser diodes is located according to the i-th divergence angle, so that the spot area of the laser emitted by the i-th group of laser diodes at the i-th divergence angle on the plane where the starting point of the i-th coverage distance is located is the target spot coverage area S; both the first plane and the second plane are perpendicular to the optical link.

[0065] In this embodiment, by calculating and adjusting multiple parameters, the spot coverage area of the laser diode is optimized to ensure that the laser signal can provide stable and sufficient coverage throughout the communication distance. First, the i-th divergence angle of the i-th group of laser diodes is calculated according to the first i - 1 coverage distances, the minimum communication distance D, and the target spot coverage area S. The divergence angle is the angle at which the laser spreads after emitting from the emitting diode, and its size determines the size and propagation range of the spot. Through the accumulation of the first i - 1 coverage distances, combined with the minimum communication distance D and the target spot area S, the specific divergence angle of the i-th group of laser diodes can be calculated to ensure that the spot emitted by the laser emitting module within its specified coverage distance meets the expected coverage requirements.

[0066] Next, adjust the distance between the first plane where the optical axis center of the collimating lens is located and the second plane where the light-emitting center of the i-th group of laser diodes is located according to the i-th divergence angle. The function of the collimating lens is to convert the laser beam from a point source into a parallel beam, and adjusting the position of the collimating lens is to ensure that the propagation path of the laser and the size of the light spot meet the target requirements. Specifically, the first plane and the second plane respectively represent the first plane where the optical axis center of the collimating lens is located and the second plane where the light-emitting center of the laser diode is located, and they are both perpendicular to the optical link. By adjusting the distance between these two planes, the focusing effect of the collimating lens on the laser can be changed, so that the light spot area of the laser emitted by the i-th group of laser diodes at the i-th divergence angle on the plane where the starting point of the i-th coverage distance is located is the target light spot coverage area S.

[0067] This adjustment ensures that the emission power of the laser can cover the receiving end within different distance ranges, and the size of the light spot always meets the communication requirements, avoiding the situation of too small or too large light spots, thus ensuring the quality and stability of the communication signal. By precisely adjusting the position of the collimating lens, the system can flexibly respond to different distance and light spot requirements, ensuring the efficient operation of the optical link.

[0068] This application also provides an electronic device, including: a memory for storing a computer program; a processor for implementing the steps of any of the above communication transmission methods when executing the computer program.

[0069] For the description of the features in the corresponding embodiments of the electronic device, reference can be made to the relevant descriptions of the corresponding embodiments of the communication transmission method, which will not be elaborated here one by one.

[0070] This application also provides a computer-readable storage medium, in which a computer program is stored, and when the computer program is executed by a processor, the steps of any of the above communication transmission methods are implemented.

[0071] In an exemplary embodiment, the above computer-readable storage medium may include, but is not limited to: USB flash drives, read-only memories (ROM for short), random access memories (RAM for short), mobile hard disks, magnetic disks, or optical discs and other various media that can store computer programs.

[0072] For the description of the features in the corresponding embodiments of the non-volatile storage medium, reference can be made to the relevant descriptions of the corresponding embodiments of the communication transmission method, which will not be elaborated here one by one.

[0073] This application also provides a computer program product, including a computer program, and when the computer program is executed by a processor, the steps of any of the above communication transmission methods are implemented.

[0074] For the description of the features in the embodiments corresponding to the computer program product, reference can be made to the relevant description of the embodiments corresponding to the communication transmission method, which will not be elaborated here one by one.

[0075] It should also be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0076] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A communication transmitting device, characterized in that: Set at the communication transmitting end, including: A control module, including a signal output terminal and a control output terminal, for converting communication data into a single differential serial signal, outputting the differential serial signal through its own signal output terminal, and outputting a laser power control signal through its own control output terminal; A fan-out module, whose signal input end is connected to the signal output end of the control module, is used to fan out a single differential serial signal into multiple differential serial signals with the same phase; A plurality of laser emitting diode modules, whose signal input ends are correspondingly connected to the plurality of signal output ends of the fan-out module, and whose control input ends are connected to the control output ends of the control module. Each of the laser emitting diode modules is used to adjust the power of the laser emitted by itself and emit laser according to the laser power control signal under the drive of the differential serial signal. The light spots corresponding to the lasers emitted by the plurality of laser emitting diode modules overlap.

2. The communication transmitting device according to claim 1, characterized in that: Each of the laser emitting diode modules comprises: A laser driving module, whose input end is connected to the signal output end of the fan-out module, and is used to convert the differential serial signal into a driving current; A laser emitting diode, whose driving end is connected to the output end of the laser driving module, and whose control end is connected to the control output end of the control module, is used to adjust the power of emitting laser in the form of a point light source and emit laser according to the laser power control signal under the drive of the driving current; The collimating lens has an optical axis center coaxial with the light emitting center of the laser emitting diode and is used to convert the laser from a point light source into a parallel light beam.

3. The communication transmitting device as claimed in claim 2, characterized in that: Each of the laser emitting diode modules further comprises: A position adjustment structure, on which at least the laser emitting diode and the collimating lens are arranged, is used to adjust the distance between a first plane where the optical axis center of the collimating lens is located and a second plane where the light emitting center of the laser emitting diode is located according to the target spot size that the laser emitting diode needs to cover, wherein the first plane and the second plane are both perpendicular to the optical link.

4. The communication transmitting device according to any one of claims 1 to 3, characterized in that: The fan-out module includes n levels of fan-out devices, n≥1, and n is an integer; the fan-out device includes multiple fan-out channels, the signal input end of the first level fan-out device is connected to the signal output end of the control module, when n≥2, the signal input end of the n-th level fan-out device is connected to one of the fan-out ends of the n-1-th level fan-out device, and the fan-out end of the last level fan-out device is correspondingly connected to the signal input ends of the multiple laser emitting diode modules; The total number of fan-out ends of all fan-out devices at the last stage is not less than the number of operating laser emitting diode modules, and the phases of multiple differential serial signals fanned out by the fan-out devices at the same stage are the same.

5. A communication transmission method, characterized in that: Based on the communication transmitting device according to any one of claims 1 to 4, the communication transmitting method comprises: Determine the target light spot coverage area according to the maximum movement range of the communication receiving end on the plane perpendicular to the optical link, wherein the target light spot coverage area is the light spot area required to be covered by a single laser emitting diode module; Determining the number of required laser emitting diode modules according to the target laser power requirement of the communication receiving end, the target spot coverage area, and the emission power of a single laser emitting diode module; The topology of the fan-out module is determined according to the quantity, and a corresponding number of laser emitting diode modules are driven to emit lasers.

6. The communication transmission method according to claim 5, characterized in that: The plurality of laser emitting diode modules are divided into a plurality of groups; the communication transmission method further comprises: Determine the minimum communication distance and mobile coverage distance between the communication transmitting end and the communication receiving end according to the communication distance requirement; the mobile coverage distance is used to characterize the distance covered during the movement when the communication receiving end moves relative to the communication transmitting end; Accordingly, the number of required laser emitting diode modules is determined according to the target laser power requirement of the communication receiving end, the target spot coverage area, and the emission power of a single laser emitting diode module, including: Calculate the coverage distance of each group of laser emitting diode modules according to the minimum communication distance, the target light spot coverage area, and the preset extended light spot coverage area; The mobile coverage distance is divided into a plurality of segmented intervals according to the coverage distance of each group of laser emitting diode modules; the plurality of coverage distances are connected end to end in sequence and the sum of the plurality of coverage distances is not less than the mobile coverage distance; For each of the segmented intervals, according to the target laser power requirement and the emission power of a single laser emitting diode module corresponding to the segmented interval, determine the number of laser emitting diode modules required for the segmented interval; Calculate the total number of laser emitting diode modules required for all segment intervals; Accordingly, determining the topology of the fan-out module according to the quantity includes: A topology structure of the fan-out module is determined according to the total number.

7. The communication transmission method according to claim 6, characterized in that: According to the minimum communication distance, the target spot coverage area, and the preset extended spot coverage area, the coverage distance of each group of laser emitting diode modules is calculated, including: Calculating the laser divergence angle of the first group of laser emitting diode modules according to the target light spot coverage area and the minimum communication distance; Calculating a first coverage distance of a first group of laser emitting diode modules according to the preset extended light spot coverage area and the laser divergence angle; When n≥2, the nth coverage distance of the nth group of laser emitting diode modules is calculated according to the target spot coverage area, the minimum communication distance, and the first n-1 coverage distances; The sum of n coverage distances is calculated until the sum is no less than the moving coverage distance.

8. The communication transmission method according to claim 6, characterized in that: The fan-out module includes n-level fan-out devices, n≥1, n is an integer, and the fan-out device includes multiple fan-out channels; Determining a topological structure of the fan-out module according to the total number includes: The number of cascaded layers of the fan-out module is determined according to the total number and the number of fan-out channels supported by each of the fan-out devices.

9. The communication transmission method according to claim 8, characterized in that: Determining the number of cascaded layers of the fan-out module according to the total number and the number of fan-out channels supported by each of the fan-out devices includes: According to M U-1 ≤N≤M U Determine the number of cascade layers of the fan-out module, where M is the number of fan-out channels supported by each fan-out device, U is the number of cascade layers, and N is the total number.

10. The communication transmission method according to any one of claims 7 to 9, characterized in that: Also includes: Calculate the nth divergence angle of the nth group of laser emitting diode modules according to the first n-1 coverage distances, the minimum communication distance, and the target spot coverage area; According to the nth divergence angle, the distance between the first plane where the optical axis center of the collimating lens in each laser emitting diode module in the nth group of laser emitting diode modules is located and the second plane where the light emitting center of the corresponding laser emitting diode is located is adjusted, so that the spot area of ​​the laser emitted by the nth group of laser emitting diode modules at the nth divergence angle in the plane where the starting point of the nth coverage distance is located is the target spot coverage area.

11. An electronic device, characterized in that: include: Memory for storing computer programs; A processor, used to implement the steps of the communication transmission method as described in any one of claims 5 to 10 when executing a computer program.

12. A non-volatile storage medium, characterized in that: The non-volatile storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the communication transmission method according to any one of claims 5 to 10 are implemented.

13. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the communication transmission method according to any one of claims 5 to 10 are implemented.

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