A transmission method, device and communication equipment based on optical communication

Abstract

The present invention provides a transmission method, device and communication equipment based on optical communication, and relates to the field of communication technology. The method includes: receiving first zoom indication information from a receiving end for instructing the receiving end to perform zooming; adjusting the downlink transmission mode from a sending end to the receiving end according to the first zoom indication information; wherein the downlink transmission mode includes: radio frequency RF link transmission; optical link transmission; and RF link transmission and optical link transmission. In the scheme of the present invention, the sending end adjusts the downlink transmission mode during the process of performing zooming at the receiving end, and activates the corresponding communication mechanism by sensing the change of focal length, which can ensure that the ongoing communication will not be interrupted, and solves the problem of communication interruption caused by terminal focusing.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a transmission method, device and communication equipment based on optical communication. Background Art

[0002] Visible Light Communication (VLC) is a new type of wireless optical communication technology that uses light emitting diodes (LEDs) for communication. The transmitter in the VLC communication system is generally a single LED or an array of multiple LEDs. LEDs have high sensitivity and can transmit information by flashing signals at a speed that is indistinguishable to the human eye. Since the lighting effect of a single LED is limited and the modulation bandwidth is insufficient, it is difficult to meet the lighting and communication needs of the room. Therefore, in practical applications, LED array integration is usually adopted. Therefore, the rational use of the multiple input multiple output (MIMO) communication method of multiple LED arrays has become one of the important directions of VLC technology.

[0003] VLC-MIMO can be divided into non-imaging MIMO and imaging MIMO. For imaging MIMO, imaging MIMO uses an imaging convex lens to project the image of the LED array onto the receiving imaging sensor detector array. Due to the influence of user position, terminal device direction and mobility, it is impossible to always maintain a reasonable focal length in the imaging MIMO mode so that the LED image is always projected on all pixels. The terminal usually takes seconds to focus, which brings challenges to continuous high-speed communication. Summary of the invention

[0004] The purpose of the present invention is to provide a transmission method, device and communication equipment based on optical communication to solve the problem of communication interruption that may be caused when a terminal is focusing.

[0005] To achieve the above object, an embodiment of the present invention provides a transmission method based on optical communication, which is applied to a transmitting end and includes:

[0006] Receiving first zoom indication information from a receiving end for instructing the receiving end to perform zooming;

[0007] adjusting, according to the first zoom indication information, a downlink transmission mode from the transmitting end to the receiving end;

[0008] The downlink transmission modes include: radio frequency (RF) link transmission; optical link transmission; and RF link transmission and optical link transmission.

[0009] Optionally, the receiving first zoom indication information from the receiving end for instructing the receiving end to perform zooming includes:

[0010] Receive first zoom indication information sent by the receiving end through a radio frequency RF link and / or an optical link.

[0011] Optionally, adjusting the downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information includes:

[0012] The downlink transmission mode is adjusted from optical link transmission to RF link transmission.

[0013] Optionally, adjusting the downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information includes:

[0014] The downlink transmission mode is adjusted from optical link transmission using the first precoding array to optical link transmission using the second precoding array.

[0015] Optionally, the second precoding matrix is ​​generated by performing channel matrix measurement on a target pixel point;

[0016] The target pixel point is a pixel point that can be imaged currently.

[0017] Optionally, the second precoding matrix is ​​generated by performing channel matrix measurement on a first pixel point among the target pixel points;

[0018] The target pixel point is a pixel point that can be imaged currently.

[0019] Optionally, before adjusting the downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information, the method further includes:

[0020] Receive information of a target pixel sent by the receiving end, where the target pixel is a pixel that can be imaged currently.

[0021] Optionally, adjusting the downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information includes:

[0022] The downlink transmission mode is adjusted from optical link transmission to RF link transmission and optical link transmission.

[0023] Optionally, after adjusting the downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information, the method further includes:

[0024] Second zoom indication information is received from a receiving end, where the second zoom indication information indicates whether the zoom is completed.

[0025] Optionally, the receiving second zoom indication information from the receiving end includes:

[0026] Receive second zoom indication information sent by the receiving end through a radio frequency RF link and / or an optical link.

[0027] Optionally, after receiving first zoom indication information from the receiving end for instructing the receiving end to perform zooming, the method further includes:

[0028] Adjusting a first period of multiple-input multiple-output MIMO channel measurement feedback to a second period, where the second period is smaller than the first period;

[0029] After receiving the second zoom indication information from the receiving end, the method further includes:

[0030] According to the second zoom indication information, when the zoom is completed, the second period of the MIMO channel measurement feedback is adjusted to the first period.

[0031] Optionally, after receiving the second zoom indication information from the receiving end, the method further includes:

[0032] According to the second zoom indication information, when zooming is completed, performing channel matrix measurement to generate a third precoding matrix;

[0033] The optical link of the third precoding array is used for downlink transmission.

[0034] Optionally, after using the optical link of the third precoding array for downlink transmission, the method further includes:

[0035] Stop using the RF link for downlink transmission.

[0036] To achieve the above object, an embodiment of the present invention provides a transmission method based on optical communication, which is applied to a receiving end and includes:

[0037] Perform zoom determination;

[0038] According to the result of the zoom determination, first zoom instruction information for instructing the receiving end to perform zoom is sent to the sending end.

[0039] Optionally, the performing zoom determination includes:

[0040] detecting an imaging state of an imaging detector array;

[0041] When the imaging state changes from the first imaging state to the second imaging state, determining to trigger zooming;

[0042] Wherein, in the first imaging state, all pixels of the receiving end receive the image of the transmitting end;

[0043] In the second imaging state, some pixels of the receiving end receive the image of the transmitting end.

[0044] Optionally, after determining that zoom is triggered, the method further includes:

[0045] Perform zoom operation;

[0046] After the zoom is completed, second zoom indication information is sent to the sending end, where the second zoom indication information indicates whether the zoom is completed.

[0047] Optionally, sending the second zoom indication information to the sending end includes:

[0048] The second zoom indication information is sent to the transmitting end via a radio frequency RF link and / or an optical link.

[0049] Optionally, sending first zoom indication information according to a result of the zoom determination includes:

[0050] In the case where the result of the zoom determination indicates that zoom is triggered, the first zoom indication information is sent to the transmitting end via an RF link and / or an optical link.

[0051] Optionally, after performing zoom determination, the method further includes:

[0052] The information of the target pixel point is sent to the sending end, where the target pixel point is the pixel point that can be imaged currently.

[0053] To achieve the above object, an embodiment of the present invention provides a transmission device based on optical communication, comprising:

[0054] A first receiving module, used for receiving first zoom indication information from a receiving end for instructing the receiving end to perform zooming;

[0055] A processing module, configured to adjust a downlink transmission mode from a transmitting end to the receiving end according to the first zoom indication information;

[0056] The downlink transmission modes include: radio frequency (RF) link transmission; optical link transmission; and RF link transmission and optical link transmission.

[0057] Optionally, the first receiving module is specifically used to: receive first zoom indication information sent by the receiving end via a radio frequency RF link and / or an optical link.

[0058] Optionally, the processing module includes:

[0059] The first processing unit is used to adjust the downlink transmission mode from optical link transmission to RF link transmission.

[0060] Optionally, the processing module includes:

[0061] The second processing unit is used to adjust the downlink transmission mode from optical link transmission using the first precoding array to optical link transmission using the second precoding array.

[0062] Optionally, the second precoding matrix is ​​generated by performing channel matrix measurement on a target pixel point;

[0063] The target pixel point is a pixel point that can be imaged currently.

[0064] Optionally, the second precoding matrix is ​​generated by performing channel matrix measurement on a first pixel point among the target pixel points;

[0065] The target pixel point is a pixel point that can be imaged currently.

[0066] Optionally, the transmission device further includes:

[0067] The second receiving module is used to receive the information of the target pixel point sent by the receiving end, and the target pixel point is the pixel point that can be imaged currently.

[0068] Optionally, the processing module includes:

[0069] The third processing unit is used to adjust the downlink transmission mode from optical link transmission to RF link transmission and optical link transmission.

[0070] Optionally, the transmission device further includes:

[0071] The third receiving module is used to receive second zoom indication information from the receiving end, where the second zoom indication information indicates whether the zoom is completed.

[0072] Optionally, the third receiving module is specifically used to: receive second zoom indication information sent by the receiving end via a radio frequency RF link and / or an optical link.

[0073] Optionally, the transmission device further includes:

[0074] A second processing module, configured to adjust a first period of multiple-input multiple-output MIMO channel measurement feedback to a second period, wherein the second period is smaller than the first period;

[0075] The third processing module is used to adjust the second period of the MIMO channel measurement feedback to the first period when the zoom is completed according to the second zoom indication information.

[0076] Optionally, the transmission device further includes:

[0077] A measurement module, configured to perform channel matrix measurement and generate a third precoding matrix according to the second zoom indication information when zooming is completed;

[0078] A transmission module is used for performing downlink transmission using the optical link of the third precoding array.

[0079] Optionally, the transmission device further includes:

[0080] The fourth processing module is used to stop using the radio frequency RF link for downlink transmission.

[0081] To achieve the above object, an embodiment of the present invention provides a transmission device based on optical communication, comprising:

[0082] A determination module, used for performing zoom determination;

[0083] The first sending module is used to send first zoom indication information for instructing the receiving end to perform zooming to the sending end according to the result of the zoom determination.

[0084] Optionally, the determination module includes:

[0085] A detection unit, used to detect the imaging state of the imaging detector array;

[0086] A determination module, configured to determine that zoom is triggered when the imaging state changes from the first imaging state to the second imaging state;

[0087] Wherein, in the first imaging state, all pixels of the receiving end receive the image of the transmitting end;

[0088] In the second imaging state, some pixels of the receiving end receive the image of the transmitting end.

[0089] Optionally, the transmission device further includes:

[0090] A zoom module, used for performing a zoom operation;

[0091] The second sending module is used to send second zoom indication information to the sending end after the zoom is completed, where the second zoom indication information indicates whether the zoom is completed.

[0092] Optionally, the second sending module is specifically used to: send the second zoom indication information to the sending end via a radio frequency RF link and / or an optical link.

[0093] Optionally, the first sending module is specifically used to: when the result of the zoom determination indicates that zoom is triggered, send the first zoom indication information to the sending end via an RF link and / or an optical link.

[0094] Optionally, the transmission device further includes:

[0095] The third sending module is used to send information of a target pixel point to a sending end, where the target pixel point is a pixel point that can be imaged currently.

[0096] To achieve the above object, an embodiment of the present invention provides a communication device, which is a transmitting end and includes a processor and a transceiver, wherein:

[0097] The transceiver is used to receive first zoom indication information from a receiving end for instructing the receiving end to perform zooming;

[0098] The processor is used to adjust the downlink transmission mode from the sending end to the receiving end according to the first zoom indication information;

[0099] The downlink transmission modes include: radio frequency (RF) link transmission; optical link transmission; and RF link transmission and optical link transmission.

[0100] Optionally, when the transceiver receives the first zoom indication information from the receiving end for instructing the receiving end to perform zooming, it is specifically used to receive the first zoom indication information sent by the receiving end via a radio frequency RF link and / or an optical link.

[0101] Optionally, when the processor adjusts the downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information, it is specifically configured to:

[0102] The downlink transmission mode is adjusted from optical link transmission to RF link transmission.

[0103] Optionally, when the processor adjusts the downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information, it is specifically configured to:

[0104] The downlink transmission mode is adjusted from optical link transmission using the first precoding array to optical link transmission using the second precoding array.

[0105] Optionally, the second precoding matrix is ​​generated by performing channel matrix measurement on a target pixel point;

[0106] The target pixel point is a pixel point that can be imaged currently.

[0107] Optionally, the second precoding matrix is ​​generated by performing channel matrix measurement on a first pixel point among the target pixel points;

[0108] The target pixel point is a pixel point that can be imaged currently.

[0109] Optionally, the transceiver is further used to: receive information of a target pixel sent by the receiving end, where the target pixel is a pixel that can be imaged currently.

[0110] Optionally, when the processor adjusts the downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information, it is specifically configured to:

[0111] The downlink transmission mode is adjusted from optical link transmission to RF link transmission and optical link transmission.

[0112] Optionally, the transceiver is further used to: receive second zoom indication information from a receiving end, where the second zoom indication information indicates whether the zoom is completed.

[0113] Optionally, when receiving the second zoom indication information from the receiving end, the transceiver is specifically used to: receive the second zoom indication information sent by the receiving end via a radio frequency RF link and / or an optical link.

[0114] Optionally, the processor is further configured to:

[0115] Adjusting a first period of multiple-input multiple-output MIMO channel measurement feedback to a second period, where the second period is smaller than the first period;

[0116] According to the second zoom indication information, when the zoom is completed, the second period of the MIMO channel measurement feedback is adjusted to the first period.

[0117] Optionally, the processor is further configured to:

[0118] According to the second zoom indication information, when zooming is completed, performing channel matrix measurement to generate a third precoding matrix;

[0119] The optical link of the third precoding array is used for downlink transmission.

[0120] Optionally, the processor is further configured to: stop using a radio frequency (RF) link for downlink transmission.

[0121] To achieve the above object, an embodiment of the present invention provides a communication device, which is a receiving end and includes a processor and a transceiver, wherein:

[0122] The processor is used to perform zoom determination;

[0123] The transceiver is used to send first zoom indication information for instructing the receiving end to perform zoom to the sending end according to the result of the zoom determination.

[0124] Optionally, when the processor performs zoom determination, it is specifically used to:

[0125] detecting an imaging state of an imaging detector array;

[0126] When the imaging state changes from the first imaging state to the second imaging state, determining to trigger zooming;

[0127] Wherein, in the first imaging state, all pixels of the receiving end receive the image of the transmitting end;

[0128] In the second imaging state, some pixels of the receiving end receive the image of the transmitting end.

[0129] Optionally, the processor is further configured to perform a zoom operation;

[0130] The transceiver is used to send second zoom indication information to the sending end after the zoom is completed, and the second zoom indication information indicates whether the zoom is completed.

[0131] Optionally, the transceiver is further used to: send the second zoom indication information to the transmitting end via a radio frequency RF link and / or an optical link.

[0132] Optionally, when the transceiver sends the first zoom indication information according to the result of the zoom determination, it is specifically used to:

[0133] In the case where the result of the zoom determination indicates that zoom is triggered, the first zoom indication information is sent to the transmitting end via an RF link and / or an optical link.

[0134] Optionally, the transceiver is further used to: send information of a target pixel point to a transmitting end, where the target pixel point is a pixel point that can be imaged currently.

[0135] To achieve the above-mentioned purpose, an embodiment of the present invention provides a communication device, including: a transceiver, a processor, a memory, and a program or instruction stored in the memory and executable on the processor; when the processor executes the program or instruction, the steps in the above-mentioned transmission method based on optical communication are implemented.

[0136] To achieve the above objective, an embodiment of the present invention provides a readable storage medium having a program or instruction stored thereon, wherein the program or instruction, when executed by a processor, implements the steps in the above-mentioned transmission method based on optical communication.

[0137] The beneficial effects of the above technical solution of the present invention are as follows:

[0138] In this embodiment, the transmitting end adjusts the downlink transmission mode during the zooming process performed by the receiving end, and activates the corresponding communication mechanism by sensing the change of focal length, thereby ensuring that the ongoing communication will not be interrupted. BRIEF DESCRIPTION OF THE DRAWINGS

[0139] Figure 1 Schematic diagram of the imaging principle of the LED array in the imaging MIMO according to an embodiment of the present invention;

[0140] Figure 2 One of the flow diagrams of the optical communication-based transmission method applied to the transmitting end according to an embodiment of the present invention;

[0141] Figure 3a-3g This is a schematic diagram of imaging of an imaging MIMO detector array according to an embodiment of the present invention;

[0142] Figure 4 The second flowchart of the optical communication-based transmission method applied to the transmitting end according to an embodiment of the present invention;

[0143] Figure 5 A schematic diagram of a flow chart of a transmission method based on optical communication applied to a receiving end according to an embodiment of the present invention;

[0144] Figure 6 This is one of the structural schematic diagrams of a transmission device based on optical communication according to an embodiment of the present invention;

[0145] Figure 7 This is a second structural schematic diagram of a transmission device based on optical communication according to an embodiment of the present invention;

[0146] Figure 8 This is one of the structural schematic diagrams of the communication device according to an embodiment of the present invention;

[0147] Fig. 9 This is a second structural diagram of a communication device according to an embodiment of the present invention;

[0148] Fig.10 It is a schematic structural diagram of a communication device according to another embodiment of the present invention. DETAILED DESCRIPTION

[0149] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0150] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present invention. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0151] In various embodiments of the present invention, it should be understood that the size of the serial numbers of the following processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0152] Additionally, the terms "system" and "network" are often used interchangeably herein.

[0153] In the embodiments provided in the present application, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, and B can also be determined according to A and / or other information.

[0154] When describing the embodiments of the present invention, some concepts used in the following description are first explained.

[0155] Visible light communication (VLC) is a new type of wireless optical communication technology that uses light-emitting diodes (LEDs) for communication. LEDs have high sensitivity and can transmit information by flashing signals at a speed that is indistinguishable to the human eye. In order to take into account the lighting function, white light LEDs are often used as transmitters in VLC. The data before transmission can be modulated and encoded, and then the optical signal carrying the information reaches the receiving end through the channel. The photodetector (PD) at the receiving end will receive the corresponding optical signal and feedback in the form of current. The electrical signal is amplified and processed, and finally restored to the required data stream. In addition to PDs, imaging sensors can also be used to receive optical signals. Imaging sensors are composed of a large number of PDs arranged in a matrix on an integrated circuit. Since the light generated by a large number of LED light sources is incoherent light, it does not include phase information compared to electromagnetic waves. Therefore, intensity modulation / direct detection (IM / DD) is often used in VLC.

[0156] Considering the lighting effect and modulation bandwidth, LED array integration is usually adopted, with multiple LED lamp beads forming an LED array, and multiple LED arrays are deployed in locations such as indoor ceilings to maintain lighting and communication. The MIMO transmission method of LED multi-array can improve the transmission rate of visible light communication systems, reduce the occlusion problems caused by mobility and indoor blind spots, improve communication quality, and reduce the difficulty of physical alignment. Depending on whether there is an imaging lens at the receiving end, VLC-MIMO can be divided into non-imaging MIMO and imaging MIMO.

[0157] In VLC-MIMO transmission, each LED array transmits an independent data stream, and the LEDs in the LED array transmit the same data stream. At the transmitter, first, a serial-to-parallel conversion is required to load different data streams onto different LED arrays, which are then modulated and encoded before being transmitted from the LED arrays to the receiver PD via the channel. The original data is then restored after operations such as forward amplifier, equalizer, decoding and demodulation, and parallel-to-serial conversion.

[0158] Non-imaging MIMO differs from imaging MIMO mainly at the receiving end. Non-imaging MIMO has multiple PDs at the receiving end, and different LED arrays to different PDs correspond to a channel in MIMO. Since the VLC channel is not a complex-valued channel, the channel matrix will be rank-deficient at the center and axis of the room, and the PDs will receive the same optical power and delay at these locations.

[0159] For imaging MIMO, imaging MIMO uses an imaging convex lens to project the image of the LED array onto the receiving imaging sensor detector array. Compared with non-imaging MIMO, imaging MIMO uses an imaging lens to replace the concentrator used by each PD in non-imaging MIMO, reducing the size of the receiver. The imaging sensor detector array is composed of multiple detector pixels (also called pixels), and the projected image will hit multiple pixels on the array to stimulate current. Figure 1 As shown in the figure. L in the figure is called the focal length, which can be obtained by calculating the lens diameter and the lens aperture value. According to the indoor model and the focal length L, the minimum value of the physical size of the imaging detector array can be calculated. The specific physical position of the receiver and the focal length L will affect the imaging result.

[0160] like Figure 2 As shown, a transmission method based on optical communication according to an embodiment of the present invention is applied to a transmitting end, comprising:

[0161] Step 201: Receive first zoom instruction information from a receiving end for instructing the receiving end to perform zooming.

[0162] The first zoom indication information is sent by the receiving end when it is determined that the zoom is triggered. The receiving end can detect the imaging detector array, analyze the imaging conditions on the imaging detector array, and determine whether to trigger the zoom. If it is determined that the zoom is triggered, the indication information of the zoom of the receiving end can be reported to the sending end, that is, the first zoom indication information, which is used to instruct the receiving end to start zooming.

[0163] Optionally, when the receiving end determines whether to trigger zoom, the zoom determination mechanism applied includes an imaging result determination method: when the detected imaging result changes from the first category to the second category, the zoom is triggered. The first category of imaging results is: all pixels of the imaging detector array receive the image of the LED of the transmitting end; the second category of imaging results is: some pixels of the imaging detector array receive the image of the LED of the transmitting end.

[0164] Step 202: adjust the downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information; wherein the downlink transmission mode includes: radio frequency RF link transmission; optical link transmission; and RF link transmission and optical link transmission.

[0165] After receiving the first zoom indication information, the transmitting end learns that the receiving end is zooming. In order to avoid communication interruption during the focusing process, the transmitting end adjusts the downlink transmission mode from the transmitting end to the receiving end. The downlink transmission mode can be: RF link transmission, that is, the transmitting end performs downlink transmission through the RF link; optical link transmission, the transmitting end performs downlink transmission through an updated optical link transmission mode; RF link transmission and optical link transmission, that is, the transmitting end uses a combination of RF link and optical link for downlink transmission.

[0166] In this embodiment, the transmitting end adjusts the downlink transmission mode during the zooming process performed by the receiving end, and activates the corresponding communication mechanism by sensing the change of focal length, thereby ensuring that the ongoing communication will not be interrupted.

[0167] Specifically, step 201 may include: receiving first zoom indication information sent by the receiving end via a radio frequency RF link and / or an optical link. When the receiving end starts zooming, the first zoom indication information may be reported via an RF link; or, the receiving end may report the first zoom indication information via an optical link; or, the receiving end may report the first zoom indication information via a combination of an RF link and an optical link.

[0168] It should be noted that the transmitting end and the receiving end in the present application both have an RF communication module and an optical communication module (such as a VLC communication module). When the RF link and the optical link are used in combination for downlink transmission, the transmitting end and the receiving end have two communication channels, namely, the RF communication channel and the optical link communication channel. When the transmitting end adjusts the downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information, it includes but is not limited to the following methods:

[0169] Method 1: Adjust the downlink transmission mode from optical link transmission to RF link transmission.

[0170] In this embodiment, after receiving the first zoom indication information of the receiving end for zooming, the transmitting end uses the RF link for downlink transmission. If there is only one communication channel between the current transmitting end and the receiving end, and the current transmitting end uses the optical link for downlink transmission, it is necessary to perform a switching step, switch to the RF network, and use the RF network to complete the downlink transmission. If there are two communication channels between the current transmitting end and the receiving end, the RF communication channel can be directly used to perform downlink transmission.

[0171] During the zooming process at the receiving end, the transmitting end adjusts the downlink transmission mode to RF link transmission, thereby avoiding communication interruption caused by the optical link transmission being affected due to the misalignment between the transmitting end and the receiving end during the focusing process of the receiving end. Adjusting to use RF link transmission ensures continuous high-speed communication and ensures that ongoing communications will not be interrupted.

[0172] Mode 2: adjusting the downlink transmission mode from optical link transmission using the first precoding array to optical link transmission using the second precoding array.

[0173] In this embodiment, the first precoding matrix is ​​the coding matrix of the optical link transmission used before the transmitting end adjusts the downlink transmission mode. After the transmitting end receives the first zoom indication information of the receiving end for zooming, in order to avoid the influence of the focusing process of the receiving end on the optical link transmission, the downlink transmission mode is adjusted to the optical link transmission using the updated second precoding matrix. Among them, the second precoding matrix is ​​a new precoding matrix generated by the transmitting end after the new channel matrix measurement is completed according to the imageable pixel points. The generation method of the second precoding matrix includes:

[0174] 1): The second precoding matrix is ​​generated by measuring the channel matrix based on the target pixel point; wherein the target pixel point is a pixel point that can be imaged currently.

[0175] The target pixel point can be at least one, that is, there can be multiple currently available pixel points. The transmitting end completes the measurement of the new channel matrix based on the available pixel points fed back by the receiving end, generates the second precoding array, and uses the new second precoding array for downlink transmission.

[0176] 2): The second precoding matrix is ​​generated by measuring the channel matrix of a first pixel point among target pixel points; wherein the target pixel point is a pixel point that can be imaged currently.

[0177] The target pixel point may be at least one, and the transmitting end selects one of the available pixel points, such as the first pixel point, according to the available pixel points fed back by the receiving end, completes the measurement of the new channel matrix, generates the second precoding matrix, and uses the new second precoding matrix for downlink transmission. The available pixel point is the pixel point that can be imaged currently.

[0178] Before adjusting the downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information, the method further includes: receiving information of target pixel points sent by the receiving end, wherein the target pixel points are pixels that can be imaged currently. That is, the receiving end can also send information of target pixel points to the transmitting end to indicate which pixels can be imaged currently.

[0179] In this embodiment, the transmitting end uses the available pixel points to complete the measurement of the new channel matrix based on the information of the available pixel points fed back by the receiving end, and uses the new precoding array for downlink transmission, which can ensure that the image of the transmitting end falls completely on the imaging detector of the receiving end, thereby ensuring that the downlink transmission is not interrupted.

[0180] The following describes a specific implementation process of adjusting the downlink transmission mode from optical link transmission using the first precoding array to optical link transmission using the second precoding array in the present application through a specific embodiment.

[0181] Take the example of 4×4 MIMO, where the transmitting end has 4 LED arrays and the receiving end has 4 pixels. After a reasonable minimum physical size design, it can be ensured that at least a part of the image formed by the LED array of the transmitting end always falls on the imaging detector array. All common imaging situations such as Figure 3a to Figure 3g shown.

[0182] in, Figure 3a to Figure 3f The imaging is considered to be strictly aligned with the transmitter and receiver. Figure 3g The receiving end and the transmitting end in the horizontal plane have a certain rotation, which can also include vertical rotation. The physical position of the receiving end and the focal length L will affect the imaging results. Among them, all imaging results can be divided into two categories: in the first category, all pixels receive the image of the LED, such as Figure 3e-3g ; The second category is that some pixels receive the image of the LED, such as Figure 3a-3d The first type of imaging results corresponds to the full rank case of the 4×4 MIMO channel matrix. The four LEDs can be detected by each pixel and can therefore be successfully recovered. The second type of imaging results corresponds to the non-full rank case. The receiver cannot distinguish the four LED arrays. Figure 3e-3g The highest communication rate can be achieved, and the communication rate in other cases cannot reach the maximum.

[0183] As the user mobility and the physical location of the terminal change, the first type of imaging result at the original optimal focal length may become the second type, resulting in performance degradation. At the same time, the information of the channel matrix also changes. At this time, the receiving end needs to adjust the focal length to restore the imaging result to the first type. During the zoom process, the sending end adjusts the focal length according to the current imageable pixel points (such as Figure 3a to Figure 3cPixel 4 in Figure 3d Pixel points 1 and 4 in the image), perform channel matrix measurement to generate the second precoding array, and use the optical link of the second precoding array for downlink transmission, thereby ensuring that the image of the LED at the transmitting end can be received by the available pixel points, ensuring that the communication will not be interrupted during the focusing process at the receiving end.

[0184] Mode 3: adjusting the downlink transmission mode from optical link transmission to RF link transmission and optical link transmission.

[0185] After receiving the first zoom indication information of the receiving end for zooming, the transmitting end uses the RF link and the optical link to perform downlink transmission. There are currently two communication channels between the transmitting end and the receiving end: the RF communication channel and the optical link communication channel. The transmitting end uses the RF communication channel and the optical link communication channel for downlink transmission at the same time, which effectively avoids the communication interruption caused by the optical link transmission being affected due to the misalignment between the transmitting end and the receiving end during the focusing process of the receiving end.

[0186] Optionally, after adjusting the downlink transmission mode from the sending end to the receiving end according to the first zoom indication information, the method further includes: receiving second zoom indication information from the receiving end, the second zoom indication information indicating whether the zoom is completed.

[0187] After the receiving end completes the zoom, the receiving end sends the second zoom indication information indicating the completion of the zoom to the sending end, and reports that the zoom is completed. The method for the receiving end to determine whether the zoom is completed includes but is not limited to: determination based on the lens zoom process; determination based on the imaging result, such as: all pixels of the receiving end receive the image of the LED of the sending end.

[0188] The receiving of the second zoom indication information from the receiving end includes: receiving the second zoom indication information sent by the receiving end via a radio frequency (RF) link and / or an optical link. The receiving end may report the second zoom indication information via an RF link; or, the receiving end may report the second zoom indication information via an optical link; or, the receiving end may report the second zoom indication information via a combination of an RF link and an optical link.

[0189] Optionally, after receiving first zoom indication information from the receiving end for instructing the receiving end to perform zooming, the method also includes: adjusting the first period of multi-input multi-output MIMO channel measurement feedback to a second period, and the second period is smaller than the first period; that is, after the transmitting end receives the first zoom indication information that the receiving end is zooming, it is known that the receiving end is zooming, and the period of MIMO channel measurement feedback is shortened to speed up the measurement.

[0190] After receiving the second zoom indication information from the receiving end, the method further includes: according to the second zoom indication information, when the zoom is completed, adjusting the second period of the MIMO channel measurement feedback to the first period. When the zoom of the receiving end is completed, the transmitting end learns that the zoom of the receiving end is completed according to the second zoom indication information, and restores the period of the MIMO channel measurement feedback.

[0191] Optionally, after receiving the second zoom indication information from the receiving end, the method further includes: performing channel matrix measurement to generate a third precoding array based on the second zoom indication information when the zoom is completed; and using the optical link of the third precoding array for downlink transmission.

[0192] After the transmitting end learns that the receiving end has completed zooming according to the second zoom indication information, the measurement of the new channel matrix is ​​completed, and the optical link of the new precoding array (i.e., the third precoding array) is used for downlink transmission. At this time, the receiving end has completed zooming, and all pixels of the receiving end have received the image of the LED of the transmitting end, satisfying the full rank of the channel matrix. Using the optical link of the third precoding array for downlink transmission can achieve the highest rate of communication.

[0193] After using the optical link of the third precoding array for downlink transmission, the method further includes: stopping using the radio frequency (RF) link for downlink transmission.

[0194] In this embodiment, if the transmitting end adjusts the downlink transmission mode from the transmitting end to the receiving end to RF link transmission according to the first zoom indication information, then after the zoom is completed, the transmitting end stops using the RF link for downlink transmission. Specifically, the transmitting end can stop RF link transmission within a shorter preset time, and can also keep RF link transmission for a certain time and stop when stable transmission is met.

[0195] The following is a specific example of the implementation process of the optical communication transmission method of the present application. Figure 4 As shown:

[0196] Step 1: The receiving end performs zoom determination and reports first zoom indication information to the sending end;

[0197] Step 2: The receiving end performs zooming; the sending end learns that the receiving end is performing zooming according to the first zoom indication information, and adjusts the downlink transmission mode;

[0198] Step 3: Use the new downlink transmission method to perform downlink transmission and complete the corresponding information transmission;

[0199] Step 4: After the zoom is completed, the receiving end reports the second zoom indication information to the sending end;

[0200] Step 5: The transmitter uses the optical link for downlink transmission;

[0201] Step 6: Stop RF link transmission.

[0202] In the embodiments of the present application, the transmitting end adjusts the downlink transmission mode during the zooming process at the receiving end, and activates the corresponding communication mechanism by sensing the change in focal length, thereby avoiding communication interruption caused by the optical link transmission being affected due to the misalignment between the transmitting end and the receiving end during the focusing process of the receiving end, thereby ensuring continuous high-speed communication.

[0203] like Figure 5 As shown, a transmission method based on optical communication according to an embodiment of the present invention is applied to a receiving end, comprising:

[0204] Step 501, performing zoom determination;

[0205] The receiving end performs zoom determination. Specifically, the receiving end can detect the imaging detector, and report and zoom if zoom is triggered. Specifically, the imaging state of the imaging detector array is detected; when the imaging state changes from a first imaging state to a second imaging state, it is determined that the zoom is triggered; wherein, in the first imaging state, all pixels of the receiving end receive the image of the transmitting end; in the second imaging state, some pixels of the receiving end receive the image of the transmitting end.

[0206] In this embodiment, when the receiving end performs zoom determination, the imaging situation on the imaging detector can be analyzed, and the zoom determination mechanism adopted includes an imaging result determination method: when the detected imaging result changes from the first category to the second category, the zoom is triggered, that is, when the imaging state changes from the first imaging state to the second imaging state, the zoom is triggered. Wherein, in the first imaging state, all the pixels of the receiving end receive the image of the transmitting end, that is, the first type of imaging result is: all the pixels of the imaging detector array receive the image of the LED of the transmitting end; in the second imaging state, some pixels of the receiving end receive the image of the transmitting end, that is, the second type of imaging result is: some pixels of the imaging detector array receive the image of the LED of the transmitting end.

[0207] Step 502: According to the result of the zoom determination, first zoom indication information for instructing the receiving end to perform zoom is sent to the sending end.

[0208] After the receiving end makes a zoom determination and determines that zoom is triggered, the receiving end reports first zoom indication information to the transmitting end, which is used to instruct the receiving end to start zooming, so that the transmitting end adjusts the downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information. The downlink transmission mode includes: radio frequency RF link transmission; optical link transmission; and RF link transmission and optical link transmission.

[0209] After determining that the zoom is triggered, the receiving end reports the first zoom indication information to the sending end, so that the sending end adjusts the downlink transmission mode during the zoom execution of the receiving end, and starts the corresponding communication mechanism by sensing the change of focal length, thereby ensuring that the ongoing communication will not be interrupted.

[0210] Wherein, when the result of the zoom determination indicates that the zoom is triggered, the receiving end sends the first zoom indication information to the transmitting end via the RF link and / or the optical link. That is, the receiving end may report the first zoom indication information via the RF link; or the receiving end may report the first zoom indication information via the optical link; or the receiving end may report the first zoom indication information via the combination of the RF link and the optical link.

[0211] Optionally, after determining that the zoom is triggered, the method further includes: performing a zoom operation; after the zoom is completed, sending second zoom indication information to the sending end, the second zoom indication information indicating whether the zoom is completed.

[0212] The receiving end performs a zoom operation when zoom is triggered, and sends a second zoom indication information to the sending end after zoom is completed, to indicate that zoom is completed. The receiving end may send the second zoom indication information to the sending end via a radio frequency (RF) link and / or an optical link.

[0213] Specifically, the receiving end's determination method for whether zooming is completed includes but is not limited to: determination based on the lens zooming process; determination based on imaging results, such as: all pixels at the receiving end receive the image of the LED at the sending end.

[0214] Optionally, after performing zoom determination, the method further includes: sending information of a target pixel point to a transmitting end, wherein the target pixel point is a pixel point that can be imaged currently.

[0215] In this embodiment, the receiving end can also send information about the target pixel points to the transmitting end to indicate which pixel points can be imaged currently, so that the transmitting end can complete the measurement of the new channel matrix based on the information about the target pixel points using the available pixel points, and use the new precoding array for downlink transmission, thereby ensuring that the image of the transmitting end falls completely on the imaging detector of the receiving end, thereby ensuring that the downlink transmission is not interrupted.

[0216] The transmitting end may perform channel matrix measurement according to the target pixel point to generate a second precoding matrix, and may also select one of the pixel points, such as the first pixel point, according to the information of the target pixel point, complete the measurement of the new channel matrix, generate the second precoding matrix, and use the new second precoding matrix for downlink transmission. The available pixel point is the pixel point that can be imaged currently.

[0217] In an embodiment of the present application, the receiving end analyzes the imaging situation on the imaging detector, and reports the first zoom indication information to the sending end after determining that the zoom is triggered, so that the sending end adjusts the downlink transmission mode during the process of zooming at the receiving end, and activates the corresponding communication mechanism by sensing the change in focal length, thereby ensuring that the ongoing communication will not be interrupted.

[0218] like Figure 6 As shown, another embodiment of the present invention provides a transmission device 600 based on optical communication, comprising:

[0219] A first receiving module 610 is used to receive first zoom indication information from a receiving end for instructing the receiving end to perform zooming;

[0220] The processing module 620 is used to adjust the downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information;

[0221] The downlink transmission modes include: radio frequency (RF) link transmission; optical link transmission; and RF link transmission and optical link transmission.

[0222] Optionally, the first receiving module is specifically used to: receive first zoom indication information sent by the receiving end via a radio frequency RF link and / or an optical link.

[0223] Optionally, the processing module includes:

[0224] The first processing unit is used to adjust the downlink transmission mode from optical link transmission to RF link transmission.

[0225] Optionally, the processing module includes:

[0226] The second processing unit is used to adjust the downlink transmission mode from optical link transmission using the first precoding array to optical link transmission using the second precoding array.

[0227] Optionally, the second precoding matrix is ​​generated by performing channel matrix measurement on a target pixel point;

[0228] The target pixel point is a pixel point that can be imaged currently.

[0229] Optionally, the second precoding matrix is ​​generated by performing channel matrix measurement on a first pixel point among the target pixel points;

[0230] The target pixel point is a pixel point that can be imaged currently.

[0231] Optionally, the transmission device further includes:

[0232] The second receiving module is used to receive the information of the target pixel point sent by the receiving end, and the target pixel point is the pixel point that can be imaged currently.

[0233] Optionally, the processing module includes:

[0234] The third processing unit is used to adjust the downlink transmission mode from optical link transmission to RF link transmission and optical link transmission.

[0235] Optionally, the transmission device further includes:

[0236] The third receiving module is used to receive second zoom indication information from the receiving end, where the second zoom indication information indicates whether the zoom is completed.

[0237] Optionally, the third receiving module is specifically used to: receive second zoom indication information sent by the receiving end via a radio frequency RF link and / or an optical link.

[0238] Optionally, the transmission device further includes:

[0239] A second processing module, configured to adjust a first period of multiple-input multiple-output MIMO channel measurement feedback to a second period, wherein the second period is smaller than the first period;

[0240] The third processing module is used to adjust the second period of the MIMO channel measurement feedback to the first period when the zoom is completed according to the second zoom indication information.

[0241] Optionally, the transmission device further includes:

[0242] A measurement module, configured to perform channel matrix measurement and generate a third precoding matrix according to the second zoom indication information when zooming is completed;

[0243] A transmission module is used for performing downlink transmission using the optical link of the third precoding array.

[0244] Optionally, the transmission device further includes:

[0245] The fourth processing module is used to stop using the radio frequency RF link for downlink transmission.

[0246] In the transmission device of the embodiment of the present application, the transmitting end adjusts the downlink transmission mode during the zooming process performed at the receiving end, and activates the corresponding communication mechanism by sensing the change of focal length, thereby ensuring that the ongoing communication will not be interrupted.

[0247] The optical communication transmission device provided in the embodiment of the present application can achieve the above Figure 1-Figure 4To avoid repetition, the various processes implemented by the transmission device based on optical communication in the method embodiment will not be described again here.

[0248] like Figure 7 As shown, an embodiment of the present invention provides a transmission device 700 based on optical communication, comprising:

[0249] A determination module 710, configured to perform zoom determination;

[0250] The first sending module 720 is used to send first zoom indication information for instructing the receiving end to perform zooming to the sending end according to the result of the zoom determination.

[0251] Optionally, the determination module includes:

[0252] A detection unit, used to detect the imaging state of the imaging detector array;

[0253] A determination module, configured to determine that zoom is triggered when the imaging state changes from the first imaging state to the second imaging state;

[0254] Wherein, in the first imaging state, all pixels of the receiving end receive the image of the transmitting end;

[0255] In the second imaging state, some pixels of the receiving end receive the image of the transmitting end.

[0256] Optionally, the transmission device further includes:

[0257] A zoom module, used for performing a zoom operation;

[0258] The second sending module is used to send second zoom indication information to the sending end after the zoom is completed, where the second zoom indication information indicates whether the zoom is completed.

[0259] Optionally, the second sending module is specifically used to: send the second zoom indication information to the sending end via a radio frequency RF link and / or an optical link.

[0260] Optionally, the first sending module is specifically used to: when the result of the zoom determination indicates that zoom is triggered, send the first zoom indication information to the sending end via an RF link and / or an optical link.

[0261] Optionally, the transmission device further includes:

[0262] The third sending module is used to send information of a target pixel point to a sending end, where the target pixel point is a pixel point that can be imaged currently.

[0263] In the transmission device of the embodiment of the present application, the receiving end analyzes the imaging situation on the imaging detector, and reports the first zoom indication information to the sending end after determining that the zoom is triggered, so that the sending end adjusts the downlink transmission mode during the process of zooming at the receiving end, and activates the corresponding communication mechanism by sensing the change of focal length, which can ensure that the ongoing communication will not be interrupted.

[0264] The optical communication transmission device provided in the embodiment of the present application can achieve the above Figure 5 In order to avoid repetition, the various processes implemented by the transmission device based on optical communication in the method embodiment are not described here.

[0265] like Figure 8 As shown, an embodiment of the present invention provides a communication device 800, which is a transmitting end and includes a processor 810 and a transceiver 820, wherein:

[0266] The transceiver 820 is used to receive first zoom indication information from the receiving end for instructing the receiving end to perform zooming;

[0267] The processor 810 is configured to adjust a downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information;

[0268] The downlink transmission modes include: radio frequency (RF) link transmission; optical link transmission; and RF link transmission and optical link transmission.

[0269] Optionally, when the transceiver 820 receives the first zoom indication information from the receiving end for instructing the receiving end to perform zooming, it is specifically used to receive the first zoom indication information sent by the receiving end via a radio frequency RF link and / or an optical link.

[0270] Optionally, when the processor 810 adjusts the downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information, it is specifically configured to:

[0271] The downlink transmission mode is adjusted from optical link transmission to RF link transmission.

[0272] Optionally, when the processor 810 adjusts the downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information, it is specifically configured to:

[0273] The downlink transmission mode is adjusted from optical link transmission using the first precoding array to optical link transmission using the second precoding array.

[0274] Optionally, the second precoding matrix is ​​generated by performing channel matrix measurement on a target pixel point;

[0275] The target pixel point is a pixel point that can be imaged currently.

[0276] Optionally, the second precoding matrix is ​​generated by performing channel matrix measurement on a first pixel point among the target pixel points;

[0277] The target pixel point is a pixel point that can be imaged currently.

[0278] Optionally, the transceiver 820 is further used to: receive information of a target pixel sent by the receiving end, where the target pixel is a pixel that can be imaged currently.

[0279] Optionally, when the processor 810 adjusts the downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information, it is specifically configured to:

[0280] The downlink transmission mode is adjusted from optical link transmission to RF link transmission and optical link transmission.

[0281] Optionally, the transceiver 820 is further configured to: receive second zoom indication information from a receiving end, where the second zoom indication information indicates whether the zoom is completed.

[0282] Optionally, when receiving the second zoom indication information from the receiving end, the transceiver 820 is specifically used to: receive the second zoom indication information sent by the receiving end through a radio frequency RF link and / or an optical link.

[0283] Optionally, the processor 810 is further configured to:

[0284] Adjusting a first period of multiple-input multiple-output MIMO channel measurement feedback to a second period, where the second period is smaller than the first period;

[0285] According to the second zoom indication information, when the zoom is completed, the second period of the MIMO channel measurement feedback is adjusted to the first period.

[0286] Optionally, the processor 810 is further configured to:

[0287] According to the second zoom indication information, when zooming is completed, performing channel matrix measurement to generate a third precoding matrix;

[0288] The optical link of the third precoding array is used for downlink transmission.

[0289] Optionally, the processor 810 is further configured to: stop using a radio frequency RF link for downlink transmission.

[0290] The communication device of this embodiment adjusts the downlink transmission mode during the zooming process at the receiving end, and activates the corresponding communication mechanism by sensing the change of focal length, thereby ensuring that the ongoing communication will not be interrupted.

[0291] like Fig. 9 As shown, an embodiment of the present invention provides a communication device 900, which is a receiving end and includes a processor 910 and a transceiver 920, wherein:

[0292] The processor 910 is used to perform zoom determination;

[0293] The transceiver 920 is used for sending first zoom indication information for instructing the receiving end to perform zooming to the sending end according to the result of the zoom determination.

[0294] Optionally, when the processor 910 performs zoom determination, it is specifically configured to:

[0295] detecting an imaging state of an imaging detector array;

[0296] When the imaging state changes from the first imaging state to the second imaging state, determining to trigger zooming;

[0297] Wherein, in the first imaging state, all pixels of the receiving end receive the image of the transmitting end;

[0298] In the second imaging state, some pixels of the receiving end receive the image of the transmitting end.

[0299] Optionally, the processor 910 is further configured to perform a zoom operation;

[0300] The transceiver is used to send second zoom indication information to the sending end after the zoom is completed, and the second zoom indication information indicates whether the zoom is completed.

[0301] Optionally, the transceiver 920 is further used to: send the second zoom indication information to the transmitting end via a radio frequency RF link and / or an optical link.

[0302] Optionally, when the transceiver 920 sends the first zoom indication information according to the result of the zoom determination, it is specifically configured to:

[0303] In the case where the result of the zoom determination indicates that zoom is triggered, the first zoom indication information is sent to the transmitting end via an RF link and / or an optical link.

[0304] Optionally, the transceiver 920 is further used to: send information of a target pixel point to a transmitting end, where the target pixel point is a pixel point that can be imaged currently.

[0305] The communication device of this embodiment analyzes the imaging situation on the imaging detector, and reports the first zoom indication information to the sending end after determining that the zoom is triggered, so that the sending end adjusts the downlink transmission mode during the process of zooming at the receiving end, and activates the corresponding communication mechanism by sensing the change in focal length, which can ensure that the ongoing communication will not be interrupted.

[0306] A communication device according to another embodiment of the present invention, Fig.10 As shown, the communication device can be a transmitting end or a receiving end, including a transceiver 1010, a processor 1000, a memory 1020, and a program or instruction stored in the memory 1020 and executable on the processor 1000; when the processor 1000 executes the program or instruction, the above-mentioned transmission method based on optical communication is implemented.

[0307] The transceiver 1010 is used to receive and send data under the control of the processor 1000 .

[0308] Among them, Fig.10 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 1000 and memory represented by memory 1020. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 1010 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium. The processor 1000 is responsible for managing the bus architecture and general processing, and the memory 1020 may store data used by the processor 1000 when performing operations.

[0309] A readable storage medium according to an embodiment of the present invention stores a program or instruction thereon. When the program or instruction is executed by a processor, the steps in the transmission method based on optical communication as described above are implemented and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0310] The processor is the processor in the transmission method based on optical communication described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, etc.

[0311] It should be further explained that the terminals described in this specification include but are not limited to smart phones, tablet computers, etc., and many of the functional components described are called modules in order to more particularly emphasize the independence of their implementation methods.

[0312] In the embodiment of the present invention, module can be implemented with software so that it can be executed by various types of processors. For example, an executable code module of an identification can include one or more physical or logical blocks of computer instructions, for example, it can be constructed as an object, process or function. Nevertheless, the executable code of the identified module does not need to be physically located together, but can include different instructions stored in different positions, and when these instructions are logically combined together, it constitutes a module and realizes the specified purpose of the module.

[0313] In fact, executable code module can be a single instruction or many instructions, and can even be distributed on a plurality of different code segments, distributed among different programs, and distributed across a plurality of memory devices. Similarly, operating data can be identified in the module, and can be implemented and organized in the data structure of any appropriate type according to any appropriate form. The operating data can be collected as a single data set, or can be distributed in different locations (including on different storage devices), and can only be present on a system or network as an electronic signal at least in part.

[0314] When a module can be implemented by software, considering the level of existing hardware technology, a person skilled in the art can build a corresponding hardware circuit to implement the corresponding function of the module that can be implemented by software without considering the cost. The hardware circuit includes a conventional very large scale integration (VLSI) circuit or gate array and existing semiconductors such as logic chips, transistors, or other discrete components. The module can also be implemented by a programmable hardware device, such as a field programmable gate array, a programmable array logic, a programmable logic device, etc.

[0315] The above exemplary embodiments are described with reference to the accompanying drawings, and many different forms and embodiments are feasible without departing from the spirit and teachings of the present invention. Therefore, the present invention should not be constructed as a limitation of the exemplary embodiments proposed herein. More specifically, these exemplary embodiments are provided so that the present invention will be perfect and complete, and the scope of the present invention will be conveyed to those who are familiar with the technology. In these figures, the component sizes and relative sizes may be exaggerated for clarity. The terms used here are only based on the purpose of describing specific exemplary embodiments and are not intended to be limiting. As used herein, unless the text clearly indicates otherwise, the singular forms "one", "an" and "the" are intended to include these multiple forms. It will be further understood that the terms "including" and / or "comprising" when used in this specification indicate the presence of the features, integers, steps, operations, components and / or components, but do not exclude the presence or increase of one or more other features, integers, steps, operations, components, components and / or their groups. Unless otherwise indicated, when stated, a range of values ​​includes the upper and lower limits of that range and any subranges therebetween.

[0316] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A transmission method based on optical communication, applied to a transmitting end, characterized in that: include: Receiving first zoom indication information from a receiving end for instructing the receiving end to perform zooming; adjusting, according to the first zoom indication information, a downlink transmission mode from the transmitting end to the receiving end; The downlink transmission mode includes: radio frequency (RF) link transmission; optical link transmission; and RF link transmission and optical link transmission; The adjusting, according to the first zoom indication information, a downlink transmission mode from the transmitting end to the receiving end includes: Adjusting the downlink transmission mode from optical link transmission to RF link transmission; or, Adjusting the downlink transmission mode from optical link transmission using the first precoding array to optical link transmission using the second precoding array; or, The downlink transmission mode is adjusted from optical link transmission to RF link transmission and optical link transmission.

2. The transmission method based on optical communication according to claim 1, characterized in that: The receiving first zoom indication information from the receiving end for instructing the receiving end to perform zooming includes: Receive first zoom indication information sent by the receiving end through a radio frequency RF link and / or an optical link.

3. The transmission method based on optical communication according to claim 1, characterized in that: The second precoding matrix is ​​generated by measuring the channel matrix according to the target pixel point; The target pixel point is a pixel point that can be imaged currently.

4. The transmission method based on optical communication according to claim 1, characterized in that: The second precoding matrix is ​​generated by measuring a channel matrix based on a first pixel point among the target pixel points; The target pixel point is a pixel point that can be imaged currently.

5. The transmission method based on optical communication according to claim 3 or 4, characterized in that: Before adjusting the downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information, the method further includes: Receive information of a target pixel sent by the receiving end, where the target pixel is a pixel that can be imaged currently.

6. The transmission method based on optical communication according to claim 1, characterized in that: After adjusting the downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information, the method further includes: Second zoom indication information is received from a receiving end, where the second zoom indication information indicates whether the zoom is completed.

7. The transmission method based on optical communication according to claim 6, characterized in that: The receiving of second zoom indication information from the receiving end includes: Receive second zoom indication information sent by the receiving end through a radio frequency RF link and / or an optical link.

8. The transmission method based on optical communication according to claim 6, characterized in that: After receiving first zoom indication information from the receiving end for instructing the receiving end to perform zooming, the method further includes: Adjusting a first period of multiple-input multiple-output MIMO channel measurement feedback to a second period, where the second period is smaller than the first period; After receiving the second zoom indication information from the receiving end, the method further includes: According to the second zoom indication information, when the zoom is completed, the second period of the MIMO channel measurement feedback is adjusted to the first period.

9. The transmission method based on optical communication according to claim 6, characterized in that: After receiving the second zoom indication information from the receiving end, the method further includes: According to the second zoom indication information, when zooming is completed, performing channel matrix measurement to generate a third precoding matrix; The optical link of the third precoding array is used for downlink transmission.

10. The transmission method based on optical communication according to claim 9, characterized in that: After downlink transmission is performed using the optical link of the third precoding array, the method further includes: Stop using the RF link for downlink transmission.

11. A transmission method based on optical communication, applied to a receiving end, characterized in that: include: Perform zoom determination; According to the result of the zoom determination, first zoom indication information for instructing the receiving end to perform zoom is sent to the sending end, so that the sending end adjusts the downlink transmission mode during the process of the receiving end performing zoom; The adjusting the downlink transmission mode includes: Adjusting the downlink transmission mode from optical link transmission to RF link transmission; or, Adjusting the downlink transmission mode from optical link transmission using the first precoding array to optical link transmission using the second precoding array; or, The downlink transmission mode is adjusted from optical link transmission to RF link transmission and optical link transmission.

12. The transmission method based on optical communication according to claim 11, characterized in that: The zoom determination comprises: detecting an imaging state of an imaging detector array; When the imaging state changes from the first imaging state to the second imaging state, determining to trigger zooming; Wherein, in the first imaging state, all pixels of the receiving end receive the image of the transmitting end; In the second imaging state, some pixels of the receiving end receive the image of the transmitting end.

13. The transmission method based on optical communication according to claim 12, characterized in that: After determining that zoom is triggered, the method further includes: Perform zoom operation; After the zoom is completed, second zoom indication information is sent to the sending end, where the second zoom indication information indicates whether the zoom is completed.

14. The transmission method based on optical communication according to claim 13, characterized in that: The sending the second zoom indication information to the sending end includes: The second zoom indication information is sent to the transmitting end via a radio frequency RF link and / or an optical link.

15. The transmission method based on optical communication according to claim 11, characterized in that: Sending first zoom indication information according to the result of the zoom determination includes: In the case where the result of the zoom determination indicates that zoom is triggered, the first zoom indication information is sent to the transmitting end via an RF link and / or an optical link.

16. The transmission method based on optical communication according to claim 11, characterized in that: After performing zoom determination, the method further includes: The information of the target pixel point is sent to the sending end, where the target pixel point is the pixel point that can be imaged currently.

17. A transmission device based on optical communication, characterized in that: include: A first receiving module, used for receiving first zoom indication information from a receiving end for instructing the receiving end to perform zooming; A processing module, configured to adjust a downlink transmission mode from a transmitting end to the receiving end according to the first zoom indication information; The downlink transmission mode includes: radio frequency (RF) link transmission; optical link transmission; and RF link transmission and optical link transmission; The processing module comprises: A first processing unit, configured to adjust the downlink transmission mode from optical link transmission to RF link transmission; or, A second processing unit, configured to adjust the downlink transmission mode from optical link transmission using the first precoding array to optical link transmission using the second precoding array; or, The third processing unit is used to adjust the downlink transmission mode from optical link transmission to RF link transmission and optical link transmission.

18. A transmission device based on optical communication, characterized in that: include: A determination module, used for performing zoom determination; A first sending module, configured to send, to a sending end, first zoom indication information for instructing a receiving end to perform zooming according to a result of the zoom determination, so that the sending end adjusts a downlink transmission mode during a process in which the receiving end performs zooming; The adjusting the downlink transmission mode includes: Adjusting the downlink transmission mode from optical link transmission to RF link transmission; or, Adjusting the downlink transmission mode from optical link transmission using the first precoding array to optical link transmission using the second precoding array; or, The downlink transmission mode is adjusted from optical link transmission to RF link transmission and optical link transmission.

19. A communication device, the communication device being a transmitting end, characterized in that: include: transceivers and processors; The transceiver is used to receive first zoom indication information from a receiving end for instructing the receiving end to perform zooming; The processor is used to adjust the downlink transmission mode from the sending end to the receiving end according to the first zoom indication information; The downlink transmission mode includes: radio frequency (RF) link transmission; optical link transmission; and RF link transmission and optical link transmission; When the processor adjusts the downlink transmission mode from the transmitting end to the receiving end according to the first zoom indication information, it is specifically used to: Adjusting the downlink transmission mode from optical link transmission to RF link transmission; or, Adjusting the downlink transmission mode from optical link transmission using the first precoding array to optical link transmission using the second precoding array; or, The downlink transmission mode is adjusted from optical link transmission to RF link transmission and optical link transmission.

20. A communication device, the communication device being a receiving end, characterized in that: include: transceivers and processors; The processor is used to perform zoom determination; The transceiver is used to send first zoom indication information for instructing the receiving end to perform zoom to the transmitting end according to the result of the zoom determination, so that the transmitting end adjusts the downlink transmission mode during the process of the receiving end performing zoom; The adjusting the downlink transmission mode includes: Adjusting the downlink transmission mode from optical link transmission to RF link transmission; or, Adjusting the downlink transmission mode from optical link transmission using the first precoding array to optical link transmission using the second precoding array; or, The downlink transmission mode is adjusted from optical link transmission to RF link transmission and optical link transmission.

21. A communication device comprising: A transceiver, a processor, a memory, and a program or instruction stored in the memory and executable on the processor; characterized in that when the processor executes the program or instruction, it implements the transmission method based on optical communication as described in any one of claims 1-10, or implements the transmission method based on optical communication as described in any one of claims 11-16.

22. A readable storage medium having a program or instruction stored thereon, characterized in that: When the program or instruction is executed by the processor, the transmission method based on optical communication as described in any one of claims 1-10 is implemented, or the transmission method based on optical communication as described in any one of claims 11-16 is implemented.

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