Signal transmission control method, terminal and network equipment

Abstract

A signal transmission control method, terminal, and network device, the method comprising: a first network device receives first information sent by at least one terminal, the first information comprising at least one of a measured clipping ratio and a clipping ratio deviation, wherein the measured clipping ratio is obtained by the terminal measuring an optical signal sent by a second network device, and the clipping ratio deviation is the deviation between the measured clipping ratio and a target clipping ratio; the first network device sends the first information to the second network device, or adjusts the signal transmission scheme of the second network device according to the first information, and sends the adjusted signal transmission scheme to the second network device. The signal transmission control method, terminal, and network device provided in an embodiment of the present invention feed back the measured clipping ratio to the network device via the terminal, so that the network device can adjust the signal transmission scheme accordingly, thereby improving the transmission performance of the optical signal.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless communications, and in particular to a signal transmission control method, a terminal, and a network device. Background Art

[0002] Optical communications (including visible light communications) offer advantages such as abundant spectrum resources, simple deployment, energy-saving technology, and immunity to electromagnetic interference. They can effectively complement current cellular mobile communications and are a potential key technology for future mobile communications. In optical communication systems (visible light communication, VLC), the signal transmission device is typically a light-emitting diode (LED) or a laser diode (LD).

[0003] Orthogonal Frequency-Division Multiplexing (OFDM) technology improves spectrum utilization and supports high data rates, making it widely used in VLC systems. OFDM schemes for VLC systems mainly fall into two categories: direct current biased optical-OFDM (DCO-OFDM) and asymmetrically clipped optical-OFDM (ACO-OFDM).

[0004] Nonlinear distortion in VLC systems is primarily introduced by LEDs. OFDM signals typically exhibit a high peak-to-average ratio in the time domain, which can easily cause nonlinear distortion when passing through LEDs. To ensure that LEDs operate in their linear region and improve electro-optical conversion efficiency, the input LED signal needs to be clipped or limited. The degree of clipping is generally described by the clipping ratio. This is defined as the ratio of the clipping interval to the standard deviation of the signal before clipping, the ratio of the number of sampling points exceeding a preset threshold to the total number of sampling points over a period of time, or the ratio of the difference in signal energy before and after clipping to the signal energy before clipping. The latter two definitions are more commonly used in practical signal generation.

[0005] Figure 1 and Figure 2 The signal transmission process in the DCO-OFDM scheme and the ACO-OFDM scheme is shown.

[0006] 1) In the DCO-OFDM solution, a DC bias is added to make the OFDM signal positive. To prevent the signal from exceeding the linear range of the LED after the DC bias is added, an appropriate DC bias is typically selected to ensure that the majority of the signal is positive, with a small portion still negative. Clipping is then performed to remove the negative signal. The DC bias is generally set at the midpoint of the LED's linear range.

[0007] 2) In the ACO-OFDM scheme, when the signal is OFDM modulated, it is mapped only to odd-numbered subcarriers. The resulting time-domain signal is antisymmetric, with positive and negative signals each accounting for half. Clipping is then performed to remove the negative signal, resulting in a power reduction of half.

[0008] Due to the linear operating region of LED / LD devices, the maximum transmit power of a signal is limited. Higher signal power leads to more severe clipping, a larger clipping ratio, and greater clipping noise. Conversely, lower signal power leads to poorer channel fading resistance, a smaller coverage range, and a smaller clipping ratio. Therefore, an optimal clipping ratio exists—a compromise between signal transmit power and clipping noise that minimizes clipping noise while maximizing coverage. Therefore, it's desirable to select an optimal or near-optimal clipping ratio for the signal.

[0009] Considering the unstable characteristics of LED / LD devices, such as the decrease in electro-optical conversion efficiency with increasing temperature, and the difficulty in achieving the desired clipping ratio during the actual clipping process, the signal clipping ratio may not be the desired clipping ratio. Alternatively, inaccurate channel condition estimation may cause the signal clipping ratio to not match the channel, resulting in performance indicators such as data transmission rate and block error rate failing to meet expectations. Therefore, a method is urgently needed to effectively improve the signal transmission performance of optical signal communication systems. Summary of the Invention

[0010] At least one embodiment of the present invention provides a signal transmission control method, terminal, and network device for improving the signal transmission performance of an optical signal communication system.

[0011] In order to solve the above-mentioned technical problems, the present invention is achieved as follows:

[0012] In a first aspect, an embodiment of the present invention provides a signal transmission control method, including:

[0013] The first network device receives first information sent by at least one terminal, where the first information includes at least one of a measured clipping ratio and a clipping ratio deviation, wherein the measured clipping ratio is obtained by the terminal measuring an optical signal sent by the second network device, and the clipping ratio deviation is a deviation between the measured clipping ratio and a target clipping ratio;

[0014] The first network device sends the first information to the second network device, or adjusts a signal sending scheme of the second network device according to the first information, and sends the adjusted signal sending scheme to the second network device.

[0015] Optionally, the first information further includes first indication information for indicating that the clipping ratio is abnormal or requesting adjustment of a signal sending scheme of the second network device.

[0016] Optionally, the target clipping ratio is a clipping ratio expected by the terminal or a clipping ratio configured by the network.

[0017] Optionally, the signal sending scheme includes at least one of the following: a clipping ratio, a modulation type, and a coding efficiency adopted by the optical communication system.

[0018] Optionally, also include:

[0019] The first network device sends second information to the terminal and / or the second network device, where the second information includes at least one of the following information: second instruction information for instructing the terminal to perform clipping ratio measurement, a target clipping ratio, and waveform information of the optical signal sent by the second network device.

[0020] Optionally, adjusting a signal sending scheme of the second network device according to the first information includes:

[0021] Obtaining a first clipping ratio deviation according to the first information sent by the at least one terminal;

[0022] According to the relationship between the first clipping ratio deviation and the preset threshold, a signal sending scheme of the second network device is adjusted.

[0023] Optionally, adjusting the signal sending scheme of the second network device according to the relationship between the first clipping ratio deviation and a preset threshold includes:

[0024] When the first clipping ratio deviation is greater than a first threshold, adjusting the signal transmission scheme of the second network device includes at least one of the following: increasing the clipping ratio adopted by the optical communication system, reducing the order of the modulation type, and reducing the coding efficiency;

[0025] When the first clipping ratio deviation is less than a second threshold, adjusting the signal sending scheme of the second network device includes at least one of the following: reducing the clipping ratio used by the optical communication system, increasing the order of the modulation type, and improving coding efficiency.

[0026] Optionally, the first threshold and the second threshold are predefined thresholds, or thresholds configured by the network, or thresholds set by the terminal.

[0027] Optionally, obtaining a first clipping ratio deviation according to the first information sent by the at least one terminal includes:

[0028] In a case where the at least one terminal includes only one terminal, the first clipping ratio deviation is the clipping ratio deviation of the one terminal;

[0029] In a case where the at least one terminal includes at least two terminals, the first clipping ratio deviation is generated according to the clipping ratio deviations of the at least two terminals.

[0030] In a second aspect, an embodiment of the present invention provides a signal transmission control method, including:

[0031] The second network device obtains an adjusted signal transmission scheme, wherein the adjusted signal transmission scheme is obtained by adjusting the signal transmission scheme of the second network device according to first information from at least one terminal, the first information including at least one of a measured clipping ratio and a clipping ratio deviation, wherein the measured clipping ratio is obtained by the terminal measuring an optical signal sent by the second network device, and the clipping ratio deviation is a deviation between the measured clipping ratio and a target clipping ratio;

[0032] The second network device sends a signal according to the adjusted signal sending scheme.

[0033] Optionally, the first information further includes first indication information for indicating that the clipping ratio is abnormal or requesting adjustment of a signal sending scheme of the second network device.

[0034] Optionally, the target clipping ratio is a clipping ratio expected by the terminal or a clipping ratio configured by the network.

[0035] Optionally, the signal sending scheme includes at least one of the following: a clipping ratio, a modulation type, and a coding efficiency adopted by the optical communication system.

[0036] Optionally, the second network device obtaining the adjusted signal sending scheme includes:

[0037] The second network device receives the adjusted signal transmission scheme sent by the first network device; or,

[0038] The second network device receives first information from at least one terminal sent by the first network device, and adjusts a signal sending scheme of the second network device according to the first information to obtain an adjusted signal sending scheme.

[0039] Optionally, adjusting a signal sending scheme of the second network device according to the first information includes:

[0040] Obtaining a first clipping ratio deviation according to the first information sent by the at least one terminal;

[0041] According to the relationship between the first clipping ratio deviation and the preset threshold, a signal sending scheme of the second network device is adjusted.

[0042] Optionally, adjusting the signal sending scheme of the second network device according to the relationship between the first clipping ratio deviation and a preset threshold includes:

[0043] When the first clipping ratio deviation is greater than a first threshold, adjusting the signal transmission scheme of the second network device includes at least one of the following: increasing the clipping ratio adopted by the optical communication system, reducing the order of the modulation type, and reducing the coding efficiency;

[0044] When the first clipping ratio deviation is less than a second threshold, adjusting the signal sending scheme of the second network device includes at least one of the following: reducing the clipping ratio used by the optical communication system, increasing the order of the modulation type, and improving coding efficiency.

[0045] Optionally, the first threshold and the second threshold are predefined thresholds, or thresholds configured by the network, or thresholds set by the terminal.

[0046] Optionally, obtaining a first clipping ratio deviation according to the first information sent by the at least one terminal includes:

[0047] In a case where the at least one terminal includes only one terminal, the first clipping ratio deviation is the clipping ratio deviation of the one terminal;

[0048] In a case where the at least one terminal includes at least two terminals, the first clipping ratio deviation is generated according to the clipping ratio deviations of the at least two terminals.

[0049] In a third aspect, an embodiment of the present invention provides a signal transmission control method, including:

[0050] The first terminal measures a clipping ratio of an optical signal sent by the second network device to obtain a measured clipping ratio;

[0051] The first terminal sends first information to the first network device, where the first information includes at least one of a measured clipping ratio and a clipping ratio deviation, wherein the clipping ratio deviation is a deviation between the measured clipping ratio and a target clipping ratio.

[0052] Optionally, the first terminal sending the first information to the first network device includes:

[0053] When the clipping ratio deviation is greater than a preset threshold, the first terminal sends first information to the first network device, wherein the first information also includes first indication information for indicating that the clipping ratio is abnormal or requesting adjustment of the signal sending scheme of the second network device.

[0054] Optionally, also include:

[0055] The first terminal receives second information sent by the first network device or the second network device, where the second information includes at least one of the following information: second indication information for instructing the terminal to perform clipping ratio measurement, target clipping ratio, and waveform information of the optical signal sent by the second network device.

[0056] Optionally, the first terminal measuring the clipping ratio of the optical signal sent by the second network device includes:

[0057] The first terminal counts the peak value and standard deviation of the optical signal sent by the second network device and received within the first time window, and estimates multiple clipping ratio estimation values ​​based on the waveform, peak value and standard deviation of the optical signal;

[0058] The first terminal determines the measured clipping ratio according to the multiple clipping ratio estimation values.

[0059] In a fourth aspect, an embodiment of the present invention provides a first network device, characterized in that it includes a transceiver and a processor, wherein:

[0060] The transceiver is configured to receive first information sent by at least one terminal, the first information including at least one of a measured clipping ratio and a clipping ratio deviation, wherein the measured clipping ratio is obtained by measuring an optical signal sent by the terminal to a second network device, and the clipping ratio deviation is a deviation between the measured clipping ratio and a target clipping ratio;

[0061] The processor is configured to send the first information to the second network device, or adjust a signal sending scheme of the second network device according to the first information, and send the adjusted signal sending scheme to the second network device.

[0062] In a fifth aspect, an embodiment of the present invention provides a first network device, comprising: a processor, a memory, and a program stored on the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the method described in the first aspect.

[0063] In a sixth aspect, an embodiment of the present invention provides a second network device, including a transceiver and a processor, wherein:

[0064] The transceiver is configured to obtain an adjusted signal transmission scheme, wherein the adjusted signal transmission scheme is obtained by adjusting the signal transmission scheme of the second network device based on first information from at least one terminal, the first information including at least one of a measured clipping ratio and a clipping ratio deviation, wherein the measured clipping ratio is obtained by measuring an optical signal sent by the terminal to the second network device, and the clipping ratio deviation is a deviation between the measured clipping ratio and a target clipping ratio;

[0065] The transceiver is used to send signals according to the adjusted signal sending scheme.

[0066] In the seventh aspect, an embodiment of the present invention provides a second network device, comprising: a processor, a memory, and a program stored on the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the method described in the second aspect.

[0067] In an eighth aspect, an embodiment of the present invention provides a terminal, including a transceiver and a processor, wherein:

[0068] The processor is configured to measure a clipping ratio of an optical signal sent by the second network device to obtain a measured clipping ratio;

[0069] The transceiver is configured to send first information to a first network device, where the first information includes at least one of a measured clipping ratio and a clipping ratio deviation, wherein the clipping ratio deviation is a deviation between the measured clipping ratio and a target clipping ratio.

[0070] In the ninth aspect, an embodiment of the present invention provides a terminal comprising: a processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the method described in the third aspect.

[0071] In a tenth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a program is stored. When the program is executed by a processor, the steps of the method described above are implemented.

[0072] Compared with the prior art, the signal transmission control method, terminal, and network device provided in the embodiments of the present invention feed back the measured clipping ratio to the network device via the terminal, so that the network device can adjust the signal transmission scheme accordingly, thereby improving the transmission performance of the optical signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0074] Figure 1 A schematic diagram of a signal transmission process of a DCO-OFDM solution in the prior art;

[0075] Figure 2 A schematic diagram of a signal transmission process of an ACO-OFDM solution in the prior art;

[0076] Figure 3 A schematic diagram of an application scenario of an embodiment of the present invention;

[0077] Figure 4 A flow chart of a signal transmission control method according to an embodiment of the present invention;

[0078] Figure 5 Another flow chart of a signal transmission control method according to an embodiment of the present invention;

[0079] Figure 6 Another flow chart of a signal transmission control method according to an embodiment of the present invention;

[0080] Figure 7 This is a schematic structural diagram of a first network device according to an embodiment of the present invention;

[0081] Figure 8 is another structural schematic diagram of a first network device according to another embodiment of the present invention;

[0082] Figure 9 This is a schematic structural diagram of a second network device according to an embodiment of the present invention;

[0083] Figure 10 is another structural diagram of a second network device according to another embodiment of the present invention;

[0084] Figure 11 This is a schematic structural diagram of a terminal according to an embodiment of the present invention;

[0085] Figure 12 is another structural schematic diagram of a terminal according to another embodiment of the present invention;

[0086] Figure 13 This is another structural diagram of a first network device according to yet another embodiment of the present invention;

[0087] Figure 14 This is another structural diagram of a second network device according to yet another embodiment of the present invention;

[0088] Figure 15 FIG. 4 is another structural diagram of a terminal according to yet another embodiment of the present invention. DETAILED DESCRIPTION

[0089] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0090] The terms "first", "second" etc. in the specification and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable in appropriate circumstances, so that the embodiments of the present application described herein, for example, can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprise" and "have" and any of their variations are intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment comprising a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or that are intrinsic to these processes, methods, products or equipment. "And / or" in the specification and claims represents at least one of the connected objects.

[0091] The following description provides examples and does not limit the scope, applicability, or configuration set forth in the claims. Changes may be made to the function and arrangement of the elements discussed without departing from the spirit and scope of this disclosure. The various examples may appropriately omit, substitute, or add various procedures or components. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0092] In the embodiment of the present invention, the terminal measures the clipping ratio and feeds back the error between the actual value and the expected value of the clipping ratio to the base station, and the base station then dynamically adjusts the clipping ratio or the modulation and coding scheme. Figure 3 A schematic diagram of an application scenario of an embodiment of the present invention is provided. Specifically, the first network device can be a radio frequency base station, for example, one operating in a frequency band below 3 THz. The second network device can be an optical communication base station using visible light or laser communication, including base stations operating in the visible light band or laser band. Given the difficulty of implementing optical uplink transmission in practical applications, optical communication is typically combined with other wireless access methods to achieve heterogeneous networking. Figure 3Taking radio frequency as an example, in heterogeneous networking, it is assumed that optical communication only has downlink transmission and no uplink transmission; radio frequency links have both uplink and downlink transmission, such as Figure 3 shown.

[0093] Please refer to Figure 4 , an embodiment of the present invention provides a signal transmission control method, when applied to a first network device side, including:

[0094] In step 41, a first network device receives first information sent by at least one terminal, where the first information includes at least one of a measured clipping ratio and a clipping ratio deviation. The measured clipping ratio is obtained by the terminal measuring an optical signal sent by a second network device, and the clipping ratio deviation is a deviation between the measured clipping ratio and a target clipping ratio.

[0095] Here, the first network device may be a radio frequency base station, and the second network device may be an optical communication base station. The terminal measures the optical signal transmitted by the second network device to obtain a measured clipping ratio of the optical signal. Optionally, the terminal may calculate a clipping ratio deviation between the measured clipping ratio and a pre-determined target clipping ratio. The terminal then transmits first information including the measured clipping ratio and / or the clipping ratio deviation to the first network device. The target clipping ratio may be a clipping ratio desired by the terminal or a clipping ratio configured by the network.

[0096] Step 42: The first network device sends the first information to the second network device, or adjusts the signal sending scheme of the second network device according to the first information, and sends the adjusted signal sending scheme to the second network device.

[0097] Here, after receiving the first information, the first network device can directly send the first information to the second network device, so that the second network device adjusts the signal transmission scheme of the second network device based on the first information. The first network device can also adjust the signal transmission scheme of the second network device based on the first information, and then send the adjusted signal transmission scheme to the second network device. Optionally, the signal transmission scheme includes at least one of the following: a clipping ratio, modulation type, and coding efficiency used by the optical communication system. The optical communication system is the system used by the second network device (optical communication base station) to transmit optical signals.

[0098] Through the above steps, in the embodiment of the present invention, the network device can adjust the signal transmission scheme of the optical signal according to the measured clipping ratio and / or clipping ratio deviation fed back by the terminal, thereby improving the signal transmission performance of the optical communication base station.

[0099] Optionally, the first information sent by the terminal may further include: first indication information for indicating a clipping ratio abnormality or requesting adjustment of the signal transmission scheme of the second network device, so as to instruct the network device to adjust the signal transmission scheme of the second network device. In addition, the first indication information may include identification information of the targeted second network device, such as the device identification, cell identification, or beam identification of the second network device. For example, after receiving the first information including the first request message, the first network device sends the first information to the corresponding second network device, or determines the adjusted signal transmission scheme based on the first information and sends it to the corresponding second network device. When the first information is received without the first request message, the first network device may not forward the first information, or may not adjust the signal transmission scheme. Of course, in an embodiment of the present invention, the first network device may also determine whether to adjust the signal transmission scheme based on the clipping ratio deviation carried in the first information. In this case, the first information may or may not carry the first request message.

[0100] In an embodiment of the present invention, the terminal can perform clipping ratio measurement on the optical signal of the optical communication base station according to the instruction of the network device. In addition, the network device can also send the target clipping ratio and / or the waveform information of the optical signal sent by the second network device to the terminal to help the terminal perform clipping ratio measurement or calculate the clipping ratio deviation. Here, the target clipping ratio is the clipping ratio configured on the network side or the predefined clipping ratio; the waveform information of the optical signal can be represented by the OFDM type, specifically including but not limited to DCO-OFDM waveform, ACO-OFDM waveform and other information. Specifically, the first network device can send second information to the terminal, and the second information includes at least one of the following information: second indication information for instructing the terminal to perform clipping ratio measurement, target clipping ratio, and waveform information of the optical signal sent by the second network device. Alternatively, the first network device sends the second information to the second network device, and then the second network device sends the second information to the terminal.

[0101] In an embodiment of the present invention, the first network device may adjust the signal transmission scheme of the second network device based on the first information, i.e., determine an adjusted signal transmission scheme. The signal transmission scheme may generally include configuration parameters such as the clipping ratio, modulation type, and coding efficiency used by the optical communication system. Specifically, adjusting the signal transmission scheme may include:

[0102] a) The first network device may obtain a first clipping ratio deviation according to the first information sent by the at least one terminal.

[0103] Here, when the at least one terminal includes only one terminal, the first clipping ratio deviation is the clipping ratio deviation of the one terminal; when the at least one terminal includes at least two terminals, the first clipping ratio deviation is generated based on the clipping ratio deviations of the at least two terminals.

[0104] If the first network device receives first information fed back by at least two terminals within a preset period of time, thereby obtaining the clipping ratio deviations of the at least two terminals, the first clipping ratio deviation may be generated based on the clipping ratio deviations of the at least two terminals.

[0105] For example, the average value of the clipping ratio deviations of at least two terminals can be calculated, and the calculated result can be used as the first clipping ratio deviation. For another example, a weighted sum of the clipping ratio deviations of at least two terminals can be calculated, and the calculated result can be used as the first clipping ratio deviation. The weight value of each terminal can be set according to a preset rule, such as the importance of the terminal service, the distance between the terminals, and other factors. The embodiments of the present invention do not specifically limit the specific calculation method.

[0106] b) Then, according to the relationship between the first clipping ratio deviation and a preset threshold, adjusting the signal sending scheme of the second network device.

[0107] For example, when the first clipping ratio deviation is greater than a first threshold, adjusting the signal transmission scheme of the second network device includes at least one of the following: increasing the clipping ratio used by the optical communication system, reducing the order of the modulation type, or reducing the coding efficiency. When the clipping ratio deviation is greater than the first threshold, it may be due to the temperature of the second network device being too high, resulting in a reduction in the linear region, or it may be due to poor actual channel quality. In this case, the second network device may increase the clipping ratio to increase the average power of the signal and improve the received signal-to-noise ratio; or select a lower-order modulation scheme or a lower bit rate to improve data demodulation accuracy and reduce the bit error rate or block error rate.

[0108] For another example, when the first clipping ratio deviation is less than a second threshold, adjusting the signal transmission scheme of the second network device includes at least one of the following: reducing the clipping ratio used by the optical communication system, increasing the order of the modulation type, and improving coding efficiency. When the clipping ratio deviation is less than the second threshold, perhaps because the actual channel quality is good, the second network device may reduce the clipping ratio, thereby reducing the average power of the signal and reducing the power consumption of the second network device to achieve energy conservation; or select a higher-order modulation scheme or a higher code rate to improve spectral efficiency and data transmission rate.

[0109] Here, the first threshold and the second threshold are predefined thresholds, or thresholds configured by the network, or thresholds set by the terminal (depending on the terminal implementation). Generally, the first threshold is greater than the second threshold.

[0110] Please refer to Figure 5 The signal transmission control method provided by the embodiment of the present invention, when applied to the second network device side, includes:

[0111] In step 51, the second network device obtains an adjusted signal sending scheme, wherein the adjusted signal sending scheme is obtained by adjusting the signal sending scheme of the second network device based on first information from at least one terminal, and the first information includes at least one of a measured clipping ratio and a clipping ratio deviation, wherein the measured clipping ratio is obtained by measuring the optical signal sent by the terminal to the second network device, and the clipping ratio deviation is the deviation between the measured clipping ratio and a target clipping ratio.

[0112] Here, the second network device may be an optical communication base station, and the first network device may be a radio frequency base station. The second network device receives the adjusted signal transmission scheme sent by the first network device; alternatively, the second network device receives first information from at least one terminal sent by the first network device and adjusts the signal transmission scheme of the second network device based on the first information to obtain the adjusted signal transmission scheme. The signal transmission scheme includes at least one of the following: a clipping ratio, a modulation type, and a coding efficiency used by the optical communication system.

[0113] Step 52: The second network device sends a signal according to the adjusted signal sending scheme.

[0114] Through the above steps, the network device can adjust the signal transmission scheme of the optical signal based on the measured clipping ratio and / or clipping ratio deviation fed back by the terminal, thereby improving the signal transmission performance of the optical communication base station.

[0115] Optionally, the first information further includes first indication information for indicating that the clipping ratio is abnormal or requesting adjustment of a signal sending scheme of the second network device;

[0116] Similarly, in step 51 above, the second network device adjusts its signal transmission scheme based on the first information. This may specifically include: obtaining a first clipping ratio deviation based on the first information sent by the at least one terminal; wherein, if the at least one terminal includes only one terminal, the first clipping ratio deviation is the clipping ratio deviation of the one terminal; and if the at least one terminal includes at least two terminals, the first clipping ratio deviation is generated based on the clipping ratio deviations of the at least two terminals. The specific generation method can be referred to the description above and will not be repeated here. Then, based on the relationship between the first clipping ratio deviation and a preset threshold, the signal transmission scheme of the second network device is adjusted.

[0117] For example, when the first clipping ratio deviation is greater than the first threshold, adjusting the signal sending scheme of the second network device includes at least one of the following: increasing the clipping ratio adopted by the optical communication system, reducing the order of the modulation type, and reducing the coding efficiency; when the first clipping ratio deviation is less than the second threshold, adjusting the signal sending scheme of the second network device includes at least one of the following: reducing the clipping ratio adopted by the optical communication system, increasing the order of the modulation type, and improving the coding efficiency.

[0118] Optionally, the first threshold and the second threshold are predefined thresholds, or thresholds configured by the network, or thresholds set by the terminal.

[0119] Please refer to Figure 6 The signal transmission control method provided by the embodiment of the present invention, when applied to a first terminal, includes:

[0120] In step 61 , the first terminal measures a clipping ratio of an optical signal sent by a second network device to obtain a measured clipping ratio.

[0121] Here, the first terminal can count the peak value and standard deviation of the optical signal sent by the second network device and received within the first time window, and estimate multiple clipping ratio estimation values ​​based on the waveform, peak value and standard deviation of the optical signal. The relationship between the clipping ratio and the peak value and standard deviation can be: the clipping ratio is proportional to the ratio of the peak value to the standard deviation, and the proportional coefficient between the clipping ratio and the ratio can be determined according to the waveform of the signal. The first time window can be predefined, or configured by the network side, or depend on the terminal implementation. Then, the first terminal determines the measured clipping ratio based on the multiple clipping ratio estimation values, for example, by calculating the average value of the multiple clipping ratio estimation values ​​to obtain the measured clipping ratio. In this way, after performing multiple clipping ratio estimations, the final measured clipping ratio is determined by combining the multiple clipping ratio estimation values ​​to improve the accuracy of the clipping ratio measurement.

[0122] Step 62: The first terminal sends first information to the first network device, where the first information includes at least one of a measured clipping ratio and a clipping ratio deviation, wherein the clipping ratio deviation is a deviation between the measured clipping ratio and a target clipping ratio.

[0123] Here, when the first information includes a clipping ratio deviation, the first terminal calculates a deviation between the measured clipping ratio and a target clipping ratio to obtain the clipping ratio deviation.

[0124] The first terminal may obtain the target clipping ratio from the network side in advance and determine the first information to be fed back based on the measured clipping ratio and the target clipping ratio, or the first terminal may determine the first information to be fed back based on the measured clipping ratio and its own needs. The specific determination method is: calculating the deviation between the estimated value of the clipping ratio and the target clipping ratio required by itself. In order to reduce the amount of information transmitted, the first terminal may send the first information to the first network device only when the clipping ratio deviation is greater than a preset threshold. Optionally, at this time, the first information also includes first indication information for indicating a clipping ratio abnormality or requesting adjustment of the signal transmission scheme of the second network device.

[0125] Through the above steps, the embodiment of the present invention feeds back the first information to the network device through the terminal, which can help the network device to timely adjust the signal transmission scheme of the optical communication base station and improve the transmission performance of the optical signal.

[0126] In an embodiment of the present invention, a first terminal may measure a clipping ratio based on an instruction from a network device. In this case, the first terminal may receive second information sent by the first network device or the second network device, where the second information includes at least one of the following: second instruction information instructing the terminal to measure the clipping ratio, a target clipping ratio, and waveform information of an optical signal sent by the second network device.

[0127] In addition, when the first time window is configured by the network side, the second information may further include configuration information of the first time window, such as parameters such as the length of the time window.

[0128] The above method is further illustrated below by taking an example of an interaction process between devices.

[0129] In this example, the first network device is a radio frequency base station, and the second network device is a visible light base station. The terminal receives signals and indication information only from the visible light base station. The first information is fed back to the radio frequency base station via the radio frequency link. The radio frequency base station then determines the signal transmission scheme and notifies the visible light base station. The radio frequency base station determines the signal transmission scheme for the visible light base station based on the information fed back by the terminal, specifically including:

[0130] 1. The visible light base station generates a signal to be transmitted using a predefined target clipping ratio, k, and notifies the terminal of the need to measure the clipping ratio through RRC signaling (or, alternatively, Downlink Control Information (DCI)). Assuming the linear operating region of the LED is [0, B], the signal is amplified accordingly based on the definition of the clipping ratio, ensuring that the ratio of the number of sampling points exceeding the preset threshold to the total number of sampling points is as close to k as possible.

[0131] 2. After receiving RRC signaling (which may also be downlink control information DCI, etc.), the terminal measures the actual clipping ratio and obtains the measured clipping ratio:

[0132] (1) Measure the peak value A and standard deviation σ of the signal within a predefined time window.

[0133] (2) Obtain waveform parameters from the visible light base station.

[0134] If it is a DCO-OFDM waveform, the clipping ratio is 1 / 2 of the ratio of the peak value to the standard deviation;

[0135] If it is an ACO-OFDM waveform, the clipping ratio is the ratio of the peak value to the standard deviation.

[0136] (3) Measure the clipping ratio N times continuously to obtain the estimated clipping ratio Take the root mean square (RMS) average as the measurement of the clipping ratio Right now

[0137] Measuring principle:

[0138] (1) For DCO-OFDM waveforms, the clipping ratio is the ratio of the signal peak value to the standard deviation before applying a DC bias. Since the signal peak value after applying a DC bias is equal to the upper limit of the LED's linear operating range, and the DC bias is usually the midpoint of the linear operating range, the signal peak value before applying a DC bias is A / 2. The standard deviation remains unchanged before and after applying a DC bias. Therefore, when directly measuring the received signal's peak value to the standard deviation, the ratio is twice the clipping ratio.

[0139] (2) For ACO-OFDM waveforms, the clipping ratio is the ratio of the peak value to the standard deviation of the signal before clipping. Since the ACO-OFDM waveform has an antisymmetric characteristic, clipping will cut off half of the signal, the peak value remains unchanged, and the variance is halved accordingly. Therefore, for the received signal, the ratio of the signal peak value to the standard deviation is directly measured. times

[0140] 3. Calculate the clipping ratio deviation:

[0141] a) The first indication information is used to request adjustment of the signal transmission scheme of the second network device. The terminal customizes the target clipping ratio as k based on its perception of the environment and its own capabilities, and calculates the measured clipping ratio If the clipping ratio deviation is greater than a preset threshold, first information including the first indication information and the clipping ratio deviation is reported.

[0142] b) The first indication information is used to indicate that the clipping ratio is abnormal. The terminal obtains the configured target clipping ratio from the network side and calculates the measured If the clipping ratio deviation is greater than a preset threshold, first information including the first indication information and the clipping ratio deviation is reported.

[0143] 4. After receiving the first information, the radio frequency base station adjusts the signal transmission scheme according to the clipping ratio deviation:

[0144] c) if the clipping ratio error is greater than the first threshold, increasing the clipping ratio used by the optical communication system, or selecting a lower-order modulation scheme or a lower bit rate;

[0145] d) If the clipping ratio error is less than the second threshold, the clipping ratio used by the optical communication system is reduced, or a higher-order modulation scheme or a high code rate is selected.

[0146] 5. If the radio base station receives first information from multiple terminals simultaneously or within a period of time, it calculates the average value of the clipping ratio errors reported by the multiple terminals, and then adjusts the signal transmission scheme according to step 4 based on the average value of the clipping ratio deviations.

[0147] 6. The RF base station informs the visible light base station of the adjusted signal transmission scheme, so that the visible light base station sends a signal to the terminal according to the adjusted signal transmission scheme.

[0148] The above describes various methods of the embodiments of the present invention. The following further provides apparatuses for implementing the above methods.

[0149] Please refer to Figure 7 The embodiment of the present invention further provides a first network device 700, including:

[0150] A first receiving module 701 is configured to receive first information sent by at least one terminal, where the first information includes at least one of a measured clipping ratio and a clipping ratio deviation, wherein the measured clipping ratio is obtained by measuring an optical signal sent by the terminal to a second network device, and the clipping ratio deviation is a deviation between the measured clipping ratio and a target clipping ratio;

[0151] The first sending module 702 is configured to send the first information to the second network device, or adjust a signal sending scheme of the second network device according to the first information, and send the adjusted signal sending scheme to the second network device.

[0152] Optionally, the first information further includes first indication information for indicating that the clipping ratio is abnormal or requesting adjustment of a signal sending scheme of the second network device.

[0153] Optionally, the target clipping ratio is a clipping ratio expected by the terminal or a clipping ratio configured by the network.

[0154] Optionally, the signal sending scheme includes at least one of the following: a clipping ratio, a modulation type, and a coding efficiency adopted by the optical communication system.

[0155] Optionally, the first network device 700 further includes:

[0156] The second sending module is used to send second information to the terminal and / or the second network device, where the second information includes at least one of the following information: second indication information for instructing the terminal to perform clipping ratio measurement, the target clipping ratio, and waveform information of the optical signal sent by the second network device.

[0157] Optionally, the first sending module is further used to obtain a first clipping ratio deviation based on the first information sent by the at least one terminal; and adjust the signal sending scheme of the second network device based on the relationship between the first clipping ratio deviation and a preset threshold.

[0158] Optionally, the first sending module is further configured to:

[0159] When the first clipping ratio deviation is greater than a first threshold, adjusting the signal transmission scheme of the second network device includes at least one of the following: increasing the clipping ratio adopted by the optical communication system, reducing the order of the modulation type, and reducing the coding efficiency;

[0160] When the first clipping ratio deviation is less than a second threshold, adjusting the signal sending scheme of the second network device includes at least one of the following: reducing the clipping ratio used by the optical communication system, increasing the order of the modulation type, and improving coding efficiency.

[0161] Optionally, the first threshold and the second threshold are predefined thresholds, or thresholds configured by the network, or thresholds set by the terminal.

[0162] Optionally, the first sending module is further used to, when the at least one terminal includes only one terminal, the first clipping ratio deviation is the clipping ratio deviation of the one terminal; when the at least one terminal includes at least two terminals, the first clipping ratio deviation is generated based on the clipping ratio deviations of the at least two terminals.

[0163] It should be noted that the device in this embodiment corresponds to the method applied to the first network device side. The implementation methods in the above embodiments are all applicable to the embodiments of this device and can achieve the same technical effects. The above device provided in the embodiment of the present invention can implement all the method steps implemented in the above method embodiment and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be detailed here.

[0164] Please refer to Figure 8, an embodiment of the present invention further provides a first network device 800, comprising: a transceiver 801 and a processor 802;

[0165] The transceiver 801 is configured to receive first information sent by at least one terminal, where the first information includes at least one of a measured clipping ratio and a clipping ratio deviation, wherein the measured clipping ratio is obtained by measuring an optical signal sent by the terminal to a second network device, and the clipping ratio deviation is a deviation between the measured clipping ratio and a target clipping ratio;

[0166] The processor 802 is configured to send the first information to the second network device, or adjust a signal sending scheme of the second network device according to the first information, and send the adjusted signal sending scheme to the second network device.

[0167] Optionally, the first information further includes first indication information for indicating that the clipping ratio is abnormal or requesting adjustment of a signal sending scheme of the second network device.

[0168] Optionally, the target clipping ratio is a clipping ratio expected by the terminal or a clipping ratio configured by the network.

[0169] Optionally, the signal sending scheme includes at least one of the following: a clipping ratio, a modulation type, and a coding efficiency adopted by the optical communication system.

[0170] Optionally, the transceiver is also used to send second information to the terminal and / or the second network device, and the second information includes at least one of the following information: second indication information for instructing the terminal to perform clipping ratio measurement, target clipping ratio, and waveform information of the optical signal sent by the second network device.

[0171] Optionally, the processor is further configured to obtain a first clipping ratio deviation based on the first information sent by the at least one terminal; and adjust a signal sending scheme of the second network device based on a relationship between the first clipping ratio deviation and a preset threshold.

[0172] Optionally, the processor is further configured to:

[0173] When the first clipping ratio deviation is greater than a first threshold, adjusting the signal transmission scheme of the second network device includes at least one of the following: increasing the clipping ratio adopted by the optical communication system, reducing the order of the modulation type, and reducing the coding efficiency;

[0174] When the first clipping ratio deviation is less than a second threshold, adjusting the signal sending scheme of the second network device includes at least one of the following: reducing the clipping ratio used by the optical communication system, increasing the order of the modulation type, and improving coding efficiency.

[0175] Optionally, the first threshold and the second threshold are predefined thresholds, or thresholds configured by the network, or thresholds set by the terminal.

[0176] Optionally, the processor is further configured to, when the at least one terminal includes only one terminal, the first clipping ratio deviation is the clipping ratio deviation of the one terminal; and when the at least one terminal includes at least two terminals, the first clipping ratio deviation is generated based on the clipping ratio deviations of the at least two terminals.

[0177] It should be noted that the device in this embodiment corresponds to the method applied to the first network device side. The implementation methods in the above embodiments are all applicable to the embodiments of this device and can achieve the same technical effects. The above device provided in the embodiment of the present invention can implement all the method steps implemented in the above method embodiment and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be detailed here.

[0178] Please refer to Figure 9 The embodiment of the present invention further provides a second network device 900, including:

[0179] A first obtaining module 901 is configured to obtain an adjusted signal transmission scheme, wherein the adjusted signal transmission scheme is obtained by adjusting the signal transmission scheme of the second network device according to first information from at least one terminal, wherein the first information includes at least one of a measured clipping ratio and a clipping ratio deviation, wherein the measured clipping ratio is obtained by measuring the optical signal sent by the terminal to the second network device, and the clipping ratio deviation is a deviation between the measured clipping ratio and a target clipping ratio;

[0180] The first sending module 902 is configured to send a signal according to the adjusted signal sending scheme.

[0181] Optionally, the first information further includes first indication information for indicating that the clipping ratio is abnormal or requesting adjustment of a signal sending scheme of the second network device.

[0182] Optionally, the target clipping ratio is a clipping ratio expected by the terminal or a clipping ratio configured by the network.

[0183] Optionally, the signal sending scheme includes at least one of the following: a clipping ratio, a modulation type, and a coding efficiency adopted by the optical communication system.

[0184] Optionally, the first acquisition module 901 is also used to receive the adjusted signal sending scheme sent by the first network device; or, to receive the first information sent by the first network device from at least one terminal, and adjust the signal sending scheme of the second network device according to the first information to obtain the adjusted signal sending scheme.

[0185] Optionally, the first obtaining module 901 is further used to obtain a first clipping ratio deviation based on the first information sent by the at least one terminal; and adjust the signal sending scheme of the second network device based on the relationship between the first clipping ratio deviation and a preset threshold.

[0186] Optionally, the first obtaining module 901 is further configured to:

[0187] When the first clipping ratio deviation is greater than a first threshold, adjusting the signal transmission scheme of the second network device includes at least one of the following: increasing the clipping ratio adopted by the optical communication system, reducing the order of the modulation type, and reducing the coding efficiency;

[0188] When the first clipping ratio deviation is less than a second threshold, adjusting the signal sending scheme of the second network device includes at least one of the following: reducing the clipping ratio used by the optical communication system, increasing the order of the modulation type, and improving coding efficiency.

[0189] Optionally, the first threshold and the second threshold are predefined thresholds, or thresholds configured by the network, or thresholds set by the terminal.

[0190] Optionally, the first obtaining module 901 is further configured to:

[0191] In a case where the at least one terminal includes only one terminal, the first clipping ratio deviation is the clipping ratio deviation of the one terminal;

[0192] In a case where the at least one terminal includes at least two terminals, the first clipping ratio deviation is generated according to the clipping ratio deviations of the at least two terminals.

[0193] It should be noted that the device in this embodiment corresponds to the method applied to the second network device side. The implementation methods in the above embodiments are all applicable to the embodiments of this device and can achieve the same technical effects. The above device provided by the embodiment of the present invention can implement all the method steps implemented in the above method embodiment and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be detailed here.

[0194] Please refer to Figure 10 , an embodiment of the present invention further provides a network device 1000, comprising: a transceiver 1001 and a processor 1002;

[0195] The processor 1002 is configured to obtain an adjusted signal transmission scheme, where the adjusted signal transmission scheme is obtained by adjusting the signal transmission scheme of the second network device according to first information from at least one terminal, where the first information includes at least one of a measured clipping ratio and a clipping ratio deviation, where the measured clipping ratio is obtained by the terminal measuring an optical signal sent by the second network device, and the clipping ratio deviation is a deviation between the measured clipping ratio and a target clipping ratio;

[0196] The transceiver 1001 sends signals according to the adjusted signal sending scheme.

[0197] Optionally, the first information further includes first indication information for indicating that the clipping ratio is abnormal or requesting adjustment of a signal sending scheme of the second network device.

[0198] Optionally, the target clipping ratio is a clipping ratio expected by the terminal or a clipping ratio configured by the network.

[0199] Optionally, the signal sending scheme includes at least one of the following: a clipping ratio, a modulation type, and a coding efficiency adopted by the optical communication system.

[0200] Optionally, the processor is also used to receive an adjusted signal sending scheme sent by the first network device; or, receive first information from at least one terminal sent by the first network device, and adjust the signal sending scheme of the second network device according to the first information to obtain an adjusted signal sending scheme.

[0201] Optionally, the processor is further configured to obtain a first clipping ratio deviation based on the first information sent by the at least one terminal; and adjust a signal sending scheme of the second network device based on a relationship between the first clipping ratio deviation and a preset threshold.

[0202] Optionally, the processor is further configured to:

[0203] When the first clipping ratio deviation is greater than a first threshold, adjusting the signal transmission scheme of the second network device includes at least one of the following: increasing the clipping ratio adopted by the optical communication system, reducing the order of the modulation type, and reducing the coding efficiency;

[0204] When the first clipping ratio deviation is less than a second threshold, adjusting the signal sending scheme of the second network device includes at least one of the following: reducing the clipping ratio used by the optical communication system, increasing the order of the modulation type, and improving coding efficiency.

[0205] Optionally, the first threshold and the second threshold are predefined thresholds, or thresholds configured by the network, or thresholds set by the terminal.

[0206] Optionally, the processor is further configured to:

[0207] In a case where the at least one terminal includes only one terminal, the first clipping ratio deviation is the clipping ratio deviation of the one terminal;

[0208] In a case where the at least one terminal includes at least two terminals, the first clipping ratio deviation is generated according to the clipping ratio deviations of the at least two terminals.

[0209] It should be noted that the device in this embodiment corresponds to the method applied to the second network device side. The implementation methods in the above embodiments are all applicable to the embodiments of this device and can achieve the same technical effects. The above device provided by the embodiment of the present invention can implement all the method steps implemented in the above method embodiment and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be detailed here.

[0210] Please refer to Figure 11 The embodiment of the present invention further provides a first terminal 1100, including:

[0211] The measuring module 1101 is configured to measure a clipping ratio of an optical signal sent by a second network device to obtain a measured clipping ratio;

[0212] The first sending module is configured to send first information to a first network device, where the first information includes at least one of a measured clipping ratio and a clipping ratio deviation, wherein the clipping ratio deviation is a deviation between the measured clipping ratio and a target clipping ratio.

[0213] Optionally, the first sending module is further used to send first information to the first network device when the clipping ratio deviation is greater than a preset threshold, wherein the first information also includes first indication information for indicating a clipping ratio abnormality or requesting adjustment of the signal sending scheme of the second network device.

[0214] Optionally, the first terminal further includes:

[0215] The first receiving module is used to receive second information sent by the first network device or the second network device, where the second information includes at least one of the following information: second indication information for instructing the terminal to perform clipping ratio measurement, a target clipping ratio, and waveform information of the optical signal sent by the second network device.

[0216] Optionally, the measurement module is further configured to:

[0217] Counting the peak value and standard deviation of the optical signal sent by the second network device and received within the first time window, and estimating a plurality of clipping ratio estimation values ​​based on the waveform, peak value and standard deviation of the optical signal;

[0218] The measured clipping ratio is determined based on the plurality of clipping ratio estimates.

[0219] It should be noted that the device in this embodiment corresponds to the method applied to the first terminal side. The implementation methods in the above embodiments are all applicable to the embodiments of this device and can achieve the same technical effects. The above device provided by the embodiment of the present invention can implement all the method steps implemented in the above method embodiment and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0220] Please refer to Figure 12 , an embodiment of the present invention further provides a network device 1200, comprising: a transceiver 1201 and a processor 1202;

[0221] The processor 1202 is configured to measure a clipping ratio of an optical signal sent by the second network device to obtain a measured clipping ratio;

[0222] The transceiver 1201 is configured to send first information to a first network device, where the first information includes at least one of a measured clipping ratio and a clipping ratio deviation, wherein the clipping ratio deviation is a deviation between the measured clipping ratio and a target clipping ratio.

[0223] Optionally, the transceiver is further used to send first information to the first network device when the clipping ratio deviation is greater than a preset threshold, wherein the first information also includes first indication information for indicating a clipping ratio abnormality or requesting adjustment to the signal sending scheme of the second network device.

[0224] Optionally, the transceiver is also used to receive second information sent by the first network device or the second network device, and the second information includes at least one of the following information: second indication information for instructing the terminal to perform clipping ratio measurement, target clipping ratio, and waveform information of the optical signal sent by the second network device.

[0225] Optionally, the processor is further configured to:

[0226] Counting the peak value and standard deviation of the optical signal sent by the second network device and received within the first time window, and estimating a plurality of clipping ratio estimation values ​​based on the waveform, peak value and standard deviation of the optical signal;

[0227] The measured clipping ratio is determined based on the plurality of clipping ratio estimates.

[0228] It should be noted that the device in this embodiment corresponds to the method applied to the first terminal side. The implementation methods in the above embodiments are all applicable to the embodiments of this device and can achieve the same technical effects. The above device provided by the embodiment of the present invention can implement all the method steps implemented in the above method embodiment and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0229] Please refer to Figure 13 An embodiment of the present invention further provides a first network device 1300, comprising a processor 1301, a memory 1302, and a computer program stored in the memory 1302 and executable on the processor 1301. When the computer program is executed by the processor 1301, the computer program implements the various processes of the above-mentioned signal transmission control method embodiment executed by the first network device, and can achieve the same technical effect. To avoid repetition, it will not be described here.

[0230] Please refer to Figure 14 An embodiment of the present invention further provides a second network device 1400, including a processor 1401, a memory 1402, and a computer program stored in the memory 1402 and executable on the processor 1401. When the computer program is executed by the processor 1401, the computer program implements the various processes of the above-mentioned signal transmission control method embodiment executed by the second network device, and can achieve the same technical effect. To avoid repetition, it will not be described here.

[0231] Please refer to Figure 15 An embodiment of the present invention further provides a first terminal 1500, including a processor 1501, a memory 1502, and a computer program stored in the memory 1502 and executable on the processor 1501. When the computer program is executed by the processor 1501, the computer program implements the various processes of the above-mentioned signal transmission control method embodiment executed by the first terminal, and can achieve the same technical effect. To avoid repetition, it will not be described here.

[0232] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the computer program implements the various processes of the above-mentioned signal transmission control method embodiment and can achieve the same technical effect. To avoid repetition, the details are not described here. The computer-readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0233] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0234] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0235] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are protected by the present invention.

Claims

1. A signal transmission control method, characterized in that: include: The first network device receives first information sent by at least one terminal, where the first information includes at least one of a measured clipping ratio and a clipping ratio deviation, wherein the measured clipping ratio is obtained by the terminal measuring an optical signal sent by the second network device, and the clipping ratio deviation is a deviation between the measured clipping ratio and a target clipping ratio; The first network device sends the first information to the second network device, or adjusts a signal sending scheme of the second network device according to the first information, and sends the adjusted signal sending scheme to the second network device.

2. The method according to claim 1, characterized in that The first information further includes first indication information for indicating that the clipping ratio is abnormal or requesting adjustment of a signal sending scheme of the second network device.

3. The method according to claim 1, characterized in that The target clipping ratio is a clipping ratio expected by the terminal or a clipping ratio configured by the network.

4. The method according to claim 1, wherein The signal transmission scheme includes at least one of the following: a clipping ratio, a modulation type, and a coding efficiency adopted by the optical communication system.

5. The method according to claim 1, wherein Also includes: The first network device sends second information to the terminal and / or the second network device, where the second information includes at least one of the following information: second indication information for instructing the terminal to perform clipping ratio measurement, a target clipping ratio configured by the network, and waveform information of the optical signal sent by the second network device.

6. The method according to claim 1, characterized in that The adjusting the signal sending scheme of the second network device according to the first information includes: Obtaining a first clipping ratio deviation according to the first information sent by the at least one terminal; According to the relationship between the first clipping ratio deviation and the preset threshold, a signal sending scheme of the second network device is adjusted.

7. The method according to claim 6, characterized in that The adjusting the signal sending scheme of the second network device according to the relationship between the first clipping ratio deviation and the preset threshold includes: When the first clipping ratio deviation is greater than a first threshold, adjusting the signal transmission scheme of the second network device includes at least one of the following: increasing the clipping ratio adopted by the optical communication system, reducing the order of the modulation type, and reducing the coding efficiency; When the first clipping ratio deviation is less than a second threshold, adjusting the signal sending scheme of the second network device includes at least one of the following: reducing the clipping ratio used by the optical communication system, increasing the order of the modulation type, and improving coding efficiency.

8. The method according to claim 7, characterized in that The first threshold and the second threshold are predefined thresholds, or thresholds configured by the network, or thresholds set by the terminal.

9. The method according to claim 6, characterized in that The obtaining, according to the first information sent by the at least one terminal, a first clipping ratio deviation includes: In a case where the at least one terminal includes only one terminal, the first clipping ratio deviation is the clipping ratio deviation of the one terminal; In a case where the at least one terminal includes at least two terminals, the first clipping ratio deviation is generated according to the clipping ratio deviations of the at least two terminals.

10. A signal transmission control method, characterized in that: include: The second network device obtains an adjusted signal transmission scheme, wherein the adjusted signal transmission scheme is obtained by adjusting the signal transmission scheme of the second network device according to first information from at least one terminal, the first information including at least one of a measured clipping ratio and a clipping ratio deviation, wherein the measured clipping ratio is obtained by the terminal measuring an optical signal sent by the second network device, and the clipping ratio deviation is a deviation between the measured clipping ratio and a target clipping ratio; The second network device sends a signal according to the adjusted signal sending scheme.

11. The method according to claim 10, characterized in that The second network device obtains the adjusted signal sending scheme, including: The second network device receives the adjusted signal transmission scheme sent by the first network device; or, The second network device receives first information from at least one terminal sent by the first network device, and adjusts a signal sending scheme of the second network device according to the first information to obtain an adjusted signal sending scheme.

12. A signal transmission control method, characterized in that: include: The first terminal measures a clipping ratio of an optical signal sent by the second network device to obtain a measured clipping ratio; The first terminal sends first information to the first network device, where the first information includes at least one of a measured clipping ratio and a clipping ratio deviation, wherein the clipping ratio deviation is a deviation between the measured clipping ratio and a target clipping ratio.

13. The method according to claim 12, characterized in that The first terminal sends first information to the first network device, including: When the clipping ratio deviation is greater than a preset threshold, the first terminal sends first information to the first network device, wherein the first information also includes first indication information for indicating that the clipping ratio is abnormal or requesting adjustment of the signal sending scheme of the second network device.

14. The method according to claim 12, characterized in that Also includes: The first terminal receives second information sent by the first network device or the second network device, where the second information includes at least one of the following information: second indication information for instructing the terminal to perform clipping ratio measurement, target clipping ratio, and waveform information of the optical signal sent by the second network device.

15. The method according to claim 12, characterized in that Measuring, by the first terminal, a clipping ratio of an optical signal sent by the second network device, includes: The first terminal counts the peak value and standard deviation of the optical signal sent by the second network device and received within the first time window, and estimates multiple clipping ratio estimation values ​​based on the waveform, peak value and standard deviation of the optical signal; The first terminal determines the measured clipping ratio according to the multiple clipping ratio estimation values.

16. A first network device, characterized in that: including a transceiver and a processor, wherein The transceiver is configured to receive first information sent by at least one terminal, the first information including at least one of a measured clipping ratio and a clipping ratio deviation, wherein the measured clipping ratio is obtained by measuring an optical signal sent by the terminal to a second network device, and the clipping ratio deviation is a deviation between the measured clipping ratio and a target clipping ratio; The processor is configured to send the first information to the second network device, or adjust a signal sending scheme of the second network device according to the first information, and send the adjusted signal sending scheme to the second network device.

17. A network device, characterized in that: include: A processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, the steps of the method according to any one of claims 1 to 9 are implemented.

18. A terminal, characterized in that: including a transceiver and a processor, wherein The processor is configured to measure a clipping ratio of an optical signal sent by the second network device to obtain a measured clipping ratio; The transceiver is configured to send first information to a first network device, where the first information includes at least one of a measured clipping ratio and a clipping ratio deviation, wherein the clipping ratio deviation is a deviation between the measured clipping ratio and a target clipping ratio.

19. A terminal, characterized in that: include: A processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, the steps of the method according to any one of claims 12 to 15 are implemented.

20. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the method according to any one of claims 1 to 15.

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