Optical communication method and communication device

Abstract

The invention provides an optical communication method and a communication device, and the method provides a scheme which can reduce the influence of multi-path interference (MPI) on a transmission signal in an optical fiber system in a low-cost mode. The method comprises the steps that a transmitting device transmits a transmission signal generated by the transmitting device based on pulse amplitude modulation-N to a receiving device, the intensity distribution of the transmission signal comprises N intensity values, and the N intensity values correspond to N-1 intensity difference values. The strength difference value corresponding to the high strength value in the N strength values is higher than the strength difference value corresponding to the low strength value. The transmission signal can be an optical signal or an electric signal. By changing the intensity distribution rule of the transmission signal, the intensity difference value corresponding to the high intensity value is higher than the intensity difference value corresponding to the low intensity value, so that the tolerance of the transmission signal to the MPI noise can be effectively improved, and the influence of the MPI in the optical fiber system on the transmission signal can be further reduced in a low-cost manner.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to an optical communication method and a communication device. Background Art

[0002] Multipath interference (MPI) will have a negative impact on the optical signal transmitted in the optical fiber system and reduce the signal quality of the optical signal. MPI in the optical fiber system mainly comes from the dirty optical fiber end faces in the optical fiber system. Specifically, at least one new transmission path will be formed between any two dirty optical fiber end faces in the optical fiber system. The optical signal transmitted through this transmission path is a kind of noise for the signal transmitted along the main path (direct transmission propagation), which will reduce the signal quality of the optical signal transmitted along the main path.

[0003] In order to reduce the impact of MPI in the optical fiber system on the transmission signal, the optical-time domain reflectometer (OTDR) technology is currently mainly used to measure the position of the dirty optical fiber end face, and clean it by manual means, so as to reduce the impact of MPI in the optical fiber system on the transmission signal. However, the above method will lead to high labor costs. Therefore, how to reduce the impact of MPI in the optical fiber system on the transmission signal in a low-cost manner is a technical problem that needs to be solved urgently. Summary of the invention

[0004] The present application provides an optical communication method and a communication device, which can reduce the impact of MPI in an optical fiber system on transmission signals in a low-cost manner.

[0005] In a first aspect, an optical communication method is provided, comprising: generating a first signal based on pulse amplitude modulation (PAM-N), the intensity distribution of the first signal comprising N intensity values, the N intensity values ​​corresponding to N-1 intensity differences, the N-1 intensity differences comprising an i-th intensity difference value and a p-th intensity difference value, the i-th intensity difference value being the difference between an i+1-th intensity value and an i-th intensity value among the N intensity values, the p-th intensity difference value being the difference between a p+1-th intensity value and a p-th intensity value among the N intensity values, i and p being positive integers less than or equal to N-1, i being less than p, N being a positive integer greater than 2, and the i-th intensity difference value being less than the p-th intensity difference; and transmitting the first signal.

[0006] Specifically, the execution subject of the solution described in the first aspect may be a sending device, or a chip or integrated circuit used to execute the function of the sending device, etc., which is not limited. The following description takes the sending device as an example.

[0007] It can be understood that the first signal can be an optical signal or an electrical signal. When the first signal is an optical signal, transmitting the first signal means sending the optical signal. When the first signal is an electrical signal, transmitting the first signal means sending an optical signal obtained based on the electrical signal.

[0008] By changing the intensity distribution law of the first signal, the intensity difference corresponding to the high intensity value in the intensity distribution of the first signal is made higher than the intensity difference corresponding to the low intensity value. This can effectively improve the tolerance of the first signal to MPI noise, thereby reducing the impact of MPI in the optical fiber system on the transmission signal in a low-cost manner.

[0009] In a possible implementation manner, the first signal is an electrical signal, and the method further includes: generating an optical signal according to the first signal; and transmitting the optical signal through an optical fiber link.

[0010] When the first signal is an electrical signal, the transmitting device converts the electrical signal satisfying the above rule into an optical signal through an optoelectronic modulator, and transmits the optical signal to the receiving device through an optical fiber link. In this way, the tolerance of the optical signal obtained based on the electrical signal to the MPI noise in the optical fiber system can be improved, thereby reducing the impact of the MPI in the optical fiber system on the transmission signal in a low-cost manner.

[0011] In a possible implementation manner, the first signal is an optical signal, and transmitting the first signal includes: transmitting the first signal through an optical fiber link.

[0012] When the first signal is an optical signal, the intensity distribution of the optical signal satisfies the above rule, which can improve the tolerance of the optical signal to the MPI noise in the optical fiber system, and thus reduce the impact of the MPI in the optical fiber system on the transmission signal in a low-cost manner.

[0013] A possible implementation method, which generates a first signal based on PAM-N, includes: generating an electrical signal based on PAM-N, the level distribution of the electrical signal includes N level values, the N level values ​​correspond to N-1 level differences, the N-1 level differences include an i-th level difference and a p-th level difference, the i-th level difference is the difference between an i+1-th level value and an i-th level value among the N level values, the p-th level difference is the difference between a p+1-th level value and a p-th level value among the N level values, and the i-th level difference is less than the p-th level difference; generating the first signal according to the electrical signal; wherein each strength value among the N strength values ​​corresponds to each level value among the N level values, and each strength difference value among the N-1 strength differences corresponds to each level difference value among the N-1 level differences.

[0014] When the transmitting device generates an electrical signal that satisfies the above rules based on PAM-N, the transmitting device can convert the electrical signal into an optical signal through an optoelectronic modulator (such as a Mach-Zehnder modulator (MZM)), and the optical power value distribution of the optical signal also satisfies the above rules. In this way, the tolerance of the optical signal to the MPI noise in the optical fiber system can be improved.

[0015] A possible implementation method, which generates a first signal based on PAM-N, includes: generating an electrical signal based on PAM-N, the level distribution of the electrical signal includes N level values, the N level values ​​correspond to N-1 level differences, the N-1 level differences include an i-th level difference and a p-th level difference, the i-th level difference is the difference between an i+1-th level value and an i-th level value among the N level values, the p-th level difference is the difference between a p+1-th level value and a p-th level value among the N level values, and the i-th level difference is equal to the p-th level difference; and converting the electrical signal into a first signal through a Mach-Zehnder modulator in a nonlinear modulation mode.

[0016] When the level value distribution of the above-mentioned electrical signal does not satisfy the above-mentioned law, the sending device can convert the above-mentioned electrical signal into an optical signal with the above-mentioned distribution law by adopting an MZM in a nonlinear modulation mode, and the optical power value distribution of the optical signal satisfies the above-mentioned law. In this way, this can improve the tolerance of the optical signal to the MPI noise in the optical fiber system.

[0017] In a possible implementation, N intensity values ​​correspond to N-1 intensity thresholds, the N-1 intensity thresholds include the i-th intensity threshold and the p-th intensity threshold, the i-th intensity threshold is greater than the i-th intensity value, the i-th intensity threshold is less than the i+1-th intensity value, the p-th intensity threshold is greater than the p-th intensity value, and the p-th intensity threshold is less than the p+1-th intensity value; the i-th intensity difference is the sum of the difference between the i+1-th intensity value and the i-th intensity threshold and the difference between the i-th intensity threshold and the i-th intensity value; the p-th intensity difference is the sum of the difference between the p+1-th intensity value and the p-th intensity threshold and the difference between the p-th intensity threshold and the p-th intensity value.

[0018] By setting N-1 strength thresholds, it is beneficial for the receiving device to better distinguish N strength values.

[0019] In a possible implementation, the difference between the i+1th intensity value and the i-th intensity threshold is greater than the difference between the i-th intensity threshold and the i-th intensity value, and the i+1th intensity value is greater than the i-th intensity value; the difference between the p+1th intensity value and the p-th intensity threshold is greater than the difference between the p-th intensity threshold and the p-th intensity value, and the p+1th intensity value is greater than the p-th intensity value.

[0020] By establishing a positive correlation between the difference between each intensity value and the corresponding intensity threshold and the intensity value, the distribution of N intensity values ​​can satisfy the above-mentioned rule, thereby avoiding the receiving device from misjudging the intensity value, and thereby improving the tolerance of the first signal to MPI noise. Specifically, the MPI in the optical fiber system will form MPI noise for each intensity value. Among them, the characteristic of MPI noise is that the larger the intensity value, the larger the MPI noise amplitude. Therefore, when the intensity value is larger, the corresponding intensity difference is also larger. When the MPI noise is superimposed, due to the larger intensity difference, the receiving device can avoid misjudging two adjacent intensity values. In this way, the tolerance of the first signal to MPI noise can be improved.

[0021] In a possible implementation method, the ratio of the difference between the i+1th intensity value and the i-th intensity threshold and the square root of the i+1th intensity value is a first value, and the ratio of the difference between the i-th intensity value and the i-th intensity threshold and the square root of the i-th intensity value is a first value; the ratio of the difference between the p+1th intensity value and the p-th intensity threshold and the square root of the p+1th intensity value is a first value, and the ratio of the difference between the p-th intensity value and the p-th intensity threshold and the square root of the p-th intensity value is a first value.

[0022] By making the ratio between the difference between each strength value and the corresponding strength threshold and the square root of the strength value constant, the distribution of the N strength values ​​can satisfy the above rule, thereby avoiding misjudgment of the strength value by the receiving device.

[0023] Specifically, the MPI in the optical fiber system will generate MPI noise for each intensity value. The characteristic of the MPI noise amplitude is that the larger the intensity value, the larger the MPI noise. Therefore, when the intensity value is larger, the corresponding intensity difference is also larger. When the MPI noise is superimposed, due to the larger intensity difference, the receiving device can avoid misjudging two adjacent intensity values, so that the tolerance of the first signal to MPI noise can be improved.

[0024] In a second aspect, an optical communication method is provided, including: receiving an optical signal sent by a sending device through an optical fiber link, the optical signal being generated by the sending device based on PAM-N, the optical power distribution of the optical signal including N optical power values, the N optical power values ​​corresponding to N-1 optical power difference values, the N-1 optical power difference values ​​including the ith optical power difference value and the pth optical power difference value, the ith optical power difference value being the difference between the i+1th optical power value and the ith optical power value among the N optical power values, the pth optical power difference value being the difference between the p+1th optical power value and the pth optical power value among the N optical power values, i and p being positive integers less than or equal to N-1, i being less than p, N being a positive integer greater than 2, and the ith optical power difference value being less than the pth optical power difference value; and processing the optical signal.

[0025] The execution subject of the technical solution described in the second aspect may be a receiving device, or a chip or integrated circuit for executing the function of the receiving device, etc., which is not limited. The following description takes a sending device as an example.

[0026] A possible implementation method, the processing of the optical signal includes: determining N-1 optical power thresholds corresponding to N optical power values, the N-1 optical power thresholds include the i-th optical power threshold and the p-th optical power threshold, the i-th optical power threshold is greater than the i-th optical power value, the i-th optical power threshold is less than the i+1-th optical power value, the p-th optical power threshold is greater than the p-th optical power value, and the p-th optical power threshold is less than the p+1-th optical power value; the i-th optical power difference is the sum of the difference between the i+1-th optical power value and the i-th optical power threshold and the difference between the i-th optical power threshold and the i-th optical power value; the p-th optical power difference is the sum of the difference between the p+1-th optical power value and the p-th optical power threshold and the difference between the p-th optical power threshold and the p-th optical power value; and processing the optical signal according to the N-1 optical power thresholds.

[0027] A possible implementation method is that the difference between the i+1th optical power value and the i-th optical power threshold is greater than the difference between the i-th optical power threshold and the i-th optical power value, and the i+1th optical power value is greater than the i-th optical power value; the difference between the p+1th optical power value and the p-th optical power threshold is greater than the difference between the p-th optical power threshold and the p-th optical power value, and the p+1th optical power value is greater than the p-th optical power value.

[0028] In a possible implementation method, the ratio of the difference between the i+1th optical power value and the i-th optical power threshold and the square root of the i+1th optical power value is a first value, and the ratio of the difference between the i-th optical power value and the i-th optical power threshold and the square root of the i-th optical power value is a first value; the ratio of the difference between the p+1th optical power value and the p-th optical power threshold and the square root of the p+1th optical power value is a first value, and the ratio of the difference between the p-th optical power value and the p-th optical power threshold and the square root of the p-th optical power value is a first value.

[0029] According to a third aspect, a communication device is provided, which may be a sending device, or a device in the sending device (for example, a chip, or a chip system, or a circuit), or a device that can be used in combination with the sending device.

[0030] In one possible implementation, the communication device includes a module or unit corresponding to each of the methods / operations / steps / actions described in any one of the first aspects. The module or unit may be a hardware circuit, software, or a combination of a hardware circuit and software.

[0031] In a fourth aspect, a communication device is provided, which may be a receiving device, or a device in the receiving device (for example, a chip, or a chip system, or a circuit), or a device that can be used in combination with the receiving device.

[0032] In one possible implementation, the communication device may include a module or unit corresponding to each of the methods / operations / steps / actions described in the second aspect. The module or unit may be a hardware circuit, software, or a combination of hardware circuit and software.

[0033] In a fifth aspect, a communication device is provided, comprising a processor, wherein the processor is used to enable the communication device to execute the method described in the first aspect and any possible method described in the first aspect by executing a computer program or instruction, or by a logic circuit; or to enable the communication device to execute the method described in the second aspect and any possible method described in the second aspect.

[0034] In a possible implementation, the communication device further includes a memory for storing the computer program or instruction.

[0035] In a possible implementation manner, the communication device further includes a communication interface, which is used to input and / or output signals.

[0036] In a sixth aspect, a communication device is provided, comprising a logic circuit and an input / output interface, the input / output interface being used to input and / or output signals, the logic circuit being used to execute the method described in the first aspect and any possible embodiment of the first aspect; or, the logic circuit being used to execute the method described in the second aspect and any possible embodiment of the second aspect.

[0037] In the seventh aspect, a computer-readable storage medium is provided, on which a computer program or instruction is stored. When the computer program or the instruction is run on a computer, the method described in the first aspect and any possibility of the first aspect is executed; or, the method described in the second aspect and any possibility of the second aspect is executed.

[0038] In an eighth aspect, a computer program product is provided, comprising instructions, which, when executed on a computer, cause the method described in the first aspect and any possible method of the first aspect to be executed; or, cause the method described in the second aspect and any possible method of the second aspect to be executed.

[0039] The description of the beneficial effects of the second to eighth aspects may correspond to the description of the beneficial effects of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the effect of MPI in a fiber optic system on the transmission signal.

[0041] Figure 2 It is a schematic diagram of the interaction process of the optical communication method of an embodiment of the present application.

[0042] Figure 3 It is a schematic diagram of the intensity distribution of the signal 1 according to an embodiment of the present application.

[0043] Figure 4 It is a schematic diagram of the relationship between the modulation mode of the MZM and the electrical signal 1 according to an embodiment of the present application.

[0044] Figure 5 It is a schematic block diagram of a communication device 500 according to an embodiment of the present application.

[0045] Figure 6 It is a schematic block diagram of a communication device 600 according to an embodiment of the present application. DETAILED DESCRIPTION

[0046] In order to facilitate understanding of the embodiments of the present application, the following points are first explained.

[0047] 1. In this application, unless otherwise specified, "plurality" means two or more.

[0048] 2. In each embodiment of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form a new embodiment according to their internal logical relationships.

[0049] 3. The various digital numbers involved in this application are only used for the convenience of description and are not used to limit the scope of protection of this application. The size of the serial numbers involved in this application does not mean the order of execution. The execution order of each process should be determined by its function and internal logic. For example, the terms "first", "second", "third", "fourth" and other various terminology labels (if any) in the specification and claims and drawings of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. Among them, the data used in this way can be interchangeable where appropriate, so that the embodiments described here can be implemented in an order other than what is illustrated or described here.

[0050] At the same time, any embodiment or design described in the present application as "exemplary" or "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete manner for ease of understanding.

[0051] 4. The terms "comprise", "include", "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product or apparatus.

[0052] 5. The term "storage" or "saving" as used in this application may refer to saving in one or more memories. The one or more memories may be provided separately or integrated in an encoder or decoder, a processor, or a communication device. The one or more memories may also be partially provided separately and partially integrated in a decoder, a processor, or a communication device. The type of memory may be any form of storage medium, which is not limited thereto.

[0053] 6. The dotted arrows or boxes in the schematic diagrams of the drawings in the specification of this application represent optional steps or optional modules.

[0054] 7. In this application, unless otherwise specified, “ / ” indicates that the objects associated with each other are in an “or” relationship. For example, A / B can represent A or B. “And / or” in this application is only a description of the association relationship between the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.

[0055] First, a brief description of the terms involved in the embodiments of the present application is given.

[0056] 1. Pulse Amplitude Modulation (PAM)-4

[0057] PAM-4 is a modulation technology that uses four levels for signal transmission. Each symbol period of a PAM-4 signal can represent 2 bits of logical information (such as 00, 01, 10, 11).

[0058] Compared with non-return-to-zero (NRZ) modulation technology, the transmission capacity of PAM-4 signals is twice that of NRZ signals, which can significantly improve the transmission efficiency of signals.

[0059] 2. MPI in Fiber Optic Systems

[0060] With the continuous development of communication technology, fiber optic systems need to use a large number of fiber optic connectors to connect fiber optic cables for long-distance optical signal transmission. Over time, the fiber end faces of fiber optic connectors will inevitably be contaminated by pollutants. Among them, at least one new transmission path will be formed between any two dirty fiber end faces. As the number of contaminated fiber end faces continues to accumulate, a large number of new transmission paths will be formed inside the fiber optic system. The optical signal transmitted along the new transmission path is a kind of noise for the optical signal transmitted along the main path (direct transmission without reflection), which will affect the signal quality of the optical signal. For the impact of MPI in the fiber optic system on the transmission signal, please refer to Figure 1 .

[0061] Figure 1 This is a schematic diagram of the effect of MPI in an optical fiber system on the transmission signal. Figure 1 As shown, fiber end face 1 and fiber end face 2 are dirty fiber end faces. When optical signal a is transmitted to fiber end face 1, optical signal a cannot directly pass through fiber end face 1, but is reflected by fiber end face 1, reaches fiber end face 2, and then is reflected by fiber end face 2, and finally is transmitted through fiber end face 1. From the above description, it can be seen that optical signal a can be transmitted through end face 1 after being reflected twice by fiber end face 1 and fiber end face 2. When the number of dirty fiber end faces in the optical fiber system increases, the number of additional transmission paths (i.e., new transmission paths) of the optical signal increases, which will cause the signal quality of the optical signal transmitted along the main path to deteriorate.

[0062] Since PAM-4 signals have higher transmission efficiency, optical signals will also use PAM-4 modulation technology. Since PAM-4 signals are more sensitive to noise, it is necessary to control the MPI in the optical fiber system to reduce the interference of MPI on PAM-4 signals.

[0063] As described in the background technology, currently, the OTDR technology is mainly used to measure the position of the dirty optical fiber end face, and clean it by manual means to reduce the MPI in the optical fiber system. However, the above method will lead to high labor costs. Therefore, a method is needed to reduce the influence of MPI in the optical fiber system on the transmission signal in a low-cost manner.

[0064] In view of this, the present application provides an optical communication method and a communication device, which can reduce the impact of MPI in an optical fiber system on transmission signals in a low-cost manner.

[0065] The optical communication method according to the embodiment of the present application is described below with reference to the accompanying drawings.

[0066] Figure 2 It is a schematic diagram of the interaction process of the optical communication method of an embodiment of the present application. Figure 2The method shown can be executed by a transmitting device and a receiving device, or by a module and / or device (for example, a chip or an integrated circuit, etc.) with corresponding functions installed in the transmitting device and the receiving device, without limitation. The following description takes the transmitting device and the receiving device as an example. Figure 2 As shown, the method includes:

[0067] S201. The sending device generates signal 1 based on PAM-N. The intensity distribution of signal 1 includes N intensity values. The N intensity values ​​correspond to N-1 intensity differences. The N-1 intensity differences include the ith intensity difference value and the pth intensity difference value. The ith intensity difference value is the difference between the i+1th intensity value and the ith intensity value among the N intensity values. The pth intensity difference value is the difference between the p+1th intensity value and the pth intensity value among the N intensity values. i is less than p, and the ith intensity difference value is less than the pth intensity difference value.

[0068] Specifically, N is a positive integer greater than 2, and i and p are both positive integers less than or equal to N. Exemplarily, N can be 3, 4, and 8. When N is 3, the transmitting device generates signal 1 based on PAM-3, the intensity distribution of signal 1 includes 3 intensity values, and i and p are both positive integers less than or equal to 3; when N is 4, the transmitting device generates signal 1 based on PAM-4, the intensity distribution of signal 1 includes 4 intensity values, and i and p are both positive integers less than or equal to 4; when N is 8, the transmitting device generates signal 1 based on PAM-8, the intensity distribution of signal 1 includes 8 intensity values, and i and p are both positive integers less than or equal to 8. For ease of description, the following description takes N as 4 as an example. For a description of the relationship between the intensity value and the intensity difference, see Figure 3 .

[0069] Figure 3 Schematic diagram of the intensity distribution of signal 1 in the embodiment of the present application. Figure 3 As shown, taking N=4 as an example, the intensity distribution of signal 1 includes four intensity values, namely I 1 ,I 2 ,I 3 and I 4 , I 1 <I 2 <I 3 <I 4 The above four intensity values ​​correspond to three intensity differences, namely: Δ1, Δ2 and Δ3. Δ1=I 2 -I 1 , Δ2=I 3 -I 2 , Δ3=I 4 -I 3 . Among them, Δ1<Δ2<Δ3. Since Δ1<Δ2<Δ3, the distribution of the above four intensity values ​​is not uniform. Specifically, I1 with I 2 The interval between them is less than I 2 with I 3 The interval between 2 with I 3 The interval between them is less than I 3 with I 4 The interval between.

[0070] Specifically, each intensity value of signal 1 will be affected by a certain amount of MPI noise. The amplitude of MPI noise has a certain correlation with the intensity value. For example, the amplitude of MPI noise corresponding to a high intensity value is higher than the amplitude of MPI noise corresponding to a low intensity value. By making the intensity difference corresponding to each of the N intensity values ​​in the intensity distribution of signal 1 different, the tolerance of signal 1 to MPI noise can be effectively improved.

[0071] Specifically, the MPI in the optical fiber system will form MPI noise for each intensity value. Among them, the characteristic of MPI noise is that the larger the intensity value, the larger the MPI noise amplitude. For example, the i+1th intensity value is higher than the i-th intensity value, and the MPI noise amplitude corresponding to the i+1th intensity value will also be higher than the MPI noise amplitude corresponding to the i-th intensity value. Since the intensity difference between the i+1th intensity value and the i-th intensity value is large, when the two intensity values ​​are each superimposed with MPI noise, the receiving device can correctly judge the i+1th intensity value and the i-th intensity value because of the large intensity difference between the i+1th intensity value and the i-th intensity value. In this way, the tolerance of the first signal to MPI noise can be improved.

[0072] In the above description, in a possible implementation, signal 1 may be an optical signal 1 or an electrical signal 1 .

[0073] In one example, signal 1 is optical signal 1, and the optical power value distribution of optical signal 1 satisfies the above rule, that is, the optical power distribution of optical signal 1 includes N optical power values, and the N optical power values ​​correspond to N-1 optical power difference values. The i-th optical power difference value is the difference between the i+1-th optical power value and the i-th optical power value among the N optical power values, and the p-th optical power difference value is the difference between the p+1-th optical power value and the p-th optical power value among the N optical power values. The i-th optical power difference value is less than the p-th optical power difference value. In this way, the tolerance of optical signal 1 to MPI noise in the optical fiber system can be improved. Among them, the above optical power value can be the above intensity value, and the above optical power difference value can be the above intensity difference value.

[0074] In another example, signal 1 is an electrical signal 1, and the level value distribution of the electrical signal 1 satisfies the above rule, that is, the level distribution of the electrical signal 1 includes N level values, the N level values ​​correspond to N-1 level differences, the i-th level difference is the difference between the i+1-th level value and the i-th level value among the N level values, the p-th level difference is the difference between the p+1-th level value and the p-th level value among the N level values, and the i-th level difference is less than the p-th level difference. Among them, the above-mentioned level value can be the above-mentioned intensity value, and the above-mentioned level difference can be the above-mentioned intensity difference. Among them, the sending device can adjust the level value of the output electrical signal 1 through the driving chip so that the level value distribution of the electrical signal 1 shows the above rule.

[0075] Specifically, after the transmitting device generates an electrical signal 1 that satisfies the above rule based on PAM-N, the transmitting device converts the electrical signal 1 into an optical signal 1 through an optoelectronic converter (such as MZM), and the optical power value distribution of the optical signal 1 obtained based on the electrical signal 1 also satisfies the above rule. In this way, the tolerance of the optical signal 1 to the MPI noise in the optical fiber system can be improved.

[0076] A possible implementation method is when the level distribution of the electrical signal 1 does not satisfy the above rule, that is: the level distribution of the electrical signal 1 includes N level values, the N level values ​​correspond to N-1 level differences, the i-th level difference is the difference between the i+1-th level value and the i-th level value among the N level values, the p-th level difference is the difference between the p+1-th level value and the p-th level value among the N level values, and the i-th level difference is equal to the p-th level difference. The sending device can set the MZM to a nonlinear modulation mode, and use the MZM in the nonlinear modulation mode to convert the electrical signal 1 into the optical signal 1. The optical power distribution of the optical signal 1 obtained based on the electrical signal 1 can also satisfy the above rule. In this way, the tolerance of the optical signal 1 to the MPI noise in the optical fiber system can be improved. For details, please refer to Figure 4 .

[0077] Figure 4 Schematic diagram of the relationship between the modulation mode of the MZM and the electrical signal 1 in the embodiment of the present application. Figure 4 As shown in (a), when MZM adopts linear modulation mode, the left figure shows that the four level values ​​of electrical signal 1 are evenly distributed, the middle figure shows that the three eyes in the eye diagram corresponding to electrical signal 1 have the same eye width, and the right figure shows that after superimposing MPI noise, there is overlap between the third and fourth optical power values ​​in optical signal 1 obtained based on electrical signal 1, and the receiving device cannot accurately determine the third and fourth optical power values. Figure 4As shown in (b), when MZM adopts nonlinear modulation mode, it can be seen from the left figure that the four level values ​​are unevenly distributed, and from the middle figure, it can be seen that the eye widths of the three eyes in the eye diagram corresponding to the electrical signal 1 are different. It can be seen from the right figure that after superimposing the MPI noise, there is no overlap between the third optical power value and the fourth optical power value in the optical signal 1 obtained based on the electrical signal 1, and the receiving device can accurately judge the third optical power value and the fourth optical power value.

[0078] In summary, when signal 1 is optical signal 1, the present application can improve the tolerance of optical signal 1 to MPI noise in the optical fiber system; when signal 1 is electrical signal 1, the present application can improve the tolerance of optical signal 1 obtained based on the conversion of electrical signal 1 to MPI noise in the optical fiber system. When the tolerance of optical signal 1 to MPI noise is improved, the present application supports cleaning the dirty optical fiber end face without manual means.

[0079] S202, the sending device transmits signal 1.

[0080] When signal 1 is optical signal 1, the sending device sends signal 1 to the receiving device through the optical fiber link. When signal 1 is electrical signal 1, the sending device first converts electrical signal 1 into optical signal 1 through an optoelectronic modulator, and sends optical signal 1 to the receiving device through the optical fiber link.

[0081] S203: The receiving device processes signal 1.

[0082] Specifically, the receiving device processes signal 1 and obtains information in signal 1.

[0083] In summary, by changing the intensity distribution law of signal 1, the intensity difference corresponding to the high intensity value among the N intensity values ​​of signal 1 is made higher than the intensity difference corresponding to the low intensity value among the N intensity values. This can effectively improve the tolerance of signal 1 to MPI noise, and thus reduce the impact of MPI in the optical fiber system on the transmission signal in a low-cost manner.

[0084] Specifically, the MPI in the optical fiber system will form MPI noise for each intensity value. Among them, the characteristic of the MPI noise amplitude is that the larger the intensity value, the larger the MPI noise. Therefore, when the intensity value is larger, the corresponding intensity difference is also larger. When the MPI noise is superimposed, due to the larger intensity difference, the receiving device can avoid misjudging two adjacent intensity values. In this way, the tolerance of signal 1 to MPI noise can be improved. When the tolerance of signal 1 to MPI noise is improved, the present application supports the cleaning of the dirty optical fiber end face without manual means.

[0085] In one embodiment, N intensity values ​​correspond to N-1 intensity thresholds, the N-1 intensity thresholds include the i-th intensity threshold and the p-th intensity threshold, the i-th intensity threshold is greater than the i-th intensity value, the i-th intensity threshold is less than the i+1-th intensity value, the p-th intensity threshold is greater than the p-th intensity value, and the p-th intensity threshold is less than the p+1-th intensity value; the i-th intensity difference is the sum of the difference between the i+1-th intensity value and the i-th intensity threshold and the difference between the i-th intensity threshold and the i-th intensity value; the p-th intensity difference is the sum of the difference between the p+1-th intensity value and the p-th intensity threshold and the difference between the p-th intensity threshold and the p-th intensity value.

[0086] For example, by Figure 3 It can be seen that I 1 and I 2 There is an intensity threshold I a , I 2 and I 3 There is an intensity threshold I b , I 3 and I 4 There is an intensity threshold I c Δ1=(I 2 -I a )+(I a -I 1 ), Δ2=(I 3 -I b )+(I b -I 2 ), Δ3=(I 4 -I c )+(I c -I 3 ).

[0087] Specifically, by setting N-1 strength thresholds, it is beneficial for the receiving device to better distinguish N strength values.

[0088] It should be noted that the transmitting device and the receiving device can communicate between N-1 strength thresholds, which is conducive to the receiving device to better judge each strength value. Alternatively, the N-1 strength thresholds can be pre-configured in the receiving device, which can save signaling overhead between the transmitting device and the receiving device.

[0089] In one embodiment, the difference between the i+1th intensity value and the i-th intensity threshold is greater than the difference between the i-th intensity threshold and the i-th intensity value, and the i+1th intensity value is greater than the i-th intensity value; the difference between the p+1th intensity value and the p-th intensity threshold is greater than the difference between the p-th intensity threshold and the p-th intensity value, and the p+1th intensity value is greater than the p-th intensity value.

[0090] For example, by Figure 3It can be seen that I 2 Greater than I 1 , (I 2 -I a ) is greater than (I a -I 1 );I 3 Greater than I 2 , (I 3 -I b ) is greater than (I b -I 2 );I 4 Greater than I 3 , (I 4 -Ic) is greater than (I c -I 3 ). Among them, (I 2 -I a )=(I b -I 2 ), (I 3 -I b )=(I c -I 3 ).

[0091] Specifically, by establishing a positive correlation between the difference between each intensity value and the corresponding intensity threshold and the intensity value, the distribution of N intensity values ​​can satisfy the above-mentioned rule, thereby avoiding the receiving device from misjudging the intensity value. Specifically, the MPI in the optical fiber system will form MPI noise for each intensity value. Among them, the characteristic of MPI noise is that the larger the intensity value, the larger the MPI noise amplitude. Therefore, the larger the value of the i+1th intensity value, the larger the corresponding intensity difference. When the MPI noise is superimposed, due to the larger intensity difference, the receiving device can avoid misjudging the i-th intensity value and the i+1-th intensity value. In this way, the tolerance of the first signal to MPI noise can be improved.

[0092] Specifically, I 2 Greater than I 1 , (I 2 -I a ) is greater than (I a -I 1 ), when superimposed with MPI noise, the receiving device can more accurately judge I 2 and I 1 ;I 3 Greater than I 2 , (I 3 -I b ) is greater than (I b -I 2 ), when superimposed with MPI noise, the receiving device can more accurately judge I 3 and I 2;I 4 Greater than I 3 , (I 4 -I c ) is greater than (I c -I 3 ), when superimposed with MPI noise, the receiving device can more accurately judge I 4 and I 3 .

[0093] In one embodiment, the ratio of the difference between the i+1th intensity value and the i-th intensity threshold and the square root of the i+1th intensity value is a first value, and the ratio of the difference between the i-th intensity value and the i-th intensity threshold and the square root of the i-th intensity value is a first value; the ratio of the difference between the p+1th intensity value and the p-th intensity threshold and the square root of the p+1th intensity value is a first value, and the ratio of the difference between the p-th intensity value and the p-th intensity threshold and the square root of the p-th intensity value is a first value.

[0094] For example, by Figure 3 It can be seen that (I a -I 1 ) / I 1 =(I 2 -I a ) / I 2 =(I 3 -I b ) / I 3 =(I b -I 2 ) / I 2 =(I 4 -I c ) / I 3 =(I c -I 3 ) / I 3 =k (the first value), k is a constant.

[0095] Specifically, by making the ratio between the difference between each strength value and the corresponding strength threshold and the square root of the strength value constant, the distribution of the N strength values ​​can satisfy the above rule, thereby preventing the receiving device from misjudging the strength value.

[0096] Specifically, the MPI in the optical fiber system will generate MPI noise for each intensity value. The characteristic of the MPI noise amplitude is that the larger the intensity value, the larger the MPI noise. Therefore, when the intensity value is larger, the corresponding intensity difference is also larger. When the MPI noise is superimposed, due to the larger intensity difference, the receiving device can avoid misjudging two adjacent intensity values, so that the tolerance of the first signal to MPI noise can be improved.

[0097] In summary, the present application supports changing the intensity distribution law of signal 1 so that the intensity difference corresponding to the high intensity value is higher than the intensity difference corresponding to the low intensity value. This allows the receiving device to more accurately judge each intensity value due to the larger intensity difference after the MPI noise is superimposed on each intensity value. Accordingly, when the tolerance of signal 1 to MPI noise is improved, the present application supports the elimination of the need to manually clean the dirty optical fiber end face, thereby saving costs.

[0098] The method embodiments of the present application are described above, and the corresponding device embodiments are introduced below.

[0099] Figure 5 5 is a schematic block diagram of a communication device 500 of an embodiment of the present application. The communication device 500 includes a processor 501, a memory 502 (optional) and a communication interface 503, and the processor 501, the memory 502 and the communication interface 503 are interconnected via a bus 504. The communication device 500 can be a sending device or a receiving device.

[0100] Specifically, the memory 502 includes but is not limited to random access memory (RAM), read-only memory (ROM), erasable programmable read only memory (EPROM), or portable read only memory (CD-ROM), and the memory 502 is used for related instructions and data.

[0101] The processor 501 may be one or more central processing units (CPUs). When the processor 501 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

[0102] Exemplarily, when the communication apparatus 500 is a sending device, the processor 501 is used to read the program code stored in the memory 502 and perform the following operations: generate signal 1 based on PAM-N; and send signal 1.

[0103] Exemplarily, when the communication apparatus 500 is a receiving device, the processor 501 is used to read the program code stored in the memory 502 and perform the following operations: receiving the optical signal 1; and processing the optical signal 1.

[0104] It should be noted that Figure 5 The implementation of each operation in can refer to Figure 2 to Figure 4The corresponding description of the method embodiment shown in .

[0105] Figure 6 6 is a schematic block diagram of a communication device 600 of an embodiment of the present application. The communication device 600 is applied to a sending device, and can also be applied to a receiving device, and can be used to implement the method involved in the above method embodiment. The communication device 600 includes a transceiver unit 601 and a processing unit 602. The transceiver unit 601 and the processing unit 602 are introduced below.

[0106] Exemplarily, when the communication apparatus 600 is a transmitting device, the processing unit 602 is used to generate a signal 1 based on PAM-N; and the transceiver unit 601 is used to send an optical signal 1 to a receiving device.

[0107] Exemplarily, when the communication apparatus 600 is a receiving device, the transceiver unit 601 is used to receive the optical signal 1 ; and the processing unit 702 is used to process the optical signal 1 .

[0108] It should be noted that Figure 6 The implementation of each operation in the above-mentioned embodiments can be described in accordance with the method shown in the above-mentioned embodiments, which is only understood as an example.

[0109] An embodiment of the present application also provides a chip, including a processor, for calling and executing instructions stored in a memory from the memory, so that a communication device equipped with the chip executes the methods in the above examples.

[0110] An embodiment of the present application also provides another chip, including: an input interface, an output interface, a processor and a memory, wherein the input interface, the output interface, the processor and the memory are connected via an internal connection path, and the processor is used to execute the code in the memory. When the code is executed, the processor is used to execute the methods in the above examples.

[0111] An embodiment of the present application also provides a processor, which is coupled to a memory and is used to execute the methods and functions involving a satellite or a user equipment in any of the above embodiments.

[0112] In another embodiment of the present application, a computer program product is provided. When the computer program product is run on a computer, the method of the above embodiment is implemented.

[0113] In another embodiment of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a computer, the method described in the above embodiment is implemented.

[0114] In the description of the embodiments of the present application, unless otherwise specified, "multiple" refers to two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can be represented by: a, b, c, ab, ac, bc, or abc, wherein a, b, c can be single or multiple. In addition, in order to facilitate the clear description of the technical scheme of the embodiments of the present application, in the embodiments of the present application, the words "first", "second" and the like are used to distinguish the same items or similar items with substantially the same functions and effects. Those skilled in the art can understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like do not limit necessarily different. At the same time, in the embodiments of the present application, the words "exemplary" or "for example" are used to represent examples, illustrations or descriptions.

[0115] Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete manner for ease of understanding.

[0116] In the description of the embodiments of the present application, unless otherwise specified, " / " indicates that the objects associated before and after are in an "or" relationship, for example, A / B can represent A or B; "and / or" in the present application is merely a description of the association relationship between associated objects, indicating that three relationships may exist, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.

[0117] It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention.

[0118] Therefore, the phrases "in one embodiment" or "in an embodiment" appearing in various places throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in one or more embodiments in any suitable manner. In various embodiments of the present invention, the sequence numbers of the above-mentioned processes do 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.

[0119] It will be understood that the “embodiment” mentioned throughout the specification means that a particular feature, structure or characteristic related to the embodiment is included in at least one embodiment of the present application.

[0120] Therefore, the various embodiments in the entire specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It is understood that in various embodiments of the present application, the size of the sequence number of each process does not mean the order of execution, and 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 embodiment of the present application.

[0121] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0122] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0123] Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, which may be electrical, mechanical or other forms.

[0124] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, each functional unit in each embodiment of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0125] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program codes.

[0126] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An optical communication method, characterized in that: include: Generate a first signal based on pulse amplitude modulation PAM-N, wherein the intensity distribution of the first signal includes N intensity values, the N intensity values ​​correspond to N-1 intensity differences, the N-1 intensity differences include an i-th intensity difference value and a p-th intensity difference value, the i-th intensity difference value is a difference between an i+1-th intensity value and an i-th intensity value among the N intensity values, the p-th intensity difference value is a difference between a p+1-th intensity value and a p-th intensity value among the N intensity values, i and p are both positive integers less than or equal to N-1, i is less than p, N is a positive integer greater than 2, and the i-th intensity difference value is less than the p-th intensity difference; The first signal is transmitted.

2. The method according to claim 1, characterized in that The first signal is an electrical signal, and the method further includes: generating an optical signal according to the first signal; The optical signal is transmitted via an optical fiber link.

3. The method according to claim 1, characterized in that: The first signal is an optical signal, and the transmitting the first signal includes: The first signal is transmitted via an optical fiber link.

4. The method according to claim 3, characterized in that The generating a first signal based on the PAM-N includes: Generate an electrical signal based on the PAM-N, where the level distribution of the electrical signal includes N level values, the N level values ​​correspond to N-1 level differences, the N-1 level differences include an i-th level difference value and a p-th level difference value, the i-th level difference value is a difference between an i+1-th level value and an i-th level value among the N level values, the p-th level difference value is a difference between a p+1-th level value and a p-th level value among the N level values, and the i-th level difference value is less than the p-th level difference value; generating the first signal according to the electrical signal; Each of the N strength values ​​corresponds to each of the N level values, and each of the N-1 strength difference values ​​corresponds to each of the N-1 level difference values.

5. The method according to claim 3, characterized in that: The generating a first signal based on the PAM-N includes: Generate an electrical signal based on the PAM-N, where the level distribution of the electrical signal includes N level values, the N level values ​​correspond to N-1 level differences, the N-1 level differences include an i-th level difference value and a p-th level difference value, the i-th level difference value is a difference between an i+1-th level value and an i-th level value among the N level values, the p-th level difference value is a difference between a p+1-th level value and a p-th level value among the N level values, and the i-th level difference value is equal to the p-th level difference value; The electrical signal is converted into the first signal by a Mach-Zehnder modulator in a nonlinear modulation mode.

6. The method according to any one of claims 1 to 5, characterized in that The N intensity values ​​correspond to N-1 intensity thresholds, the N-1 intensity thresholds include an i-th intensity threshold and a p-th intensity threshold, the i-th intensity threshold is greater than the i-th intensity value, the i-th intensity threshold is less than the i+1-th intensity value, the p-th intensity threshold is greater than the p-th intensity value, and the p-th intensity threshold is less than the p+1-th intensity value; The i-th intensity difference is the sum of the difference between the i+1-th intensity value and the i-th intensity threshold and the difference between the i-th intensity threshold and the i-th intensity value; The p-th intensity difference value is the sum of the difference between the p+1-th intensity value and the p-th intensity threshold and the difference between the p-th intensity threshold and the p-th intensity value.

7. The method according to claim 6, characterized in that The difference between the i+1th intensity value and the i-th intensity threshold is greater than the difference between the i-th intensity threshold and the i-th intensity value, and the i+1th intensity value is greater than the i-th intensity value; A difference between the p+1th intensity value and the pth intensity threshold is greater than a difference between the pth intensity threshold and the pth intensity value, and the p+1th intensity value is greater than the pth intensity value.

8. The method according to claim 6 or 7, characterized in that: A ratio between a difference between the i+1th intensity value and the i-th intensity threshold and a square root of the i+1th intensity value is a first value, and a ratio between a difference between the i-th intensity value and the i-th intensity threshold and a square root of the i-th intensity value is the first value; The ratio of the difference between the p+1th intensity value and the pth intensity threshold to the square root of the p+1th intensity value is the first value, and the ratio of the difference between the pth intensity value and the pth intensity threshold to the square root of the pth intensity value is the first value.

9. An optical communication method, characterized in that: include: Receive an optical signal sent by a sending device through an optical fiber link, where the optical signal is generated by the sending device based on PAM-N, and the optical power distribution of the optical signal includes N optical power values, the N optical power values ​​correspond to N-1 optical power difference values, the N-1 optical power difference values ​​include an ith optical power difference value and a pth optical power difference value, the ith optical power difference value is a difference between an i+1th optical power value and an ith optical power value among the N optical power values, the pth optical power difference value is a difference between a p+1th optical power value and a pth optical power value among the N optical power values, i and p are both positive integers less than or equal to N-1, i is less than p, N is a positive integer greater than 2, and the ith optical power difference value is less than the pth optical power difference value; The optical signal is processed.

10. The method according to claim 9, characterized in that The processing of the optical signal comprises: Determine N-1 optical power thresholds corresponding to the N optical power values, the N-1 optical power thresholds include an i-th optical power threshold and a p-th optical power threshold, the i-th optical power threshold is greater than the i-th optical power value, the i-th optical power threshold is less than the i+1-th optical power value, the p-th optical power threshold is greater than the p-th optical power value, and the p-th optical power threshold is less than the p+1-th optical power value; The i-th optical power difference is the sum of the difference between the i+1-th optical power value and the i-th optical power threshold and the difference between the i-th optical power threshold and the i-th optical power value; The p-th optical power difference is the sum of the difference between the p+1-th optical power value and the p-th optical power threshold and the difference between the p-th optical power threshold and the p-th optical power value; The optical signal is processed according to the N-1 optical power thresholds.

11. The method according to claim 10, characterized in that The difference between the i+1th optical power value and the i-th optical power threshold is greater than the difference between the i-th optical power threshold and the i-th optical power value, and the i+1th optical power value is greater than the i-th optical power value; A difference between the p+1th optical power value and the pth optical power threshold is greater than a difference between the pth optical power threshold and the pth optical power value, and the p+1th optical power value is greater than the pth optical power value.

12. The method according to claim 10 or 11, characterized in that: The ratio of the difference between the i+1th optical power value and the i-th optical power threshold to the square root of the i+1th optical power value is a first value, and the ratio of the difference between the i-th optical power value and the i-th optical power threshold to the square root of the i-th optical power value is the first value; The ratio of the difference between the p+1th optical power value and the pth optical power threshold to the square root of the p+1th optical power value is the first value, and the ratio of the difference between the pth optical power value and the pth optical power threshold to the square root of the pth optical power value is the first value.

13. A communication device, characterized in that: comprising a processor, the processor being configured to: By executing computer programs or instructions, or by logic circuits, The communication device is enabled to execute the method according to any one of claims 1 to 12.

14. The communication device according to claim 13, characterized in that: The communication device further comprises a memory for storing the computer program or instructions.

15. The communication device according to claim 13 or 14, characterized in that: The communication device further comprises a communication interface, and the communication interface is used for inputting and / or outputting signals.

16. A communication device, characterized in that: Including logic circuits and input and output interfaces, The input and output interface is used to input and / or output signals. The logic circuit is used to execute the method according to any one of claims 1 to 12.

17. A computer-readable storage medium, characterized in that: The computer readable storage medium stores a computer program or instruction. When the computer program or instruction is executed on a computer, The method according to any one of claims 1 to 12 is performed.

18. A computer program product, characterized in that The invention comprises instructions, which, when executed on a computer, enable the method according to any one of claims 1 to 12 to be executed.

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