Bandwidth upgrade control method and device of optical access network and readable storage medium

Abstract

A bandwidth upgrade control method, apparatus, and readable storage medium for an optical access network, relating to the field of optical communication technology, includes: when a target client is detected to need to switch to a target higher-order code pattern, determining the link budget margin of the target client under the current code pattern; determining a target adjustment margin based on the target signal power margin required for the target client to switch from the current code pattern to the target higher-order code pattern and the link budget margin; adjusting the splitting ratio of the tunable optical distribution network where the target client is located based on the target adjustment margin, and controlling both the host and the target client to modulate to the target higher-order code pattern, thereby achieving a network bandwidth upgrade for the target client. This application can improve the flexibility of optical access networks to meet bandwidth upgrade requirements.

Description

Technical Field

[0001] This application relates to the field of optical communication technology, specifically to a bandwidth upgrade control method, apparatus, and readable storage medium for an optical access network. Background Technology

[0002] Currently, digital technology is leading a new round of global technological revolution and industrial transformation, propelling economic and social development into a new stage of digitalization, networking, and intelligence. The flexibility and intelligence of networks are prominent features of this new round of technological revolution and also represent the development trend of next-generation information technology. Among these, high speed and high bandwidth remain the main themes of optical network development, and there will be an increasing demand for flexible and efficient services.

[0003] In the field of optical communications, flexible rate optical access network technology is a new technology that combines optical access technology with the concept of network flexibility. As is well known, Passive Optical Network (PON) is one of the important technologies in the field of optical access; see [link to relevant documentation]. Figure 1 As shown, the system consists of three parts: the central office equipment Optical Line Termination (OLT), the Optical Distribution Network (ODN), and the remote equipment Optical Network Unit (ONU). The ODN network is usually composed of one or more passive optical splitters.

[0004] In existing optical access networks, the splitting ratio of optical distributors is fixed and cannot be changed. Furthermore, once OLT, ODN, and ONU are deployed, the bandwidth capacity of ONU users will be limited by the NRZ (Non-Return to Zero) coding scheme and the bandwidth of optoelectronic devices. This leads to the following situations in existing optical access networks: 1) Due to the bandwidth limitations of optoelectronic devices, traditional networks using only the NRZ coding scheme cannot meet bandwidth requirements when upgrading from 50G to 100G or 200G; 2) If the link budget margin between the host and client is large enough to support higher-order modulation requirements, the fixed coding scheme (NRZ) of the network prevents the client's bandwidth capacity from being increased; 3) If the output optical power of the host is high enough, on-demand allocation of optical power can satisfy the maximum throughput of each branch client device, but the inflexibility of the optical distribution network will prevent the client from adjusting to maximum bandwidth. Therefore, the main reason for these problems is the poor flexibility of existing optical access networks. Therefore, improving the flexibility of optical access networks to meet bandwidth upgrade requirements is an urgent problem that needs to be solved. Summary of the Invention

[0005] This application provides a bandwidth upgrade control method, apparatus, and readable storage medium for optical access networks, which can improve the flexibility of optical access networks to meet bandwidth upgrade requirements.

[0006] In a first aspect, embodiments of this application provide a bandwidth upgrade control method for an optical access network, the optical access network including a host and a client with high-order code modulation capabilities and a tunable optical distribution network, comprising the following steps:

[0007] When it is detected that the target client needs to switch to the target higher-order code pattern, the link budget margin of the target client under the current code pattern is determined;

[0008] The target adjustment margin is determined based on the target signal power margin required for the target client to switch from the current code pattern to the target higher-order code pattern and the link budget margin.

[0009] Based on the target adjustment margin, the splitting ratio of the dimmable distribution network where the target client is located is adjusted, and both the host and the target client are controlled to be modulated to the target high-order code pattern, so as to realize the network bandwidth upgrade of the target client.

[0010] In conjunction with the first aspect, in one implementation, determining the link budget margin of the target client under the current code type includes:

[0011] The receiver-side optical power of the target client under the current code pattern is determined based on the output power of the host under the current code pattern, the preset transmission distance, and the current splitting ratio of the target client.

[0012] The link budget margin of the target client under the current code pattern is calculated based on the optical power of the receiving side and the receiver sensitivity corresponding to the current code pattern.

[0013] In conjunction with the first aspect, in one implementation, determining the target adjustment margin based on the target signal power margin required for the target client to switch from the current code pattern to the target higher-order code pattern and the link budget margin includes:

[0014] The target signal power margin is calculated based on the theoretical signal power margin required for the target client to switch from the current code pattern to the target higher-order code pattern and the preset redundant signal power margin.

[0015] The target adjustment margin is calculated based on the target signal power margin and the link budget margin.

[0016] In conjunction with the first aspect, in one implementation, when the tunable light distribution network comprises only a primary distribution network, adjusting the splitting ratio of the tunable light distribution network where the target client is located based on the target adjustment margin includes:

[0017] When it is detected that at least one of the first clients in the first-level distribution network has a link budget margin greater than the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin.

[0018] The splitting ratio corresponding to the first client is decreased according to the target splitting ratio adjustment amount, and the splitting ratio corresponding to the target client is increased according to the target splitting ratio adjustment amount.

[0019] In conjunction with the first aspect, in one embodiment, the method further includes:

[0020] When it is detected that the link budget margin of each client in the primary distribution network is not greater than the target adjustment margin and the total link budget margin of all clients in the primary distribution network is greater than or equal to the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin.

[0021] Based on the target split ratio adjustment amount, the split ratio corresponding to the client in the primary distribution network whose link budget margin is not less than the preset margin threshold is reduced, and the split ratio corresponding to the target client is increased based on the target split ratio adjustment amount.

[0022] In conjunction with the first aspect, in one embodiment, when the dimmable distribution network includes a multi-level distribution network, adjusting the splitting ratio of the dimmable distribution network where the target client is located based on the target adjustment margin further includes:

[0023] If the target client is in the primary allocation network, then the step of "when it is detected that at least one of the first clients in the primary allocation network has a link budget margin greater than the target adjustment margin" is executed.

[0024] If the target client is in a non-first-level distribution network, when it is detected that the total link budget margin of the first distribution network where the target client is located is less than the target adjustment margin and the total link budget margin of the target distribution network is greater than or equal to the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin. The level of the target distribution network is higher than that of the first distribution network.

[0025] The splitting ratio of the client in the target distribution network is decreased according to the target splitting ratio adjustment amount, and the splitting ratio of the client corresponding to the target client is increased according to the target splitting ratio adjustment amount.

[0026] In conjunction with the first aspect, in one implementation, after the step of stating that the target client is in a non-primary distribution network, the method further includes:

[0027] When the total link budget margin corresponding to the first distributor where the target client is located in the first distribution network is detected to be greater than or equal to the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin.

[0028] The splitting ratio of other clients in the first distributor is decreased according to the target splitting ratio adjustment amount, and the splitting ratio of the client corresponding to the target client is increased according to the target splitting ratio adjustment amount.

[0029] In conjunction with the first aspect, in one implementation, after the step of stating that the target client is in a non-primary distribution network, the method further includes:

[0030] When it is detected that the total link budget margin corresponding to the first distributor of the target client in the first distribution network is less than the target adjustment margin and the total link budget margin corresponding to other distributors in the first distribution network is greater than or equal to the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin.

[0031] The target split ratio is decreased according to the target split ratio adjustment amount, and the split ratio corresponding to the target client is increased according to the target split ratio adjustment amount. The target split ratio includes the split ratio corresponding to other distributors in the target distribution network and the split ratio corresponding to clients in other distributors.

[0032] In conjunction with the first aspect, in one embodiment, the method further includes:

[0033] When no target client is detected that needs to switch to the target higher-order code pattern, the output power of the host under the current code pattern is evenly distributed according to the total number of clients in the optical access network to determine the target link budget margin for each client.

[0034] If the target link budget margin is greater than or equal to the first signal power margin required for the client to switch from the current code pattern to the target higher-order code pattern, for each client, a first margin to be adjusted is determined based on the first signal power margin and the target link budget margin.

[0035] The first adjustment margin is used to increase the splitting ratio of the dimmable distribution network where the client is located, and to control both the host and the client to be modulated to the target high-order code pattern, so as to upgrade the network bandwidth of the client.

[0036] Secondly, embodiments of this application provide a bandwidth upgrade control device for an optical access network, the optical access network including a host terminal and a client terminal with high-order code modulation capability, and a tunable optical distribution network, the device comprising:

[0037] The first processing module is used to determine the link budget margin of the target client under the current code pattern when it is detected that the target client needs to switch to the target higher-order code pattern;

[0038] The second processing module is used to determine the target adjustment margin based on the target signal power margin required for the target client to switch from the current code pattern to the target higher-order code pattern and the link budget margin.

[0039] The upgrade control module is used to adjust the splitting ratio of the dimmable distribution network where the target client is located based on the target adjustment margin, and to control both the host and the target client to be modulated to the target high-order code pattern, so as to realize the network bandwidth upgrade of the target client.

[0040] In conjunction with the second aspect, in one implementation, the first processing module is specifically used for:

[0041] The receiver-side optical power of the target client under the current code pattern is determined based on the output power of the host under the current code pattern, the preset transmission distance, and the current splitting ratio of the target client.

[0042] The link budget margin of the target client under the current code pattern is calculated based on the optical power of the receiving side and the receiver sensitivity corresponding to the current code pattern.

[0043] In conjunction with the second aspect, in one implementation, the second processing module is specifically used for:

[0044] The target signal power margin is calculated based on the theoretical signal power margin required for the target client to switch from the current code pattern to the target higher-order code pattern and the preset redundant signal power margin.

[0045] The target adjustment margin is calculated based on the target signal power margin and the link budget margin.

[0046] In conjunction with the second aspect, in one implementation, when the dimmable distribution network comprises only a primary distribution network, the upgrade control module is specifically used for:

[0047] When it is detected that at least one of the first clients in the first-level distribution network has a link budget margin greater than the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin.

[0048] The splitting ratio corresponding to the first client is decreased according to the target splitting ratio adjustment amount, and the splitting ratio corresponding to the target client is increased according to the target splitting ratio adjustment amount.

[0049] In conjunction with the second aspect, in one implementation, the upgrade control module is further configured to:

[0050] When it is detected that the link budget margin of each client in the primary distribution network is not greater than the target adjustment margin and the total link budget margin of all clients in the primary distribution network is greater than or equal to the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin.

[0051] Based on the target split ratio adjustment amount, the split ratio corresponding to the client in the primary distribution network whose link budget margin is not less than the preset margin threshold is reduced, and the split ratio corresponding to the target client is increased based on the target split ratio adjustment amount.

[0052] In conjunction with the second aspect, in one embodiment, when the dimmable distribution network includes a multi-level distribution network, the upgrade control module is further configured to:

[0053] If the target client is in the primary allocation network, then the step of "when it is detected that at least one of the first clients in the primary allocation network has a link budget margin greater than the target adjustment margin" is executed.

[0054] If the target client is in a non-first-level distribution network, when it is detected that the total link budget margin of the first distribution network where the target client is located is less than the target adjustment margin and the total link budget margin of the target distribution network is greater than or equal to the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin. The level of the target distribution network is higher than that of the first distribution network.

[0055] The splitting ratio of the client in the target distribution network is decreased according to the target splitting ratio adjustment amount, and the splitting ratio of the client corresponding to the target client is increased according to the target splitting ratio adjustment amount.

[0056] In conjunction with the second aspect, in one implementation, the upgrade control module is further configured to:

[0057] When the total link budget margin corresponding to the first distributor where the target client is located in the first distribution network is detected to be greater than or equal to the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin.

[0058] The splitting ratio of other clients in the first distributor is decreased according to the target splitting ratio adjustment amount, and the splitting ratio of the client corresponding to the target client is increased according to the target splitting ratio adjustment amount.

[0059] In conjunction with the second aspect, in one implementation, the upgrade control module is further configured to:

[0060] When it is detected that the total link budget margin corresponding to the first distributor of the target client in the first distribution network is less than the target adjustment margin and the total link budget margin corresponding to other distributors in the first distribution network is greater than or equal to the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin.

[0061] The target split ratio is decreased according to the target split ratio adjustment amount, and the split ratio corresponding to the target client is increased according to the target split ratio adjustment amount. The target split ratio includes the split ratio corresponding to other distributors in the target distribution network and the split ratio corresponding to clients in other distributors.

[0062] In conjunction with the second aspect, in one implementation, when no target client is detected to need to switch to the target higher-order code pattern, the first processing module is further configured to perform equal distribution processing on the output power of the host under the current code pattern according to the total number of clients in the optical access network, so as to determine the target link budget margin for each client;

[0063] The second processing module is further configured to determine a first adjustment margin for each client based on the first signal power margin and the target link budget margin when the target link budget margin is greater than or equal to the first signal power margin required for the client to switch from the current code pattern to the target higher-order code pattern.

[0064] The upgrade control module is also used to increase the splitting ratio of the dimmable distribution network where the client is located by using the first adjustment margin, and to control both the host and the client to be modulated to the target high-order code pattern, so as to realize the network bandwidth upgrade of the client.

[0065] Thirdly, embodiments of this application provide a computer-readable storage medium storing a virtual machine template generation program, wherein when the virtual machine template generation program is executed by a processor, it implements the steps of the virtual machine template generation method as described above.

[0066] The beneficial effects of the technical solutions provided in this application include at least the following:

[0067] An adjustable optical distribution network enables modulation of different code patterns between host and client devices with high-order code pattern modulation capabilities. This prioritizes high-bandwidth clients, allowing for flexible on-demand allocation across the network. Specifically, when a target client is detected needing to switch to a target high-order code pattern, the target adjustment margin is determined by the link budget margin of the target client under the current code pattern and the target signal power margin required for the switch. Based on this adjustment margin, the splitting ratio of the adjustable optical distribution network containing the target client is adjusted to enhance the flexibility of the optical access network and ensure both the host and target client are modulated to the target high-order code pattern, thereby meeting the client's network bandwidth upgrade requirements. Attached Figure Description

[0068] Figure 1 This is a schematic diagram of the structure of an existing optical access system;

[0069] Figure 2 This is a first structural diagram of the optical access network involved in the embodiments of this application;

[0070] Figure 3 This is a schematic diagram of the second structure of the optical access network involved in the embodiments of this application;

[0071] Figure 4 This is a flowchart illustrating an embodiment of the bandwidth upgrade control method for optical access networks according to this application.

[0072] Figure 5 This is a schematic diagram of a primary allocation network scenario involved in the embodiments of this application;

[0073] Figure 6 This is a schematic diagram of a two-level allocation network scenario involved in the embodiments of this application;

[0074] Figure 7 This is a schematic diagram of the hardware structure of the bandwidth upgrade control device for the optical access network involved in the embodiments of this application. Detailed Implementation

[0075] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0076] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0077] In a first aspect, embodiments of this application provide a bandwidth upgrade control method for an optical access network.

[0078] In one embodiment, reference is made to Figure 2 and Figure 3 As shown, the optical access network includes a host terminal and a client terminal with high-order code modulation capability, as well as a tunable optical distribution network.

[0079] As an example, it's understandable that as user access speeds increase, a smooth upgrade from commercially available 50G-PON to higher-speed PON (such as 100G-PON or 200G-PON) requires higher-bandwidth optoelectronic devices. However, current optical access networks, limited by the bandwidth of optoelectronic devices and NRZ coding schemes, lack the capability for a smooth evolution. Furthermore, if one or more ONU users in a PON network require bandwidth upgrades, these users can only meet the upgrade requirements by replacing their ONU optical modules with higher-speed ones or replacing the ONU equipment itself. Additionally, even if the optical power output from the OLT's PON port is sufficient to support the link budget for all connected ONUs with higher bandwidth capabilities, the inflexibility of the existing network prevents any ONU bandwidth upgrades. Therefore, improving the flexibility of optical access networks is crucial to addressing these issues.

[0080] In this embodiment, an adjustable optical distribution network is used to achieve modulation of different codes between the host and client sides, which have high-order code modulation capabilities. This prioritizes client users with high bandwidth requirements, enabling the entire network to flexibly allocate resources on demand. Specifically, this embodiment proposes a flexible optical access network, which is based on a flexible optical distributor with a configurable split ratio. It includes three parts: an optical network host side, an adjustable optical distribution network (i.e., a variable optical distribution network), and optical network clients. The optical port output from the optical network host side is connected to the common optical interface of the adjustable optical distribution network via optical fiber, and the branch optical fibers of the adjustable optical distribution network are connected to the uplink optical fibers of the deployed optical network clients.

[0081] It should be understood that both the optical network host and the optical network client in this embodiment have flexible high-order code modulation and demodulation capabilities. That is, both the host and the client in this embodiment have modulation and demodulation capabilities with different code types, and simultaneously possess the ability to flexibly switch between different code types and the ability to flexibly configure FEC (Forward Error Correction). The tunable optical distribution network consists of a primary distribution network (such as...) Figure 2 (as shown) or multi-level distribution network (such as) Figure 3The adjustable optical distribution network (as shown) consists of optical distributors with configurable splitting ratios at each level. This means the optical distributors in the adjustable distribution network have the ability to flexibly adjust their splitting ratios, and this adjustment can be local or remote. In this embodiment, clients under the same branch distribution network are grouped together. For example, if the adjustable optical distribution network consists of a single-level network, all clients belong to the first group; if the adjustable optical distribution network consists of multiple levels, those connected to the first-level network are grouped into the first group, those connected to the second-level network into the second group, and so on.

[0082] It should be noted that the first electrical chip on the host side mainly performs mapping and encapsulation / demapping / decapsulation between the network-side Ethernet signal and the network-required protocol electrical signals. It also switches between different code types (e.g., NRZ, PAM4, PAM8, or QPSK, QAM4, QAM8, QAM16, etc.) according to network needs, and possesses flexible forward error correction encoding / decoding capabilities (e.g., RS FEC, LDPC FEC, etc.). The second electrical chip on the client side performs mapping and encapsulation / demapping / decapsulation between the user-side Ethernet signal and the network-required protocol electrical signals. It also performs flexible switching between matching code types (e.g., NRZ, PAM4, PAM8, or QPSK, QAM4, QAM8, QAM16, etc.) with the first electrical chip, and possesses the same flexible forward error correction encoding / decoding capabilities (e.g., RS FEC, LDPC FEC, etc.) as the first electrical chip. It is understood that, to ensure normal system operation, the host and client sides in this embodiment will select the same code type and forward error correction encoding / decoding method based on the link conditions.

[0083] The following embodiments will be combined with Figure 2 The working principle of code modulation in the uplink and downlink directions in flexible optical access networks is explained.

[0084] A) Downward direction:

[0085] a. The host and client communicate normally using the default code patterns at both ends. Then, according to the code pattern switching requirements, the host uses the first electrical chip to flexibly switch the code pattern required by the link and outputs the switched code pattern to the first optical module. After electro-optical conversion by the first optical module, it is output to the common optical interface of the tunable optical distribution network.

[0086] b. The tunable optical distribution network outputs the received optical signal from the host to each fiber branch according to the default power distribution ratio;

[0087] c. Each fiber optic branch connects to the second optical module of the client, so that the output after photoelectric conversion by the second optical module is sent to the second electrical chip, so that the second electrical chip demodulates the code sent from the host and sends it to the user-side interface, thereby completing the transmission of downlink signals.

[0088] B) Upward direction:

[0089] a. The client receives information from the user and outputs it to the second optical module through the default modulation code of the second electrical chip for electro-optical conversion before outputting it to the corresponding branch optical fiber;

[0090] b. The tunable optical distribution network receives client optical signals from each branch fiber, multiplexes these signals to a common optical interface, and sends them to the host through the common optical interface;

[0091] c. The first optical module on the host side will receive the optical signal from the common optical interface in the tunable optical distribution network, and after completing the photoelectric conversion, output it to the first electrical chip, so that the uplink signal code demodulation is performed by the first electrical chip and sent to the network side interface, thereby completing the transmission of the uplink signal.

[0092] This embodiment can achieve the following objectives through the above-mentioned flexible optical access system: (1) to enable all clients in the network to achieve high-order modulation in order to meet the high bandwidth requirements of users; (2) to enable high-order modulation for clients with bandwidth requirements, while low-order modulation is used for users without high bandwidth requirements, that is, optical power is prioritized for clients with high bandwidth requirements. For example, when the host obtains the bandwidth requirements of each client and finds that a certain client has high bandwidth requirements, it adjusts the splitting ratio of the fiber connecting the client branch to meet the high bandwidth requirements link budget, and adjusts the code pattern of the client's receiver and transmitter to be high-order modulation, thereby achieving the high bandwidth requirements of the client.

[0093] In one embodiment, Figure 4 This is a flowchart illustrating an embodiment of the bandwidth upgrade control method for optical access networks according to this application. Figure 4 As shown, the bandwidth upgrade control method for optical access networks includes:

[0094] Step S10: When it is detected that the target client needs to switch to the target higher-order code pattern, determine the link budget margin of the target client under the current code pattern.

[0095] In this exemplary embodiment, the host will monitor the high bandwidth demands of clients in the network in real time. Based on the principle of prioritizing the link budget requirements of clients with high bandwidth demands while ensuring the link error rate, the host will switch to a higher-order modulation scheme for these clients, thus providing them with high bandwidth capabilities. Specifically, during normal communication between the host and the client, when a target client in the network is detected to have a need to switch from the current code scheme (e.g., NRZ code scheme) to a target higher-order code scheme (e.g., PAM4 code scheme), the host will calculate the link budget margin of the target client under the current code scheme to determine whether there is sufficient optical power in the current network to achieve higher-order code scheme modulation. It should be noted that the link budget margin can be understood as the bit error rate of this branch link being corrected to zero bit error rate by forward error correction technology in the device.

[0096] Further, in one embodiment, determining the link budget margin of the target client under the current code type includes:

[0097] The receiver-side optical power of the target client under the current code pattern is determined based on the output power of the host under the current code pattern, the preset transmission distance, and the current splitting ratio of the target client.

[0098] The link budget margin of the target client under the current code pattern is calculated based on the optical power of the receiving side and the receiver sensitivity corresponding to the current code pattern.

[0099] As an example, it should be understood that the specific value of the transmission distance can be determined based on the actual distance between the host and the client, and is not limited here. In this embodiment, the receiving optical power of the target client under the current code pattern will be calculated based on the output power of the host under the current code pattern, the transmission distance between the host and the client, and the current splitting ratio of the branch where the target client is located. Then, based on the receiving optical power and the receiver sensitivity corresponding to the current code pattern, the link budget margin of the target client under the current code pattern can be calculated.

[0100] Step S20: Determine the target adjustment margin based on the target signal power margin required for the target client to switch from the current code pattern to the target higher-order code pattern and the link budget margin.

[0101] As an example, it is understandable that the signal power margin required for switching between different code patterns is often fixed; for example, switching from NRZ to PAM4 code pattern requires at least 6.77 dB. Therefore, the target signal power margin can be determined based on the code pattern currently used by the network and the target higher-order code pattern corresponding to the high bandwidth required by the target client. Then, based on the relationship between the link budget margin of the target client under the current code pattern and the target signal power margin, the target adjustment margin (i.e., splitting loss) required for the target client to switch from the current code pattern to the target higher-order code pattern can be determined.

[0102] Further, in one embodiment, determining the target adjustment margin based on the target signal power margin required for the target client to switch from the current code pattern to the target higher-order code pattern and the link budget margin includes:

[0103] The target signal power margin is calculated based on the theoretical signal power margin required for the target client to switch from the current code pattern to the target higher-order code pattern and the preset redundant signal power margin.

[0104] The target adjustment margin is calculated based on the target signal power margin and the link budget margin.

[0105] In this exemplary embodiment, the theoretical signal power margin refers to the minimum signal power margin required to switch from the current code pattern to the target higher-order code pattern. To ensure proper modulation of the higher-order code pattern, not only must the target signal power margin corresponding to the target client reach the theoretical signal power margin required to switch from the current code pattern to the target higher-order code pattern, but an additional redundant signal power margin must also be set as part of the target signal power margin. That is, the target signal power margin is calculated by combining this redundant signal power margin with the theoretical signal power margin required for the target client to switch from the current code pattern to the target higher-order code pattern. It should be noted that the specific values ​​of the theoretical signal power margin and the redundant signal power margin can be determined according to different types of code patterns and are not limited here. For example, the theoretical signal power margin for switching from NRZ code pattern to PAM4 code pattern is typically 4.77 dB, while the redundant signal power margin can preferably be set to 2 dB, then the target signal power margin is 6.77 dB.

[0106] Step S30: Based on the target adjustment margin, adjust the splitting ratio of the tunable optical distribution network where the target client is located, and control both the host and the target client to be modulated to the target high-order code pattern, so as to realize the network bandwidth upgrade of the target client.

[0107] In this exemplary embodiment, once the target adjustment margin corresponding to the target client is determined, the splitting ratio adjustment amount corresponding to the target adjustment margin can be determined according to the correspondence between the adjustment margin (i.e., splitting loss) and splitting ratio stored in Table 1. For example, if the target adjustment margin is 2dB, then the corresponding splitting ratio adjustment amount is 63%. Then, based on this splitting ratio adjustment amount, the allocation ratio of the adjustable optical distribution network branch where the target client is located is increased, that is, the attenuation of the branch channel is reduced, so as to increase the optical power value of the target client's receiving side, thereby meeting the high bandwidth upgrade requirements of the target client. At the same time, while ensuring that the link budget of the other client branch channels is sufficient, the allocation ratio of the other client branches is reduced, that is, the attenuation of the branch channels is increased, so as to reduce the optical power value of the other client's receiving side, thereby completing the flexible adjustment of the client's high-order code modulation power requirements.

[0108] Table 1. Correspondence between spectral ratio and attenuation

[0109]

[0110]

[0111] It should be noted that Table 1 above is only an example presentation, and the specific values ​​of the corresponding relationships can be determined as needed.

[0112] Further, in one embodiment, when the dimmable distribution network includes only a primary distribution network, adjusting the splitting ratio of the dimmable distribution network where the target client is located based on the target adjustment margin includes:

[0113] When it is detected that at least one of the first clients in the first-level distribution network has a link budget margin greater than the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin.

[0114] The splitting ratio corresponding to the first client is decreased according to the target splitting ratio adjustment amount, and the splitting ratio corresponding to the target client is increased according to the target splitting ratio adjustment amount.

[0115] When it is detected that the link budget margin of each client in the primary distribution network is not greater than the target adjustment margin and the total link budget margin of all clients in the primary distribution network is greater than or equal to the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin.

[0116] Based on the target split ratio adjustment amount, the split ratio corresponding to the client in the primary distribution network whose link budget margin is not less than the preset margin threshold is reduced, and the split ratio corresponding to the target client is increased based on the target split ratio adjustment amount.

[0117] As an example, in this embodiment, different splitting ratio control strategies will be employed for the tunable distribution network composed of different levels of distribution networks. Specifically, see [link to details]. Figure 5 As shown, assuming the tunable optical distribution network consists of only one distribution network, and the flexible optical access network comprises a host, a 1:64 split-ratio configurable optical distributor, and 16 clients; both the host and the 16 clients possess the capability for flexible modulation of low-order and high-order codes, such as switching from NRZ to PAM4, PAM8, etc., or from NRZ to QPSK, QAM4, etc., as needed; the working principle of this flexible optical access network can be understood as follows:

[0118] A) Downlink direction: The host and client communicate normally using the default code pattern at both ends. The host processes the electrical signal of the default code pattern through the first electrical chip and outputs it to the first optical module. After photoelectric conversion by the first optical module, it is output to the common optical interface of the split-ratio configurable optical splitter. The split-ratio configurable optical splitter receives the optical signal from the host and outputs it to fiber branches 1 to 16 according to the default power distribution ratio. Fiber branches 1 to 16 are respectively connected to the second optical modules of client 1-1 to client 1-16. After photoelectric conversion by the second optical module, the signal is output to the second electrical chip for code demodulation and sent to the user-side interface, thus completing the transmission of the downlink signal.

[0119] B) Uplink Direction: Clients 1-1 to 1-16 receive information from users and output it to the second optical module via the default modulation code of the second electrical chip for electro-optical conversion, then output it to branches 1 to 16 respectively. The configurable splitter receives optical signals from clients 1 to 16, multiplexes these signals to a common optical interface, and sends them to the host. The first optical module at the host receives the optical signal from the common optical interface of the configurable splitter, performs photoelectric conversion, and outputs it to the second electrical chip for uplink time-division multiplexing code demodulation, then sends it to the network-side interface to complete the uplink signal transmission. All clients coexist in the same network via time-division multiplexing.

[0120] In this flexible optical access network, assuming the default current code type for both the host and client is NRZ (with a code rate of 25Gb / s), and client 1-1 (i.e., the target client) requires a high downlink bandwidth of 50Gb / s, meaning client 1-1 needs to switch from NRZ to PAM4, and the host's optical port output power is +6dBm with an attenuation coefficient of 0.35dB / km, then after a transmission distance of 20km and using a 1:64 splitter (default branch proportional distribution), the optical power reaching each client's receiving side is approximately (6-20...). ×0.35-18=-19dBm), meaning the receiving-side optical power of each client is -19dBm. It should be noted that since the target client's current splitting ratio is the default 1:64, and 64=2^6, 6 splits are required. According to Table 1, each split results in a 3dB loss, so the total loss is 3×6=18. Furthermore, since the NRZ code rate is 25Gb / s, the receiver sensitivity is -24.9dBm@1E-3. The specific code adjustment steps are as follows:

[0121] a) First, the host and 16 clients communicate normally.

[0122] b) When the host detects that client 1-1 has a high bandwidth requirement, the host will calculate the link budget margin of each client (-19-[-24.9]=5.9dB), and the switching between NRZ and PAM4 requires at least 6.77dB (i.e., theoretical signal power margin 4.77dB + redundant signal power margin 2dB) of target signal power margin. Then the target adjustment margin is 6.77dB-5.9dB=0.87dB. In order to ensure the normal modulation of the higher order code, the redundancy can be set, such as increasing the target adjustment margin to 2dB.

[0123] c) Determine whether there is at least one client among the other clients whose link budget margin is greater than or equal to the target adjustment margin;

[0124] d) Since the link budget margin (i.e., 5.9dB) of clients 1-2 to 1-16 is greater than the target adjustment margin (i.e., 2dB), one of the above 15 clients can be selected as the adjustment target without affecting the normal operation of the clients. For example, if client 1-2 is selected as the adjustment target, the adjustment margin of both client 1-1 and client 1-2 is 2dB. That is, the link 2 on branch 2 where client 1-2 is located is reduced by 2dB, while the link 1 on branch 1 connected to client 1-1 is increased by 2dB. That is, the link budget margin corresponding to branch 1 becomes 7.9dB (i.e., the original link budget margin of 5.9dB + the increase of 2dB). Then, based on the target adjustment margin of 2dB, the target split ratio adjustment amount is determined by referring to Table 1 to be 63%. Then, the original split ratio of the link 2 on branch 2 is reduced by 63%, and the original split ratio of the link 1 on branch 1 is increased by 63%.

[0125] However, if the link budget margins of clients 1-2 to 1-16 are not greater than the target adjustment margin, but the total link budget margin of the 15 clients is greater than the target adjustment margin, then clients with link budget margins not less than a preset margin threshold (e.g., a margin threshold of 0dB) will be selected from the 15 clients as adjustment targets, and the target adjustment margin will be evenly distributed to the adjustment targets for split ratio adjustment; for example, if the adjustment targets include clients 1-2 and clients 1-3, then clients 1-2 and clients 1-16 will be adjusted accordingly. The adjustment margin corresponding to -3 is 1dB. Therefore, the branch 2 link where client 1-2 is located and the branch 3 link where client 1-3 is located are reduced by 1dB, while the branch 1 link connecting client 1-1 is increased by 2dB. Then, based on 1dB and 2dB, Table 1 is consulted to determine that the split ratio adjustment corresponding to 1dB is 79% and the split ratio adjustment corresponding to 2dB is 63%. Therefore, the original split ratio of the branch 2 link and the branch 3 link is reduced by 79% respectively, while the original split ratio of the branch 1 link is increased by 63%.

[0126] e) Simultaneously control the host and client to exchange information, and according to the result of the negotiation between the two parties, both are modulated to the same high-order modulation code PAM4 to achieve bidirectional PAM4 rate matching.

[0127] Based on the above steps, flexible adjustments were made to meet the high bandwidth requirements of client 1-1, increasing the downlink bandwidth from 25Gb / s to 50Gb / s.

[0128] It should be noted that if there is not enough optical power in the network, that is, if the total link budget margin of the remaining clients is less than the target adjustment margin, then client 1-1 will be informed that adjustment cannot be made.

[0129] Furthermore, in one embodiment, when the dimmable distribution network includes a multi-level distribution network, adjusting the splitting ratio of the dimmable distribution network where the target client is located based on the target adjustment margin further includes:

[0130] If the target client is in the primary allocation network, then the step of "when it is detected that at least one of the first clients in the primary allocation network has a link budget margin greater than the target adjustment margin" is executed.

[0131] If the target client is in a non-first-level distribution network, when it is detected that the total link budget margin of the first distribution network where the target client is located is less than the target adjustment margin and the total link budget margin of the target distribution network is greater than or equal to the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin. The target distribution network is of a higher level than the first distribution network. The split ratio corresponding to the client in the target distribution network is reduced according to the target split ratio adjustment amount, and the split ratio corresponding to the target client is increased according to the target split ratio adjustment amount.

[0132] If the target client is in a non-first-level distribution network, when the total link budget margin corresponding to the first distributor of the target client in the first distribution network is detected to be greater than or equal to the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin; the split ratio corresponding to other clients in the first distributor is reduced according to the target split ratio adjustment amount, and the split ratio corresponding to the target client is increased according to the target split ratio adjustment amount.

[0133] In one embodiment, when it is detected that the total link budget margin corresponding to the first distributor where the target client is located in the first distribution network is less than the target adjustment margin and the total link budget margin corresponding to other distributors in the first distribution network is greater than or equal to the target adjustment margin, a target split ratio adjustment amount is determined based on the target adjustment margin; the target split ratio is decreased according to the target split ratio adjustment amount, and the split ratio corresponding to the target client is increased according to the target split ratio adjustment amount. The target split ratio includes the split ratios corresponding to other distributors in the target distribution network and the split ratios corresponding to clients in other distributors.

[0134] As an example, it is understandable that, based on typical deployments in existing networks, primary and secondary distribution networks are the most common configurations; therefore, see [link to relevant documentation]. Figure 6As shown in the figure, this embodiment takes a tunable optical distribution network consisting of a primary distribution network and a secondary distribution network as an example to illustrate the splitting ratio control and adjustment strategy under a multi-level distribution network. In the secondary splitting network, the system first analyzes whether the client with high bandwidth requirements belongs to the first group (i.e., the primary distribution network) or the second group (i.e., the secondary distribution network). If it is branch 1 of the first group, the system performs power budgeting based on the branch (i.e., branch 2) channel in the primary optical distributor that is not connected to the secondary optical distributor to calculate the splitting ratio that needs to be increased for branch 1 and the splitting ratio that needs to be decreased for other branches (i.e., branch 2). The system then adjusts the splitting ratio accordingly. It should be noted that the control principle of this code pattern adjustment is similar to the principle of code pattern adjustment in the flexible optical access network that only includes a primary distribution network, and will not be repeated here.

[0135] If a branch 1 (e.g., 2-1-branch 1) belongs to the second group (i.e., the first distribution network), then the power budget is calculated based on the channels of each branch in the second group to determine whether the high-order code modulation switching is met. If it is sufficient, the power of other branches in the second group is reduced to increase the power of this branch (i.e., 2-1-branch 1). If the increase or decrease in the second group will affect the normal operation of the client, in other words, there is not enough optical power in the second group to meet the high-order code modulation switching, then the splitting ratio of each branch in the second group remains unchanged. The power margin of each branch in the first group (i.e., the target distribution network) is further calculated so that the power budget requirement of the client connected to 2-1-branch 1 in the second group can be met by reducing the distribution ratio of each branch in the first group. This process is repeated until the requirement is met.

[0136] For details, see Figure 6 As shown, the flexible optical access network consists of a host, a first-level optical splitter, a second-level optical splitter, and 20 clients. Two clients are connected to the first-level splitter, 16 are connected to the second-level splitter (numbered #2-1), and two are connected to the second-level splitter (numbered #2-2). Both the host and the 20 clients have the capability for flexible modulation of low-order and high-order codes. For example, they can switch from NRZ to PAM4, PAM8, etc., or from NRZ to QPSK, QAM4, etc., as needed. It should be noted that the uplink and downlink operating principles of this flexible optical access network are similar to those of the aforementioned flexible optical access network consisting only of a first-level splitter network, and will not be elaborated further here.

[0137] In this flexible optical access network, assuming the default current code type for both the host and client is NRZ (with a code rate of 25Gb / s), and client 2-01 (i.e., the target client) requires a high downlink bandwidth of 50Gb / s, meaning client 2-01 needs to switch from NRZ to PAM4, and the host's optical port output power is +6dBm with an attenuation coefficient of 0.35dB / km, then after a transmission distance of 20km and through 1:4 splitters (default branch proportional allocation) and 1:16 splitters (default branch proportional allocation), the signal will reach the first... The optical power at the receiving end of each client in the first group is approximately (6 - 20 × 0.35 - 6 = -7 dBm, within the normal operating range of the receiver), meaning the optical power at the receiving end of each client in the first group is -7 dBm. The optical power at the receiving end of each client in the second group is approximately (6 - 20 × 0.35 - 6 - 12 = -19 dBm), meaning the optical power at the receiving end of each client in the second group is -19 dBm, and the sensitivity of the receiver corresponding to the NRZ code is -24.9 dBm@1E-3. The specific code adjustment steps are as follows:

[0138] a) First, the host and 20 clients communicate normally.

[0139] b) When the host detects that client 2-01 has high bandwidth requirements, the host will calculate the link budget margin for each client in the same network as client 2-01. The link budget margin for each client in the first group is (-7 - [-24.9] = 17.9dB), and the link budget margin for each client in the second group is (-19 - [-24.9] = 5.9dB). Since the handover between NRZ and PAM4 requires at least 6.77dB of target signal power margin, it can be seen that the link budget margin of the first group is sufficient, while the link budget margin of the second group is temporarily insufficient. Therefore, the target adjustment margin required by client 2-01 is 6.77dB - 5.9dB = 0.87dB. However, in order to ensure the normal modulation of the higher-order code, a redundancy can be set, such as increasing the target adjustment margin to 2dB.

[0140] c) If the host identifies that client 2-01 is located in the secondary distribution network, then it belongs to the second group and is the #2-1-branch 1 of the second group. Since the power budget of the branch channel #2-1-branch 1 is insufficient (i.e. 5.9dB < 6.77dB), it is necessary to determine whether there is at least one client in the second group whose link budget margin is greater than or equal to the target adjustment margin.

[0141] d) Since the link budget margin (i.e., 5.9dB) of clients 2-02 to 2-016 is greater than the target adjustment margin (i.e., 2dB), one of the above 15 clients can be selected as the adjustment target without affecting the normal operation of the clients. For example, if client 2-02 is selected as the adjustment target, the adjustment margin of both clients 2-01 and 2-02 is 2dB. That is, the link #2-1-branch 2 where client 2-02 is located is reduced by 2dB, while the link #2-1-branch 1 connected to client 2-01 is increased by 2dB. That is, the link budget margin corresponding to #2-1-branch 1 becomes 7.9dB. Then, based on the target adjustment margin of 2dB, the target split ratio adjustment amount is determined to be 63% by referring to Table 1. Then, the original split ratio of the link #2-1-branch 2 is reduced by 63%, and the original split ratio of the link #2-1-branch 1 is increased by 63%.

[0142] If reducing the ratio of branch 2 to branch 16 of #2-1 affects the normal operation of the clients connected to that branch, then the adjustment of the splitting ratio of the clients under the #2-2 distributor can be further considered. It should be noted that the adjustment principle of the splitting ratio of the clients under the #2-2 distributor is similar to the code pattern adjustment principle of the flexible optical access network that only includes the first-level distribution network, and will not be repeated here.

[0143] If the link budget margin of all clients in the second group is not greater than the target adjustment margin, that is, the second group does not have enough optical power to meet the high-order code modulation switching, then the splitting ratio of all clients in the second group remains unchanged, and the adjustment of the splitting ratio of each client in the first group is further considered. It should be noted that the adjustment principle of the splitting ratio of each client in the first group is similar to the code modulation principle of the flexible optical access network that only includes the first-level distribution network, and will not be repeated here. For example, since the link budget margins of clients 1-1 and 1-2 in the first group are both greater than the target adjustment margin, assuming that client 1-1 is the adjustment target without affecting the normal operation of the clients, the adjustment margins of both client 1-1 and client 2-02 are 2dB. That is, the link of branch 1 connected to client 1-1 is reduced by 2dB, while the branch 3 corresponding to the #2-1 distributor where the #2-1-branch 1 of client 2-01 is located is increased by 2dB, thereby controlling the link of #2-1-branch 1 to increase by 2dB, that is, the link budget margin corresponding to #2-1-branch 1 becomes 7.9dB; then, according to the target adjustment margin of 2dB, the target split ratio adjustment amount is determined by referring to Table 1 to determine that it is 63%. Then, the original split ratio of branch 1 connected to client 1-1 is reduced by 63%, while the original split ratio of the link of branch 3 corresponding to the #1-1 distributor is increased by 63%, and the original split ratio of the link of #2-1-branch 1 is increased by 63%.

[0144] e) Simultaneously, the host and client 2-01 exchange information. Based on the results of their negotiation, both are modulated to the same high-order modulation code PAM4 to achieve bidirectional PAM4 rate matching.

[0145] Based on the above steps, the flexible adjustment is completed to meet the high bandwidth requirements of client 2-01. It should be noted that if there is insufficient optical power in the entire network, meaning the total link budget margin for all clients in the network is less than the target adjustment margin, then client 2-01 will be informed that adjustment is not possible.

[0146] It should be understood that for flexible optical access networks with more tiered distribution networks, the flexible adjustment method is similar: First, clients are grouped and stored on the host side; when the host side scans and detects a client issuing a high bandwidth request, it first determines which group the client belongs to. If it is in group n, it calculates whether the link budget of the client in group n meets the requirements for switching to high bandwidth; if it meets the requirements, it directly switches to a higher-order code pattern to achieve high bandwidth; if it does not meet the requirements, the splitting ratio of group n remains unchanged, and it considers whether the splitting ratio of group n-1 can be reduced or increased, and so on. If the requirements are not met from group n to group 2, finally the branches in group 1 are adjusted and the adjustment is completed according to the relationship between the branch ratio and attenuation shown in Table 1 to meet the client's requirements.

[0147] Furthermore, in one embodiment, the method further includes:

[0148] When no target client is detected that needs to switch to the target higher-order code pattern, the output power of the host under the current code pattern is evenly distributed according to the total number of clients in the optical access network to determine the target link budget margin for each client.

[0149] If the target link budget margin is greater than or equal to the first signal power margin required for the client to switch from the current code pattern to the target higher-order code pattern, for each client, the first signal power margin and the target link budget margin determine the first margin to be adjusted;

[0150] The first adjustment margin is used to increase the splitting ratio of the dimmable distribution network where the client is located, and to control both the host and the client to be modulated to the target high-order code pattern, so as to upgrade the network bandwidth of the client.

[0151] As an example, in this embodiment, if clients in the flexible optical access network do not have high bandwidth requirements, the network can temporarily remain unchanged, i.e., the network state remains the same, until a client requests high bandwidth. Of course, the network can also adjust itself to ensure that all clients achieve higher bandwidth. Furthermore, if a user in the ODN network requests a reduction in bandwidth, the system can modulate the user's original high-order code pattern to a low-order code pattern, such as reducing PAM4 to NRZ, and adjust the ODN splitting ratio to reduce the optical power on the corresponding ODN branch, or maintain the ODN splitting ratio unchanged. However, if the user is already using the NRZ code pattern, the system's upper-layer management platform can dynamically reallocate bandwidth to reduce the user's bandwidth, while the ODN splitting ratio remains unchanged.

[0152] In a flexible optical access network where no client requests high bandwidth, the number of clients (n) in the network is first determined. The host then divides its output optical power into n equal parts, determining the target link budget margin for each client. It then checks whether the target link budget margin meets the high-order modulation power budget requirements of all clients in the network; that is, whether the target link budget margin is greater than or equal to the first signal power margin required for the client to switch from the current code pattern to the target high-order code pattern. If not, no adjustment is made; if so, the network can automatically adjust to ensure all clients achieve higher bandwidth. Specifically, the host calculates the insertion loss of each client's path and adjusts the fiber branch allocation ratio for each client. For each client, a first adjustment margin is determined based on the first signal power margin and the target link budget margin. Then, the splitting ratio of the tunable optical distribution network where the client resides is increased using this first adjustment margin, and both the host and the client are controlled to modulate to the target high-order code pattern, thus upgrading the client's network bandwidth. It should be noted that if the conditions are met, the network can be temporarily left unchanged, meaning the network status will remain as is until a client requests high bandwidth, at which point adjustments will be made.

[0153] The specific method for adjusting the spectrophotometer ratio is as follows:

[0154] 1) If the optical distribution network has only one level of splitting (i.e., the optical distribution network consists of only one level of distribution network), then the splitting ratio of each branch of the variable optical distributor is adjusted according to the splitting ratio adjustment amount corresponding to the first adjustment margin that needs to be adjusted for each branch path, so that the optical power received by each client is approximately the same, in order to meet the optical power requirements of high-order code modulation.

[0155] 2) If the optical distribution network has two-stage splitting (i.e., the optical distribution network consists of a primary distribution network and a secondary distribution network), first adjust the branch ratio of the second-stage splitting to make the optical power received by the clients after the second-stage splitting consistent. Then adjust the branch ratio of the first-stage splitting to make the optical power received by each client in the network consistent, so that each client can meet the optical power requirements of high-order code modulation.

[0156] 3) Similarly, if the optical distribution network is an n-level splitter, first adjust the branch distribution ratio of the nth level, and then adjust the branch distribution ratio of the first level.

[0157] 4) The host and client exchange information to adjust to the appropriate high-order code pattern required by the network, thereby increasing the throughput of the network where the client is located and thus improving the bandwidth for the client user.

[0158] Therefore, this embodiment achieves the following objectives: First, it enables all clients in the network to use high-order modulation to meet users' high bandwidth demands; second, it implements high-order modulation for clients with high bandwidth requirements and low-order modulation for users without such requirements, prioritizing optical power for clients with high bandwidth needs. For example, the host obtains the bandwidth requirements of each client and, upon discovering a client with high bandwidth demand, adjusts the splitting ratio of the fiber optic branch connecting that client to meet the high bandwidth demand link budget. This allows the code patterns at the client's receiver and transmitter to be adjusted to high-order modulation, thereby achieving the client's bandwidth requirement.

[0159] In summary, this embodiment, through the use of a variable splitting ratio optical splitter, provides a physical layer foundation for the future intelligence and flexibility of the network; and when the output optical power at the central office is sufficient, the system throughput can be greatly increased through flexible adjustment; furthermore, without changing the existing network, priority is given to client users with high bandwidth requirements, enabling the entire network to achieve flexible allocation on demand.

[0160] Secondly, embodiments of this application also provide a bandwidth upgrade control device for an optical access network.

[0161] In one embodiment, the optical access network in the bandwidth upgrade control device of the optical access network includes a host end and a client end with high-order code modulation capability, as well as a tunable optical distribution network. The device includes:

[0162] The first processing module is used to determine the link budget margin of the target client under the current code pattern when it is detected that the target client needs to switch to the target higher-order code pattern;

[0163] The second processing module is used to determine the target adjustment margin based on the target signal power margin required for the target client to switch from the current code pattern to the target higher-order code pattern and the link budget margin.

[0164] The upgrade control module is used to adjust the splitting ratio of the dimmable distribution network where the target client is located based on the target adjustment margin, and to control both the host and the target client to be modulated to the target high-order code pattern, so as to realize the network bandwidth upgrade of the target client.

[0165] Furthermore, in one embodiment, the first processing module is specifically used for:

[0166] The receiver-side optical power of the target client under the current code pattern is determined based on the output power of the host under the current code pattern, the preset transmission distance, and the current splitting ratio of the target client.

[0167] The link budget margin of the target client under the current code pattern is calculated based on the optical power of the receiving side and the receiver sensitivity corresponding to the current code pattern.

[0168] Furthermore, in one embodiment, the second processing module is specifically used for:

[0169] The target signal power margin is calculated based on the theoretical signal power margin required for the target client to switch from the current code pattern to the target higher-order code pattern and the preset redundant signal power margin.

[0170] The target adjustment margin is calculated based on the target signal power margin and the link budget margin.

[0171] Furthermore, in one embodiment, when the dimmable distribution network includes only a primary distribution network, the upgrade control module is specifically used for:

[0172] When it is detected that at least one of the first clients in the first-level distribution network has a link budget margin greater than the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin.

[0173] The splitting ratio corresponding to the first client is decreased according to the target splitting ratio adjustment amount, and the splitting ratio corresponding to the target client is increased according to the target splitting ratio adjustment amount.

[0174] Furthermore, in one embodiment, the upgrade control module is specifically used for:

[0175] When it is detected that the link budget margin of each client in the primary distribution network is not greater than the target adjustment margin and the total link budget margin of all clients in the primary distribution network is greater than or equal to the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin.

[0176] Based on the target split ratio adjustment amount, the split ratio corresponding to the client in the primary distribution network whose link budget margin is not less than the preset margin threshold is reduced, and the split ratio corresponding to the target client is increased based on the target split ratio adjustment amount.

[0177] Furthermore, in one embodiment, when the dimmable distribution network includes a multi-level distribution network, the upgrade control module is specifically further used for:

[0178] If the target client is in the primary allocation network, then the step of "when it is detected that at least one of the first clients in the primary allocation network has a link budget margin greater than the target adjustment margin" is executed.

[0179] If the target client is in a non-first-level distribution network, when it is detected that the total link budget margin of the first distribution network where the target client is located is less than the target adjustment margin and the total link budget margin of the target distribution network is greater than or equal to the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin. The level of the target distribution network is higher than that of the first distribution network.

[0180] The splitting ratio of the client in the target distribution network is decreased according to the target splitting ratio adjustment amount, and the splitting ratio of the client corresponding to the target client is increased according to the target splitting ratio adjustment amount.

[0181] Furthermore, in one embodiment, the upgrade control module is specifically used for:

[0182] When the total link budget margin corresponding to the first distributor where the target client is located in the first distribution network is detected to be greater than or equal to the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin.

[0183] The splitting ratio of other clients in the first distributor is decreased according to the target splitting ratio adjustment amount, and the splitting ratio of the client corresponding to the target client is increased according to the target splitting ratio adjustment amount.

[0184] Furthermore, in one embodiment, the upgrade control module is specifically used for:

[0185] When it is detected that the total link budget margin corresponding to the first distributor of the target client in the first distribution network is less than the target adjustment margin and the total link budget margin corresponding to other distributors in the first distribution network is greater than or equal to the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin.

[0186] The target split ratio is decreased according to the target split ratio adjustment amount, and the split ratio corresponding to the target client is increased according to the target split ratio adjustment amount. The target split ratio includes the split ratio corresponding to other distributors in the target distribution network and the split ratio corresponding to clients in other distributors.

[0187] Furthermore, in one embodiment, when no target client is detected to need to switch to the target higher-order code pattern, the first processing module is further configured to distribute the output power of the host under the current code pattern equally according to the total number of clients in the optical access network, so as to determine the target link budget margin for each client;

[0188] The second processing module is further configured to determine a first adjustment margin for each client based on the first signal power margin and the target link budget margin when the target link budget margin is greater than or equal to the first signal power margin required for the client to switch from the current code pattern to the target higher-order code pattern.

[0189] The upgrade control module is also used to increase the splitting ratio of the dimmable distribution network where the client is located by using the first adjustment margin, and to control both the host and the client to be modulated to the target high-order code pattern, so as to realize the network bandwidth upgrade of the client.

[0190] The functions of each module in the bandwidth upgrade control device of the optical access network correspond to the steps in the embodiment of the bandwidth upgrade control method of the optical access network. Their functions and implementation processes will not be described in detail here.

[0191] Thirdly, embodiments of this application also provide a computer-readable storage medium.

[0192] The present application has a readable storage medium storing a bandwidth upgrade control program for an optical access network, wherein when the bandwidth upgrade control program for the optical access network is executed by a processor, the steps of the bandwidth upgrade control method for the optical access network as described above are implemented.

[0193] The method implemented when the bandwidth upgrade control program of the optical access network is executed can be referred to in various embodiments of the bandwidth upgrade control method of the optical access network of this application, and will not be repeated here.

[0194] Fourthly, embodiments of this application provide a bandwidth upgrade control device for an optical access network. The bandwidth upgrade control device for an optical access network can be a device with data processing capabilities, such as a passive optical network.

[0195] Reference Figure 7 , Figure 7This is a schematic diagram of the hardware structure of the bandwidth upgrade control device for an optical access network involved in the embodiments of this application. In this embodiment, the bandwidth upgrade control device for the optical access network may include a processor, a memory, a communication interface, and a communication bus.

[0196] The communication bus can be of any type and is used to interconnect the processor, memory, and communication interface.

[0197] Communication interfaces include input / output (I / O) interfaces, physical interfaces, and logical interfaces used for interconnecting devices within the bandwidth upgrade control equipment of the optical access network, as well as interfaces used for interconnecting the bandwidth upgrade control equipment of the optical access network with other devices (such as other computing devices or user equipment). Physical interfaces can be Ethernet interfaces, fiber optic interfaces, ATM interfaces, etc.; user equipment can be displays, keyboards, etc.

[0198] Memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0199] The processor can be a general-purpose processor, which can call the bandwidth upgrade control program for the optical access network stored in the memory and execute the bandwidth upgrade control method for the optical access network provided in the embodiments of this application. For example, the general-purpose processor can be a central processing unit (CPU). The method executed when the bandwidth upgrade control program for the optical access network is called can be referred to in the various embodiments of the bandwidth upgrade control method for the optical access network of this application, and will not be repeated here.

[0200] As will be understood by those skilled in the art, Figure 7 The hardware structure shown does not constitute a limitation of this application and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0201] It should be noted that the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices. The terms "first," "second," and "third," etc., are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first," "second," and "third" to different types.

[0202] In the description of the embodiments of this application, terms such as "exemplary," "for example," or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplary," "for example," or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary," "for example," or "for instance" is intended to present the relevant concepts in a concrete manner.

[0203] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0204] In some processes described in the embodiments of this application, multiple operations or steps are included in a specific order. However, it should be understood that these operations or steps may not be executed in the order they appear in the embodiments of this application, or they may be executed in parallel. The sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed sequentially or in parallel, and these operations or steps may be combined.

[0205] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A bandwidth upgrade control method of an optical access network, characterized by, The optical access network includes host and client terminals with high-order code modulation capabilities, as well as a tunable optical distribution network, and includes the following steps: When it is detected that the target client needs to switch to the target higher-order code pattern, the link budget margin of the target client under the current code pattern is determined; The target adjustment margin is determined based on the target signal power margin required for the target client to switch from the current code pattern to the target higher-order code pattern and the link budget margin. Based on the target adjustment margin, the splitting ratio of the dimmable distribution network where the target client is located is adjusted, and both the host and the target client are controlled to be modulated to the target high-order code pattern, so as to realize the network bandwidth upgrade of the target client.

2. The bandwidth upgrade control method of an optical access network according to claim 1, wherein, Determining the link budget margin of the target client under the current code type includes: The receiver-side optical power of the target client under the current code pattern is determined based on the output power of the host under the current code pattern, the preset transmission distance, and the current splitting ratio of the target client. The link budget margin of the target client under the current code pattern is calculated based on the optical power of the receiving side and the receiver sensitivity corresponding to the current code pattern.

3. The bandwidth upgrade control method for an optical access network as described in claim 1, characterized in that, The step of determining the target adjustment margin based on the target signal power margin required for the target client to switch from the current code pattern to the target higher-order code pattern and the link budget margin includes: The target signal power margin is calculated based on the theoretical signal power margin required for the target client to switch from the current code pattern to the target higher-order code pattern and the preset redundant signal power margin. The target adjustment margin is calculated based on the target signal power margin and the link budget margin.

4. The bandwidth upgrade control method for an optical access network as described in claim 1, characterized in that, When the tunable light distribution network consists of only a primary distribution network, adjusting the splitting ratio of the tunable light distribution network where the target client is located based on the target adjustable margin includes: When it is detected that at least one of the first clients in the first-level distribution network has a link budget margin greater than the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin. The splitting ratio corresponding to the first client is decreased according to the target splitting ratio adjustment amount, and the splitting ratio corresponding to the target client is increased according to the target splitting ratio adjustment amount.

5. The bandwidth upgrade control method for an optical access network as described in claim 4, characterized in that, The method further includes: When it is detected that the link budget margin of each client in the primary distribution network is not greater than the target adjustment margin and the total link budget margin of all clients in the primary distribution network is greater than or equal to the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin. Based on the target split ratio adjustment amount, the split ratio corresponding to the client in the primary distribution network whose link budget margin is not less than the preset margin threshold is reduced, and the split ratio corresponding to the target client is increased based on the target split ratio adjustment amount.

6. The bandwidth upgrade control method for an optical access network as described in claim 5, characterized in that, When the tunable light distribution network includes a multi-level distribution network, the adjustment of the splitting ratio of the tunable light distribution network where the target client is located based on the target adjustment margin further includes: If the target client is in the primary allocation network, then the step of "when it is detected that at least one of the first clients in the primary allocation network has a link budget margin greater than the target adjustment margin" is executed. If the target client is in a non-first-level distribution network, when it is detected that the total link budget margin of the first distribution network where the target client is located is less than the target adjustment margin and the total link budget margin of the target distribution network is greater than or equal to the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin. The level of the target distribution network is higher than that of the first distribution network. The splitting ratio of the client in the target distribution network is decreased according to the target splitting ratio adjustment amount, and the splitting ratio of the client corresponding to the target client is increased according to the target splitting ratio adjustment amount.

7. The bandwidth upgrade control method for an optical access network as described in claim 6, characterized in that, Following the step of stating that the target client is in a non-primary distribution network, the method further includes: When the total link budget margin corresponding to the first distributor where the target client is located in the first distribution network is detected to be greater than or equal to the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin. The splitting ratio of other clients in the first distributor is decreased according to the target splitting ratio adjustment amount, and the splitting ratio of the client corresponding to the target client is increased according to the target splitting ratio adjustment amount.

8. The bandwidth upgrade control method of an optical access network according to claim 6, wherein, Following the step of stating that the target client is in a non-primary distribution network, the method further includes: When it is detected that the total link budget margin corresponding to the first distributor of the target client in the first distribution network is less than the target adjustment margin and the total link budget margin corresponding to other distributors in the first distribution network is greater than or equal to the target adjustment margin, the target split ratio adjustment amount is determined based on the target adjustment margin. The target split ratio is decreased according to the target split ratio adjustment amount, and the split ratio corresponding to the target client is increased according to the target split ratio adjustment amount. The target split ratio includes the split ratio corresponding to other distributors in the target distribution network and the split ratio corresponding to clients in other distributors.

9. The bandwidth upgrade control method of an optical access network according to claim 1, wherein, The method further includes: When no target client is detected that needs to switch to the target higher-order code pattern, the output power of the host under the current code pattern is evenly distributed according to the total number of clients in the optical access network to determine the target link budget margin for each client. If the target link budget margin is greater than or equal to the first signal power margin required for the client to switch from the current code pattern to the target higher-order code pattern, for each client, a first margin to be adjusted is determined based on the first signal power margin and the target link budget margin. The first adjustment margin is used to increase the splitting ratio of the dimmable distribution network where the client is located, and to control both the host and the client to be modulated to the target high-order code pattern, so as to upgrade the network bandwidth of the client.

10. A bandwidth upgrade control device for an optical access network, characterized in that, The optical access network includes a host terminal and a client terminal with high-order code modulation capability, as well as a tunable optical distribution network. The device includes: The first processing module is used to determine the link budget margin of the target client under the current code pattern when it is detected that the target client needs to switch to the target higher-order code pattern; The second processing module is used to determine the target adjustment margin based on the target signal power margin required for the target client to switch from the current code pattern to the target higher-order code pattern and the link budget margin. The upgrade control module is used to adjust the splitting ratio of the dimmable distribution network where the target client is located based on the target adjustment margin, and to control both the host and the target client to be modulated to the target high-order code pattern, so as to realize the network bandwidth upgrade of the target client.

11. A computer readable storage medium, characterized in that, The computer-readable storage medium stores a bandwidth upgrade control program for an optical access network, wherein when the bandwidth upgrade control program for the optical access network is executed by a processor, it implements the steps of the bandwidth upgrade control method for an optical access network as described in any one of claims 1 to 9.

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