An optical distribution network apparatus and a signal processing method

Abstract

Embodiments of the present application disclose an optical distribution network (ODN) device and a signal processing method, which are used for transmitting identification information of a plurality of optical network units (ONUs) and port identification information of the ODN device to an optical line termination (OLT), and the identification information and the port identification information are used for the OLT to determine network topology information of a passive optical network (PON) system. The ODN device comprises a splitting module, a control chip, a first optical port connected to the OLT, a second optical port connected to a next-level ODN device, and a plurality of third optical-electric composite ports connected to the plurality of ONUs. The control chip respectively sends a plurality of electrical signals carrying the port identification information to the corresponding plurality of ONUs. The splitting module splits a first optical signal transmitted by the OLT into a second optical signal transmitted to the next-level ODN device and a plurality of third optical signals transmitted to the plurality of ONUs. The splitting module is further used for respectively receiving uplink optical signals of the corresponding plurality of ONUs and transmitting the uplink optical signals to the OLT, wherein the uplink optical signals carry identification information of the ONUs transmitting the uplink optical signals and corresponding port identification information.

Description

Technical Field

[0001] This application relates to the field of signal processing, and more particularly to an optical distribution network device and a signal processing method. Background Technology

[0002] In a passive optical network (PON) system, the OLT splits and transmits the power of the downlink optical signal through an optical distribution network (ODN) device, thereby transmitting a downlink optical signal to multiple optical network units (ONUs), thus realizing one-to-many optical interconnection.

[0003] In a PON (Pulse-Only) network, an ODN (Optical Distribution Network) device includes multiple optical splitters. These splitters, with fixed splitting ratios, divide the optical signal power and transmit it through the optical cable, allowing the optical signal sent by an Optical Line Terminal (OLT) to be transmitted to multiple ONUs (Optical Network Units). Specifically, for example, a PON network may include four ODN devices. Each ODN device has one input port and nine output ports. These four ODN devices are connected in series. One of the nine output ports of the first three splitters is connected to the input port of the next-level splitter, and the other output ports are connected to eight ONUs, thus forming a 1:32 PON system. The first three splitters, using a fixed 7:3 splitting ratio, distribute 70% of the received optical signal's energy to the next-level splitter and 30% to the remaining eight output ports used to connect the ONUs, ensuring that the optical signal output from the final splitter meets the needs of the connected ONUs.

[0004] In existing technologies, ODN devices simply transmit the optical signals sent by the OLT to multiple ONUs through power splitting and optical fiber transmission, but the OLT cannot determine the network topology information in the entire PON network. Summary of the Invention

[0005] This application provides an optical distribution network device and a signal processing method for transmitting identification information and port identification information of multiple ONUs to an OLT through an ODN device. The identification information and port identification information of the multiple ONUs are used by the OLT to determine the network topology information of the PON system.

[0006] The first aspect of this application provides an optical distribution network (ODN) device. The ODN device includes a splitting module, a control chip, a first optical port, a second optical port, and multiple third optoelectronic composite ports. The splitting module is connected to the control chip, the first optical port, the second optical port, and the multiple third optoelectronic composite ports. The first optical port is used to connect to an optical line terminal (OLT) and transmit optical signals between the ODN device and the OLT. The second optical port is used to connect to a next-level ODN device and transmit optical signals between the ODN device and the next-level ODN device. The multiple third optoelectronic composite ports are used to connect to multiple online unit (ONU) devices and transmit optical and electrical signals between the ODN device and the multiple ONUs. Each third optoelectronic composite port can simultaneously transmit both optical and electrical signals. The control chip controls the multiple third optoelectronic composite ports to send multiple electrical signals carrying port identification information to the corresponding multiple ONUs. The port identification information indicates the identifier of the multiple third optoelectronic composite ports. The splitting module is used to split the power of the first optical signal transmitted by the OLT into a second optical signal and multiple third optical signals. The second optical signal is used to transmit to the next-level ODN device, and the multiple third optical signals are used to transmit to the multiple ONUs. The splitter module is also used to receive uplink optical signals from multiple corresponding ONUs from multiple third optoelectronic composite ports and transmit them to the OLT. The uplink optical signals carry the identification information of the ONU that sent the uplink optical signals and the port identification information of the corresponding third optoelectronic composite port that transmitted the uplink optical signals.

[0007] In this possible implementation, the ODN device transmits identification information and port identification information of multiple ONUs to the OLT, enabling the OLT to determine the network topology information based on this information. This network topology information includes the correspondence between multiple ONUs and multiple third optoelectronic ports.

[0008] In one possible implementation of the first aspect, the ODN device further includes a first optical power monitor (MPD), which is connected to a first optical port. The first MPD is used to acquire the first optical power of a first optical signal and transmit the first optical power to a control chip. The control chip is also used to control at least one of a plurality of third optoelectronic composite ports to send at least one electrical signal carrying the first optical power to at least one of a plurality of ONUs, wherein the at least one third optoelectronic composite port corresponds to at least one ONU. The beam splitter is further used to receive uplink optical signals from at least one ONU from the plurality of third optoelectronic composite ports and transmit them to an OLT, wherein the uplink optical signals from at least one ONU carry the first optical power. The beam splitter is also used to receive uplink optical signals from a next-level ODN device from a second optical port and transmit them to an OLT, wherein the uplink optical signals from the next-level ODN device carry the first optical power of the next-level ODN device.

[0009] In one possible implementation of the first aspect, the uplink optical signal of at least one ONU also carries the downlink optical power received by at least one ONU, and the uplink optical signal of the next-level ODN device also carries the downlink optical power received by multiple ONUs connected to the next-level ODN device.

[0010] In this possible implementation, the ODN device transmits its own first optical power, the first optical power of the next-level ODN device, the downlink optical power received by the multiple ONUs connected to the ODN device, and the downlink optical power received by the multiple ONUs connected to the next-level ODN to the OLT, so that the OLT can determine the network topology information based on this power information. The network topology information also includes the hierarchical information of the ODN device and the hierarchical information of the multiple ONUs.

[0011] In one possible implementation of the first aspect, the ODN device further includes a second MPD and a third MPD, respectively connected to a second optical port and a plurality of third optoelectronic ports. The second MPD is used to acquire the second optical power of the second optical signal and transmit the second optical power to the control chip. The third MPD is used to acquire the third optical power of the plurality of third optical signals and transmit the third optical power to the control chip. The control chip is further used to control at least one of the plurality of third optoelectronic composite ports to send at least one electrical signal carrying the second optical power and the third optical power to at least one of the corresponding plurality of ONUs, wherein the at least one third optoelectronic composite port corresponds to at least one ONU. The beam splitter is further used to receive uplink optical signals from the plurality of third optoelectronic composite ports corresponding to at least one ONU and transmit them to the OLT. The uplink optical signals carry the first to third optical powers and the downlink optical power received by the plurality of ONUs.

[0012] In one possible implementation of the first aspect, the ODN device further includes a first filter, a second filter, and a third filter. The first MPD is connected to the beam splitter module via the first filter, the second MPD is connected to the beam splitter module via the second filter, and the third MPD is connected to the beam splitter module via the third filter. The first filter is used to filter the optical signal received by the first MPD. The second filter is used to filter the optical signal received by the second MPD. The third filter is used to filter the optical signal received by the third MPD. This possible implementation allows the OLT to determine the optical power loss based on the acquired power information. The optical power loss includes the optical power loss from the OLT to the ODN device, the optical power loss from the first optical port to the second and third optical ports, and the optical power loss between the third optical port and multiple ONUs.

[0013] In one possible implementation of the first aspect, the beam splitting module includes a first beam splitter and an equal-power beam splitter, with the output port of the first beam splitter connected to the input port of the equal-power beam splitter. The equal-power beam splitter is used to split the power of an input optical signal into multiple output optical signals of equal power. The first beam splitter is used to split the power of the first optical signal into a second optical signal and a fourth optical signal. The equal-power beam splitter is used to split the power of the fourth optical signal into multiple third optical signals.

[0014] In one possible implementation of the first aspect, the first beam splitter is an adjustable beam splitter. An adjustable beam splitter refers to a beam splitter whose power splitting ratio is adjustable.

[0015] In this possible implementation, the first beam splitter is an adjustable beam splitter, so the optical power ratio of the second optical signal and multiple third optical signals can be adjusted simply and efficiently by directly adjusting the splitting ratio of the first beam splitter.

[0016] A second aspect of this application provides a signal processing method. This method is applied to an ODN device connected to an OLT, multiple ONUs, and a next-level ODN device. The method includes: the ODN device receiving a first optical signal transmitted by the Optical Line Terminal (OLT); the ODN device splitting the power of the first optical signal into a second optical signal and multiple third optical signals; the ODN device transmitting the second optical signal to the next-level ODN device and transmitting the multiple third optical signals to their respective ONUs; the ODN device sending multiple electrical signals carrying port identification information to the corresponding ONUs, the port identification information indicating the identifiers of the multiple third optoelectronic composite ports; and the ODN device receiving uplink optical signals from the multiple ONUs and transmitting them to the OLT, the uplink optical signals carrying the identifier information of the ONU transmitting the uplink optical signal and the port identification information of the corresponding third optoelectronic composite port transmitting the uplink optical signal, the uplink optical signals being used to determine network topology information. The network topology information includes the correspondence between the multiple ONUs and the multiple third optoelectronic ports.

[0017] In this possible implementation, the ODN device transmits identification information and port identification information of multiple ONUs to the OLT, enabling the OLT to determine the network topology information based on this information. This network topology information includes the correspondence between multiple ONUs and multiple third optoelectronic ports.

[0018] In one possible implementation of the second aspect, the method further includes: the ODN device acquiring the first optical power of the first optical signal. The ODN device sends at least one electrical signal carrying the first optical power to at least one ONU among a plurality of ONUs. The ODN device receives uplink optical signals from at least one ONU and transmits them to the OLT, the uplink optical signals of the at least one ONU carrying the first optical power. The ODN device receives uplink optical signals from the next-level ODN device and transmits them to the OLT, the uplink optical signals of the next-level ODN device carrying the first optical power of the next-level ODN device, the uplink optical signals of the at least one ONU being used to determine network topology information. The network topology information includes the hierarchical information of the ODN device and the hierarchical information to which the plurality of ONUs belong.

[0019] In one possible implementation of the second aspect, the uplink optical signal of at least one ONU also carries the downlink optical power received by at least one ONU, and the uplink optical signal of the next-level ODN device also carries the downlink optical power received by multiple ONUs connected to the next-level ODN device.

[0020] In this possible implementation, the ODN device transmits its own first optical power and the first optical power of the next-level ODN device. The downlink optical power received by the multiple ONUs connected to the ODN device, and the downlink optical power received by the multiple ONUs connected to the next-level ODN, are also transmitted to the OLT, allowing the OLT to determine more network topology information based on this power information. The network topology information also includes the hierarchical information of the ODN device and the hierarchical information of the multiple ONUs.

[0021] In one possible implementation of the second aspect, the method further includes: an ODN device acquiring the second optical power of a second optical signal; the ODN device acquiring the third optical power of multiple third optical signals; the ODN device sending multiple electrical signals carrying the second and third optical powers to multiple ONUs; and the ODN device receiving uplink optical signals from the corresponding multiple ONUs and transmitting them to the OLT. The uplink optical signals carry indications of the first, second, and third optical powers, and the downlink optical power received by the multiple ONUs. The uplink optical signals are used to determine optical power loss, which includes optical power loss from the OLT to the ODN device, optical power loss from the first optical port to the second and third optical ports, and optical power loss between the third optical port and the multiple ONUs.

[0022] In this possible implementation, the ODN device also sends the first optical power, the second optical power, the third optical power, and the downlink optical power received by multiple ONUs to the OLT, so that the OLT can determine the optical power loss based on this power information. The optical power loss includes the optical power loss from the OLT to the ODN device, the optical power loss from the first optical port to the second and third optical ports, and the optical power loss from the third optical port to the multiple ONUs.

[0023] In one possible implementation of the second aspect, the aforementioned ODN device includes a first optical splitter and an equal-power optical splitter. The ODN device splits the power of a first optical signal into a second optical signal and a plurality of third optical signals, including: the ODN device splits the power of the first optical signal into a second optical signal and a fourth optical signal using the first optical splitter; and the ODN device splits the power of the fourth optical signal into a plurality of third optical signals with equal optical power using the equal-power optical splitter.

[0024] In this possible implementation, the beam splitting module splits the power of the first optical signal into a second optical signal and multiple third optical signals using a first beam splitter and an equal beam splitter. The optical power ratio of the second optical signal and the multiple third optical signals can be directly determined by the splitting ratio of the first beam splitter. The equal beam splitter splits the power of the fourth optical signal into multiple third optical signals, thereby providing multiple third optical signals with equal optical power to multiple ONUs.

[0025] In one possible implementation of the second aspect, the first optical splitter is an adjustable power splitter, and the method further includes: an ODN device receiving first uplink optical signals transmitted by multiple ONUs and transmitting the first uplink optical signals to an OLT through a first optical port. The first uplink optical signals carry network address information of the multiple ONUs and multiple first downlink optical powers received by the multiple ONUs. The ODN device receives downlink optical signals transmitted by the OLT and sends the downlink optical signals to a target ONU indicated by the downlink optical signals. The downlink optical signals carry an adjustment signal, and the target ONU is the ONU with the lowest first downlink optical power among the multiple ONUs determined by the OLT. The ODN device receives an electrical signal carrying the adjustment signal transmitted by the target ONU, and the adjustment signal instructs the ODN device to adjust the adjustable optical splitter to increase the optical power of the target third optical signal output from the target third opto-port. The target third opto-port and the target third optical signal correspond to the target ONU.

[0026] In this possible implementation, the optical power of the downlink optical signal received by the target ONU is increased by adjusting the splitting ratio of the adjustable splitter. By performing this step multiple times, the power of the optical signals received by the multiple ONUs in the entire system is made more balanced.

[0027] In one possible implementation of the second aspect, the method further includes: the ODN device receiving a second uplink optical signal sent by multiple ONUs and transmitting the second uplink optical signal to the OLT. The second uplink optical signal carries network address information of the multiple ONUs and the second downlink optical power received by the multiple ONUs. The first uplink optical signal and the second uplink optical signal are used to determine network topology information, which also includes the hierarchical information of the ODN device.

[0028] In this possible implementation, the ODN device transmits a first uplink optical signal and a second uplink optical signal to the OLT. This allows the OLT to determine the network topology information based on the network address information of multiple ONUs carried in the first and second uplink optical signals, the multiple first downlink optical powers received by the multiple ONUs, and the multiple second downlink optical powers received by the multiple ONUs. This network topology information includes the hierarchical information of the ODN device.

[0029] A third aspect of this application provides a signal processing method. The method is applied to an OLT (Optical Linear Transmission Unit), which is connected to an ODN (Optical Distribution Network) device, which in turn is connected to a next-level ODN device and multiple ONUs (Optical Network Units). The method includes: the OLT sending a first optical signal to the ODN device; the OLT receiving multiple uplink optical signals transmitted by multiple ONUs from the ODN device, the multiple uplink optical signals carrying port identification information and corresponding network address information for the multiple ONUs; the port identification information indicating the identifiers of multiple third optoelectronic ports connected to the ODN device and the multiple ONUs; and the OLT determining network topology information based on the port identification information and the multiple network address information, the network topology information including the correspondence information between the multiple ONUs and the multiple third optoelectronic ports.

[0030] In this possible implementation, the OLT receives identification information and port identification information of multiple ONUs sent by the ODN device, and then determines the network topology information based on this information. This network topology information includes the correspondence between multiple ONUs and multiple third optoelectronic ports.

[0031] In one possible implementation of the third aspect, the method further includes: the OLT receiving an uplink optical signal transmitted by the ODN device. The uplink optical signal carries the first optical power of the ODN device. The uplink optical signal also carries the first optical power of at least one subordinate ODN device. The OLT determines network topology information based on the information carried by the uplink optical signal. The network topology information includes the hierarchical information of the ODN device, the hierarchical information of at least one subordinate ODN device, and the hierarchical information of the corresponding multiple ONUs. The higher the first optical power and / or the downlink optical power received by the multiple ONUs, the higher the hierarchical level of the corresponding ODN device.

[0032] In one possible implementation of the third aspect, the uplink optical signal also carries downlink optical power received by multiple ONUs connected to the ODN device and downlink optical power received by multiple ONUs connected to at least one lower-level ODN device.

[0033] In this possible implementation, the OLT receives its own first optical power and the first optical power of the next-level ODN device from the ODN device. It also receives the downlink optical power received by multiple ONUs connected to the ODN device and the downlink optical power received by multiple ONUs connected to the next-level ODN. The OLT can then determine more network topology information based on this power information, which includes the hierarchical information of the ODN device and the hierarchical information of the multiple ONUs.

[0034] In one possible implementation of the third aspect, the method further includes: the OLT receiving an uplink optical signal transmitted by the ODN device, the uplink optical signal carrying information about a first optical power of a first optical signal, a second optical power of a second optical signal, multiple third optical powers of multiple third optical signals, and downlink optical power received by multiple ONUs. The OLT determines the optical power loss in the network based on the first optical power, the second optical power, the multiple third optical powers, and the downlink optical power received by the multiple ONUs. The optical power loss in the network includes the optical power loss from the OLT to the ODN device, the optical power loss from the first optical port to the second and third optical ports, and the optical power loss between the third optical port and the multiple ONUs.

[0035] In this possible implementation, the OLT receives the first optical power, second optical power, and third optical power transmitted by the ODN device, as well as the downlink optical power received by multiple ONUs. The OLT can then determine the optical power loss based on this power information. The optical power loss includes the optical power loss from the OLT to the ODN device, the optical power loss from the first optical port to the second and third optical ports, and the optical power loss between the third optical port and the multiple ONUs.

[0036] In one possible implementation of the third aspect, the method further includes: the OLT receiving a first uplink optical signal transmitted by the ODN device. The first uplink optical signal carries network address information of multiple ONUs and multiple first downlink optical powers received by the multiple ONUs. The OLT determines a target ONU based on the multiple first downlink optical powers, the target ONU being the ONU with the lowest optical power among the multiple first downlink optical powers. The OLT sends a downlink optical signal to the target ONU, the downlink optical signal carrying an adjustment signal, so that the target ONU sends an electrical signal carrying the adjustment signal to the target ODN device. The adjustment signal instructs the target ODN device to adjust the adjustable splitter of the target ODN device to increase the optical power of the target third optical signal output from the target third opto-port. The target third opto-port and the target third optical signal correspond to the target ONU. The target ODN device is an ODN device connected to the target ONU or a higher-level ODN device above the ODN device.

[0037] In this possible implementation, the OLT adjusts the splitting ratio of the adjustable splitter by sending a downlink optical signal carrying an adjustment signal to the ODN device, thereby increasing the optical power of the downlink optical signal received by the target ONU. By performing this step multiple times, the power of the optical signals received by the multiple ONUs in the entire system becomes more balanced.

[0038] In one possible implementation of the third aspect, the method further includes: the OLT receiving a second uplink optical signal transmitted by the ODN device, the second uplink optical signal carrying network address information of multiple ONUs and a second downlink optical power received by the multiple ONUs. The OLT determines network topology information based on the first downlink optical power and the second downlink optical power, the network topology information including the hierarchical information of the ODN device.

[0039] In this possible implementation, the OLT receives a first uplink optical signal and a second uplink optical signal sent by the ODN device. The OLT can then determine the network topology information based on the network address information of multiple ONUs carried in the first and second uplink optical signals, the multiple first downlink optical powers received by the multiple ONUs, and the multiple second downlink optical powers received by the multiple ONUs. This network topology information includes the hierarchical information of the ODN device.

[0040] A fourth aspect of this application provides an optical distribution network (ODN) device. The ODN device includes a first optical splitter and a second optical splitter, wherein the second optical splitter is an equal-power optical splitter. The first optical splitter is used to divide the power of a first optical signal transmitted by an OLT into a second optical signal and a fourth optical signal. The second optical splitter is used to split the power of the fourth optical signal into multiple third optical signals of equal power. The second optical signal is used to transmit to the next-level ODN device, and the multiple third optical signals are used to transmit to corresponding multiple ONUs.

[0041] In this possible implementation, the power of the first optical signal is split into a second optical signal and multiple third optical signals using a first beam splitter and a second beam splitter. The optical power ratio of the second optical signal and the multiple third optical signals can be directly determined by the splitting ratio of the first beam splitter. The second beam splitter splits the power of the fourth optical signal into multiple third optical signals, thus providing multiple third optical signals with equal optical power to multiple ONUs simply and directly.

[0042] In one possible implementation of the fourth aspect, the first beam splitter is an adjustable beam splitter with an adjustable power splitting ratio.

[0043] In this possible implementation, the first beam splitter is an adjustable beam splitter, so the optical power ratio of the second optical signal and multiple third optical signals can be adjusted simply and efficiently by directly adjusting the splitting ratio of the first beam splitter.

[0044] A fifth aspect of this application provides a Passive Optical Network (PON) system. The PON system includes multiple ODN devices, multiple ONUs, and an OLT. The ODN devices have the structure described in the first aspect, and the multiple ODN devices, multiple ONUs, and OLTs are used to execute the signal processing methods described in the second to fourth aspects.

[0045] A sixth aspect of this application provides a signal processing method. This method is applied to the passive optical network (PON) system described in the fifth aspect above, and includes the signal processing method described in the second aspect for an ODN device and the signal processing method described in the third aspect for an OLT.

[0046] A seventh aspect of this application provides an OLT. The OLT includes a processor and an optical transceiver, which are connected to perform the method described in the second aspect or any specific implementation thereof. The optical transceiver is used to receive optical signals from external devices and / or transmit signals received from the processor.

[0047] As can be seen from the above technical solutions, the embodiments of this application have the following advantages: the ODN device transmits information such as the identification information and port identification information of multiple ONUs to the OLT, so that the OLT can determine the network topology information based on the identification information and port identification information of the multiple ONUs. The network topology information includes the correspondence between multiple ONUs and multiple third optoelectronic ports. Attached Figure Description

[0048] Figure 1 This is a network framework diagram of a passive optical network system.

[0049] Figure 2 This is a network framework diagram of a passive optical network system in an embodiment of this application;

[0050] Figure 3 This is a first structural schematic diagram of the ODN device in an embodiment of this application;

[0051] Figure 4 This is a schematic diagram of the second structure of the ODN device in the embodiments of this application;

[0052] Figure 5 This is a schematic diagram of a passive optical network system in one of the embodiments of this application;

[0053] Figure 6 This is a schematic diagram of the third structure of the ODN device in the embodiments of this application;

[0054] Figure 7 This is a first signaling flowchart of the signal processing method in the embodiments of this application;

[0055] Figure 8 This is a second signaling flowchart of the signal processing method in the embodiments of this application;

[0056] Figure 9 This is a third signaling flowchart of the signal processing method in the embodiments of this application;

[0057] Figure 10 This is a fourth signaling flowchart of the signal processing method in the embodiments of this application;

[0058] Figure 11 This is a fifth signaling flowchart of the signal processing method in the embodiments of this application;

[0059] Figure 12 This is the sixth signaling flowchart of the signal processing method in the embodiments of this application. Detailed Implementation

[0060] This application provides an optical distribution network device and a signal processing method for transmitting identification information and port identification information of multiple ONUs to an OLT via an ODN device. The identification information and port identification information of the multiple ONUs are used by the OLT to determine the network topology information of the PON system.

[0061] The embodiments of this application are described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. As those skilled in the art will recognize, with the development of technology and the emergence of new scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0062] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that these terms can be used interchangeably where appropriate so that the embodiments described herein can be implemented in a sequence other than that shown in the illustrations or descriptions. Furthermore, the term "comprising," and any variations thereof, is intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0063] Figure 1 This application provides a passive optical network (PON) system as an embodiment. Figure 1 As shown, in PON, the OLT (Optical Line Terminal) splits and transmits the downlink optical signal through the ODN (Optical Distribution Network) device, thereby transmitting a downlink optical signal to multiple optical network units (ONUs), thus achieving one-to-many optical interconnection. In PON, the ODN device includes multiple splitters, which split the optical signal power and transmit it through the optical cable using multiple splitters with fixed splitting ratios, transmitting the optical signal sent by one OLT to multiple ONUs.

[0064] Figure 2 A passive optical network (PON) system 200 is provided as an embodiment of this application. For example... Figure 2 As shown, the PON system 200 includes an optical line terminal (OLT) 201, multiple ODN devices 202, and multiple optical network units (ONUs) 203. The multiple ODN devices 202 are connected sequentially. The input of the first-level ODN device (i.e., the first ODN device) is connected to the output of the OLT, and the inputs of other-level ODN devices are connected to the inputs of the next-level ODN device. One of the multiple inputs of each ODN device is connected to the next-level ODN device, and the other output ports are connected to multiple ONUs 203.

[0065] Figure 3 This is a first structural schematic diagram of an optical distribution network (ODN) device 300 provided in an embodiment of this application. Embodiment 1: As shown... Figure 3 As shown in the embodiment of this application, the optical distribution network (ODN) device 300 includes a beam splitting module 301, a control chip 302, a first optical port 303, a second optical port 304, and a plurality of third optoelectronic composite ports 305. The beam splitting module 301 is connected to the control chip 302, the first optical port, the second optical port 304, and the plurality of third optoelectronic composite ports 305. The control chip 302 is connected to any one of the plurality of third optoelectronic composite ports 305.

[0066] The first optical port 303 is the input port. If the ODN is the highest-level ODN device, i.e., the first ODN device, then the first optical port 303 is used to connect to the Optical Line Terminal (OLT) to transmit optical signals between the ODN device 300 and the OLT. If the ODN is not the highest-level ODN device, then the first optical port 303 is used to connect to the next higher-level ODN device to transmit optical signals between the ODN and the next higher-level ODN device.

[0067] The second optical port 304 is one of the multiple output ports of the ODN device 300, used to connect to the next-level ODN device 300 and transmit optical signals between the ODN device 300 and the next-level ODN device.

[0068] Multiple third optoelectronic composite ports 305 are output ports of the ODN device 300, used to connect multiple ONUs and the control chip 302, transmitting optical signals between the ODN device 300 and the multiple ONUs, and electrical signals between the control chip 302 and the multiple ONUs. The third optoelectronic composite port is a port capable of simultaneously transmitting both optical and electrical signals.

[0069] The beam splitter module 301 is used to receive a first optical signal sent by the OLT through the first optical port 303, and split the first optical signal into a second optical signal and multiple third optical signals through power beam splitting. The second optical signal is used to transmit to the next-level ODN device through the second optical port 304. The multiple third optical signals are used to transmit to the corresponding multiple ONUs through multiple third optoelectronic composite ports 305.

[0070] In this embodiment, the OLT generates a downlink first optical signal and sends it to the first-stage ODN device. After receiving the first optical signal from the first optical port 303 (input interface), the first-stage ODN device uses the power splitting module 301 to divide the first optical signal into a second optical signal and multiple third optical signals. Then, the ODN device transmits the multiple third optical signals to the corresponding multiple ONUs through multiple third optoelectronic composite ports 305, and transmits the second optical signal to the next-stage ODN device through the second optical port 304. The next-stage ODN device continues to perform the above operations until the optical signal is transmitted to the last-stage ODN device.

[0071] The control chip 302 is used to process the electrical signals transmitted by multiple third optoelectronic composite ports 305. These electrical signals can be sent by multiple ONUs or sent by the control chip 302 to the ONUs.

[0072] In this embodiment, the ODN device 300 may further include a PCB circuit board. The control chip 302 is connected to multiple third optoelectronic composite ports 305 and a beam splitting module 301 via the PCB circuit board. The PCB circuit board is used to transmit electrical signals between the control chip 302 and the multiple third optoelectronic composite ports 305 and beam splitting module 301. Alternatively, in this embodiment, the control chip 302 may also be connected to the multiple third optoelectronic composite ports 305 and beam splitting module 301 in other ways, such as a control circuit capable of the above functions; specific methods are not limited here.

[0073] In one possible implementation, the PCB can also be used to process the electrical signals transmitted by the multiple third optoelectronic composite ports 305 and the beam splitting module 301, and then transmit them to the control chip 302.

[0074] The control chip 302 is used to control multiple third optoelectronic composite ports 305 to send multiple electrical signals carrying port identification information to corresponding multiple ONUs. The port identification information indicates the identification of the multiple third optoelectronic composite ports 305 of the ODN device 300.

[0075] Any one of the multiple ONUs is also used to record the port identification information and its own identifier after receiving an electrical signal carrying port identification information sent by the control chip 302. Since there is a one-to-one correspondence between the multiple ODNs and the multiple third optoelectronic composite ports 305 that send the port identification information, the ONU records the correspondence information between itself and the third optoelectronic composite port. This correspondence information can be multiple information pairs.

[0076] In one possible implementation, the control chip 302 can also be used to receive electrical signals carrying the identifiers of multiple ONUs from multiple third optoelectronic composite ports 305. After receiving the multiple electrical signals, the control chip 302 records the identifiers of the multiple ONUs and the corresponding port identification information of the third optoelectronic composite port transmitting the electrical signals. Since there is a one-to-one correspondence between the multiple ONUs and the multiple third optoelectronic composite ports 305 that transmit the port identification information, the control chip 302 records multiple correspondence information between the multiple ONUs and the multiple third optoelectronic composite ports 305. This multiple correspondence information can be multiple information pairs. Then, the control chip 302 sends electrical signals carrying the multiple correspondence information to the corresponding ONUs through the third optoelectronic composite ports.

[0077] In this embodiment, the correspondence information between multiple ONUs and multiple third optoelectronic composite ports 305 can be recorded in the control chip 302, or in multiple ONUs, or on both sides; no specific limitation is made here.

[0078] Multiple ONUs are also used to generate multiple uplink optical signals based on their own recorded correspondence information or the correspondence information sent by the control chip 302. These multiple uplink optical signals carry the identification information of the ONU that sent the uplink optical signal and the corresponding port identification information, i.e., the correspondence information, and send the uplink optical signal to the ODN device 300.

[0079] The ODN device 300 is also used to receive uplink optical signals from multiple corresponding ONUs from multiple third optoelectronic composite ports 305 via the beam splitter module 301 and transmit them to the OLT. The multiple uplink optical signals carry the identification information of the ONU that sent the uplink optical signals and the port identification information of the multiple third optoelectronic composite ports that transmitted the multiple uplink optical signals.

[0080] The OLT is also used to, after receiving the multiple uplink optical signals, determine network topology information based on the identification information of the ONU that transmits the uplink optical signals carried by the multiple uplink optical signals and the port identification information of the multiple third optoelectronic composite ports that transmit the multiple uplink optical signals. The network topology information includes the correspondence between the multiple ONUs and the multiple third optoelectronic composite ports 305.

[0081] In this embodiment, the identification information of the ONU can be the network address information of the ONU. For example, the MAC address or IP address of the ONU, or a configured number identifier or name identifier, etc., are not limited here.

[0082] Figure 4 This is a second structural schematic diagram of an optical distribution network (ODN) device 400 provided in an embodiment of this application. (See attached diagram.) Figure 4 As shown, the ODN device 400 in this embodiment further includes a first optical power monitor (MPD) 406, which is connected to a first optical port 403. The first MPD 406 is used to acquire the first optical power of the first optical signal and transmit it to a control chip 402. The control chip 402 is then used to control at least one of the plurality of third optoelectronic composite ports 405 to send at least one electrical signal carrying the first optical power to at least one of the plurality of ONUs. The at least one ONU, upon receiving the electrical signal carrying the first optical power, generates an uplink optical signal and sends it to the corresponding ODN device 400. The uplink optical signal of the at least one ONU carries the first optical power.

[0083] Then, the beam splitter module 401 of the ODN device 400 is further configured to: receive uplink optical signals from at least one ONU from multiple third optoelectronic composite ports 405 and transmit them to the OLT. The beam splitter module 401 is also configured to receive uplink optical signals from the next-level ODN device from the second optical port 404 and transmit them to the OLT. The uplink optical signal from the next-level ODN device carries the first optical power of the next-level ODN device.

[0084] In one possible implementation, the uplink optical signal of the at least one ONU also carries the optical power of the optical signal received by the ONU that sent the uplink optical signal, i.e., the received downlink optical power. The uplink optical signal of the next-level ODN device also carries the downlink optical power received by the multiple ONUs connected to the next-level ODN device.

[0085] In one possible implementation, such as Figure 2 As shown, if the next-level ODN device is also connected to other lower-level ODN devices, the next-level ODN device will also carry the uplink optical signal sent by the other lower-level ODN devices. The uplink optical signal sent by the other lower-level ODN devices carries the first optical power of the ODN device that sent the uplink optical signal and / or the downlink optical power received by the multiple ONUs connected to it.

[0086] The OLT is also used to determine network topology information based on the information carried by multiple uplink optical signals transmitted by the ODN device 400 after receiving such signals. This network topology information includes the hierarchical information of the multiple ODN devices 400 and the hierarchical information of the multiple ONUs. Specifically, during the transmission of the downlink optical signal in the PON, a portion of the optical signal is split and sent to the ONU after passing through each ODN device 400. Therefore, the first optical power of the first optical signal received by each ODN device 400 decreases progressively according to the hierarchical structure of the multiple ODN devices 400. Thus, after determining the optical power of the optical signal acquired by the first MPD 406, if the connection position of the first MPD 406 in each ODN device 400 is the same (i.e., it acquires the optical power of the same optical signal), the OLT can determine the PON network topology information based on the magnitude of the optical power of the multiple first MPD 406s. The network topology information includes the hierarchical information of the multiple ODN devices 400. The greater the optical power of the optical signal acquired by the first MPD 406, the higher the hierarchical level of the corresponding ODN device 400; conversely, the lower the optical power, the lower the hierarchical level of the corresponding ODN device 400.

[0087] Figure 5 This is a schematic diagram of a PON system provided in an embodiment of this application. Figure 5In the PON system 500, the splitting ratio of each ODN device is 4:1. The optical power of the optical signal received by the first ODN device 501 from the OLT 505 is 100dB. After splitting by the first ODN device 501, the optical power of the optical signal received by the second ODN device 502 is 80dB. After splitting by the second ODN device 502, the optical power of the optical signal received by the third ODN device 503 is 64dB. After splitting by the third ODN device 503, the optical power of the optical signal received by the fourth ODN device 504 is 51.2dB. After the OLT obtains the first optical power of each ODN device, it can determine the level of each ODN device according to the first optical power of each ODN device. According to the first optical power of each ODN device decreasing according to the level, the levels of these four ODN devices can be determined as follows: first ODN device 501, second ODN device 502, third ODN device 503, and fourth ODN device 504.

[0088] In this embodiment, the beam splitting module 401 includes a first beam splitter and a second beam splitter. A first MPD 406 can be connected to the input port of the first beam splitter to acquire the optical power of a first optical signal. In addition, it can be connected to other ports in the beam splitter group to acquire the optical power of other optical signals. For example, the first MPD 406 can be connected to the first output port of the first beam splitter to acquire the optical power of a second optical signal. The first MPD 406 can also be connected to the second output port of the first beam splitter to acquire the optical power of the optical signals split by the beam splitter group to multiple ONUs, i.e., the sum of the optical power of multiple third optical signals; the specific details are not limited here.

[0089] In this embodiment, the ODN device 400 transmits its own first optical power, the first optical power of the next-level ODN device, the downlink optical power received by the multiple ONUs connected to the ODN device 400, and the downlink optical power received by the multiple ONUs connected to the next-level ODN to the OLT. This allows the OLT to determine network topology information based on this power information. The network topology information also includes the hierarchical information of the ODN device 400 and the hierarchical information of the multiple ONUs.

[0090] like Figure 4 As shown, the ODN device 400 further includes a second MPD 407 and a third MPD 408. The second MPD 407 is connected to the second optical port 404, and the third MPD 408 is connected to multiple third optical ports. The second MPD 407 is used to acquire the second optical power of the second optical signal and transmit the second optical power to the control chip 402. The third MPD 408 is used to acquire the third optical power of multiple third optical signals and transmit the third optical power to the control chip 402.

[0091] The control chip 402 is also configured to, upon receiving the second optical power and the third optical power, control at least one of the plurality of third optoelectronic composite ports 405 to send at least one electrical signal carrying the second optical power and the third optical power to at least one of the plurality of ONUs, wherein the at least one third optoelectronic composite port corresponds to the at least one ONU.

[0092] The at least one ONU is also used to generate an uplink optical signal and send it to the ODN device 400 after receiving an electrical signal carrying a second optical power and a third optical power. The uplink optical signal carries a first optical power, a second optical power, a third optical power, and downlink optical power received by multiple ONUs.

[0093] The beam splitter module 401 is also used to: receive uplink optical signals from at least one corresponding ONU from multiple third optoelectronic composite ports 405 and transmit them to the OLT. The uplink optical signal carries a first optical power, a second optical power, a third optical power, and downlink optical power received by multiple ONUs.

[0094] The OLT is also used to receive the uplink optical signal and determine the optical power loss based on the first optical power, second optical power, third optical power carried by the uplink optical signal and the downlink optical power received by the multiple ONUs. The optical power loss includes the optical power loss from the OLT to the ODN device 400, the optical power loss from the first optical port 403 to the second optical port 404 and the third optical port, and the optical power loss between the third optical port and the multiple ONUs.

[0095] In one possible implementation, the ODN device 400 further includes a first filter 409, a second filter 410, and a third filter 411. The first MPD 406 is connected to the beam splitter 401 via the first filter. The second MPD is connected to the beam splitter 401 via the second filter 410. The third MPD is connected to the beam splitter 401 via the third filter 411. The first filter 409 filters the optical signal received by the first MPD 406. The second filter 410 filters the optical signal received by the second MPD 407. The third filter 411 filters the optical signal received by the third MPD 408. This ensures that the first MPD 406, second MPD 407, and third MPD 408 receive only downlink optical signals or only uplink optical signals, thereby obtaining more accurate optical power.

[0096] In this embodiment, a filter is added before the MPD to filter the optical signal received by the MPD, improving the accuracy of the optical power acquired by the MPD. For MPDs (i.e., third MPDs) connected to multiple third optoelectronic composite ports of the beam splitter module, when the third filter is used to enable the third MPD to receive downlink optical signals, the number of third MPDs needs to be equal to and correspond one-to-one with the number of multiple third optoelectronic composite ports. When the third filter is used to enable the third MPD to receive uplink optical signals, the multiple third optoelectronic composite ports of the beam splitter module can share an MPD, and the number of third MPDs does not need to correspond to the output ports of the beam splitter module. For example, multiple third optoelectronic composite ports can share a single MPD to acquire the power of the uplink optical signal, thereby reducing the number of MPDs, lowering implementation costs, and reducing system complexity.

[0097] In this embodiment, the ODN device 400 also sends the first optical power, the second optical power, the third optical power, and the downlink optical power received by the multiple ONUs to the OLT, so that the OLT can determine the optical power loss based on this power information. The optical power loss includes the optical power loss from the OLT to the ODN device 400, the optical power loss from the first optical port 403 to the second optical port 404 and the third optical port, and the optical power loss from the third optical port to the multiple ONUs.

[0098] Figure 6 This is a third structural schematic diagram of an optical distribution network (ODN) device 600 provided in an embodiment of this application. Embodiment Three: Figure 6 As shown, the beam splitting module 601 in the ODN device 600 includes a first beam splitter 606 and a second beam splitter 607, with the output port of the first beam splitter 606 connected to the input port of the second beam splitter 607. The second beam splitter 607 is an equal-power beam splitter that splits the input optical signal power into multiple output optical signals of equal power. The first beam splitter 606 is used to split the first optical signal power into a second optical signal and a fourth optical signal. The second beam splitter 607 is used to split the fourth optical signal power into multiple third optical signals.

[0099] In one possible implementation, the first beam splitter 606 is an adjustable beam splitter. An adjustable beam splitter means that the power splitting ratio of the beam splitter can be adjusted, for example, from 9:1 to 8:2.

[0100] When the first optical splitter 606 is an adjustable optical splitter, the multiple ONUs are further configured to generate a first uplink optical signal after receiving the downlink optical signal sent by the OLT. The first uplink optical signal carries the network address information of the multiple ONUs and the multiple first downlink optical powers received by the multiple ONUs. The optical splitting module 601 is further configured to receive the first uplink optical signals sent by the multiple ONUs and transmit the first uplink optical signals to the OLT through the first optical port 603. The OLT is further configured to receive the multiple first uplink optical signals transmitted by the ODN device 600 and determine the target ONU based on the multiple first downlink optical powers carried by the multiple first uplink optical signals. The target ONU is the ONU corresponding to the downlink optical power with the smallest value among the multiple first downlink optical powers.

[0101] The OLT is also used to generate a downlink optical signal and send it to the ODN device 600, which instructs the ODN device 600 to transmit the downlink optical signal to the target ONU. This downlink optical signal carries an adjustment signal that instructs the ODN device 600 to adjust the adjustable splitter to increase the optical power of the target third optical signal output from the target third opto-port. The target third opto-port and the target third optical signal correspond to the target ONU.

[0102] The ODN device 600 is also used to receive downlink optical signals carrying modulation signals and transmit them to the target ONU.

[0103] The target ONU is used to receive the downlink optical signal carrying the modulation signal transmitted by the ODN device 600, and generate an electrical signal carrying the modulation signal and send it to the ODN device 600.

[0104] The ODN device 600 is also used to receive an electrical signal carrying an adjustment signal sent by the target ONU, and adjust the adjustable beam splitter according to the indication of the adjustment signal to increase the optical power of the target third optical signal output from the target third photoelectric port. The target third photoelectric port and the target third optical signal correspond to the target ONU.

[0105] In this embodiment, the optical power of the downlink optical signal received by the target ONU is increased by adjusting the power splitting ratio and the beam splitting ratio of the adjustable beam splitter. Through repeated execution, the power of the optical signals received by the multiple ONUs in the entire system becomes more balanced.

[0106] In this embodiment, after the ODN device adjusts the splitting ratio of the adjustable splitter and sends the adjusted third optical signals to the corresponding ONUs, the ONUs are further configured to generate multiple second uplink optical signals and transmit them to the ODN device 600. These second uplink optical signals carry the network address information of the multiple ONUs and the second downlink optical power received by the multiple ONUs. The second downlink optical power is the power of the downlink optical signals received by the multiple ONUs after the ODN device adjusts the splitting ratio of the adjustable splitter.

[0107] The ODN device 600 is also used to receive a second uplink optical signal sent by multiple ONUs and transmit the second uplink optical signal to the OLT.

[0108] The OLT is also used to receive a second uplink optical signal carrying network address information of multiple ONUs and the second downlink optical power received by the multiple ONUs, and to determine network topology information based on the first uplink optical signal and the second uplink optical signal. The network topology information also includes the hierarchical information of the ODN device 600.

[0109] In this possible implementation, the ODN device 600 transmits the first uplink optical signal and the second uplink optical signal to the OLT. This allows the OLT to determine the network topology information based on the network address information of multiple ONUs carried in the first and second uplink optical signals, the multiple first downlink optical powers received by the multiple ONUs, and the multiple second downlink optical powers received by the multiple ONUs. This network topology information includes the hierarchical information of the ODN device 600.

[0110] In this embodiment, the ODN device transmits information such as the identification information, port identification information, first optical power, second optical power, third optical power, and downlink optical power received by multiple ONUs to the OLT via uplink optical signals. This allows the OLT to determine network topology information and power loss information within the network. The network topology information includes the correspondence between multiple ONUs and multiple third optical ports, the hierarchical information of the ODN device, and the hierarchical information of the multiple ONUs. On one hand, by determining this network topology information, the OLT can not only perceive the network topology and device connection status of the entire PON network, facilitating better adjustment of optical signal transmission power distribution and reducing power waste, but also identify the specific fault node when an optical signal transmission failure occurs in the network, facilitating repair. On the other hand, when the ODN device includes an adjustable splitter, adjusting the adjustable splitter can further balance the power of the optical signals received by the multiple ONUs, reducing optical signal power waste.

[0111] Based on the above PON system, the signal processing method in the embodiments of this application is described below.

[0112] Figure 7 This is a flowchart of a signal processing method in an embodiment of this application. For example... Figure 7 As shown, the method flow includes the following multiple steps.

[0113] 701. The Optical Line Terminal (OLT) sends a first optical signal to the ODN device, and the ODN device receives the first optical signal sent by the OLT accordingly.

[0114] 702. The ODN device splits the power of the first optical signal into a second optical signal and multiple third optical signals.

[0115] 703. The ODN device transmits the second optical signal to the next-level ODN device and transmits multiple third optical signals to the corresponding multiple ONUs respectively.

[0116] 704. The ODN device sends multiple electrical signals carrying port identification information to the corresponding multiple ONUs. The port identification information indicates the identification of multiple third optoelectronic composite ports.

[0117] 705. The ODN device receives uplink optical signals from multiple ONUs and transmits them to the OLT. The uplink optical signal carries the identification information of the ONU that sent the uplink optical signal and the port identification information of the multiple third optoelectronic composite ports that transmit the uplink optical signal.

[0118] 706. The OLT receives the uplink optical signal and determines the network topology information based on the uplink optical signal. The network topology information includes the correspondence between multiple ONUs and multiple third optoelectronic ports.

[0119] In this embodiment, the signal processing method is implemented by the OLT, multiple ODN devices, and multiple ONUs as described in Embodiment 1, performing corresponding steps. See details for further information. Figure 3 The relevant descriptions of the embodiments shown will not be repeated here.

[0120] Figure 8 This is a flowchart of a signal processing method in an embodiment of this application. For example... Figure 8 As shown, the method flow includes the following multiple steps.

[0121] 801. The ODN device determines the first optical power of the first optical signal through the first MPD.

[0122] 802. The ODN device sends at least one electrical signal carrying the first optical power to at least one ONU among a plurality of ONUs, and the at least one ONU receives the electrical signal carrying the first optical power.

[0123] 803. At least one ONU generates an uplink optical signal and sends it to the ODN device, the uplink optical signal carrying a first optical power.

[0124] In one possible implementation, the uplink optical signal transmitted by the at least one ONU also carries the downlink optical power received by the at least one ONU.

[0125] 804. The ODN device receives the uplink optical signal from at least one ONU and transmits it to the OLT.

[0126] 805. The ODN device receives the uplink optical signal from the next-level ODN device and transmits it to the OLT. The uplink optical signal carries the first optical power of the next-level ODN device.

[0127] In one possible implementation, the uplink optical signal transmitted by the next-level ODN device also carries the downlink optical power received by multiple ONUs connected to the next-level ODN device.

[0128] 806. The OLT determines the network topology information based on the uplink optical signal of at least one ONU and the uplink optical signal of the next-level ODN device. This network topology information includes the hierarchical information of multiple ODN devices in the PON network and the hierarchical information of multiple ONUs.

[0129] In this embodiment, the signal processing method is implemented by the OLT, multiple ODN devices, and multiple ONUs as described in Embodiment 2, performing corresponding steps. See details for further information. Figure 4 The relevant descriptions of the embodiments shown will not be repeated here.

[0130] Figure 9 This is a flowchart of a signal processing method in an embodiment of this application. For example... Figure 9 As shown, the method flow includes the following multiple steps.

[0131] 901. The ODN device acquires the second optical power of the second optical signal and the third optical power of multiple third optical signals.

[0132] 902. The ODN device sends multiple electrical signals carrying second and third optical power to multiple ONUs respectively.

[0133] 903. Multiple ONUs generate multiple uplink optical signals and transmit them to the ODN device. The uplink optical signals carry indications of the first optical power, the second optical power, the third optical power, and the downlink optical power received by the multiple ONUs.

[0134] 904. The ODN device receives the uplink optical signals from the corresponding multiple ONUs and transmits them to the OLT.

[0135] 905. The OLT receives the multiple uplink optical signals and determines the optical power loss based on the information carried by the uplink optical signals. The multiple uplink optical signals carry a first optical power, a second optical power, a third optical power, and the downlink optical power received by the multiple ONUs. The optical power loss includes the optical power loss from the OLT to the ODN device, the optical power loss from the first optical port to the second optical port and the third optical port, and the optical power loss between the third optical port and the multiple ONUs.

[0136] In this embodiment, the signal processing method is implemented by the OLT, multiple ODN devices, and multiple ONUs as described in Embodiment 2, specifically by performing corresponding steps. Figure 4 The relevant descriptions of the embodiments shown will not be repeated here.

[0137] Figure 10 This is a flowchart of a signal processing method in an embodiment of this application. The aforementioned ODN device includes a first beam splitter and an equal-splitting beam splitter, such as... Figure 10 As shown, the method flow includes the following multiple steps.

[0138] 1001. The ODN device splits the power of the first optical signal into a second optical signal and a fourth optical signal through the first optical splitter;

[0139] 1002. The ODN device uses an equal-power beam splitter to split the power of the fourth optical signal into multiple third optical signals with equal power.

[0140] In this embodiment, the signal processing method is implemented by the ODN device in Embodiment 3, which performs the corresponding steps. For details, please refer to... Figure 6 The corresponding functions of the ODN device in Embodiment 3 shown will not be repeated here.

[0141] Figure 11 This is a flowchart of a signal processing method in an embodiment of this application. The first beam splitter mentioned above is a beam splitter with adjustable power beam splitting ratio, such as... Figure 11 As shown, the method flow includes the following multiple steps.

[0142] 1101. Multiple ONUs generate a first uplink optical signal, which carries the network address information of the multiple ONUs and the multiple first downlink optical powers received by the multiple ONUs.

[0143] 1102. The ODN device receives multiple first uplink optical signals sent by multiple ONUs and transmits the first uplink optical signals to the OLT through the first optical port.

[0144] 1103. The OLT receives multiple first uplink optical signals transmitted by the ODN device and determines the target ONU based on the multiple first downlink optical powers carried by the multiple first uplink optical signals. The target ONU is the ONU corresponding to the downlink optical power with the smallest value among the multiple first downlink optical powers.

[0145] 1104. The OLT generates a downlink optical signal and sends it to the ODN device. This downlink optical signal instructs the ODN device to transmit the downlink optical signal to the target ONU. This downlink optical signal carries a modulation signal, which instructs the target ONU to send this modulation signal to the ODN device to increase the optical power of the target third optical signal output from the target third opto-port by adjusting the adjustable beam splitter. The target third opto-port and the target third optical signal correspond to the target ONU.

[0146] 1105. The ODN device receives the downlink optical signal sent by the OLT and sends the downlink optical signal to the target ONU indicated by the downlink optical signal.

[0147] 1106. The target ONU receives the downlink optical signal carrying the modulation signal transmitted by the ODN device, and generates an electrical signal carrying the modulation signal and sends it to the ODN device.

[0148] 1107. The ODN device receives an electrical signal carrying an adjustment signal from the target ONU and adjusts the adjustable beam splitter according to the indication of the adjustment signal to increase the optical power of the target third optical signal output from the target third photoelectric port. The target third photoelectric port and the target third optical signal correspond to the target ONU.

[0149] In this embodiment, the signal processing method is implemented by the OLT, multiple ODN devices, and multiple ONUs as described in Embodiment 3, and specific implementation details can be found in the following reference. Figure 6 The relevant description of Embodiment 3 shown will not be repeated here.

[0150] Figure 12 This is a flowchart of a signal processing method in an embodiment of this application. The first beam splitter is a beam splitter with adjustable power splitting ratio. After the first beam splitter increases the output of the third optical signal to the target ONU, as follows... Figure 12 As shown, the method flow includes the following multiple steps.

[0151] 1201. Multiple ONUs generate multiple second uplink optical signals and transmit them to the ODN device. These second uplink optical signals carry the network address information of the multiple ONUs and the second downlink optical power received by the multiple ONUs. The second downlink optical power is the power of the downlink optical signals received by the multiple ONUs after the ODN device adjusts the splitting ratio of the adjustable splitter.

[0152] 1202. The ODN device receives the second uplink optical signal sent by multiple ONUs and transmits the second uplink optical signal to the OLT.

[0153] 1203. The OLT receives a second uplink optical signal carrying network address information of multiple ONUs and the second downlink optical power received by multiple ONUs, and determines network topology information based on the first uplink optical signal and the second uplink optical signal. The network topology information also includes the hierarchical information of the ODN device.

[0154] In this embodiment, the signal processing method is implemented by the OLT, multiple ODN devices, and multiple ONUs as described in Embodiment 3, and can be found in the following details. Figure 6 The relevant description of Embodiment 3 shown will not be repeated here.

[0155] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0156] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed between each other can be indirect coupling or communication connection through some interfaces, apparatuses, or units, and can be electrical, mechanical, or other forms. Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0157] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0158] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

Claims

1. An optical distribution network (ODN) device, characterized in that, The ODN device includes a beam splitting module, a control chip, a first optical port, a second optical port, and multiple third optoelectronic composite ports. The beam splitting module is connected to the control chip, the first optical port, the second optical port, and the multiple third optoelectronic composite ports, wherein: The first optical port is used to connect to the optical line terminal (OLT). The second optical port is used to connect to the next-level ODN device; The plurality of third optoelectronic composite ports are used to connect to multiple ONUs, and the third optoelectronic composite ports are used to transmit optical signals and electrical signals; The control chip is used to control the plurality of third optoelectronic composite ports to send a plurality of electrical signals carrying port identification information to the corresponding plurality of ONUs, wherein the port identification information indicates the identification of the plurality of third optoelectronic composite ports; The beam splitting module is used to split the power of the first optical signal sent by the OLT into a second optical signal and multiple third optical signals. The second optical signal is used to transmit to the next-level ODN device, and the multiple third optical signals are used to transmit to the multiple ONUs. The beam splitter module is further configured to receive uplink optical signals from the corresponding ONUs from the plurality of third optoelectronic composite ports and transmit them to the OLT. The uplink optical signals carry identification information of the ONU that sends the uplink optical signals and port identification information of the corresponding third optoelectronic composite port that transmits the uplink optical signals.

2. The ODN device according to claim 1, characterized in that, The ODN device further includes a first optical power monitor (MPD), which is connected to the first optical port. The first optical power monitor (MPD) is used to acquire the first optical power of the first optical signal and transmit the first optical power to the control chip. The control chip is also used to control at least one of the plurality of third optoelectronic composite ports to send at least one electrical signal carrying the first optical power to at least one of the plurality of ONUs, wherein the at least one third optoelectronic composite port corresponds to the at least one ONU; The optical splitter module is further configured to receive the uplink optical signal from the at least one ONU and transmit it to the OLT, wherein the uplink optical signal from the at least one ONU carries the first optical power; The optical splitter module is also used to receive uplink optical signals from the next-level ODN device from the second optical port and transmit them to the OLT, wherein the uplink optical signals of the next-level ODN device carry the first optical power of the next-level ODN device.

3. The ODN device according to claim 2, characterized in that, The uplink optical signal of the at least one ONU also carries the downlink optical power received by the at least one ONU, and the uplink optical signal of the next-level ODN device also carries the downlink optical power received by the multiple ONUs connected to the next-level ODN device.

4. The ODN device according to claim 3, characterized in that, The ODN device further includes a second optical power monitor (MPD) and a third optical power monitor (MPD). The second optical power monitor (MPD) is connected to the second optical port, and the third optical power monitor (MPD) is connected to the plurality of third optoelectronic composite ports. The second optical power monitor (MPD) is used to acquire the second optical power of the second optical signal and transmit the second optical power to the control chip. The third optical power monitor (MPD) is used to: acquire the third optical power of the plurality of third optical signals and transmit the third optical power to the control chip; The control chip is also used to control at least one of the plurality of third optoelectronic composite ports to send at least one electrical signal carrying the second optical power and the third optical power to at least one of the plurality of ONUs, wherein the at least one third optoelectronic composite port corresponds to the at least one ONU; The optical splitter module is further configured to: receive uplink optical signals from at least one ONU and transmit them to the OLT, wherein the uplink optical signals carry the first optical power, the second optical power, the third optical power, and the downlink optical power received by the plurality of ONUs.

5. The ODN device according to claim 4, characterized in that, The ODN device further includes a first filter, a second filter, and a third filter. The first optical power monitor (MPD) is connected to the beam splitting module through the first filter, the second optical power monitor (MPD) is connected to the beam splitting module through the second filter, and the third optical power monitor (MPD) is connected to the beam splitting module through the third filter. The first filter is used to filter the optical signal received by the first optical power monitor (MPD). The second filter is used to filter the optical signal received by the second optical power monitor (MPD). The third filter is used to filter the optical signal received by the third optical power monitor (MPD).

6. The ODN device according to any one of claims 1 to 5, characterized in that, The beam splitting module includes a first beam splitter and an equal beam splitter. The output port of the first beam splitter is connected to the input port of the equal beam splitter. The equal beam splitter is a beam splitter that splits the input optical signal power into multiple output optical signals with equal optical power. The first beam splitter is used to split the power of the first optical signal into the second optical signal and the fourth optical signal; The equal-division beam splitter is used to split the power of the fourth optical signal into the plurality of third optical signals.

7. The ODN device according to claim 6, characterized in that, The first beam splitter is an adjustable beam splitter.

8. A signal processing method, characterized in that, The method includes: The ODN device receives the first optical signal sent by the optical line terminal (OLT); The ODN device splits the power of the first optical signal into a second optical signal and multiple third optical signals; The ODN device transmits the second optical signal to the next-level ODN device, and transmits the multiple third optical signals to the corresponding multiple ONUs respectively. The multiple third optoelectronic composite ports of the ODN device are used to connect the multiple ONUs. The ODN device sends multiple electrical signals carrying port identification information to the corresponding multiple ONUs, wherein the port identification information indicates the identification of the multiple third optoelectronic composite ports; The ODN device receives uplink optical signals from the plurality of ONUs and transmits them to the OLT. The uplink optical signals carry the identification information of the ONU that sends the uplink optical signals and the port identification information of the corresponding third optoelectronic composite port that transmits the uplink optical signals. The uplink optical signals are used to determine network topology information, which includes the correspondence between the plurality of ONUs and the plurality of third optoelectronic composite ports.

9. The method according to claim 8, characterized in that, The method further includes: The ODN device acquires the first optical power of the first optical signal; The ODN device sends at least one electrical signal carrying the first optical power to at least one of the plurality of ONUs; The ODN device receives the uplink optical signal from at least one ONU and transmits it to the OLT, wherein the uplink optical signal from at least one ONU carries the first optical power; The ODN device receives the uplink optical signal from the next-level ODN device and transmits it to the OLT. The uplink optical signal from the next-level ODN device carries the first optical power of the next-level ODN device. The uplink optical signals of at least one ONU and the uplink optical signals of the next-level ODN device are used to determine network topology information. The network topology information includes the hierarchical information of the ODN device and the hierarchical information of the plurality of ONUs.

10. The method according to claim 9, characterized in that, The uplink optical signal of the at least one ONU also carries the downlink optical power received by the at least one ONU, and the uplink optical signal of the next-level ODN device also carries the downlink optical power received by the multiple ONUs connected to the next-level ODN device.

11. The method according to claim 10, characterized in that, The first optical port of the ODN device is used to connect to the OLT, and the second optical port of the ODN device is used to connect to the next-level ODN device. The method further includes: The ODN device acquires the second optical power of the second optical signal; The ODN device acquires the third optical power of the plurality of third optical signals; The ODN device sends at least one electrical signal carrying the second optical power and the third optical power to at least one of the plurality of ONUs; The ODN device receives uplink optical signals from at least one ONU and transmits them to the OLT. The uplink optical signals carry indications of the first optical power, the second optical power, the third optical power, and the downlink optical power received by the plurality of ONUs. The uplink optical signals are used to determine optical power loss, which includes optical power loss from the OLT to the ODN device, optical power loss from the first optical port to the second optical port and the third optoelectronic composite port, and optical power loss from the third optoelectronic composite port to the plurality of ONUs.

12. The method according to any one of claims 8 to 11, characterized in that, The ODN device includes a first beam splitter and an equal-width beam splitter. The ODN device splits the power of the first optical signal into a second optical signal and multiple third optical signals, including: The ODN device splits the power of the first optical signal into the second optical signal and the fourth optical signal through the first beam splitter; The ODN device uses an equal-power beam splitter to split the fourth optical signal power into multiple third optical signals with equal power.

13. The method according to claim 12, characterized in that, The first beam splitter is a beam splitter with adjustable power splitting ratio, and the method further includes: The ODN device receives the first uplink optical signal sent by the plurality of ONUs and transmits the first uplink optical signal to the OLT through the first optical port. The first uplink optical signal carries the network address information of the plurality of ONUs and the plurality of first downlink optical powers received by the plurality of ONUs. The ODN device receives the downlink optical signal sent by the OLT and sends the downlink optical signal to the target ONU indicated by the downlink optical signal. The downlink optical signal carries an adjustment signal, and the target ONU is the ONU with the lowest first downlink optical power among the plurality of ONUs determined by the OLT. The ODN device receives an electrical signal carrying the adjustment signal sent by the target ONU. The adjustment signal instructs the ODN device to adjust the adjustable beam splitter to increase the optical power of the target third optical signal output by the target third optoelectronic composite port. The target third optoelectronic composite port and the target third optical signal correspond to the target ONU.

14. The method according to claim 13, characterized in that, The method further includes: The ODN device receives the second uplink optical signal sent by the plurality of ONUs and transmits the second uplink optical signal to the OLT. The second uplink optical signal carries the network address information of the plurality of ONUs and the second downlink optical power received by the plurality of ONUs. The first uplink optical signal and the second uplink optical signal are used to determine the network topology information. The network topology information also includes the hierarchical information of the ODN device.

15. A signal processing method, characterized in that, The method includes: The OLT sends the first optical signal to the optical distribution network (ODN) device; The OLT receives multiple uplink optical signals transmitted by multiple ONUs from the ODN device. The multiple uplink optical signals carry port identification information and corresponding network address information of multiple ONUs. The port identification information indicates the identification of multiple third optoelectronic composite ports connected to the ODN device and the multiple ONUs. The electrical signal carrying the port identification information is transmitted by the ODN device to the multiple ONUs through the multiple third optoelectronic composite ports. The OLT determines network topology information based on the port identification information and the multiple network address information, wherein the network topology information includes the corresponding information of the multiple ONUs and the multiple third optoelectronic composite ports; The OLT sends a downlink optical signal to the ODN device. The downlink optical signal carries an adjustment signal, which is used to instruct the ODN device to increase the optical power of the target third optical signal output from the target third optoelectronic composite port. The target third optoelectronic composite port corresponds to the target ONU. The target ONU is the ONU with the lowest first downlink optical power among the plurality of ONUs determined by the OLT.

16. The method according to claim 15, characterized in that, The method further includes: The OLT receives the uplink optical signal transmitted by the ODN device. The uplink optical signal carries the first optical power of the ODN device and also carries the first optical power of at least one downstream ODN device of the ODN device. The OLT determines network topology information based on the information carried by the uplink optical signal. The network topology information includes the hierarchical information of the ODN device, the hierarchical information of the at least one lower-level ODN device, and the hierarchical information of the corresponding multiple ONUs. The higher the first optical power and / or the downlink optical power received by the multiple ONUs, the higher the hierarchical level of the corresponding ODN device.

17. The method according to claim 16, characterized in that, The uplink optical signal also carries the downlink optical power received by the plurality of ONUs and the downlink optical power received by the plurality of ONUs connected to the at least one lower-level ODN device.

18. The method according to claim 17, characterized in that, The first optical port of the ODN device is used to connect to the OLT, and the second optical port of the ODN device is used to connect to the next-level ODN device. The method further includes: The OLT receives the uplink optical signal transmitted by the ODN device. The uplink optical signal carries information about the first optical power of the first optical signal, the second optical power of the second optical signal, the third optical power of multiple third optical signals, and the downlink optical power received by the multiple ONUs. The OLT determines the optical power loss in the network based on the first optical power, the second optical power, the plurality of third optical powers, and the downlink optical power received by the plurality of ONUs. The optical power loss in the network includes the optical power loss from the OLT to the ODN device, the optical power loss from the first optical port to the second optical port and the third optoelectronic composite port, and the optical power loss between the third optoelectronic composite port and the plurality of ONUs.

19. A passive optical network (PON) system, characterized in that, The PON network system includes an ODN device as described in any one of claims 1 to 7, a plurality of ONUs, an OLT, and a next-level ODN device. The OLT is connected to a first optical port of the ODN device, the plurality of ONUs are connected to a plurality of third optoelectronic composite ports of the ODN device, and the next-level ODN device is connected to a second optical port of the ODN device.

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