CN115378539A

CN115378539A - Processing device, optical communication system and method, processing chip and storage medium

Info

Publication number: CN115378539A
Application number: CN202110554200.1A
Authority: CN
Inventors: 余毅; 黄远达; 李良川
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2022-11-22
Also published as: WO2022242171A1

Abstract

The application relates to the technical field of optical communication, and discloses a processing device, an optical communication system and method, a processing chip and a storage medium, which are used for reducing network delay in the optical communication system and improving the real-time performance of communication. The device includes: a plurality of optical receivers, processing units and optical transmitters; the plurality of optical receivers are used for respectively receiving first uplink optical signals sent by one or more terminal devices and performing photoelectric conversion on the first uplink optical signals to obtain a plurality of paths of uplink electrical signals; the processing unit is configured to receive the multiple uplink electrical signals sent by the multiple optical receivers, and multiplex the multiple uplink electrical signals to generate an uplink combined data frame; the optical transmitter is configured to perform electro-optical conversion on the uplink combined data frame generated by the processing unit to obtain a second uplink optical signal, and send the second uplink optical signal to a sink node.

Description

Processing device, optical communication system and method, processing chip and storage medium

Technical Field

The embodiment of the present application relates to the technical field of optical communication, and in particular, to a processing device, an optical communication system and method, a processing chip, and a storage medium.

Background

Optical communication has good transmission characteristics, such as good security, high capacity, high speed, etc., and thus is increasingly widely used. At present, the most common architecture in optical communication is a point-to-multipoint optical communication system, that is, a plurality of terminal devices may be connected to a sink node, and an optical splitter may be used between the sink node and the plurality of terminal devices to flexibly form a tree-type topology, a star-type topology, or other topologies. Point-to-multipoint optical communication systems have been widely used in internet access services such as home broadband.

In a point-to-multipoint optical communication system, a convergence node and a plurality of terminal devices adopt a passive optical network technology to realize optical fiber transmission and access. The passive optical network technology is adopted to perform downlink communication, a broadcast mode is adopted, and a Time Division Multiple Access (TDMA) technology is adopted to perform uplink communication. However, with the TDMA technique adopted for uplink communication, a plurality of terminal devices share a transmission medium, and the plurality of terminal devices can transmit signals in different time slots, so that each terminal device needs to wait for a period of time for the next signal transmission after transmitting a signal. Therefore, the method has certain network delay and jitter, and the real-time performance of communication is poor.

Disclosure of Invention

The embodiment of the application provides a processing device, an optical communication system and method, a processing chip and a storage medium, which are used for solving the problems that a point-to-multipoint optical communication system adopted in the prior art has certain network delay and jitter and the real-time performance of communication is poor.

The embodiment of the application provides the following specific technical scheme:

in a first aspect, an embodiment of the present application provides a processing apparatus, including: a plurality of optical receivers, processing units and optical transmitters; the multiple optical receivers are used for respectively receiving first uplink optical signals sent by one or more terminal devices and performing photoelectric conversion on the first uplink optical signals to obtain multiple paths of uplink electrical signals; the processing unit is configured to receive the multiple uplink electrical signals sent by the multiple optical receivers, and multiplex the multiple uplink electrical signals to generate an uplink combined data frame; and the optical transmitter is configured to perform electro-optical conversion on the uplink combined data frame generated by the processing unit to obtain a second uplink optical signal, and send the second uplink optical signal to a sink node.

Through the point-to-multipoint optical communication system provided by the application, compared with the framework that the sink node and the terminal equipment are connected through the optical splitter in the prior art, the point-to-multipoint optical communication system can realize that each terminal equipment continuously sends the uplink optical signal, thereby compared with the mode that a plurality of terminal equipment adopted in the prior art send the uplink optical signal under the TDMA framework, the waiting time can be reduced, the communication time delay is reduced, and the real-time performance of communication can be improved. Moreover, by the optical communication system structure provided by the application, transmission media used by a plurality of terminal devices for sending uplink optical signals can be separated, and compared with a mode of sharing the transmission media in the prior art, the problem of wavelength conflict in the multi-path uplink optical signals received by the sink node can be avoided, and the reliability of uplink communication is improved; the problem of delay jitter caused by uplink communication in a burst mode can also be avoided. In addition, because the burst mode is adopted for uplink communication in the prior art, under the scene that new terminal equipment performs online registration, the windowing time needs to be waited, that is, the time slots for uplink communication are not required for the registered terminal equipment, so that the registration efficiency is low.

In one possible design, the processing unit specifically includes: a plurality of clock recovery units, a distributor, a plurality of encoders, and a coupler; the plurality of clock recovery units are configured to perform clock signal recovery on the uplink electrical signals sent by the plurality of optical receivers, respectively, to obtain a plurality of clock signals, where the clock signals are used to indicate a transmission rate of the uplink electrical signals; the uplink electric signal is output to an encoder connected with the clock recovery unit; the distributor is configured to distribute a corresponding interleaved code to each terminal device according to a target rate and the plurality of clock signals to obtain a distribution result, so that each terminal device uses the corresponding interleaved code to carry an uplink electrical signal of the terminal device; the plurality of encoders are used for encoding respectively based on the uplink electric signals output by the connected clock recovery units and the distribution results output by the distributor to obtain a plurality of data streams; the coupler is used for coupling the plurality of data streams to obtain the uplink combined data frame; wherein the frame header of the uplink combined data frame includes the allocation result, and the data portion of the uplink combined data frame includes the plurality of data streams.

In the design, the code distribution of the multiple uplink electric signals can be realized through the distributor, and then the multiplexing can be realized in the processing unit, so that when each terminal device sends the uplink optical signal, the time slot does not need to be waited, when the uplink communication is needed, the uplink optical signal can be sent in a continuous sending mode, and the time for the uplink communication of multiple terminal devices can be reduced.

In one possible design, the processing device further includes: the plurality of indicator lights are respectively connected with the plurality of optical receivers in a one-to-one correspondence manner; the indicator light is used for indicating whether the optical receiver corresponding to the indicator light receives the first uplink optical signal; or the plurality of indicator lights are connected with the processing unit; and the processing unit is also used for controlling the indicator light corresponding to the optical receiver according to the receiving condition of each optical receiver.

In the design, the scenes of uplink communication of the plurality of terminal devices can be visualized, and whether the physical channel corresponding to the terminal device and used for uplink communication is abnormal or not can be judged by combining the scene of uplink communication needed by the indicator lamp and the terminal device, so that the terminal device can be maintained in time.

In one possible design, the processing device further includes: a first optical device and a beam splitter; the first optical device is configured to receive a downlink optical signal sent by a sink node, and send the downlink optical signal sent by the sink node to the optical splitter; receiving the second uplink optical signal sent by the optical transmitter, and sending the second uplink optical signal to the sink node; and the optical splitter is used for splitting the downlink optical signal sent by the first optical device into multiple paths of sub downlink optical signals and respectively sending the multiple paths of sub downlink optical signals to the multiple terminal devices.

In this design, the optical communication system provided by the present application can distinguish between uplink communication and downlink communication, and thus can improve communication efficiency and reliability in the optical communication system.

In one possible design, the first optical device is any one of the following optical devices: the optical fiber coupling device comprises an optical splitter, an optical coupler, an optical circulator and a wavelength division multiplexer.

In the design, the first optical device can assist the sink node to realize uplink communication and downlink communication with a plurality of terminal devices, and can distinguish a path of the uplink communication from a path of the downlink communication, so as to improve communication efficiency and reliability in the optical communication system.

In one possible design, if the first optical device is a beam splitter, or an optical coupler; the first optical device is further configured to divide the downlink optical signal sent by the aggregation node into a first sub downlink optical signal and a second sub downlink optical signal, and send the second sub downlink optical signal to the optical transmitter; the first optical device is configured to, when sending the downlink optical signal sent by the aggregation node to the optical splitter, specifically, send the first sub-downlink optical signal to the optical splitter; the optical transmitter is further configured to filter the second downlink optical signal sent by the optical splitter.

In this design, in order to guarantee the communication efficiency and reliability of the optical communication system, when the downlink optical signal is transmitted to the path for performing the uplink communication, the downlink optical signal may be filtered in time to guarantee the accuracy of the uplink communication.

In one possible design, the processing device further includes: the system comprises a downlink optical receiver, a plurality of downlink optical transmitters and a plurality of optical splitters; the downlink optical receiver is used for receiving the downlink optical signal sent by the sink node and performing photoelectric conversion on the downlink optical signal to obtain a downlink electrical signal; the processing unit is further configured to group the downlink electrical signals to obtain multiple downlink electrical signals, and send the multiple downlink electrical signals to the multiple downlink optical transmitters respectively; the downlink optical transmitter is used for performing electro-optical conversion on the sub downlink electrical signals to obtain sub downlink optical signals and sending the sub downlink optical signals to an optical splitter connected with the downlink optical transmitter; the optical splitters are configured to split the received downlink optical sub-signals to obtain multiple channels of split downlink optical sub-signals, and send the multiple channels of split downlink optical sub-signals to the multiple terminal devices, respectively.

In this design, by grouping the downlink optical signals, the downlink optical signal with a higher transmission rate from the sink node can be divided into a plurality of sub-downlink optical signals with a lower transmission rate, which can reduce the bandwidth requirement between the processing device and the terminal device, thereby saving the cost.

In one possible design, the processing device further includes: a plurality of wave combiners; and the combiner is configured to combine the sub downlink optical signals sent by the optical splitter to the terminal device to an output port of the terminal device, where the output port is used to send the first uplink optical signal.

In this design, when the terminal device shares the transmission channel for the uplink communication and the downlink communication, the coupler can be used to couple the path for the uplink communication and the path for the downlink communication.

In a second aspect, an embodiment of the present application provides an optical communication system, including: an aggregation node, a processing apparatus as described in any possible design of the first aspect, and a plurality of terminal devices; the terminal devices are used for respectively sending a plurality of first uplink optical signals to the processing device; and the sink node is configured to receive the second uplink optical signal sent by the processing device.

In one possible design, the sink node is further configured to send a downlink optical signal to the processing device; the plurality of terminal devices are further configured to receive the sub downlink optical signals respectively sent by the processing apparatus.

In a third aspect, an embodiment of the present application provides an optical communication method, including: receiving a plurality of paths of uplink electric signals sent by a plurality of optical receivers, and multiplexing the plurality of paths of uplink electric signals to generate an uplink combined data frame; the multi-path uplink electrical signal is obtained after the plurality of optical receivers respectively receive first uplink optical signals sent by one or more terminal devices and perform photoelectric conversion on the first uplink optical signals; and sending the uplink combined data frame to an optical transmitter so that the optical transmitter performs electro-optical conversion on the uplink combined data frame to obtain a second uplink optical signal, and sending the second uplink optical signal to a sink node.

In one possible design, the multiplexing the multiple uplink electrical signals to generate an uplink combined data frame includes: respectively recovering the clock signals of the uplink electric signals sent by the plurality of optical receivers to obtain a plurality of clock signals, wherein the clock signals are used for indicating the transmission rate of the uplink electric signals; distributing corresponding interleaved codes to each terminal device according to the target rate and the plurality of clock signals to obtain a distribution result, so that each terminal device uses the corresponding interleaved codes to bear the uplink electric signals of the terminal device; coding is carried out on the basis of the uplink electric signal of each terminal device and the distribution result, and a plurality of data streams are obtained; coupling the plurality of data streams to obtain the uplink combined data frame; wherein the frame header of the uplink combined data frame includes the allocation result, and the data portion of the uplink combined data frame includes the plurality of data streams.

In one possible design, the method further includes: and controlling the indicator light corresponding to the optical receiver according to the receiving condition of each optical receiver.

In one possible design, the method further includes: receiving a downlink electric signal sent by a downlink optical receiver; the downlink electrical signal is obtained after the downlink optical receiver receives the downlink optical signal sent by the sink node and performs photoelectric conversion on the downlink optical signal; grouping the downlink electric signals to obtain multi-channel sub downlink electric signals, respectively sending the multi-channel sub downlink electric signals to a plurality of downlink optical transmitters, so that the plurality of downlink optical transmitters perform electro-optical conversion on the sub downlink electric signals to obtain sub downlink optical signals, sending the sub downlink optical signals to optical splitters connected with the downlink optical transmitters, respectively splitting the received sub downlink optical signals by the optical splitters to obtain multi-channel split sub downlink optical signals, and then respectively sending the multi-channel split sub downlink optical signals to the plurality of terminal devices.

In a fourth aspect, an embodiment of the present application provides a processing chip, including: a processor configured to perform the method as in any one of the possible designs of the third aspect.

In a fifth aspect, an embodiment of the present application provides an optical communication apparatus, including: a processor and a memory; the memory for storing a computer program; the processor is configured to execute the computer program stored in the memory to cause the communication apparatus to perform the method of any of the possible designs of the third aspect.

In a sixth aspect, an embodiment of the present application provides an optical communication apparatus, including: a processor and an interface circuit; the interface circuit is used for receiving code instructions and transmitting the code instructions to the processor; the processor is configured to execute the code instructions to perform the method of any possible design of the third aspect.

In a seventh aspect, this application provides a computer-readable storage medium storing computer instructions that, when executed, cause a method in any possible design of the third aspect to be implemented.

In an eighth aspect, an embodiment of the present application provides a computer program product, including: computer program code which, when run by a processor of the communication apparatus, causes the communication apparatus to perform the method of any of the possible designs of the third aspect.

For the beneficial effects of the second aspect to the eighth aspect, please refer to the beneficial effects of the possible designs in the first aspect, which are not described herein again.

Drawings

Fig. 1 is a schematic diagram of a point-to-multipoint optical communication system;

fig. 2a is a schematic structural diagram of an optical communication system provided in an embodiment of the present application;

fig. 2b is a schematic structural diagram of a processing unit provided in an embodiment of the present application;

fig. 3a is a schematic diagram of an uplink combined data frame provided in an embodiment of the present application;

FIG. 3b is a diagram of a comparison of sending an upstream optical signal provided in an embodiment of the present application;

fig. 3c is a second schematic structural diagram of an optical communication system provided in the embodiment of the present application;

fig. 4 is a third schematic structural diagram of an optical communication system provided in the embodiment of the present application;

fig. 5 is a fourth schematic structural diagram of an optical communication system provided in the embodiment of the present application;

fig. 6 is a flowchart illustrating an optical communication method provided in an embodiment of the present application;

fig. 7 is a schematic structural diagram of an optical communication device provided in an embodiment of the present application;

fig. 8 is a schematic structural diagram of a processing chip provided in an embodiment of the present application.

Detailed Description

At present, a point-to-multipoint optical communication system mainly comprises a convergence node and a plurality of terminal devices in a passive optical network form; the passive optical network is an access network using optical fibers, and no electronic equipment using power supply exists in the network, so that maintenance is basically not needed, and the maintenance cost is saved. In the prior art, in order to implement a point-to-multipoint optical communication system mode, a simple optical splitter is usually used between a sink node and a plurality of terminal devices, and the method is widely applied due to the advantage of low cost. Referring to fig. 1, which is a schematic structural diagram of a point-to-multipoint optical communication system in the prior art, a sink node may implement connection with a plurality of terminal devices through an optical splitter.

In the architecture of a point-to-multipoint optical communication system adopted in the prior art, when a sink node performs downlink communication to a plurality of terminal devices, the downlink communication can be realized in a broadcast mode. The optical splitter can divide a downlink optical signal sent by the sink node into a plurality of downlink optical signals and broadcast the plurality of downlink optical signals to a plurality of terminal devices; wherein the division into the downstream optical signals can be realized in the form of time division data packets. In this way, after receiving the downlink optical signal, the terminal device can acquire the information sent by the sink node to the terminal device according to the time slot allocated to the terminal device in advance.

Under the architecture of the point-to-multipoint optical communication system adopted in the prior art, when a plurality of terminal devices perform uplink communication to a sink node, a burst mode is usually adopted to implement the uplink communication. That is, each terminal device may transmit an uplink optical signal on a time slot previously allocated to itself based on a Time Domain Multiple Access (TDMA) technique; then, each timeslot carries uplink optical signals of different terminal devices, and the uplink optical signals can be sent to the aggregation node through the optical splitter. For example, terminal device 1 may transmit an upstream optical signal on time slot 1, terminal device 2 may transmit an upstream optical signal on time slot 2, … …, and terminal device N may transmit an upstream optical signal on time slot N. In order to avoid collision, a certain time interval is provided between the time slots.

However, uplink communication uses TDMA technology, multiple terminal devices share the transmission medium of the uplink optical signal, and the implementation manner of sending signals at different time slots is adopted, so that each terminal device needs to wait for a period of time to send the next signal after sending a signal; alternatively, it can also be understood that only one terminal device can transmit a signal in one time slot of the transmission medium of the uplink optical signal. Therefore, the implementation mode adopted by the prior art has certain network delay and jitter, and the real-time performance of communication is poor. Under some scenes with high requirements on network delay and jitter, the system architecture provided in the prior art hardly meets the requirements of optical communication.

Based on this, the present application provides an optical communication system, which is used to solve the problems that a point-to-multipoint optical communication system adopted in the prior art has a certain network delay and jitter when performing uplink communication, and the real-time performance of communication is poor. According to the point-to-multipoint optical communication system, when the terminal equipment carries out uplink communication, a continuous sending mode can be adopted, so that transmission delay and jitter can be reduced, and the real-time performance of communication can be improved.

In the present embodiment, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that three relationships may exist. For example, a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not intended to indicate or imply relative importance nor order to be construed.

The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Fig. 2a is a schematic architecture diagram of an optical communication system according to an embodiment of the present disclosure. The optical communication system includes: the sink node 201, the processing device 202 and the plurality of terminal devices 203 are assumed to include N terminal devices. It should be noted that N is a positive integer, and the value of N may be determined according to the number of terminal devices 203 that access the aggregation node 201 in an actual service scenario. For example, in a home broadband network, if there are 3 mobile phones and 1 tablet pc accessing the home broadband network, the value of N is 4. And, if there is a terminal device newly accessed or removed from the home broadband network, the number of N may be changed. The plurality of terminal devices here therefore represents one or more terminal devices 203 of the access aggregation node 201.

The processing device 202 is configured to assist in implementing uplink communication and downlink communication between the sink node 201 and the plurality of terminal devices 203. The uplink communication means that an uplink optical signal sent by the terminal device 203 is converged by the sink node 201, and then transmitted to the core network by the sink node 201. The downlink communication means a downlink optical signal transmitted from the core network, and is transmitted to the plurality of terminal devices 203 via the sink node 201.

In this application, the processing device 202 may specifically include: a plurality of optical receivers 2021, a processing unit 2022, and an optical transmitter 2023. Alternatively, in a scenario where the number of optical receivers 2021 is sufficient, the plurality of optical receivers 2021 may correspond to the plurality of terminal devices 203 one to one. For example, in fig. 2a, the optical receiver 1 corresponds to the terminal device 1, the optical receiver 2 corresponds to the terminal device 2, … …, and the optical receiver N corresponds to the terminal device N. Alternatively, optionally, the configuration number of the general optical receivers 2021 is fixed, and if the number of the terminal devices connected is large, the optical receivers 2021 may correspond to the plurality of terminal devices 203. For example, if there are a plurality of optical receivers and a plurality of terminal devices, each optical receiver 2021 may be connected to two corresponding terminal devices 203; alternatively, a part of the optical receiver 2021 may be connected to one terminal device, and another part of the optical receiver 2021 may be connected to more than two terminal devices 203. Therefore, the number of the plurality of optical receivers 2021, the number of the plurality of terminal devices 203, and the corresponding connection relationship between the optical receivers 2021 and the terminal devices 203 are not limited in the present application, and may be configured according to a specific application scenario. If there is one optical receiver 2021 connected to a plurality of terminal apparatuses 203, a plurality of receiving ports may be configured on the optical receiver 2021, and uplink optical signals transmitted from different terminal apparatuses 203 may be received by using different ports; alternatively, the reception may be performed between the optical receiver and a plurality of terminal devices by a device for convergence such as a multiplexer, which is not limited in the present application.

For clearly understanding the processing procedure of an optical communication system provided in the present application, the following describes an uplink communication procedure and a downlink communication procedure separately with reference to the embodiments.

Scenario 1, uplink communication procedure

The terminal device 203 is configured to transmit the first uplink optical signal to the optical receiver 2021 corresponding to the terminal device. Illustratively, based on each terminal device 203 having its corresponding optical receiver 2021, for example, in fig. 2a, the terminal device 1 corresponds to the optical receiver 1, the terminal device 2 corresponds to the optical receivers 2, … …, and the terminal device N corresponds to the optical receiver N, the terminal device 203 may adopt a continuous transmission mode in a scene where an uplink optical signal needs to be transmitted. It should be noted that the optical receiver may also correspond to a plurality of terminal devices, and fig. 2a is described by taking an example in which each optical receiver corresponds to one terminal device. Therefore, compared with the implementation mode that in the framework adopted in the prior art, each terminal device needs to wait for the time slot allocated to the terminal device to send the signal, the method and the device for transmitting the signal can improve the real-time performance of communication. In addition, in the application, each terminal device is configured with a corresponding optical receiver to receive the uplink optical signal sent by the terminal device, so that each terminal device can have its own independent physical channel when sending the uplink optical signal, and can be isolated from the physical channels used by other terminal devices for sending the uplink optical signal, and thus, the terminal devices and the terminal devices do not affect each other when sending the uplink optical signal. In other words, with the implementation manner in the prior art, if a certain terminal device sends an uplink optical signal all the time due to a sending failure, other terminal devices cannot send the uplink optical signal all the time, and thus communication cannot be achieved; the optical communication system has the characteristics that the physical channels are mutually independent and isolated, so that the sending fault of a single terminal device cannot influence other terminal devices to carry out uplink communication.

The optical receiver 2021 is configured to receive a first uplink optical signal sent by one or more corresponding terminal devices 203, and perform photoelectric conversion on the first uplink optical signal to obtain an uplink electrical signal. For example, after receiving an uplink optical signal 1 sent by a terminal device 1, an optical receiver 1 performs photoelectric conversion on the uplink optical signal 1 to obtain an uplink electrical signal 1; after receiving the uplink optical signal 2 sent by the terminal device 2, the optical receiver 2 performs photoelectric conversion on the uplink optical signal 2 to obtain an uplink electrical signal 2, … …, and after receiving the uplink optical signal N sent by the terminal device N, the optical receiver N performs photoelectric conversion on the uplink optical signal N to obtain an uplink electrical signal N. In this way, multiple uplink electrical signals can be obtained by the multiple optical receivers 2021, and then the subsequent processing of the multiple uplink electrical signals is continued by the processing unit 2022. The multiplexing processing is carried out by converting a plurality of uplink optical signals into an electrical domain, so that the data efficiency can be improved, and the processing complexity can be reduced.

The processing unit 2022 is configured to receive multiple uplink electrical signals sent by the multiple optical receivers 2021, and multiplex the multiple uplink electrical signals to generate an uplink combined data frame. In this way, the processing unit 2022 can simultaneously receive uplink electrical signals transmitted from a plurality of terminal apparatuses 203, such as the uplink electrical signal 1, the uplink electrical signal 2, … …, and the uplink electrical signal N described in the foregoing embodiments. In a possible application scenario, the application can multiplex a lower-speed uplink electrical signal sent by the terminal device 203 into a higher-speed uplink combined data frame, so that the time for uplink communication can be reduced, and the cost of a transmission medium between each terminal device and the processing unit can be saved.

Fig. 2b is a schematic structural diagram of a processing unit 2022 according to an embodiment of the present disclosure. In a possible implementation, the processing unit 2022 comprises: a plurality of clock recovery units 20221, a distributor 20222, a plurality of encoders 20223, and a coupler 20224. The plurality of clock recovery units 20221 correspond to the plurality of optical receivers 2021, respectively, and the corresponding relationship between the plurality of optical receivers 2021 and the plurality of terminal devices 203 is similar, and optionally, the plurality of clock recovery units 20221 may correspond to the plurality of optical receivers 2021 in a one-to-one relationship; alternatively, one clock recovery unit 20221 may correspond to a plurality of optical receivers 2021, and the detailed implementation is not described herein again. It should be noted that, in general, the number of the clock recovery units 20221 and the number of the optical receivers 2021 may be configured to be the same or similar. For example, assuming an implementation in which a plurality of clock recovery units 20221 correspond to a plurality of optical receivers 2021 one to one, the clock recovery unit 1 may correspond to the optical receiver 1, the clock recovery unit 2 may correspond to the optical receivers 2, … …, and the clock recovery unit N may correspond to the optical receiver N (not shown in fig. 2 b).

The encoders 20223 respectively correspond to the clock recovery units 20221, and the corresponding relationship is similar to the implementation manner of the corresponding relationship between the clock recovery units 20221 and the optical receivers 2021, which is not described herein again. For example, assume an embodiment in which a plurality of encoders 20223 are respectively in one-to-one correspondence with a plurality of clock recovery units 20221, as shown in fig. 2b, the CDR block 1 corresponds to the encoder 1, the CDR block 2 corresponds to the encoders 2, … …, and the CDR block N corresponds to the encoder N.

A distributor 20222 connected to the plurality of encoders 20223;

the couplers 20224 are connected to the encoders 20223, respectively.

The clock recovery unit 20221 is configured to recover a clock signal from the uplink electrical signal input by the optical receiver, where the clock signal is used to indicate a transmission rate of the uplink electrical signal, and output the uplink electrical signal to an encoder 20223 corresponding to the clock recovery unit 20221. In a general scenario, when the terminal device 203 sends an uplink optical signal, a clock signal is embedded into a transmitted data stream through data encoding, and then the clock signal can be recovered through a clock recovery unit, and the recovered clock signal can be used in subsequent transmission and processing processes of data. Taking the clock recovery unit 1 as an example, when it receives the uplink electrical signal 1 sent by the optical receiver 1, the clock recovery unit recovers the clock signal for the uplink electrical signal 1, and the transmission rate of the terminal device 1 can be obtained, for example, 10M/s. In the description of the embodiments of the present application, different terminal devices, optical receivers, clock recovery units, and the like are distinguished by their numbers, but the order, type, and the like of the terminal devices in an actual scene are not limited. Optionally, the clock recovery unit may be a Clock Decision Recovery (CDR) module. Or, the function of the clock recovery unit can also be realized through the sampling module and the data recovery module together, and the sampling module can realize analog-to-digital conversion if the uplink electric signal is an analog signal, so as to realize further encoding; and the data recovery module can extract the clock information in the signal based on the converted digital signal.

The distributor 20222 is configured to distribute, according to the multiple clock signals and the target rate recovered by the multiple clock recovery units 20221, a corresponding interleaved code to each terminal device 203 to obtain a distribution result, so that each terminal device 203 uses the corresponding interleaved code to carry the uplink electrical signal of the terminal device. For example, the allocator may implement interleaved coding allocation for uplink optical signals transmitted by multiple terminal devices by using a TDMA technique, or the allocator may also implement other coding schemes that can implement multiplexing, such as frequency division multiple access, and the like, which is not limited in this application. It should be noted that before the interleaving coding allocation is performed, if the uplink electrical signal is an analog signal, analog-to-digital conversion is performed on the uplink electrical signal, so that the allocator and the encoder implement coding based on a digital signal.

For example, the allocator 20222 in fig. 2b shows an example of allocating different time slots for a plurality of terminal apparatuses, assuming that the allocator allocates using TDMA technique, that is, the allocator 20222 may allocate time slot 1 for terminal apparatus 1, time slot 2 for terminal apparatus 2, … …, and time slot N for terminal apparatus N. Moreover, with the system provided by the present application, the terminal device 203 may use a lower transmission bandwidth to send the uplink optical signal to the processing apparatus 202, but each terminal device 203 may continuously send the uplink optical signal; the processing device 202 may use a higher transmission bandwidth to send the uplink optical signal to the sink node 201, which not only reduces the cost of the terminal device 203, but also reduces the time for the plurality of terminal devices 203 to perform uplink communication, and improves the real-time performance of communication.

The encoder 20223 is configured to encode the uplink electrical signal output by the clock recovery unit 20221 corresponding to the encoder 20223 and the distribution result output by the distributor 20223, so as to obtain a data stream. Illustratively, the upstream electrical signal after passing through the clock recovery unit 20221 is multiplied by the interleaved code distributed by the distributor 20222, and a data stream corresponding to each terminal device can be obtained. Data stream 1, data stream 2, … …, data stream N as shown in fig. 2 b.

The coupler 20224 is configured to couple multiple data streams obtained by multiple encoders 20223, so as to obtain the uplink combined data frame; wherein the frame header of the uplink combined data frame includes the allocation result, and the data portion of the uplink combined data frame includes the plurality of data streams. Referring to fig. 3a, taking a single uplink combined data frame as an example, the coupler 20224 may implement aggregation of the received multiple data streams corresponding to each terminal device according to the allocation result obtained by the allocator 20222, so as to obtain a single uplink combined data frame, and then continue to transmit the uplink combined data frame according to the target rate. In order to enable the aggregation node 201 to obtain the encoding result of the uplink optical signal sent by the processing apparatus 202 to the plurality of terminal devices 203, the frame header of the uplink combined data frame output by the coupler 20224 may indicate the allocation result of the interleaving encoding of the plurality of terminal devices by the allocator 20222, so that the uplink optical signal sent by each terminal device may be distinguished.

With continued reference to fig. 2a, processing continues via the optical transmitter 2023 after the processing unit 2022 outputs the upstream combined data frame. The optical transmitter 2023 is configured to perform electrical-to-optical conversion on the uplink combined data frame generated by the processing unit 2022 to obtain a second uplink optical signal, and send the second uplink optical signal. Illustratively, after the processing device 202 multiplexes based on the electrical signals, since the processing device 202 and the sink node 201 are still connected by the optical fiber, the optical transmitter 2023 may perform an electrical-to-optical conversion on the uplink combined data frame in the form of the electrical signals, so as to obtain a second uplink optical signal corresponding to the uplink combined data frame. It should be noted that, if the first uplink optical signal is transmitted for each terminal device, a plurality of first uplink optical signals exist in a plurality of terminal devices, and the second uplink optical signal is a combination of the first uplink optical signals transmitted by the plurality of terminal devices, so the "first" and the "second" are only used for distinction.

Finally, the second uplink optical signal output by the processing device 202 may be sent to the aggregation node 201, and the aggregation node 201 continues to perform subsequent transmission and processing on the second uplink optical signal.

Through the point-to-multipoint optical communication system provided by the application, compared with the framework that the sink node and the terminal equipment are connected through the optical splitter in the prior art, the point-to-multipoint optical communication system can realize that each terminal equipment continuously sends the uplink optical signal, thereby compared with the mode that a plurality of terminal equipment adopted in the prior art send the uplink optical signal under the TDMA framework, the waiting time can be reduced, the communication time delay is reduced, and the real-time performance of communication can be improved. Moreover, by the optical communication system structure provided by the application, transmission media used by a plurality of terminal devices for sending uplink optical signals can be separated, and compared with a mode of sharing the transmission media in the prior art, the problem of wavelength conflict in the multi-path uplink optical signals received by the sink node can be avoided, and the reliability of uplink communication is improved; the problem of delay jitter caused by uplink communication in a burst mode can be avoided. In addition, because the burst mode is adopted for uplink communication in the prior art, under the scene that new terminal equipment performs online registration, the window opening time needs to be waited, namely, the terminal equipment which is registered is waited for a time slot which does not perform uplink communication, so that the registration efficiency is lower.

To better understand the differences between the optical communication systems provided herein compared to the point-to-multipoint optical communication systems employed in the prior art. For example, referring to fig. 3b, assuming that N is 10 and the uplink transmission bandwidth of each terminal device is 10 megabits (Mbps, M), if the architecture in the prior art is adopted, in a scenario where each terminal device needs 1S to transmit an uplink optical signal, since the TDMA technology is adopted, the uplink optical signals of 10 terminal devices need to be transmitted over at least 10S total time slots. It can also be understood that 10 terminal devices complete the transmission of the uplink optical signal through one of the 10 time slots as shown in fig. 3 b. If the point-to-multipoint optical communication system provided in the embodiment of the present application is adopted, based on that each terminal device 203 has a corresponding optical receiver 2021, each terminal device 203 can directly send an uplink optical signal to the processing apparatus 202 through its corresponding optical receiver 2021 when it needs to send the uplink optical signal; then, multiplexing is continued through the processing device 202, so as to converge the uplink optical signals sent by the 10 terminal devices to obtain an uplink combined data frame. Therefore, the plurality of terminal devices can synchronously transmit the uplink optical signals without adopting an implementation mode of transmitting the uplink optical signals according to the allocated time slots, so that the waiting time of the plurality of terminal devices for uplink communication can be reduced.

In a general scenario, the uplink transmission bandwidth of the aggregated uplink combined data frame may reach 100M or more. Therefore, the point-to-multipoint optical communication system provided by the application can converge a plurality of low-speed uplink transmission channels into a single high-speed uplink transmission channel, so that the system provided by the application can realize that a sending module of an uplink optical signal of a single terminal device can allow a lower bandwidth, thereby reducing the cost of the terminal. In addition, the point-to-multipoint optical communication system provided by the application can realize that a corresponding stable optical signal transmission channel is established for each terminal device, and compared with the technical scheme that a plurality of terminal devices need to share the same transmission medium and adopt the TDMA technology to carry out uplink communication in the prior art, the application can avoid delay jitter caused by communication in a burst mode.

In addition, the optical communication system provided by the application can also realize the visualization of a physical channel for uplink optical signal transmission. Referring to fig. 3c, in a possible scenario, the processing device 202 may further include: a plurality of indicator lights 2024. In an alternative embodiment, the plurality of indicator lights 2024 may be connected to the plurality of optical receivers 2021 in a one-to-one correspondence. Each optical receiver 2021 is correspondingly connected with an indicator lamp, for example, the optical receiver 1 is correspondingly connected with the indicator lamp 1, the optical receiver 2 is correspondingly connected with the indicator lamps 2 and … …, and the optical receiver N is correspondingly connected with the indicator lamp N. The indicator light 2024 is configured to indicate whether the optical receiver 2021, to which the indicator light 2024 is correspondingly connected, receives the first uplink optical signal. Illustratively, when the optical receiver 2021 receives the first uplink optical signal, it may indicate by lighting the indicator lamp 2024; it is understood that the indicator light 2024 may be displayed in a non-illuminated state when the optical receiver 2021 does not receive the first uplink optical signal.

In another alternative embodiment, the plurality of indicator lamps 2024 may be further connected to the processing unit 2022, and each indicator lamp 2024 may be configured to indicate whether an optical receiver 2021 receives an uplink optical signal sent by the terminal device. In this scenario, the processing unit 2022 may be further configured to control the indicator lamp 2024 corresponding to each optical receiver according to the receiving condition of each optical receiver. Illustratively, the processing unit 2022 controls the connected indicator light 1 to be displayed as a light after receiving the uplink electrical signal sent by the optical receiver 1, so as to indicate that the optical receiver 1 receives the uplink optical signal, so as to further determine that the terminal device connected to the optical receiver needs to perform uplink communication. Therefore, the scenes of uplink communication of the plurality of terminal devices can be visualized, and whether the physical channel corresponding to the terminal device and used for uplink communication is abnormal or not can be judged by combining the scene of uplink communication needed by the indicator lamp and the terminal device. For example, if the indication lamp is turned on to indicate that there is an uplink optical signal to be sent, it is known that the terminal device 1 is uploading a video, but the indication lamp 1 is not turned on, so that it can be inferred that there may be an abnormality in a physical channel for performing uplink communication corresponding to the terminal device 1, so as to perform maintenance in time.

Scenario 2, downstream communication Process

In a possible implementation manner, referring to fig. 4, the processing device 202 may further include: a first optical device 2025 and a beam splitter 2026. The first optical device 2025 and the optical splitter 2026 may enable the aggregation node 201 to perform downlink communication to multiple terminal devices 203.

In this application, after the aggregation node 201 sends a downlink optical signal, the first optical device 2025 is configured to receive the downlink optical signal sent by the aggregation node 201, and send the downlink optical signal sent by the aggregation node 201 to the optical splitter 2026. Then, the optical splitter 2026 is configured to split the downlink optical signal sent by the first optical device 2025 into multiple sub downlink optical signals, and send the multiple sub downlink optical signals to the plurality of terminal devices 203, respectively.

In this embodiment, the first optical device 2025 may further be configured to receive the second uplink optical signal sent by the optical transmitter 2023, and send the second uplink optical signal to the aggregation node 201.

The first optical device 2025 may be any one of the following optical devices: the optical fiber coupling device comprises an optical splitter, an optical coupler, an optical circulator and a wavelength division multiplexer. It should be noted that, if the first optical device 2025 is an optical splitter or an optical coupler, in this case, the first optical device 2025 is further configured to divide the downlink optical signal sent by the aggregation node 201 into a first sub downlink optical signal and a second sub downlink optical signal, and send the second sub downlink optical signal to the optical transmitter 2023, and further the optical transmitter 2023 is further configured to filter the second sub downlink optical signal sent by the optical splitter 2026. Furthermore, if the first optical device 2025 is an optical circulator or a wavelength division multiplexer, the downlink optical signal does not need to be sent to a path for uplink communication, that is, the optical transmitter 2023 does not receive the downlink optical signal; for example, if the first optical device 2025 is an optical circulator, the optical circulator may receive the second uplink optical signal transmitted from the optical transmitter 2023 on the one hand, and may transmit the downlink optical signal on the other hand. Correspondingly, the first optical device 2025 is configured to specifically send the first sub downlink optical signal to the optical splitter 2026 when the downlink optical signal sent by the aggregation node 201 is sent to the optical splitter 2026.

It should be noted that, if the sink node 201 performs uplink communication and downlink communication through different optical fibers, the sink node 201 may also be directly connected to the optical splitter 2026 through the optical fiber 1 to implement sending of a downlink optical signal; and is connected to the optical transmitter 2023 by the optical fiber 2 to enable reception of the upstream optical signal.

In another alternative embodiment, referring to fig. 5, the processing device 202 may further include: a downstream optical receiver 2028, a plurality of downstream optical transmitters 2029, a plurality of optical splitters 2026; the downlink optical transmitters 2029 may correspond to the optical splitters 2026 one by one, for example, the downlink optical transmitter 1 corresponds to the optical splitter 1, the downlink optical transmitter 2 corresponds to the optical splitters 2 and … …, and the downlink optical transmitter N corresponds to the optical splitter N. Alternatively, the number of downstream optical transmitters 2029 may be different from the number of optical splitters 2026, and one downstream optical transmitter 2029 may correspond to a plurality of optical splitters 2026. In fig. 5, a description is given by taking a one-to-one correspondence between a plurality of downstream optical transmitters 2029 and the plurality of optical splitters 2026 as an example.

In this application, after the sink node 201 sends the downlink optical signal, the downlink optical receiver 2028 is configured to perform photoelectric conversion on the downlink optical signal to obtain a downlink electrical signal. It should be noted that, if the sink node implements uplink communication and downlink communication through a single bidirectional optical fiber, in this application, the functions to be implemented by the downlink optical receiver 2028 and the optical transmitter 203 may also be implemented by the optical transceiver 2038. The optical transceiver 2038 may be an optical transceiver, an optical transceiver module, a coherent transceiver, a single-wavelength direct alignment detection transceiver, a multi-wavelength direct alignment detection transceiver, or the like. If the sink node implements uplink communication and downlink communication through different optical fibers, the downlink optical receiver 2028 and the optical transmitter 2023 may be implemented by devices independent of each other. It is to be understood that the units or modules described in the embodiments of the present application may be integrated or exist independently according to different application scenarios.

In this embodiment, the processing unit 2022 may be further configured to group the downlink electrical signals to obtain multiple sub downlink electrical signals, and send the multiple sub downlink electrical signals to the multiple downlink optical transmitters 2029 respectively. For example, assuming that the transmission rate of the downlink electrical signal sent by the sink node 201 is 100M/s, the processing unit 2022 may group the downlink electrical signal into a plurality of low-speed sub-downlink electrical signals, for example, a plurality of sub-downlink electrical signals of about 10M/s to 20M/s. The plurality of sub downstream electrical signals may then be transmitted to the plurality of terminal devices 203 by the plurality of downstream optical transmitters 2029, respectively.

The downlink optical transmitter 2029 is configured to perform electro-optical conversion on the sub downlink electrical signal to obtain a sub downlink optical signal, and send the sub downlink optical signal to an optical splitter corresponding to the downlink optical transmitter 2029. The optical splitters are configured to split the sub downlink optical signals respectively to obtain multiple channels of split sub downlink optical signals, and send the multiple channels of split sub downlink optical signals to the multiple terminal devices. It should be noted that M may be generally smaller than N, and the plurality of optical splitters may split the plurality of sub downlink optical signals into a plurality of split sub downlink optical signals according to a pre-configured optical splitting scheme, for example, M may be 5,N may be 10, and the plurality of optical splitters may be one-to-two optical splitters, and after 5 optical splitters split the 5 sub downlink optical signals, 10 split sub downlink optical signals may be obtained, and may be sent to 10 terminal devices, respectively. Thus, by grouping the downlink optical signals, the downlink optical signals with higher transmission rate from the sink node can be divided into a plurality of sub-downlink optical signals with lower transmission rate, so that the bandwidth requirement between the processing device and the terminal equipment can be reduced, and the cost can be saved.

In the embodiment described with reference to fig. 4 and fig. 5, if the terminal device 203 implements uplink communication and downlink communication through a single bidirectional optical fiber, the processing apparatus may further include: a plurality of wave combiners 2027, and the plurality of wave combiners 2027 may correspond to the plurality of terminal devices one to one. The combiner 2027 is configured to combine the sub downlink optical signal sent by the optical splitter to the terminal device to an output port of the terminal device, where the output port is used to send the first uplink optical signal. In this way, the terminal device 203 can realize transmission of an upstream optical signal and reception of a downstream optical signal through the connected optical fiber. Alternatively, if the terminal device 203 can implement uplink communication and downlink communication through different optical fibers, the terminal device 203 can send the first uplink optical signal through the optical fiber 1 and receive the downlink optical signal through the optical fiber 2.

Fig. 6 is a schematic flowchart of an optical communication method according to an embodiment of the present application. The method comprises the following steps:

s601: the processing unit 2022 receives the multiple uplink electrical signals sent by the multiple optical receivers, and multiplexes the multiple uplink electrical signals to generate an uplink combined data frame; the multiple uplink electrical signals are obtained after the multiple optical receivers respectively receive first uplink optical signals sent by one or more terminal devices and perform photoelectric conversion on the first uplink optical signals.

In an optional implementation manner, the processing unit 2022 performs clock signal recovery on the uplink electrical signals sent by the multiple optical receivers, respectively, to obtain multiple clock signals, where the clock signals are used to indicate a transmission rate of the uplink electrical signals; distributing corresponding interleaved codes to each terminal device according to the target rate and the plurality of clock signals to obtain a distribution result, so that each terminal device uses the corresponding interleaved codes to bear uplink electric signals of the terminal device; coding is carried out on the basis of the uplink electric signal of each terminal device and the distribution result to obtain a plurality of data streams; coupling the plurality of data streams to obtain the uplink combined data frame; wherein the frame header of the uplink combined data frame includes the allocation result, and the data portion of the uplink combined data frame includes the plurality of data streams.

S602: the processing unit 2022 sends the uplink combined data frame to an optical transmitter, so that the optical transmitter performs an electro-optical conversion on the uplink combined data frame to obtain a second uplink optical signal, and sends the second uplink optical signal to a sink node.

Optionally, the processing unit 2022 receives a downlink electrical signal sent by the downlink optical receiver; the downlink electrical signal is obtained after the downlink optical receiver receives a downlink optical signal sent by the sink node and performs photoelectric conversion on the downlink optical signal; grouping the downlink electric signals to obtain multi-channel downlink electric signals, respectively sending the multi-channel downlink electric signals to a plurality of downlink optical transmitters, so that the plurality of downlink optical transmitters perform electro-optical conversion on the sub downlink electric signals to obtain sub downlink optical signals, sending the sub downlink optical signals to optical splitters connected with the downlink optical transmitters, respectively splitting the received sub downlink optical signals by the optical splitters, and respectively sending the obtained multi-channel split sub downlink optical signals to the plurality of terminal devices.

In addition, the processing unit 2022 may also control an indicator light corresponding to each optical receiver according to the receiving condition of the optical receiver.

Based on the same concept as the optical communication method, as shown in fig. 7, the embodiment of the present application further provides a schematic structural diagram of an optical communication device 700. The optical communication apparatus 700 may be used to implement the method described in the above method embodiment, and reference may be made to the description in the above method embodiment. The optical communication device 700 may include one or more processors 701. The processor 701 may be a general purpose processor or a special purpose processor, etc. For example, a baseband processor, or a central processor. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control the optical communication apparatus 700, execute software programs, and process data of the software programs. The optical communication apparatus 700 may include a transceiver to enable input (reception) and output (transmission) of signals.

The optical communication device 700 comprises one or more processors 701, and the one or more processors 701 may implement the method implemented by the processing unit 2022 in the illustrated embodiment described above.

Optionally, the processor 701 may also implement other functions besides implementing the method of the embodiment implemented by the processing unit 2022.

Alternatively, in one design, the processor 701 may execute instructions to cause the optical communication apparatus 700 to perform the method described in the above method embodiment. The instructions may be stored in whole or in part within the processor, such as instructions 703, or in whole or in part in a memory 702 coupled to the processor, such as instructions 704, or may collectively cause the optical communication apparatus 700 to perform the method described in the above method embodiments by

instructions

703 and 704.

In yet another possible design, the optical communication apparatus 700 may include one or more memories 702 having instructions 704 stored thereon, which are executable on a processor, so that the optical communication apparatus 700 performs the methods described in the above method embodiments. Optionally, the memory may also store data. Instructions and/or data may also be stored in the optional processor. For example, the one or more memories 702 may store the correspondence described in the above embodiments, or the related parameters or tables referred to in the above embodiments, and the like. The processor and the memory may be provided separately or may be integrated together.

In yet another possible design, the optical communication device 700 may also include a transceiver 705 and an antenna 706. The processor 701 may be referred to as a processing unit and controls a device (terminal or base station). The transceiver 705 may be referred to as a transceiver, a transceiver circuit, a transceiver, etc. for performing a transceiving function of the apparatus through the antenna 706.

It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip having signal processing capability. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be located in ram, flash, rom, prom, or eprom, registers, etc. as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), SLDRAM (synchronous DRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Based on the same concept as the method embodiment, the embodiment of the present application further provides a computer-readable storage medium, on which some instructions are stored, and when the instructions are called by a computer and executed, the instructions may cause the computer to perform the method involved in any one of the possible designs of the method embodiment and the method embodiment. In the embodiment of the present application, the computer-readable storage medium is not limited, and may be, for example, a RAM (random-access memory), a ROM (read-only memory), and the like.

Based on the same idea as the above method embodiments, the present application also provides a computer program product which, when called by a computer, may perform the method as referred to in the method embodiments and any possible design of the above method embodiments.

Based on the same concept as the method embodiment, the present application further provides a chip 800, as shown in fig. 8, where the chip 800 may include an input/output interface 801 and a logic circuit 802 for implementing the method according to any one of the possible implementations of the method embodiment and the method embodiment, where "coupled" refers to two components being directly or indirectly combined with each other, and the combination may be fixed or movable, and the combination may allow flowing liquid, electric, electrical signal or other types of signals to be communicated between the two components.

It should be noted that, the division of the modules in the embodiments of the present application is schematic, and is only a logical function division, and in actual implementation, there may be another division manner, and in addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or may exist alone physically, or two or more units are integrated in one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method of the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is only a logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present application.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented in hardware, firmware, or a combination thereof. When implemented in software, the functions described above may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer-readable storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. Taking this as an example but not limiting: computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Furthermore, the method is simple. Any connection is properly termed a computer-readable medium. For example, if software is transmitted from a website, a server, or other remote source using a coaxial cable, a fiber optic cable, a twisted pair, a Digital Subscriber Line (DSL), or a wireless technology such as infrared, radio, and microwave, the coaxial cable, the fiber optic cable, the twisted pair, the DSL, or the wireless technology such as infrared, radio, and microwave are included in the fixation of the medium. Disk (Disk) and disc (disc), as used herein, includes Compact Disc (CD), laser disc, optical disc, digital Versatile Disc (DVD), floppy Disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

In short, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A processing apparatus, comprising: a plurality of optical receivers, processing units and optical transmitters;

the plurality of optical receivers are used for respectively receiving first uplink optical signals sent by one or more terminal devices and performing photoelectric conversion on the first uplink optical signals to obtain a plurality of paths of uplink electrical signals;

the processing unit is configured to receive the multiple uplink electrical signals sent by the multiple optical receivers, and multiplex the multiple uplink electrical signals to generate an uplink combined data frame;

the optical transmitter is configured to perform electro-optical conversion on the uplink combined data frame generated by the processing unit to obtain a second uplink optical signal, and send the second uplink optical signal to a sink node.

2. The processing device according to claim 1, wherein the processing unit comprises: a plurality of clock recovery units, a distributor, a plurality of encoders, and a coupler;

the plurality of clock recovery units are configured to perform clock signal recovery on the uplink electrical signals sent by the plurality of optical receivers, respectively, to obtain a plurality of clock signals, where the clock signals are used to indicate a transmission rate of the uplink electrical signals; the uplink electric signal is output to an encoder connected with the clock recovery unit;

the distributor is configured to distribute a corresponding interleaved code to each terminal device according to a target rate and the plurality of clock signals to obtain a distribution result, so that each terminal device uses the corresponding interleaved code to carry an uplink electrical signal of the terminal device;

the encoders are used for encoding based on the uplink electric signals output by the connected clock recovery units and the distribution results output by the distributor respectively to obtain a plurality of data streams

The coupler is used for coupling the plurality of data streams to obtain the uplink combined data frame; wherein the frame header of the uplink combined data frame includes the allocation result, and the data portion of the uplink combined data frame includes the plurality of data streams.

3. The processing apparatus according to claim 1 or 2, characterized in that the processing apparatus further comprises: the plurality of indicator lights are respectively connected with the plurality of optical receivers in a one-to-one correspondence manner; the indicator light is used for indicating whether the optical receiver corresponding to the indicator light receives the first uplink optical signal; alternatively, the first and second electrodes may be,

the plurality of indicator lights are connected with the processing unit; and the processing unit is also used for controlling the indicator light corresponding to the optical receiver according to the receiving condition of each optical receiver.

4. The processing apparatus according to any one of claims 1 to 3, characterized in that the processing apparatus further comprises: a first optical device and a beam splitter;

the first optical device is configured to receive a downlink optical signal sent by a sink node, and send the downlink optical signal sent by the sink node to the optical splitter; receiving the second uplink optical signal sent by the optical transmitter, and sending the second uplink optical signal to the sink node;

and the optical splitter is used for splitting the downlink optical signal sent by the first optical device into multiple paths of sub downlink optical signals and respectively sending the multiple paths of sub downlink optical signals to the multiple terminal devices.

5. The processing apparatus according to claim 4, wherein the first optical device is any one of the following optical devices: the optical fiber coupling device comprises an optical splitter, an optical coupler, an optical circulator and a wavelength division multiplexer.

6. The processing apparatus according to claim 5, wherein if the first optical device is a beam splitter or an optical coupler;

the first optical device is further configured to divide the downlink optical signal sent by the aggregation node into a first sub-downlink optical signal and a second sub-downlink optical signal, and send the second sub-downlink optical signal to the optical transmitter;

the first optical device is configured to specifically send the first sub downlink optical signal to the optical splitter when the downlink optical signal sent by the aggregation node is sent to the optical splitter;

the optical transmitter is further configured to filter the second downlink optical signal sent by the optical splitter.

7. The processing apparatus according to any one of claims 1 to 3, characterized in that the processing apparatus further comprises: the system comprises a downlink optical receiver, a plurality of downlink optical transmitters and a plurality of optical splitters;

the downlink optical receiver is configured to receive a downlink optical signal sent by the sink node, and perform photoelectric conversion on the downlink optical signal to obtain a downlink electrical signal;

the processing unit is further configured to group the downlink electrical signals to obtain multiple downlink electrical signals, and send the multiple downlink electrical signals to the multiple downlink optical transmitters respectively;

the downlink optical transmitter is used for performing electro-optical conversion on the sub downlink electric signals to obtain sub downlink optical signals and sending the sub downlink optical signals to the optical splitter connected with the downlink optical transmitter;

the optical splitters are configured to split the received downlink optical sub-signals to obtain multiple split downlink optical sub-signals, and send the multiple split downlink optical sub-signals to the multiple terminal devices, respectively.

8. The processing apparatus according to claim 4 or 7, characterized in that the processing apparatus further comprises: a plurality of wave combiners;

and the combiner is configured to combine the sub downlink optical signal sent by the optical splitter to the terminal device to an output port of the terminal device, where the output port is used to send the first uplink optical signal.

9. An optical communication system, comprising: a sink node, a processing apparatus according to any one of claims 1 to 8 and a plurality of terminal devices;

the terminal devices are used for respectively sending a plurality of first uplink optical signals to the processing device;

and the sink node is used for receiving the second uplink optical signal sent by the processing device.

10. The optical communication system of claim 9,

the sink node is further configured to send a downlink optical signal to the processing device;

the plurality of terminal devices are further configured to receive the sub downlink optical signals respectively sent by the processing apparatus.

11. An optical communication method, comprising:

receiving a plurality of paths of uplink electric signals sent by a plurality of optical receivers, and multiplexing the plurality of paths of uplink electric signals to generate an uplink combined data frame; the multi-path uplink electrical signal is obtained after the plurality of optical receivers respectively receive first uplink optical signals sent by one or more terminal devices and perform photoelectric conversion on the first uplink optical signals;

and sending the uplink combined data frame to an optical transmitter so that the optical transmitter performs electro-optical conversion on the uplink combined data frame to obtain a second uplink optical signal, and sending the second uplink optical signal to a sink node.

12. The method of claim 11, wherein the multiplexing the plurality of uplink electrical signals to generate an uplink combined data frame comprises:

respectively recovering the clock signals of the uplink electric signals sent by the plurality of optical receivers to obtain a plurality of clock signals, wherein the clock signals are used for indicating the transmission rate of the uplink electric signals;

distributing corresponding interleaved codes to each terminal device according to the target rate and the plurality of clock signals to obtain a distribution result, so that each terminal device uses the corresponding interleaved codes to bear the uplink electric signals of the terminal device;

coding is carried out on the basis of the uplink electric signal of each terminal device and the distribution result, and a plurality of data streams are obtained;

coupling the plurality of data streams to obtain the uplink combined data frame; wherein the frame header of the uplink combined data frame includes the allocation result, and the data portion of the uplink combined data frame includes the plurality of data streams.

13. The method according to claim 11 or 12, characterized in that the method further comprises:

and controlling the indicator light corresponding to the optical receiver according to the receiving condition of each optical receiver.

14. The method according to any one of claims 11 to 13, further comprising:

receiving a downlink electric signal sent by a downlink optical receiver; the downlink electrical signal is obtained after the downlink optical receiver receives a downlink optical signal sent by the sink node and performs photoelectric conversion on the downlink optical signal;

grouping the downlink electric signals to obtain multi-channel sub downlink electric signals, respectively sending the multi-channel sub downlink electric signals to a plurality of downlink optical transmitters, so that the plurality of downlink optical transmitters perform electro-optical conversion on the sub downlink electric signals to obtain sub downlink optical signals, sending the sub downlink optical signals to optical splitters connected with the downlink optical transmitters, respectively splitting the received sub downlink optical signals by the optical splitters to obtain multi-channel split sub downlink optical signals, and then respectively sending the multi-channel split sub downlink optical signals to the plurality of terminal devices.

15. A processing chip, comprising: a processor for performing the method of any one of claims 11 to 14.

16. A computer-readable storage medium having stored therein computer instructions which, when executed by a computer, cause the computer to perform the method of any one of claims 11 to 14.

17. A computer program product, characterized in that the computer program product comprises a computer program which, when run, causes the method according to any of claims 11-14 to be performed.