Multi-service multiplexing type multi-wavelength photoelectric conversion transmitting-receiving device

Abstract

The invention provides a multi-service multiplexing type multi-wavelength photoelectric conversion transmitting and receiving device, which comprises a multi-wavelength multi-channel optical fiber adaptation module with single-fiber three-wave access adaptation and double-fiber three-wave access adaptation functions; the one-way service photoelectric conversion module is used for realizing light-to-electricity conversion and receiving of broadcast stream one-way optical signals; a one-way service protocol conversion and forwarding unit; the bidirectional service photoelectric conversion transceiver module is used for buffering and amplifying a driving signal and a receiving signal of the transmitting laser; the multi-service multiplexing unit is used for receiving, multiplexing and forwarding one-way service data frames and two-way service data frames; and the network adaptation module and the user interface are used for realizing the access of a CPN network of a user. According to the scheme, the problems that when a communication service, a broadband internet service and a cable television service enter a home at the same time, the cable television service cannot be accessed to a home router, so that two local area networks exist in the home of a user, operation is not easy and convenient, and the home-entry cost is high are solved.

Description

Technical Field

[0001] The present application belongs to the field of multiplexing communication technology, and in particular relates to a multi-service multiplexing multi-wavelength optoelectronic conversion transceiver device. Background Art

[0002] Currently, with the convergence of communications, broadband internet, and broadcasting networks, and the vigorous promotion of fiber-to-the-home (FTTH), broadcasting networks are primarily adopting DVB (Digital Video Broadcasting) + PON (Passive Optical Network), IP broadcast + PON, or IPTV (Internet Protocol TV) models to provide users with communications, broadband internet, and broadcasting services. When implementing FTTH with IPTV, broadcasting networks completely abandon the independent transmission channel for broadcasting and television services, which inevitably fails to meet the demand for high-quality broadcasting and television services. In the DVB + PON and IP broadcast + PON solutions, broadcasting networks retain independent broadcast channels, ensuring secure broadcasting while delivering broadcast-grade quality for high-definition and ultra-high-definition 4K / 8K services. However, DVB+PON and IP broadcasting+PON technical solutions also have certain problems. In particular, in the DVB+PON solution, the TS stream passes through the existing cable TV frequency using QAM (Quadrature Amplitude Modulation) modulation technology. The transmission bit rate of one frequency is 38M, and the combined transmission rate of all effective frequencies is less than 3 GE. If a 4K program with a 36M bit rate is to be transmitted, one frequency can only transmit one 4K program. If an 8K program with a 120M bit rate is to be transmitted, at least three frequencies must be bound to transmit one 8K program. Although fiber-to-the-home has been achieved, the limitation of QAM frequencies cannot meet the demand for transmitting more ultra-high-definition 4K / 8K services.

[0003] Furthermore, in the DVB+PON solution, in addition to the above-mentioned frequency problem, there are also compatibility issues and high home access costs. Figure 1 The figure shows the principle diagram of the DVB+PON access network. Figure 1 It mainly consists of DVB broadcast optical signal amplifier 0101, PON network central office equipment 0110, single fiber home user 0114, dual fiber home user 0115 and ODN (Optical Distribution Network) between the central office and the user. Figure 1In the network, DVB broadcast is modulated onto a 1550nm optical wavelength for transmission, and enters the home together with the 1490nm downstream and 1310nm upstream wavelengths of the PON network. Therefore, there are two modes of home access: single-fiber three-wavelength and dual-fiber three-wavelength.

[0004] Depend on Figure 1 As can be seen, the single-fiber three-wavelength home optical signal carrying the 1550nm wavelength DVB broadcast and the PON network 1490nm / 1310nm wavelength optical signals carrying data services are combined in the combiner 0105 and then connected to the single-fiber home user 0114 through the home optical fiber 0108 carrying the three wavelengths of 1550nm / 1490nm / 1310nm. After being split by the demultiplexer 0116, the 1550nm wavelength broadcast signal is connected to the DVB set-top box 0117 and then to the TV set for listening to and watching radio and television programs. The 1490nm / 1310nm wavelength optical signal carrying data services is connected to the home gateway ONU 0119 of the PON network and then connected to application terminals such as mobile phones and computers through the home router to realize data service access.

[0005] In DF3W, the 1550nm broadcast signal and the 1490 / 1310nm PON optical signal carrying data services are not combined. The 1550nm broadcast signal enters the home via drop fiber 0109, while the 1490nm / 1310nm PON optical signal carrying data services enters the home via drop fiber 0113. Once in the home, DF3W users' indoor network is the same as that of single-fiber DF3W users. The 1550nm broadcast signal is connected to the DVB set-top box and then to the television for viewing broadcast programs. The 1490nm / 1310nm data signal is connected to the PON network's home gateway (the Optical Network Unit) and then to mobile phones, computers, and other application terminals through the home router for data service access.

[0006] exist Figure 1 In the example, a bidirectional access network cable 0118 is connected between the DVB set-top box 0117 and the home gateway ONU 0119, enabling the TV to receive and watch on-demand services in addition to broadcast services. The aforementioned network fully achieves the fiber-optic and bidirectional nature of the broadcasting and television network, providing users with triple-network convergence services. However, in addition to the frequency limitation mentioned above, several other issues remain:

[0007] 1) After DVB broadcasts are introduced into homes, they can only be viewed on TVs via DVB set-top boxes and cannot be accessed through routers to other terminals. This creates two completely incompatible networks within the home, essentially creating a separate PON network and broadcast network access solution, which lacks compatibility with a variety of terminals in the home.

[0008] 2) DVB+PON access network: Because the bidirectional service channel uses PON network technology, the PON network must be equipped with a home gateway ONU. However, multiple ONUs share the access bandwidth of a PON port through a 1:N optical splitter 0103, resulting in insufficient home bandwidth.

[0009] 3) Two networks enter the home independently. Operators equip users with home gateway ONU and DVB set-top boxes, which increases the cost of home access.

[0010] Further, such as Figure 2 The diagram shows the principle of IP broadcast + PON technology access network. Figure 2 and Figure 1 In comparison, the broadcast service is no longer a DVB standard QAM signal transmitted in the QAM modulation mode of the TS stream (transport stream), but an IP broadcast stream that is encapsulated in a UDP data frame according to the UDP protocol standard of the TCP / IP protocol and transmitted at a rate of 10G / 25G. At the same time, the access end no longer uses a DVB set-top box to receive the broadcast stream, but uses an IP broadcast + PON gateway formed by an IP broadcast stream receiving chip (ASIC) and an ONU gateway switching module to receive the IP broadcast stream. Figure 2 As shown, whether it is a single-fiber home user 0114 or a dual-fiber home user 0115, the user's home is equipped with a composite gateway 0207 and 0208 of an ONU module + an IP broadcast receiving module. The IP broadcast stream and data service are received through the composite gateway 0207 and 0208 of the ONU module + IP broadcast receiving module, and the TV is connected to the IP set-top box 0209 to watch TV programs. The user can also watch TV programs and access data services through user terminals such as mobile phones and computers.

[0011] Further, Figure 2 and Figure 1 Compared with the DVB+PON access network shown in the figure, Figure 2 The 10G / 25G rate is used to transmit IP broadcast streams, which is 4 to 8 times that of DVB broadcasting, which completely solves the problem of limited transmission rate in DVB broadcasting technology. At the same time, the terminal reception is through the IP broadcast or multicast to unicast reception mechanism, which also completely solves the problem of insufficient compatibility of DVB technology with two networks and multiple terminals in the home after it is introduced into the home. However, Figure 2The system shown is a transmission solution that superimposes a broadcast channel on a PON network. Because the bidirectional service channel uses PON network technology, the PON network must be equipped with a home gateway ONU, which has a high home access cost. Multiple ONUs share the access bandwidth of a PON port through a 1:N splitter, which may lead to insufficient home access bandwidth.

[0012] If the tree-structured PON network is replaced with a comb-structured network based on Ethernet technology in the above IP broadcast + PON technical solution, the problems of low home bandwidth and high home access costs in the PON network can be solved. At the same time, the problem of repeated investment caused by the continuous upgrading of the PON network due to the low home bandwidth can also be solved. Figure 3 The following is a comparison diagram of the tree-structured PON network and the comb-structured (star-structured) network based on Ethernet technology. Figure 3 In the figure, a is a schematic diagram of a tree-structured PON network. The PON network mainly consists of a PON network central office device 0110 (OLT), a shared optical fiber 0111, a 1:N optical splitter 0112, a home optical fiber 0113, and a home gateway ONU 0119. Figure 3 As shown in a) of Figure 1, N users on a 1:N optical splitter share the access bandwidth of a single PON port. Taking a GPON network as an example, when the downstream bandwidth of each OLT PON port is 2.5G and N=32, the average bandwidth allocated to each user is 2500M / 32=78M. If the concurrency rate is 30%, the concurrent bandwidth can reach 260M. Furthermore, PON technology uses a broadcast transmission method for downstream data and a time-division multiplexing mode for upstream data transmission. Therefore, users must be equipped with a carrier-owned gateway ONU to access the customer premises network (CPN), resulting in high access costs.

[0013] exist Figure 3 Figure b is a schematic diagram of a star-shaped network based on Ethernet technology. The star-shaped network mainly consists of Ethernet central office equipment 0301 and optical fiber 0302 for each user. Since each user has a dedicated user interface on the central office equipment, when the user interface rate is 1000M, each user can enjoy exclusive access to 1000M bandwidth. At the same time, since each user has a dedicated user interface on the central office equipment, the user's home does not need to be equipped with a home gateway owned by the operator. The user only needs to be equipped with an optical-to-electrical converter 0303 to access the user's electrical port WiFi router, or directly equipped with an optical fiber WiFi router 0304 to achieve access to multiple user terminals. Compared with the two, Figure 3 The access network shown in b has the advantages of high access bandwidth and low home access cost.

[0014] However, in Figure 3In the access network shown in b, the problem of superimposing IP broadcast to form an access network for integrated broadcast services is not solved. Summary of the Invention

[0015] The purpose of the present application is to provide a multi-service multiplexing multi-wavelength optoelectronic conversion transceiver device. Specifically, a multi-service multiplexing multi-wavelength optoelectronic conversion transceiver device is provided for the user end of a multi-service multiplexing exclusive optical fiber access network based on Ethernet technology, so as to solve the problems of the cable TV service being unable to access the home router when communication services, broadband Internet services and cable TV services are simultaneously introduced into the home, resulting in two local area networks in the user's home, inconvenient operation and high home access costs.

[0016] The present application provides a multi-service multiplexing multi-wavelength optoelectronic conversion transceiver device implemented as follows:

[0017] A multi-service multiplexing multi-wavelength optoelectronic conversion transceiver device includes: a multi-wavelength multi-channel optical fiber adapter module, a unidirectional service optoelectronic conversion module, a unidirectional service protocol conversion unit, a bidirectional service optoelectronic conversion transceiver module, a multi-service multiplexing unit, a network adapter module and a user interface, wherein:

[0018] The multi-wavelength, multi-channel optical fiber adapter module has single-fiber three-wavelength access adaptation and dual-fiber three-wavelength access adaptation functions. When the home optical fiber is a single-core optical fiber carrying 1550nm broadcast service and bidirectional service 1490nm / 1310nm three-wavelength optical signals, the multi-wavelength / multi-channel adapter module is configured to consist of a single-fiber adapter and a wavelength splitter. The wavelength splitter splits the unidirectional service optical wavelength to the unidirectional service optical-to-electrical conversion module, and splits the bidirectional service optical signal to the bidirectional service optical-to-electrical conversion transceiver module to achieve optical-to-electrical conversion and reception and forwarding of uplink and downlink data.

[0019] A unidirectional service optical-electrical conversion module, connected to the multi-wavelength multi-channel optical fiber adapter module, for realizing optical-to-electrical conversion and reception of unidirectional optical signals of the broadcast stream;

[0020] A unidirectional service protocol conversion unit, connected to the unidirectional service photoelectric conversion module, for implementing reception, caching, protocol conversion and forwarding of broadcast services;

[0021] A bidirectional business optoelectronic conversion transceiver module is connected to the multi-wavelength multi-channel optical fiber adapter module and is used for the electro-optical conversion and transmission of the uplink signal and the optoelectronic conversion, reception, buffering and amplification of the downlink optical signal;

[0022] A multi-service multiplexing unit, connected to the unidirectional service protocol conversion unit and the bidirectional service optoelectronic conversion transceiver module, for receiving, multiplexing and forwarding unidirectional service data frames and bidirectional service data frames;

[0023] The network adaptation module and the user interface are connected to the multi-service multiplexing unit and are used to implement user CPN network access.

[0024] In one embodiment, in a single-fiber three-wavelength-to-home scenario, the multi-wavelength multi-channel optical fiber adapter module is composed of an optical fiber adapter seat and a wave splitter. The three-wavelength optical signal formed by combining the 1550nm wavelength optical signal carrying the broadcast service signal and the 1490nm / 1310nm wavelength optical signal carrying the data service signal is connected to the optical fiber adapter seat through the home optical fiber and the LC adapter head, and is connected to the wave splitter for wave splitting. Among them, the 1550nm wavelength signal is connected to the unidirectional service optoelectronic conversion module through the first optical interface, and the 1490nm / 1310nm wavelength optical signal is connected to the bidirectional service optoelectronic conversion transceiver module through the second optical interface.

[0025] In one embodiment, in a dual-fiber three-wavelength-to-home scenario, the multi-wavelength multi-channel optical fiber adapter module is composed of a unidirectional service optical fiber adapter seat and a bidirectional service adapter seat, and the 1550nm wavelength optical signal carrying the broadcast service signal and the 1490nm / 1310nm wavelength optical signal carrying the data service signal are respectively connected to the optical fiber adapter seat through the first optical fiber and the second optical fiber and the LC adapter head, wherein the 1550nm wavelength signal is connected to the unidirectional service optoelectronic conversion module through the first optical interface, and the 1490nm / 1310nm wavelength optical signal is connected to the bidirectional service optoelectronic conversion transceiver module through the second optical interface.

[0026] In one embodiment, the unidirectional service optoelectronic conversion module includes: a photoelectric device PD, a transimpedance amplifier TIA and a limiting amplifier. After the input optical signal is converted into an electrical signal by the photoelectric device PD, it is connected to the transimpedance amplifier TIA for amplification and forming a differential signal, and then connected to the limiting amplifier for amplification and shaping, and is connected to the unidirectional service protocol conversion unit through its output interface.

[0027] In one embodiment, the bidirectional service optoelectronic conversion transceiver module includes: an access optical fiber, a transceiver optoelectronic conversion component, a laser drive circuit, a receiving amplifier circuit, and a monitoring circuit. The differential electrical signal of the data bit stream to be forwarded is connected to the drive circuit through the drive circuit input interface to realize the driving of the electro-optical conversion device LD. After the forwarded data bit stream is modulated to a 1310nm optical carrier by the laser LD, it is connected to the access optical fiber through a combiner / demultiplexer to realize the electro-optical conversion and forwarding of the data stream.

[0028] Correspondingly, in the receiving direction, the 1490nm wavelength optical carrier carrying the received data stream is connected to the optoelectronic device PD after passing through the combiner / demultiplexer. The optoelectronic device PD converts the received optical signal into an electrical signal, which is then connected to the input end of the transimpedance amplifier TIA. After amplification and shaping by the limiting amplifier, the differential signal of the bit stream is obtained through the output interface, realizing the optoelectronic conversion and reception of the received optical signal.

[0029] In one embodiment, the unidirectional service protocol conversion unit includes: an input interface, a management interface, a power interface, a baseband broadcast and QAM broadcast identification module, a QAM demodulation module, an IP broadcast / multicast stream input network interface module, a filtering and forwarding module, a main cache management module, a protocol conversion, encapsulation and forwarding module, a unicast data stream output network interface module, a user request network interface module, a user request and permission management and port mapping management module, a main storage module, a clock management module, a configuration management module, a power management module, a main control unit, a unicast stream output interface and a user request interface.

[0030] In one embodiment, the baseband broadcast and QAM broadcast identification module is connected to the output interface of the one-way service optoelectronic conversion module, and is used to receive the baseband broadcast or QAM broadcast stream signal output by the one-way service optoelectronic conversion module, and automatically identify the format of the input signal, and connect to the baseband IP broadcast receiving module or the QAM demodulation module according to the corresponding format, so as to realize the automatic identification and protocol conversion of broadcast services of different formats by the one-way service protocol conversion module.

[0031] In one embodiment, the IP broadcast / multicast stream input end network interface module includes: a PMA sublayer, a PCS sublayer, an MII interface layer, a MAC control layer, and an input buffer, wherein:

[0032] The PMA sublayer is used to reshape and recover the serial data stream and extract the synchronous clock. After recovering the serial data stream according to the extracted synchronous clock, it performs serial-to-parallel conversion on the serial data stream to obtain a parallel data stream and output it to the PCS sublayer.

[0033] The PCS sublayer is used to descramble and decode 64B / 66B codewords on parallel data streams according to the physical coding sublayer in the protocol, and remove the block synchronization header. After obtaining the complete Ethernet data frame, it is transmitted to the MAC control layer through the MII interface.

[0034] The MAC control layer is used to parse the Ethernet frame structure and write valid data packets into the input buffer after checking the frame integrity and filtering out invalid frames.

[0035] In one embodiment, the multi-service multiplexing unit includes: a unicast service interface, a data service interface, a unicast service network interface module, a data service network interface module, a main control module, a user-side network interface module, and a user-side interface, wherein:

[0036] The unicast service network interface module, the data service network interface module, and the user-side network interface module are composed of the physical layer. The unicast service network interface module is connected to the one-way service protocol conversion and forwarding module to enable communication between the user terminal and the one-way service protocol conversion and forwarding module and reception of the destination unicast stream; the data service network interface module is connected to the two-way service optoelectronic conversion and transceiver module to enable communication between the user and the management platform and the transmission and reception of communication services and broadband Internet services; the user-side network interface module is connected to the user network adaptation module to enable the transmission and reception of user-requested signaling services and the forwarding of communication services, broadband Internet services, and broadcast services.

[0037] The main control module includes: a logical plane control unit, a data plane control unit, and a forwarding matrix, which are used to implement VLAN management, MAC control layer management, and data forwarding. When a user requests a unicast service, the main control module forwards the request signaling to the unidirectional service protocol conversion unit, completing the forwarding of user authority management information between the unidirectional service protocol conversion unit and the platform, and receiving and forwarding the user's unicast stream. When a user requests a bidirectional service, the main control module forwards the user request signaling to the bidirectional service optoelectronic conversion transceiver module, implementing the reception and forwarding of user communication services and broadband Internet services, thereby realizing multi-service multiplexing, cross-connection, and fast forwarding functions.

[0038] The unicast service network interface module is connected to the unidirectional service protocol conversion unit through the unicast service interface, and the data service network interface module is connected to the bidirectional service optoelectronic conversion transceiver module through the data service interface;

[0039] The user-side network interface module is connected to the network adaptation module through the user-side interface and accesses the user CPN network through the user interface module.

[0040] In one embodiment, the network adaptation module includes: an impedance matching component and a signal isolation component, which are used to achieve impedance matching and signal isolation between the multi-service multiplexing unit and the user interface.

[0041] The multi-service multiplexing multi-wavelength optoelectronic conversion transceiver provided in the present application can provide communication services, broadband Internet data service interfaces and independent cable TV service interfaces on the service side. While implementing optoelectronic conversion for the optical signals of the accessed communication services, broadband Internet data services and cable TV services, it also implements protocol conversion for the broadcast signals of the cable TV services, thereby providing the user's local area network with unified protocols for communication services, broadband Internet services and cable TV services. This solves the problem that when communication services, broadband Internet services and cable TV services are simultaneously accessed into the home, the cable TV service cannot be accessed to the home router, resulting in two local area networks in the user's home, inconvenient operation and high access costs. Furthermore, since the multi-service multiplexing multi-wavelength optoelectronic conversion transceiver has the function of converting IP broadcast or DVB-C broadcast stream protocols, at the user's home, the communication network and the cable TV network are integrated into one network. The user can receive the broadcast services of the cable TV network on a variety of terminals and TVs, realizing the IP, bidirectional and fiber-optic cable network. Combined with the large-bandwidth access capability of the Ethernet technology-based access network and the 10G / 25G access bandwidth of the broadcast network, it provides users with high-definition, ultra-high-definition 4K / 8K, AR / VR video services and communication services, and broadband Internet services. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0043] Figure 1 2. It is a schematic diagram of the principle of a DVB broadcast + PON technology access network according to an embodiment of the present invention;

[0044] Figure 2 2. It is a schematic diagram of the principle of an IP broadcast + PON technology access network according to an embodiment of the present invention;

[0045] Figure 3 2. It is a schematic diagram comparing a tree-structured access network and a star-structured access network based on Ethernet technology according to an embodiment of the present invention;

[0046] Figure 4 2 is a schematic diagram showing the principle of a multi-service multiplexing multi-wavelength optoelectronic conversion transceiver according to an embodiment of the present invention;

[0047] Figure 5 This is a principle block diagram of a multi-service multiplexing single-fiber three-wavelength optoelectronic conversion transceiver according to an embodiment of the present invention;

[0048] Figure 6 This is a principle block diagram of a multi-service multiplexing dual-fiber three-wavelength optoelectronic conversion transceiver according to an embodiment of the present invention;

[0049] Figure 7 This is a principle block diagram of a unidirectional service photoelectric conversion module according to an embodiment of the present invention;

[0050] Figure 8 This is a principle block diagram of a bidirectional service optoelectronic conversion transceiver module according to an embodiment of the present invention;

[0051] Figure 9 This is a principle block diagram of a unidirectional service protocol conversion and forwarding unit according to an embodiment of the present invention;

[0052] Figure 10 This is a principle block diagram of a unidirectional and bidirectional service channel multiplexing unit according to an embodiment of the present invention;

[0053] Figure 11 2. It is a schematic diagram of the principle of Ethernet technology star structure access network + IP broadcast access network according to an embodiment of the present invention;

[0054] Reference numerals in the above drawings:

[0055] 0101, DVB broadcast optical signal amplifier; 0103, 1:N optical splitter; 0105, combiner; 0107, 1:N optical splitter; 0108, three-wavelength home fiber; 0109, home fiber; 0110, PON network central office equipment; 0111, shared fiber; 0112, 1:N optical splitter; 0113, home fiber; 0114, single-fiber home user; 0115, dual-fiber home user; 0116, splitter; 0117, DVB set-top box 0118, bidirectional access network cable; 0119, home gateway ONU; 0120, home router; 0201, access network central office IP broadcast stream transmitter; 0207, composite gateway; 0208, composite gateway; 0209, IP set-top box; 0301, Ethernet central office equipment; 0302, user-exclusive optical fiber; 0303, photoelectric converter; 0304, optical fiber WiFi router; 0401, multi-wavelength / multi-channel optical fiber adapter module; 0402, optical interface; 0403, unidirectional service optical-to-electrical conversion module; 0404, interface; 0405, unidirectional service protocol conversion and forwarding unit; 0406, unicast service interface; 0407, optical interface; 0408, bidirectional service optical-to-electrical conversion transceiver module; 0409, data service interface; 0410, multi-service multiplexing unit; 0411, user-side interface; 0412, network adapter module; 0413, user interface; 0501, home fiber; 0502, LC adapter; 0503, optical fiber Adapter; 0504, Wavelength Splitter; 0601, Optical Fiber; 0701, Receive Optical Component (ROSA); 0702, Limiting Amplifier; 0703, Differential Signal Output Interface; 0704, Signal Detection Circuit; 0705, Optical Signal Detection Interface; 0801, Receive / Receive Photoelectric Conversion Circuit; 0802, Burst Laser Drive Signal Amplifier; 0803, Optical Power Monitoring / Control; 0804, Limiting Amplifier; 0805, Signal Detection Circuit; 0808IN, Data Service interface; 0808OUT, data service interface; 0901, management interface; 0902, power interface; 0903, baseband broadcast and QAM broadcast identification module; 0904, QAM demodulation module; 0905, IP broadcast / multicast stream input network interface module; 0906, filtering and forwarding module; 0907, primary cache management module; 0908, protocol conversion, encapsulation and forwarding module; 0909, unicast data frame output network interface module; 0910, user request network Interface module; 0911, user request, authority management and port mapping management module; 0912, main storage module; 0913, clock management module; 0914, configuration management module; 0915, power module; 0916, main control module; 0406T, unicast stream output interface; 0406R, user request input interface; 1001, unicast service network interface module; 1002, data service network interface module; 1003, main control module; 1004, clock synchronization module;1005, storage module; 1006, management module; 1007, user-side network interface module; 1008, power module; 1101, single-core optical fiber; 1102, single-fiber three-wavelength optical-to-electrical conversion transceiver; 1103, dual-fiber three-wavelength optical-to-electrical conversion transceiver. DETAILED DESCRIPTION

[0056] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0057] In this example, a multi-service multiplexing multi-wavelength optoelectronic conversion transceiver is provided. A multi-wavelength multi-channel optical fiber interface is provided on the core network side, which can realize optical fiber access to the access network of communication services, broadband Internet services, IP broadcasting or DVB-C cable TV services. The multi-service multiplexing multi-wavelength optoelectronic conversion transceiver has the function of optoelectronic conversion of optical signals for communication services, broadband Internet services and IP broadcasting or DVB-C cable TV services. After converting IP broadcasting or DVB-C cable TV services into a unicast protocol compatible with multiple home terminals, the IP broadcasting or DVB-C cable TV services are connected to the home electrical port router together with the communication services and broadband Internet services, thereby solving the problem of insufficient compatibility in the home network of IP broadcasting or DVB-C cable TV services.

[0058] Furthermore, a network interface is provided on the user side of the multi-service multiplexing multi-wavelength optoelectronic conversion transceiver, which can be connected to the user-side electrical interface wireless router, and the IP broadcast or DVB-C cable TV service and communication service and broadband Internet service converted into a unicast protocol are uniformly connected to the home wireless router. Through a CPN (customer premises network) of the home wireless router, the user's local area network is provided with communication services, broadband Internet services and cable TV services for multiple terminals with unified protocols, thereby completely solving the problem that when communication services, broadband Internet services and cable TV services are simultaneously introduced into the home, the cable TV service cannot be connected to the home router, resulting in two local area networks in the user's home, inconvenient operation and high home access costs.

[0059] The multi-service multiplexing multi-wavelength optoelectronic conversion transceiver device may include: a multi-wavelength / multi-channel optical fiber adapter module, a unidirectional service optoelectronic conversion module, a unidirectional service protocol conversion and forwarding unit, a bidirectional service optoelectronic conversion transceiver module, a multi-service multiplexing unit, a network adapter module, and a user interface, wherein:

[0060] 1) Multi-wavelength / multi-channel optical fiber adapter module, which provides single-fiber triple-wavelength or dual-fiber triple-wavelength access interfaces based on single-fiber or dual-fiber access scenarios to meet the adaptation requirements of access networks in different scenarios;

[0061] 2) The unidirectional service optical-to-electrical conversion module provides a 10G / 25G single-wavelength unidirectional service optical fiber access interface and is composed of an optical-to-electrical conversion device and a signal amplification circuit. It performs optical-to-electrical conversion and reception of the 10G / 25G single-wavelength unidirectional service optical signal.

[0062] 3) One-way service protocol conversion and forwarding unit, which may include: baseband broadcast and QAM broadcast identification module, QAM demodulation module, IP broadcast / multicast stream network interface module, filtering and forwarding module, main cache management module, protocol conversion encapsulation and forwarding module, unicast data frame output network interface module, user request network interface module, user request permission management and port mapping management module, main control module, main storage module, clock management module, power supply module, among which:

[0063] 3-1) Baseband IP broadcast or QAM broadcast identification module, automatically identifies the input signal format and connects it to the baseband IP broadcast receiving module or QAM demodulation module in the corresponding format, so as to realize the automatic identification and protocol conversion of broadcast services of different formats by the single service protocol conversion module; QAM demodulation module, used to realize frequency filtering, QAM demodulation, TS stream caching and other functions; IP broadcast / multicast stream network interface module, which consists of PMA (Physical Media Adaptation Layer) sublayer, PCS (Physical Coding Layer), MII interface (Media Independent Interface), MAC (Media Access Control The MAC control layer consists of a media access control (MAC) layer and an input buffer to shape the differential electrical signals of the connected IP broadcast or multicast stream, extract the synchronous clock, perform serial-to-parallel conversion, descramble, and perform 64B / 66B decoding. After removing block synchronization and restoring the complete data frame, it is written to the input buffer via the MAC control layer for reading by the filtering and forwarding module. The filtering and forwarding module is used to read the target program stream data frame from the input buffer according to the user request filtering conditions given by the main control, strip off the header and tail of the data frame, and store only the payload in the main buffer. The above-mentioned main buffer module can use a ring buffer mechanism to cache the Ethernet frame payload written by the filtering and forwarding module in a partitioned and timed manner so that it can be read by the protocol encapsulation module.

[0064] 3-2) The protocol conversion, encapsulation and forwarding module is used to read the UDP multicast IP packets of the destination program stream from the main cache according to the user request, encapsulate them into unicast IP packets according to the port binding mechanism provided by the master control, and write them into the output cache for output to the interface layer for reading and forwarding;

[0065] 3-3) The unicast data frame output network interface module may include: a MAC control layer, an MII interface layer, and a physical layer. The MAC control layer reads the unicast IP packets encapsulated according to user requirements by the protocol conversion, encapsulation, and forwarding module and writes them into the output buffer, adds the Ethernet header and trailer, encapsulates them into unicast data frames, and forwards them to the multi-service multiplexing unit;

[0066] 3-4) The user request network interface module may include: a physical layer, an MII interface, a MAC control layer, and an input buffer. Upon receiving a user request data frame, it performs serial-to-parallel conversion and descrambling decoding, and then writes it to the input buffer through its MAC control layer for reading and processing by the corresponding functional module.

[0067] 3-5) User request rights management and port mapping management module, which is used to parse user rights, user requests, and multicast stream port binding conditions. After forming the filtering and unicast stream encapsulation mapping relationship of the user request destination multicast stream, it provides it to the main control module for management of the filtering and forwarding module and the protocol conversion and forwarding module.

[0068] 3-6) The main control module may include: a main control CPU, a forwarding matrix, and a control unit. It is the core control module of the unidirectional service protocol conversion and forwarding unit, thereby realizing unit configuration management, user authority management, port mapping management, filtering and encapsulation management, and data forwarding. It ensures that the unidirectional service protocol conversion and forwarding unit can bind user authority according to the live service system port to quickly complete the protocol conversion, encapsulation, and forwarding of the destination multicast stream.

[0069] 4) Bidirectional business optoelectronic conversion transceiver module, which can provide bidirectional 1G or 10G dual-wavelength bidirectional business optical fiber access interface, and consists of optoelectronic conversion device, drive circuit and signal receiving amplifier circuit, to achieve electro-optical conversion of sending signal and optoelectronic conversion and reception of sending and receiving optical signals;

[0070] 5) The multi-service multiplexing unit may include: network interface module 1, network interface module 2 and network interface module 3, main control module, storage module, clock synchronization module, management module and power supply module, wherein:

[0071] 5-1) Network interface module 1 is connected to the one-way service protocol conversion and forwarding module to realize communication between the user terminal and the one-way service protocol conversion and forwarding module and reception of the destination unicast stream; network interface module 2 is connected to the two-way service optoelectronic conversion and transceiver module to realize communication between the user and the management platform and the transmission and reception of communication services and broadband Internet services; network interface module 3 is connected to the user network adaptation module to realize the transmission and reception of user-requested signaling services, communication services, broadband Internet services and forwarding of broadcast services (unicast streams).

[0072] 5-2) The main control module may include a logical plane control unit, a data plane control unit, and a forwarding matrix, which implement VLAN management, MAC control layer management, and data forwarding. When a user requests unicast services, the request signaling is forwarded to the protocol conversion module to complete the forwarding of user rights management information between the protocol conversion module and the platform, as well as the reception and forwarding of user unicast streams. When a user requests bidirectional services, the user request signaling is forwarded to the bidirectional service interface module to receive and forward user communication services and broadband Internet services, thereby realizing multi-service multiplexing, cross-connection, and forwarding functions.

[0073] 6) The network adaptation module may include: an impedance matching component and a signal isolation component, which are used to achieve impedance matching and signal isolation between the multi-service multiplexing unit and the user interface.

[0074] The above-mentioned multi-service multiplexing multi-wavelength optoelectronic conversion transceiver can provide communication services, broadband Internet data service interfaces and independent cable TV service interfaces on the service side. While realizing optoelectronic conversion for the accessed communication services, broadband Internet data services and cable TV service optical signals, it also realizes protocol conversion for the broadcast signals of the cable TV service, providing the user's local area network with unified protocols for communication services, broadband Internet services and cable TV services, and completely solving the problem that when communication services, broadband Internet services and cable TV services are simultaneously introduced into the home, the cable TV service cannot be connected to the home router, resulting in two local area networks in the user's home, inconvenient operation and high access costs. Different from the existing optoelectronic conversion transceiver, the multi-service multiplexing multi-wavelength optoelectronic conversion transceiver provided in this example can not only realize the optoelectronic conversion, reception and forwarding of data service, broadband Internet and communication service signals, but also for radio and television multicast streams or broadcast streams, after converting the multicast or broadcast streams into unicast streams, they can be connected to the user's CPN network, thereby achieving the purpose of converged access based on the Ethernet technology data service network superimposed on the IP broadcast network, solving the problems of insufficient data service bandwidth and broadcast service bandwidth in the existing DVB+PON network, as well as the high home access cost and insufficient terminal equipment compatibility. At the same time, it also overcomes the problems of insufficient data service bandwidth and high home access cost in the IP broadcast + PON network.

[0075] The above method is described below in conjunction with a specific embodiment. However, it is worth noting that this specific embodiment is only for better illustrating the present application and does not constitute an improper limitation to the present application.

[0076] In this example, a multi-service multiplexing multi-wavelength optoelectronic conversion transceiver is provided. The service side of the device provides a channel adaptation module for access to independent channels of broadband Internet services, communication services and cable TV services. The user side provides network interfaces including but not limited to access to the user's home WiFi router, IP set-top box and smart TV. It can realize seamless connection between the multi-service access network based on Ethernet technology star structure access network + IP broadcast and the user's CPN network. In this way, it can realize optical to electrical and electrical to optical optoelectronic conversion of upstream and downstream signals, and protocol conversion of IP broadcast streams or DVB broadcast streams transmitted in the cable TV network, thereby solving the problem of insufficient compatibility of cable TV broadcast services in home networks, and can well adapt to the service requirements of various terminals for multiple services. It can realize access based on Ethernet technology data network superimposed on IP broadcast or DVB-C network. Users can receive Internet services, communication services and broadcast and television services through the Ethernet technology star network at the same time. Furthermore, since the multi-service multiplexing multi-wavelength optoelectronic conversion transceiver has the function of converting IP broadcast or DVB-C broadcast stream protocols, at the user's home, the communication network and the cable TV network are integrated into one network. The user can receive the broadcast services of the cable TV network on a variety of terminals and TVs, realizing the IP, bidirectional and fiber-optic cable network. Combined with the large-bandwidth access capability of the Ethernet technology-based access network and the 10G / 25G access bandwidth of the broadcast network, it provides users with high-definition, ultra-high-definition 4K / 8K, AR / VR video services and communication services, and broadband Internet services.

[0077] Specifically, such as Figure 4 As shown, the multi-service multiplexing multi-wavelength optical-to-electrical conversion transceiver device provided in this example may include: a multi-wavelength / multi-channel optical fiber adapter module 0401, a unidirectional service optical-to-electrical conversion module 0403, a unidirectional service protocol conversion and forwarding unit 0405, a bidirectional service optical-to-electrical conversion transceiver module 0408, a multi-service multiplexing unit 0410, a network adapter module 0412, and a user interface 0413, wherein:

[0078] The multi-wavelength / multi-channel fiber adapter module 0401 provides both single-fiber and dual-fiber triple-wavelength access adaptation. When the single-fiber drop-in fiber carries three wavelengths of optical signals, including 1550nm broadcast services and 1490nm / 1310nm bidirectional services, the multi-wavelength / multi-channel adapter module consists of a single-fiber adapter and a wavelength splitter. The wavelength splitter splits the unidirectional service optical wavelength to the unidirectional service optical-to-electrical conversion module, and splits the bidirectional service optical signal to the bidirectional service optical-to-electrical conversion transceiver module, achieving optical-to-electrical conversion and receiving and forwarding of uplink and downlink data.

[0079] The unidirectional optical-to-electrical conversion module 0403, consisting of a unidirectional ROSA (Receiver Optical Subassembly) and a receiving circuit, implements optical-to-electrical conversion and reception of unidirectional optical signals in broadcast streams.

[0080] The unidirectional service protocol conversion and forwarding unit 0405 consists of a baseband IP broadcast and QAM broadcast identification module, a QAM demodulation module, a baseband IP broadcast / multicast stream network interface module, a filtering and forwarding module, a primary cache management module, a protocol conversion, encapsulation and forwarding module, a user request and permission management and port mapping management module, a primary storage module, a clock management module, a configuration management module, and a power management module. It is used to implement the optical-electrical conversion reception, caching, protocol conversion and forwarding functions of the broadcast service.

[0081] The bidirectional business photoelectric conversion transceiver module 0408 is composed of a bidirectional photoelectric conversion component, a laser driving circuit, a receiving signal and a buffer amplifier circuit, which realizes the driving of the transmitting laser and the buffer amplification of the receiving signal.

[0082] The multi-service multiplexing unit 0410 is composed of a physical layer network interface unit, a storage unit, a main control unit, a clock synchronization unit, a management module, and a power supply module. It is used to realize the reception, multiplexing and forwarding functions of unidirectional and bidirectional service data frames.

[0083] The network adaptation module 0412 and the user interface 0413 are composed of a physical layer medium adaptation circuit, an isolation circuit, and a user interface, which enable the user to access the CPN network and can provide multiple interfaces including but not limited to accessing WiFi routers, IP set-top boxes, and smart TVs.

[0084] Specifically, the multi-wavelength / multi-channel optical fiber adapter module 0401 provides a single-fiber three-wavelength or dual-fiber three-wavelength adapter interface according to the incoming optical fiber, so that the one-way service optoelectronic conversion module 0403 and the two-way service optoelectronic conversion transceiver module 0408 are connected to the incoming optical fiber, realizing optical-to-electrical and electrical-to-optical optoelectronic conversion of the optical signal connected to the user.

[0085] like Figure 5The figure shows a single-fiber triple-wavelength-to-the-home scenario. Multi-wavelength / multi-channel fiber adapter module 0401, consisting of fiber adapter 0503 and splitter 0504, combines the 1550nm wavelength optical signal carrying broadcast service signals and the 1490 / 1310nm wavelength optical signals carrying data service signals into a three-wavelength optical signal. This signal is connected to fiber adapter 0503 via drop fiber 0501 and LC adapter 0502, and then to splitter 0504 for splitting. The 1550nm wavelength signal is connected to unidirectional service optoelectronic conversion module 0403 via optical interface 0402, and the 1490 / 1310nm wavelength signal is connected to bidirectional service optoelectronic conversion transceiver module 0408 via optical interface 0407.

[0086] like Figure 6 The figure shows a dual-fiber, three-wavelength-to-the-home (DTH) scenario. Multi-wavelength / multi-channel fiber adapter module 0401 consists of LC adapter head 0502 (a unidirectional service fiber adapter and a bidirectional service adapter). The 1550nm wavelength optical signal carrying broadcast service signals and the 1490 / 1310nm wavelength optical signal carrying data service signals are connected to fiber adapter head 0503 via optical fiber 0601, user-only optical fiber 0302, and LC adapter head 0502, respectively. The 1550nm wavelength signal is connected to unidirectional service optoelectronic conversion module 0403 via optical interface 0402, and the 1490 / 1310nm wavelength optical signal is connected to bidirectional service optoelectronic conversion transceiver module 0408 via optical interface 0407.

[0087] above Figure 5 The multi-service multiplexing multi-wavelength optoelectronic conversion transceiver shown is suitable for single-fiber three-wavelength home access scenarios. Figure 6 The multi-service multiplexing multi-wavelength optoelectronic conversion transceiver shown is suitable for the dual-fiber three-wavelength home access scenario. The main difference between the two is the multi-wavelength / multi-channel optical fiber adapter module 0401.

[0088] Depend on Figure 4 、 Figure 5 and Figure 6 It can be seen that the optical carrier carrying the unidirectional service is connected to the unidirectional service optoelectronic conversion module 0403 through the optical interface 0402, and after optoelectronic conversion, is connected to the unidirectional service protocol conversion and forwarding unit 0405 through the interface 0404. The unidirectional service protocol conversion and forwarding unit 0405 encapsulates the destination broadcast stream into a unicast stream according to the user's program viewing and listening request, and forwards it to the multi-service multiplexing unit 0410 through the unicast service interface 0406. The multi-service multiplexing unit forwards the program stream requested by the destination user to the network adaptation module 0412 through the user side interface 0411, and forwards it to the user access terminal through the user interface 0413, thereby realizing the viewing and listening of radio and television programs.

[0089] The 1490nm wavelength optical carrier signal that carries communication services and broadband Internet services is connected to the bidirectional service optoelectronic conversion transceiver module 0408 through the optical interface 0407 connected to the optical fiber. The electrical signal after optoelectronic conversion is connected to the multi-service multiplexing unit 0410 through the data service interface 0409. The multi-service multiplexing unit forwards the data service flow requested by the destination user to the network adaptation module 0412 through the user-side interface 0411, and forwards it to the user access terminal through the user interface 0413, thereby realizing communication and broadband Internet services.

[0090] like Figure 7 The figure shows the internal schematic of the unidirectional service optical-to-electrical conversion module 0403. The module primarily consists of a receiving optical assembly (ROSA) 0701, which includes a photoelectric device (PD) and a trans-impedance amplifier (TIA); a limiting amplifier 0702; a differential signal output interface 0703; and a signal detection circuit 0704. The PD converts the input optical signal into an electrical signal, which is then amplified by the TIA to form a differential signal. The signal is then further amplified and shaped by the limiting amplifier and output to the protocol conversion unit via the differential signal output interface 0703. The module also provides an optical signal detection interface 0705, which provides the control system with real-time detection signals for the input optical signal.

[0091] like Figure 8 Figure 1 shows the structure of bidirectional optical-to-electrical conversion transceiver module 0408, which primarily consists of access fiber 0407, transceiver optical-to-electrical conversion circuit 0801, burst laser drive signal amplifier 0802, optical power monitoring / control circuit 0803, limiting amplifier 0804, and signal detection circuit 0805. The differential electrical signal of the data bit stream to be forwarded is connected to burst laser drive signal amplifier 0802 via data service interface 0808IN, driving electro-optical conversion device LD. The forwarded data stream is then modulated to a 1310nm optical carrier by laser LD and then connected to access fiber 0407 via a wavelength combiner / demultiplexer, achieving electro-optical conversion and data forwarding. In the receiving direction, the 1490nm wavelength optical carrier carrying the received data stream is connected to the optoelectronic device PD after passing through the combiner / demultiplexer. The optoelectronic device PD converts the received optical signal into an electrical signal, which is then connected to the input of the transimpedance amplifier TIA. After amplification and shaping by the limiting amplifier 0804, the differential signal of the bit stream is obtained through the data service interface 0808OUT, realizing the optoelectronic conversion and reception of the received optical signal.

[0092] like Figure 9The figure shows a schematic diagram of the structure of a unidirectional service protocol conversion unit. The unidirectional service protocol conversion and forwarding unit 0405 may include: an interface 0404, a management interface 0901, a power interface 0902, a baseband broadcast and QAM broadcast identification module 0903, a QAM demodulation module 0904, an IP broadcast / multicast stream input end network interface module 0905, a filtering and forwarding module 0906, a primary buffer management module 0907, a protocol conversion, encapsulation and forwarding module 0908, a unicast data frame output network interface module 0909, a user request network interface module 0910, a user request, permission management and port mapping management module 0911, a primary storage module 0912, a clock management module 0913, a configuration management module 0914, a power module 0915, a main control module 0916, a unicast stream output interface 0406T, and a user request input interface 0406R. Among them:

[0093] The baseband broadcast and QAM broadcast identification module 0903 provides an interface 0404 (10G / 25G optional rate SerDes output interface), which is connected to the output interface of the unidirectional service optoelectronic conversion module 0403. It receives the baseband broadcast or QAM broadcast stream signal output by the unidirectional service optoelectronic conversion module 0403, automatically identifies the format of the input signal, and connects it to the baseband IP broadcast receiving module or the QAM demodulation module according to the corresponding format, thereby realizing the automatic identification and protocol conversion of broadcast services of different formats by the single service protocol conversion module.

[0094] The QAM demodulation module 0904 implements functions such as frequency filtering, QAM carrier frequency demodulation, and TS stream caching.

[0095] Furthermore, the IP broadcast / multicast stream input end network interface module 0905 is composed of the PMA sublayer (Physical Medium Attachment sublayer), PCS sublayer (Physical Coding Sublayer), MII interface layer, MAC control layer and input buffer (Rx Buffer).

[0096] The PMA sublayer reshapes and recovers the serial data stream and extracts the synchronous clock. After recovering the serial data stream according to the extracted synchronous clock, it performs serial-to-parallel conversion on the serial data stream to obtain a parallel data stream and outputs it to the PCS sublayer.

[0097] The PCS sublayer descrambles and decodes 64B / 66B codewords on the parallel data streams according to the physical coding sublayer specifications in IEEE802.3ae, removes the block synchronization header, and obtains a complete Ethernet data frame, which is then transmitted to the MAC control layer through the MII interface.

[0098] The MAC control layer parses the Ethernet frame structure (such as source / destination MAC address and frame type), verifies frame integrity (CRC check), filters invalid frames, and writes valid data packets into the receive buffer (Rx Buffer). The buffer caches data streams in a first-in-first-out manner. In addition, regardless of whether the data in the buffer is read or not, the first-in data is overwritten by the last-in data at a certain time.

[0099] The core task of the unidirectional service protocol conversion and forwarding unit 0405 is to write all multicast streams in the receive buffer (RxBuffer) of the above MAC layer, convert the destination broadcast stream into a unicast stream according to the user's request, and forward it to the destination user through the unicast output network interface.

[0100] First, it's crucial to ensure that the IP broadcast stream or DVB-C QAM-modulated broadcast stream received by the multi-service multiplexing optical-to-electrical conversion transceiver is the broadcast service transmitted by the front-end platform to users. This baseband IP broadcast stream is a multicast stream of all programs, without IGMP enabled. It is input to the input of the multi-service multiplexing optical-to-electrical conversion transceiver via a flooding mechanism. After optical-to-electrical conversion, the target program is converted into a unicast stream based on user request and forwarded to the destination user. Furthermore, the system can employ a non-dynamic port binding mechanism. Specifically, the EPG (Electronic Program Guide) clearly defines the mapping between the platform's multicast address and port address for broadcast programs and the source IP address and port address after protocol conversion. This mapping is static. As long as programs remain unchanged, the port binding remains fixed. Only when programs are added or removed does the front-end centrally adjust and update the EPG data.

[0101] For example, the port binding instance for the platform to broadcast 200 sets of IP radio programs is:

[0102] CCTV-1:239.1.1.1:5000~XXTV-X:2391.1.200:5000,

[0103] 239.1.1.1:5000 to 2391.1.200:5000 are the multicast addresses and destination port numbers for 200 programs, and the system statically binds source port numbers 6000 to 6199 for unicast streams. Assuming the protocol converter IP address is 192.168.10.100 and the user device IP address is 192.168.1.101, the specific implementation process may include:

[0104] S1: User initiates a request:

[0105] The user clicks "CCTV-1" through the EPG and uses the browser to access the fixed URL http: / / 192.168.10.100:6000. After receiving the user request through its user request input interface 0406R, the network interface module 0910 forwards the user request and authority management and port mapping management module 0911.

[0106] S2: HTTP redirect:

[0107] After verifying the permissions, the user request and permission management and port mapping management modules return the unicast stream address (actually still 192.168.10.100:6000).

[0108] S3: Player connection:

[0109] The user device (e.g., VLC) initiates a UDP connection request to port 6000 of the cache.

[0110] S4: Filtering and caching of data frames:

[0111] The user request, permission management and port mapping management module 0911 forwards the port mapping relationship of the user requested program to the filtering and forwarding module 0906 and the protocol conversion encapsulation and forwarding module 0908 through the main control module 0916. After obtaining the 239.1.1.1:5000 corresponding to the filtering condition 192.168.10.100:6000, the filtering and forwarding module 0906 filters out the UDP payload of 239.1.1.1:5000 from the input cache and forwards it to the main cache management module 0907.

[0112] S5: Multicast to unicast:

[0113] After receiving the unicast encapsulation parameters from the master, protocol conversion, encapsulation, and forwarding module 0908 reads the UDP payload at 239.1.1.1:5000 from primary cache management module 0907 and encapsulates it into a unicast UDP packet: Source IP: protocol converter IP (192.168.10.100), Source Port: statically bound port (e.g., 6000), Destination IP: user device IP (192.168.1.101), Destination Port: random user device port (e.g., 50000). After encapsulation, it is forwarded to the output buffer (Tx Buffer) of unicast data frame output network interface module 0909.

[0114] S6: Encapsulation and forwarding of unicast data frames:

[0115] After the MAC layer of the unicast data frame output network interface module 0909 reads the message from the output buffer (Tx Buffer), it loads the frame header and frame trailer and performs 64B / 66B encoding through the physical layer PCS sublayer. After serialization through the PMA sublayer, it is connected to the multi-service multiplexing unit 0410 through its unicast stream output interface 0406T. The multi-service multiplexing unit 0410 forwards it to the network adaptation module 0412 through the user-side interface 0411, and then forwards it to the user equipment through the user interface 0413.

[0116] S7: Traffic replication and transmission:

[0117] If multiple users request the same port (such as 6000) at the same time, the unicast data stream output network interface module 0909 copies an independent unicast stream for each user and sends data in parallel through multi-threading or multiple queues of the unicast data stream output network interface module.

[0118] S8: Multi-terminal request:

[0119] Both the filtering and forwarding module 0906 and the protocol conversion, encapsulation and forwarding module 0908 are provided with multiple sets of filters and multi-core and multi-threaded encapsulation functions, which can meet the broadcast service requests of multiple terminals of the access user.

[0120] S9: Session maintenance and termination:

[0121] The user player sends heartbeat packets (such as RTCP packets) regularly, and the user request, rights management and port mapping management module 0911 updates the session active time. If the user stops playing and there is no heartbeat, the terminal stops sending data.

[0122] like Figure 10 Figure 1 shows the structure of the multi-service multiplexing unit 0410, which consists of a unicast service interface 0406, a data service interface 0409, a unicast service network interface module 1001 (network interface module 1), a data service network interface module 1002 (network interface module 2), a main control module 1003, a clock synchronization module 1004, a storage module 1005, a management module 1006, a user-side network interface module 1007 (network interface module 3), a power supply module 1008, and a user-side interface 0411. Specifically:

[0123] The unicast service network interface module 1001, the data service network interface module 1002 and the user-side network interface module 1007 are composed of a physical layer. Among them, the unicast service network interface module 1001 is connected to the one-way service protocol conversion and forwarding module to realize the communication between the user terminal and the one-way service protocol conversion and forwarding module and the reception of the destination unicast stream; the data service network interface module 1002 is connected to the two-way service optoelectronic conversion and transceiver module to realize the communication between the user and the management platform and the transmission and reception of communication services and broadband Internet services; the user-side network interface module 1007 is connected to the user network adaptation module to realize the transmission and reception of user-requested signaling services, communication services, broadband Internet services and forwarding of broadcast services (unicast streams).

[0124] Main control module 1003, consisting of a logical plane control unit, a data plane control unit, and a forwarding matrix, implements VLAN management, MAC control layer management, and data forwarding. When a user requests unicast services, the request signaling is forwarded to the protocol conversion module, which confirms user rights management information between the protocol conversion module and the platform, and receives and forwards the user's unicast stream. When a user requests bidirectional services, the user request signaling is forwarded to the bidirectional service interface module, which receives and forwards user communication services and broadband Internet services, thereby enabling multi-service multiplexing, cross-connection, and fast forwarding.

[0125] The unicast service network interface module 1001 and the data service network interface module 1002 are connected to the unidirectional service protocol conversion and forwarding unit 0405 and the bidirectional service optoelectronic conversion and transceiver module 0408 through the unicast service interface 0406 and the data service interface 0409, respectively. At the same time, the user-side network interface module 1007 is connected to the network adaptation module 0412 through the user-side interface 0411 and accesses the user CPN network through the user interface module 0413. Its main tasks are:

[0126] For user broadband Internet services and communication service requests and services forwarded to users by the service platform, data frame parsing, address table management and VLAN management are implemented through the MAC control layer of the multi-service multiplexing unit. Through its main control module, data frames are quickly received and forwarded to the user CPN network within the VLAN defined by the data service interface 0409 and the user side interface 0411, and access is provided to various terminals through the home router 0120.

[0127] For the user's multicast service request and the destination unicast stream converted by the protocol conversion unit, after the data frame encapsulation is implemented through the MAC control layer of the multi-service multiplexing unit, it is forwarded to the user's CPN network within the VLAN defined by the unicast service interface 0406 and the user-side interface 0411 through its main control module, and is accessed to the TV or other application terminals through the home router 0120.

[0128] In one embodiment, the multi-service multiplexing multi-wavelength optoelectronic conversion transceiver device can be as follows: Figure 11 As shown, it consists of an IP broadcast stream transmitter 0201 at the access network central office, a single-fiber three-wavelength optical-electrical conversion transceiver 1102 and a dual-fiber three-wavelength optical-electrical conversion transceiver 1103 based on an Ethernet central office device 0301, a central office-to-user ODN, and a user end. The single-fiber three-wavelength optical-electrical conversion transceiver 1102 is suitable for the scenario where the 1550nm wavelength of the broadcast service and the 1490nm / 1310nm wavelength of the data service upstream and downstream are combined by the combiner 0105 and then enter the home through the single-core optical fiber 1101. The dual-fiber three-wavelength optical-electrical conversion transceiver 1103 is suitable for the scenario where the optical signals carrying the 1550nm wavelength of the broadcast service and the optical signals carrying the 1490nm / 1310nm wavelength of the data service upstream and downstream are respectively entered into the home through the user's exclusive optical fiber 0302. The multi-service multiplexing single-fiber three-wavelength optical-to-electrical conversion transceiver 1102 and dual-fiber three-wavelength optical-to-electrical conversion transceiver 1103 have the same functional modules except that the home scenarios are single-fiber three-wavelength and dual-fiber three-wavelength.

[0129] The above-mentioned multi-service multiplexing multi-wavelength optoelectronic conversion transceiver device can multiplex user signaling for communication services, broadband services, and data services and forward them to the access network, and connect the data services forwarded to users through the access network to the user CPN network. During the forwarding process, the MAC control layer of the multi-service multiplexing unit implements data frame parsing, address table management, and VLAN management, and realizes the reception and forwarding of data frames within the VLAN defined by the data service interface 0409 and the user-side interface 0411 of the multi-service multiplexing unit through its main control module.

[0130] After the multi-service multiplexing multi-wavelength optoelectronic conversion transceiver device converts the multicast service or broadcast service into a unicast stream through the protocol conversion unit, it is forwarded to the user CPN network within the VLAN defined by the unicast service interface 0406 and the user side interface 0411 of the multi-service multiplexing unit through the multi-service multiplexing unit main control module.

[0131] Compared with the existing general-purpose optoelectronic conversion transceiver, the multi-service multiplexing multi-wavelength optoelectronic conversion transceiver proposed in the above example not only realizes the optoelectronic conversion function of the optical signal entering the home, but also converts the cable TV IP broadcast or DVB broadcast stream into a unicast stream, thereby realizing the home access of the broadcast service superimposed on the star-structured access network based on Ethernet technology. The unicast stream after protocol conversion is connected to the home router together with the communication service and broadband Internet, and is fully compatible with the access of various terminals in the home, thereby fundamentally solving the problem of insufficient compatibility of the broadcast protocol in the home CPN network. At the same time, each user exclusively enjoys, including but not limited to, 1G / 10G data service interface physical bandwidth and 10G / 25G broadcast service bandwidth, and can obtain higher home bandwidth at a low home access cost. Through the protocol conversion function and multi-service multiplexing function of the multi-service multiplexing multi-wavelength optoelectronic conversion transceiver, the broadcast or multicast stream is converted into a unicast stream and connected to the home router together with the communication service and broadband service. The user's home no longer has two LANs of cable TV network and broadband network. While fully meeting the multi-service access, it guarantees the access of high-definition and ultra-high-definition 4K / 8K programs on the cable TV network.

[0132] The core network side of the above-mentioned multi-service multiplexing multi-wavelength optoelectronic conversion transceiver provides a multi-wavelength multi-channel optical fiber interface for realizing optical fiber access for communication services, broadband services, and cable TV services. While having the optoelectronic conversion function for communication services, broadband services, and cable TV service signals, it converts the cable TV service broadcast / multicast into a unicast protocol compatible with the home router and multiple terminals, and then accesses the same to the home router together with the communication services and broadband Internet services. The user's home no longer has two local area networks, namely the cable TV network and the broadband network. Under the premise of support from the cable TV network front-end platform, the user-side smart TV does not need to be equipped with a set-top box, and can be directly connected to the wireless access terminal or LAN interface of the home router, thus solving the problem of inconvenient operation caused by two remote controls for the TV and the set-top box. Since the user's home does not need to be equipped with an operator's home gateway and a cable TV set-top box, the network operator's access network home access cost and maintenance cost are greatly reduced.

[0133] The various embodiments in this specification are described in a progressive manner. Similar portions between the various embodiments can be referenced to each other. Each embodiment focuses on the differences between the other embodiments. In particular, the hardware + program embodiments are generally similar to the method embodiments, so their description is relatively simple. For relevant portions, refer to the description of the method embodiments.

[0134] The foregoing description of this specification describes specific embodiments. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that described in the embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order shown or the sequential order to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0135] Although this application provides method operation steps as described in the embodiments or flowcharts, more or fewer operation steps may be included based on routine or non-creative work. The order of steps listed in the embodiments is only one way of executing the steps among many, and does not represent the only execution order. When an actual device or client product executes the method steps shown in the embodiments or the figures, the steps may be executed sequentially or in parallel (for example, in a parallel processor or multi-threaded processing environment).

[0136] The terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, product, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, product, or apparatus. Without further limitation, it does not preclude the presence of additional identical or equivalent elements in a process, method, product, or apparatus that includes the elements.

[0137] For the convenience of description, the above devices are described in terms of functions divided into various modules. Of course, when implementing the embodiments of this specification, the functions of each module can be implemented in the same or multiple software and / or hardware, or the modules that implement the same function can be implemented by a combination of multiple sub-modules or sub-units, etc. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0138] Those skilled in the art will also appreciate that, in addition to implementing the controller in pure computer-readable program code, it is entirely possible to implement the same functionality by logically programming the method steps in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, embedded microcontrollers, and the like. Therefore, such a controller can be considered a hardware component, and the devices included therein for implementing various functions can also be considered structures within the hardware component. Alternatively, the devices for implementing various functions can be considered both software modules implementing the method and structures within the hardware component.

[0139] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0140] Memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.

[0141] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices, or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory media such as modulated data signals and carrier waves.

[0142] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between the various embodiments can be referenced across them. Each embodiment focuses on the differences from other embodiments. In particular, since the system embodiments are generally similar to the method embodiments, their description is relatively simple. For relevant parts, reference can be made to the description of the method embodiments. Throughout this specification, reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the embodiments in this specification. In this specification, the schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and integrate the different embodiments or examples, and features of different embodiments or examples, described in this specification, without conflict.

[0143] The above description is merely an example of the embodiments of this specification and is not intended to limit the embodiments of this specification. For those skilled in the art, various modifications and variations of the embodiments of this specification are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of this specification shall be included within the scope of the claims of the embodiments of this specification.

Claims

1. A multi-service multiplexing multi-wavelength optoelectronic conversion transceiver, characterized in that: include: Multi-wavelength multi-channel fiber adapter module, unidirectional service photoelectric conversion module, unidirectional service protocol conversion unit, bidirectional service photoelectric conversion transceiver module, multi-service multiplexing unit, network adapter module and user interface, including: The multi-wavelength, multi-channel optical fiber adapter module has single-fiber three-wavelength access adaptation and dual-fiber three-wavelength access adaptation functions. When the home optical fiber is a single-core optical fiber carrying 1550nm broadcast service and bidirectional service 1490nm / 1310nm three-wavelength optical signals, the multi-wavelength / multi-channel adapter module is configured to consist of a single-fiber adapter and a wavelength splitter. The wavelength splitter splits the unidirectional service optical wavelength to the unidirectional service optical-to-electrical conversion module, and splits the bidirectional service optical signal to the bidirectional service optical-to-electrical conversion transceiver module to achieve optical-to-electrical conversion and reception and forwarding of uplink and downlink data. A unidirectional service optical-electrical conversion module, connected to the multi-wavelength multi-channel optical fiber adapter module, for realizing optical-to-electrical conversion and reception of unidirectional optical signals of the broadcast stream; A unidirectional service protocol conversion unit, connected to the unidirectional service photoelectric conversion module, for implementing reception, caching, protocol conversion and forwarding of broadcast services; A bidirectional business optoelectronic conversion transceiver module is connected to the multi-wavelength multi-channel optical fiber adapter module and is used for the electro-optical conversion and transmission of the uplink signal and the optoelectronic conversion, reception, buffering and amplification of the downlink optical signal; A multi-service multiplexing unit, connected to the unidirectional service protocol conversion unit and the bidirectional service optoelectronic conversion transceiver module, for receiving, multiplexing and forwarding unidirectional service data frames and bidirectional service data frames; The network adaptation module and the user interface are connected to the multi-service multiplexing unit and are used to implement user CPN network access.

2. The multi-service multiplexing multi-wavelength optoelectronic conversion transceiver according to claim 1, characterized in that: In the single-fiber three-wavelength-to-home scenario, the multi-wavelength, multi-channel optical fiber adapter module consists of an optical fiber adapter seat and a wave splitter. The three-wavelength optical signal formed by combining the 1550nm wavelength optical signal carrying the broadcast service signal and the 1490nm / 1310nm wavelength optical signal carrying the data service signal is connected to the optical fiber adapter seat through the home optical fiber and the LC adapter head, and then connected to the wave splitter for wave splitting. Among them, the 1550nm wavelength signal is connected to the unidirectional service optoelectronic conversion module through the first optical interface, and the 1490nm / 1310nm wavelength optical signal is connected to the bidirectional service optoelectronic conversion transceiver module through the second optical interface.

3. The multi-service multiplexing multi-wavelength optoelectronic conversion transceiver according to claim 1, characterized in that: In the dual-fiber three-wavelength-to-home scenario, the multi-wavelength multi-channel optical fiber adapter module consists of a unidirectional service optical fiber adapter seat and a bidirectional service adapter seat. The 1550nm wavelength optical signal carrying the broadcast service signal and the 1490nm / 1310nm wavelength optical signal carrying the data service signal are respectively connected to the optical fiber adapter seat through the first optical fiber and the second optical fiber and the LC adapter head. Among them, the 1550nm wavelength signal is connected to the unidirectional service optoelectronic conversion module through the first optical interface, and the 1490nm / 1310nm wavelength optical signal is connected to the bidirectional service optoelectronic conversion transceiver module through the second optical interface.

4. The multi-service multiplexing multi-wavelength optoelectronic conversion transceiver according to claim 1, wherein: The unidirectional service optoelectronic conversion module includes: a photoelectric device PD, a transimpedance amplifier TIA and a limiting amplifier. After the input optical signal is converted into an electrical signal by the photoelectric device PD, it is connected to the transimpedance amplifier TIA for amplification and forming a differential signal, and then connected to the limiting amplifier for amplification and shaping, and is connected to the unidirectional service protocol conversion unit through its output interface.

5. The multi-service multiplexing multi-wavelength optoelectronic conversion transceiver according to claim 1, characterized in that: The bidirectional service optoelectronic conversion transceiver module includes: an access optical fiber, a transceiver optoelectronic conversion component, a laser drive circuit, a receiving amplifier circuit, and a monitoring circuit. The differential electrical signal of the data bit stream to be forwarded is connected to the drive circuit through the drive circuit input interface to realize the drive of the electro-optical conversion device LD. After the forwarded data bit stream is modulated to a 1310nm optical carrier by the laser LD, it is connected to the access optical fiber through a combiner / demultiplexer to realize the electro-optical conversion and forwarding of the data stream. Correspondingly, in the receiving direction, the 1490nm wavelength optical carrier carrying the received data stream is connected to the optoelectronic device PD after passing through the combiner / demultiplexer. The optoelectronic device PD converts the received optical signal into an electrical signal, which is then connected to the input end of the transimpedance amplifier TIA. After amplification and shaping by the limiting amplifier, the differential signal of the bit stream is obtained through the output interface, realizing the optoelectronic conversion and reception of the received optical signal.

6. The multi-service multiplexing multi-wavelength optoelectronic conversion transceiver according to claim 1, characterized in that: The unidirectional service protocol conversion unit includes: an input interface, a management interface, a power interface, a baseband broadcast and QAM broadcast identification module, a QAM demodulation module, an IP broadcast / multicast stream input end network interface module, a filtering and forwarding module, a main cache management module, a protocol conversion, encapsulation and forwarding module, a unicast data stream output network interface module, a user request network interface module, a user request and authority management and port mapping management module, a main storage module, a clock management module, a configuration management module, a power management module, a main control unit, a unicast stream output interface and a user request interface.

7. The multi-service multiplexing multi-wavelength optoelectronic conversion transceiver according to claim 6, characterized in that: The baseband broadcast and QAM broadcast identification module is connected to the output interface of the one-way service photoelectric conversion module, and is used to receive the baseband broadcast or QAM broadcast stream signal output by the one-way service photoelectric conversion module, and automatically identify the format of the input signal, and connect it to the baseband IP broadcast receiving module or the QAM demodulation module according to the corresponding format, so as to realize the automatic identification and protocol conversion of the one-way service protocol conversion module for broadcast services of different formats.

8. The multi-service multiplexing multi-wavelength optoelectronic conversion transceiver according to claim 6, characterized in that: The IP broadcast / multicast stream input end network interface module includes: a PMA sublayer, a PCS sublayer, an MII interface layer, a MAC control layer and an input buffer, wherein: The PMA sublayer is used to reshape and recover the serial data stream and extract the synchronous clock. After recovering the serial data stream according to the extracted synchronous clock, it performs serial-to-parallel conversion on the serial data stream to obtain a parallel data stream and output it to the PCS sublayer. The PCS sublayer is used to descramble and decode 64B / 66B codewords on parallel data streams according to the physical coding sublayer in the protocol, and remove the block synchronization header. After obtaining the complete Ethernet data frame, it is transmitted to the MAC control layer through the MII interface. The MAC control layer is used to parse the Ethernet frame structure and write valid data packets into the input buffer after checking the frame integrity and filtering out invalid frames.

9. The multi-service multiplexing multi-wavelength optoelectronic conversion transceiver according to claim 1, characterized in that: The multi-service multiplexing unit includes: a unicast service interface, a data service interface, a unicast service network interface module, a data service network interface module, a main control module, a user-side network interface module and a user-side interface, wherein: The unicast service network interface module, the data service network interface module, and the user-side network interface module are composed of the physical layer. The unicast service network interface module is connected to the one-way service protocol conversion and forwarding module to enable communication between the user terminal and the one-way service protocol conversion and forwarding module and reception of the destination unicast stream; the data service network interface module is connected to the two-way service optoelectronic conversion and transceiver module to enable communication between the user and the management platform and the transmission and reception of communication services and broadband Internet services; the user-side network interface module is connected to the user network adaptation module to enable the transmission and reception of user-requested signaling services and the forwarding of communication services, broadband Internet services, and broadcast services. The main control module includes: a logical plane control unit, a data plane control unit, and a forwarding matrix, which are used to implement VLAN management, MAC control layer management, and data forwarding. When a user requests a unicast service, the main control module forwards the request signaling to the unidirectional service protocol conversion unit, completing the forwarding of user authority management information between the unidirectional service protocol conversion unit and the platform, and receiving and forwarding the user's unicast stream. When a user requests a bidirectional service, the main control module forwards the user request signaling to the bidirectional service optoelectronic conversion transceiver module, implementing the reception and forwarding of user communication services and broadband Internet services, thereby realizing multi-service multiplexing, cross-connection, and fast forwarding functions. The unicast service network interface module is connected to the unidirectional service protocol conversion unit through the unicast service interface, and the data service network interface module is connected to the bidirectional service optoelectronic conversion transceiver module through the data service interface; The user-side network interface module is connected to the network adaptation module through the user-side interface and accesses the user CPN network through the user interface module.

10. The multi-service multiplexing multi-wavelength optoelectronic conversion transceiver according to claim 1, characterized in that: The network adaptation module includes: an impedance matching component and a signal isolation component, which are used to achieve impedance matching and signal isolation between the multi-service multiplexing unit and the user interface.

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