Multi-service multiplexed multi-wavelength optical router

Abstract

The application provides a multi-service multiplexing multi-wavelength optical fiber router, comprising: a multi-wavelength multi-channel adaptation module having single-fiber three-wave access adaptation function and double-fiber three-wave access adaptation function; a unidirectional optical-electric conversion module composed of a unidirectional ROSA and a receiving circuit, used for realizing receiving and optical-to-electric conversion of unidirectional optical signals of broadcast streams; a unidirectional service protocol conversion unit, used for realizing optical-electric conversion receiving, buffering, protocol conversion and forwarding of broadcast services; a bidirectional optical-electric conversion transceiver module, used for realizing driving of a transmitting laser and buffering and amplification of a received signal; a WAN interface module, a routing unit, a WiFi module and a LAN interface module. The above scheme solves the problems of two local area networks in a user's home, inconvenient operation and high household access cost caused by the fact that the cable television service cannot be accessed to the home router when the communication service, the broadband Internet service and the cable television service are simultaneously accessed to the home.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of multiplex communication, and particularly relates to a multi-service multiplexing multi-wavelength optical fiber router. BACKGROUND

[0002] At present, under the background of three-network integration of communication network, broadband Internet and broadcast television network and vigorous promotion of optical fiber to the home, in order to provide users with communication services, broadband Internet services and broadcast television services, the broadcast television network basically adopts (Digital Video Broadcasting, DVB) + PON (Passive Optical Network), IP broadcast + PON or completely adopts IPTV (Internet Protocol TV) mode to realize optical fiber to the home. Among them, in the scheme of realizing optical fiber to the home by the IPTV mode of the broadcast television network, the broadcast television network gives up the characteristics of transmitting broadcast television services through independent channels, which inevitably cannot meet the demand of high-quality transmission of broadcast television services. In the DVB+PON and IP broadcast+PON technical schemes, the broadcast television network retains an independent broadcast channel, which can ensure the safe broadcast property of broadcast television services while meeting the broadcast-level transmission quality of high-definition and ultra-high-definition 4K / 8K services. However, there are still some problems in the DVB+PON and IP broadcast+PON technical schemes, especially in the DVB+PON scheme. The TS stream is transmitted on the original cable television point by using QAM (Quadrature Amplitude Modulation) modulation technology, the transmission rate of one frequency point is 38M, and the transmission rate of all effective frequency points is less than 3 GE. If a set of 36M code rate 4K program is to be transmitted, only one set of 4K program can be transmitted by one frequency point. If a set of 120M code rate 8K program is to be transmitted, at least three frequency points need to be bound to transmit a set of 8K program. As can be seen, although optical fiber to the home is realized, due to the limitation of QAM frequency points, it is impossible to meet the demand of transmitting more ultra-high-definition 4K / 8K services.

[0003] Further, in the DVB+PON scheme, in addition to the above-mentioned frequency point problem, there are also compatibility problems and high cost of home access. For example, Figure 1 Fig. 1 shows a schematic diagram of the access network of the DVB+PON scheme, Figure 1 mainly composed of a DVB broadcast optical signal amplifier 0101, a PON network local terminal device 0110, a single-fiber home user 0114, a double-fiber home user 0115 and an ODN (Optical Distribution Network) part between the local terminal and the user. In the DVB+PON scheme, Figure 1In this process, DVB broadcasts are modulated onto a 1550nm optical wavelength for transmission, and are delivered to the home along with the 1490nm downlink and 1310nm uplink wavelengths of the PON network. Therefore, there are two modes for home delivery: single-fiber three-wave and dual-fiber three-wave.

[0004] Depend on Figure 1 As can be seen, in the single-fiber three-wavelength drop mode, the 1550nm wavelength optical signal carrying DVB broadcast and the 1490 / 1310nm wavelength optical signal carrying data services from the PON network are combined in the multiplexer 0105 and then connected to the single-fiber drop user 0114 via the drop fiber 0108 carrying the three wavelengths of 1550nm / 1490nm / 1310nm. After being split by the demultiplexer, the broadcast signal carrying the 1550nm wavelength is connected to the DVB set-top box and then to the television set to receive and watch broadcast television programs. Meanwhile, the 1490 / 1310nm wavelength optical signal carrying data services is connected to the PON network drop gateway and then connected to mobile phones, computers, and other application terminals via the home router to access data services.

[0005] In the dual-fiber, triple-wavelength drop mode, neither the 1550nm wavelength broadcast signal nor the 1490 / 1310nm wavelength optical signal from the PON network carrying data services is combined. The 1550nm wavelength broadcast signal enters the home via fiber optic cable 0109, while the 1490 / 1310nm wavelength optical signal from the PON network carrying data services enters the home via fiber optic cable 0113. After entering the home, the indoor network for dual-fiber, triple-wavelength users is the same as for single-fiber, triple-wavelength users. The 1550nm wavelength broadcast signal is connected to the DVB set-top box 0117 and then to a television set for receiving broadcast television programs. The 1490 / 1310nm wavelength optical signal carrying data services is connected to the PON network gateway ONU (Optical Network Unit) and then to a home router for accessing mobile phones, computers, and other application terminals for data services.

[0006] exist Figure 1 In this system, there is a bidirectional network cable 0118 between the DVB set-top box 0117 and the gateway ONU 0119, enabling the television to receive and watch on-demand services in addition to broadcasting.

[0007] The aforementioned network fully realizes the goals of fiber optic and two-way communication for cable television networks, and can provide users with triple-play services. However, in addition to the frequency limitation issue mentioned earlier, it also has the following three problems:

[0008] 1) DVB broadcast into the home can only be watched on TV through DVB set-top box, can not be accessed through the router to other application terminals, there are two completely incompatible networks in the home, the essence is PON network and broadcast network independent home solution, the compatibility of multiple terminals in the home is insufficient;

[0009] 2) DVB+PON scheme access network, because the two-way service channel uses PON network technology, so there must be an ONU in the PON network, and multiple ONUs share a PON port access bandwidth through a 1:N optical splitter 0103, and the home bandwidth is insufficient.

[0010] 3) Two networks are independently accessed, and the operator provides an ONU and a DVB set-top box in the user's home, which is high in home access cost.

[0011] Further, as shown in Figure 2 is an IP broadcast+PON technology access network principle diagram. Figure 2 Compared with Figure 1 , the broadcast service is no longer a DVB standard QAM signal of QAM modulation mode transmission of TS stream, but a UDP data frame encapsulated by UDP protocol according to TCP / IP protocol standard of TS stream, and an IP broadcast stream transmitted at a rate of 10G / 25G, and at the access end, the IP broadcast stream is received by an IP broadcast+PON gateway formed by an IP broadcast stream receiving chip (ASIC) and an ONU gateway switching module instead of a DVB set-top box. In Figure 2 , whether it is a single fiber three wave home user 0114 or a double fiber three wave home user 0115, the user's home is equipped with a composite gateway 0207 and 0208 of ONU module+IP broadcast receiving module, which receives IP broadcast stream and data service through the composite gateway 0207 and 0208 of ONU module+IP broadcast receiving module, and accesses a television set through an IP set-top box 0209 to watch TV programs, and can also watch TV programs and data service through mobile phones, computers and other user terminals.

[0012] Further, Figure 2 , 10G / 25G rate transmission IP broadcast stream is used, which is 4 to 8 times the transmission rate of DVB broadcast, so as to solve the problem of limited transmission rate in DVB broadcast technology, and the terminal reception is through the IP broadcast or multicast to unicast receiving mechanism, which can solve the problem of insufficient compatibility of DVB technology in the two networks and multiple terminals in the home. However, Figure 2The system shown is a transmission scheme of superimposed broadcast channel on PON network. Since the bidirectional service channel adopts PON network technology, there is a problem of high home access cost caused by the necessity of equipping ONU in PON network. Multiple ONUs share one PON port access bandwidth through 1:N splitter, and there is a problem of insufficient home access bandwidth.

[0013] If the tree structure PON network is replaced by a comb structure network based on Ethernet technology in the above IP broadcast + PON technical scheme, the problems of low home access bandwidth and high home access cost in PON network can be solved, and the problem of repeated investment caused by the upgrading of PON network due to low home access bandwidth can also be solved.

[0014] As shown in Figure 3 , it is a comparison diagram of tree structure PON network and comb structure (star structure) network based on Ethernet technology. In Figure 3 , a is a schematic diagram of tree structure PON network. PON network mainly consists of OLT 0110, shared optical fiber 0111, 1:N splitter 0112, home optical fiber 0113 and ONU 0119. As can be seen from the principle block diagram of tree structure PON network, N users under 1:N splitter share the access bandwidth of one PON port. Taking GPON network as an example, when the downlink bandwidth of each PON port of OLT is 2.5G and N=32, the average bandwidth of each user is 2500M / 32=78M. If the concurrency rate is 30%, the concurrent bandwidth can reach 250M. In addition, PON technology adopts downlink data broadcast transmission, and uplink data is transmitted in time division multiplexing mode. Therefore, the user end must be equipped with home gateway ONU of operator assets to access the user end CPN network, so the home access cost is high.

[0015] In Figure 3 , b is a star structure network based on Ethernet technology, which consists of OLT 0301 and second independent optical fiber 0302 of each user. Since each user enjoys a user interface of OLT, when the user interface rate is 1000M, each user can enjoy 1000M rate bandwidth access. Since each user enjoys a user interface of OLT, the user does not need to equip home gateway of operator assets at home. The user only needs to equip optical-electric converter 0303 to access user electric port Wi-Fi router, or directly equip optical fiber Wi-Fi router 0304 to realize access of multiple terminals of users. Figure 3 , b shows the access network, which has the advantages of high access bandwidth and low home access cost.

[0016] However, in Figure 3The access network shown in b also has some problems: the issue of access networks that overlay IP broadcasts to form converged broadcast services has not been resolved. For example... Figure 4 The diagram shows a star-shaped access network based on Ethernet technology carrying communication and broadband internet services, a cable television network carrying IP broadcast services, and schematic diagrams of single-fiber-to-the-home and dual-fiber-to-the-home models. Figure 4 Both a and b share the following characteristics: both have single-fiber-to-the-home (SFW) users 0114 and dual-fiber-to-the-home (DIP) users 0115. SFW user 0114 uses a single-core fiber 0401 to carry 1550nm wavelength optical signals for broadcast services and 1490 / 1310nm wavelength optical signals for uplink / downlink data services, which are then combined by multiplexer 0105 to produce a single-fiber three-wavelength optical signal. DIP user 0115 uses a 0202 fiber carrying 1550nm wavelength optical signals for broadcast services and a second independent fiber 0302 carrying 1490 / 1310nm wavelength optical signals for uplink / downlink data services, both delivered through a separate channel.

[0017] Figure 4 The difference between A and B is that A is equipped with a single-fiber three-wave photoelectric conversion transceiver 0402 and a dual-fiber three-wave photoelectric conversion transceiver 0403, which can only realize one-way and two-way service photoelectric conversion functions. In other words, the single-fiber three-wave photoelectric conversion transceiver 0402 and the dual-fiber three-wave photoelectric conversion transceiver 0403 do not have a broadcast service protocol conversion function unit. As a result, IP broadcast services cannot be accessed through the home router 0120, but can only be accessed through the IP set-top box 0404 equipped with IP broadcast filtering function to the TV. Communication services and broadband Internet services are accessed through the home router 0120 for access by data service terminals such as mobile phones and computers. This results in two incompatible local area networks in the home. This inevitably leads to mobile phones, computers and other terminals being unable to watch cable TV services, and the TV being connected to the IP set-top box 0404 being unable to watch Internet content. Moreover, the remote controls of the TV and the IP set-top box 0404 are incompatible, requiring two remote controls to operate to watch cable TV programs, which is extremely inconvenient. If the TV is connected to the home router 0120, it can only watch internet TV and cannot watch cable TV services.

[0018] and Figure 4 In section b, the homes of single-fiber-to-the-home (0114) and dual-fiber-to-the-home (0115) are respectively equipped with single-fiber three-wavelength optical transceivers (0405 and 0406) that feature broadcast service photoelectric conversion + protocol conversion and forwarding units and multi-service multiplexing units. After protocol conversion, broadcast services, communication services, and broadband internet services are all connected to the home router (0120), enabling converged access for multiple terminals in the user's home. This solves the problem... Figure 4The two incompatible local area networks in the a family in the a exist the problem of inconvenient operation. When the communication service, the broadband Internet service and the cable television service enter the house at the same time, the cable television service cannot be accessed to the home router, resulting in the problems of two local area networks in the user's home, inconvenient operation and high cost of entering the house, and no effective solution has been proposed. SUMMARY

[0019] The application aims to provide a multi-service multiplexing multi-wavelength optical fiber router, specifically, a multi-service multiplexing multi-wavelength optical fiber router applied to a multi-service multiplexing exclusive optical fiber access network user terminal based on Ethernet technology, which can achieve the technical effects of improving compatibility and reducing home entry cost.

[0020] The application provides a multi-service multiplexing multi-wavelength optical fiber router, which is implemented as follows:

[0021] A multi-service multiplexing multi-wavelength optical fiber router, comprising: an optical-electric conversion protocol conversion function unit and a routing function unit, the optical-electric conversion protocol conversion function unit comprising: a multi-wavelength multi-channel adaptation module, a unidirectional service optical-electric conversion module, a unidirectional service protocol conversion unit, and a bidirectional service optical-electric conversion transceiver module; the routing function unit comprising: a WAN interface module, a routing unit, a WiFi module, and a LAN interface module, wherein:

[0022] The multi-wavelength multi-channel adaptation module has single-fiber three-wave access adaptation function and double-fiber three-wave access adaptation function;

[0023] The unidirectional service optical-electric conversion module is composed of a unidirectional ROSA and a receiving circuit, and is used for realizing reception and optical-to-electric conversion of unidirectional broadcast stream optical signals;

[0024] The unidirectional service protocol conversion unit is used for realizing optical-electric conversion reception, caching, protocol conversion and forwarding of broadcast services;

[0025] The bidirectional service optical-electric conversion transceiver module is used for realizing driving of a transmitting laser and buffering and amplifying of a received signal;

[0026] The WAN interface module comprises: a first optical fiber WAN interface used for accessing communication services and broadband services, and a second optical fiber WAN interface used for accessing cable television services;

[0027] The routing unit is used for realizing reception, routing and forwarding of unidirectional service data frames and bidirectional service data frames;

[0028] The WiFi module is used for accessing communication services, broadband services and cable television services to user terminals through a WiFi interface;

[0029] LAN interface module, for accessing communication services, broadband services and cable television services to user terminals through LAN interface.

[0030] In one embodiment, in a single fiber three wave home scenario, the multi-wavelength multi-channel adaptation module comprises: a fiber adapter and a wave splitter, for forming a three-wavelength optical signal by combining the 1550nm wavelength optical signal carrying broadcast service signals and the 1490nm / 1310nm wavelength optical signal carrying data service signals, accessing the optical fiber adapter through the home optical fiber and the LC adapter head, and accessing the wave splitter for wave division, wherein the 1550nm wavelength signal accesses the unidirectional service optical-electric conversion module, and the 1490nm / 1310nm wavelength optical signal accesses the bidirectional service optical-electric conversion transceiver module.

[0031] In one embodiment, in a double fiber three wave home scenario, the multi-wavelength multi-channel adaptation module comprises: a unidirectional service optical fiber adapter and a bidirectional service adapter, wherein the unidirectional service optical fiber adapter is used to access the 1550nm wavelength optical signal carrying broadcast service signals through the first LC adapter head, and the bidirectional service adapter is used to access the 1490nm / 1310nm wavelength optical signal carrying data service signals through the second LC adapter head, wherein the 1550nm wavelength signal accesses the unidirectional service optical-electric conversion module, and the 1490nm / 1310nm wavelength optical signal accesses the bidirectional service optical-electric conversion transceiver module.

[0032] In one embodiment, the bidirectional service optical-electric conversion transceiver module is used to access the data bit stream differential electrical signal to be forwarded to the laser driver circuit to realize the driving of the electro-optical conversion device LD, and after the data bit stream differential electrical signal to be forwarded is modulated to the 1310nm optical carrier by the electro-optical conversion device LD, it is accessed to the access optical fiber through the combining and dividing wave filter, realizing the electro-optical conversion and the forwarding of the data stream.

[0033] In one embodiment, in the receiving direction, the bidirectional service optical-electric conversion transceiver module carries the 1490nm wavelength optical carrier carrying the received data stream, and accesses the photosensitive device PD after passing through the combining and dividing wave filter. The photosensitive device PD converts the received optical signal into an electrical signal and accesses the input end of the transimpedance amplifier TIA, and then amplifies and shapes through the limiting amplifier, and then obtains the differential signal of the bit stream through the receiving, to realize the photoelectric conversion and receiving of the received optical signal.

[0034] In one embodiment, the unidirectional service protocol conversion and forwarding unit comprises: an IP broadcast multicast stream network interface module, a filtering and forwarding module, a main cache management module, a protocol conversion and encapsulation forwarding module, and a unicast data frame output network interface module, wherein:

[0035] The IP broadcast multicast stream interface module comprises a PMA sublayer, a PCS sublayer, an MII interface, a MAC control layer and an input buffer, is used for shaping a differential electrical signal of an accessed IP broadcast or multicast stream, extracting a synchronous clock, serial-parallel conversion, descrambling and 64B / 66B decoding, and after removing block synchronization and recovering a complete data frame, writing the data frame to the input buffer through the MAC control layer for reading by a filtering and forwarding module;

[0036] The filtering and forwarding module is used for reading a destination program stream data frame from the input buffer according to a user request filtering condition, and after stripping off a header and a tail of the read destination program stream data frame, storing a payload of the destination program stream data frame into a main buffer;

[0037] The main buffer management module is used for buffering an Ethernet frame payload written by the filtering and forwarding module in a partitioned time buffer according to a ring buffer mechanism, for reading by a protocol conversion and encapsulation forwarding module;

[0038] The protocol conversion and encapsulation forwarding module is used for reading a UDP multicast IP packet of a destination program stream from the main buffer according to a user request, encapsulating the UDP multicast IP packet into a unicast IP packet according to a port binding mechanism, and writing the unicast IP packet into an output buffer for reading and forwarding by an output interface layer;

[0039] The unicast data frame output network interface module comprises a MAC control layer, wherein the MAC control layer is used for adding an Ethernet header and tail to a unicast IP packet read from the output buffer, encapsulating the unicast IP packet into a unicast data frame, and forwarding the unicast data frame to a routing unit.

[0040] In one embodiment, the unidirectional service protocol conversion and forwarding unit further comprises a user request network interface module, a user request permission management and port mapping management module, and a master control module, wherein:

[0041] The user request network interface module is used for performing serial-parallel conversion and descrambling decoding on a user request data frame after receiving the user request data frame, and writing the user request data frame into an input buffer through a MAC control layer of the user request network interface module for reading and processing;

[0042] The user request permission management and port mapping management module is used for confirming user permissions, analyzing a binding condition between a user request and a multicast stream port, and after forming a filtering and unicast stream encapsulation mapping relationship of a user request destination multicast stream, providing the mapping relationship to the master control module for unified control of the filtering and forwarding module and the protocol conversion and forwarding module by the master control module;

[0043] The master module is configured to implement unit configuration management, user permission management, port mapping management, filtering and encapsulation management, and data forwarding, so as to ensure that the unidirectional service protocol conversion forwarding unit is bound to the port of the live broadcast service system and the user permission, and complete the protocol conversion, encapsulation and forwarding of the target multicast stream.

[0044] In one embodiment, the routing unit comprises a broadcast network interface module, a data service network interface, a master module, a switching matrix, a wireless access function module, and a user network interface module, wherein:

[0045] The broadcast network interface module is connected with the unidirectional service protocol conversion unit, and is configured to realize communication between the user terminal and the unidirectional service protocol conversion unit and reception of the target unicast stream.

[0046] The data service network interface is connected with the bidirectional service photoelectric conversion transceiver module, and is configured to realize communication between the user terminal and the management platform, and transceiving of the communication service and the broadband Internet service.

[0047] The wireless access function module and the user network interface module are configured to provide wireless access function and LAN access interface for the user, realize access of the user terminal device, and provide reception and routing forwarding of the signaling service, the communication service, the broadband service and the unicast stream of the cable television service.

[0048] The master module and the switching matrix are configured to realize VLAN management, MAC control layer management and data forwarding function, forward the request signaling to the protocol conversion module when the user requests the unicast service, complete forwarding of the user permission management information between the protocol conversion module and the platform, and reception and forwarding of the user unicast stream; when the user requests the bidirectional service, forward the user request signaling to the bidirectional service interface module, so as to realize reception and forwarding of the user side communication service and the broadband Internet service, and realize multi-service multiplexing, cross connection and forwarding function.

[0049] In one embodiment, the wireless access function module comprises a radio frequency front end module, a baseband processing module and an antenna, which are configured to realize transmission and reception of WiFi signals, and provide bridging between the wireless device and the wired network, wherein:

[0050] The radio frequency front end comprises a power amplifier, a low noise amplifier and a filter, wherein the power amplifier is configured to enhance the transmission power of the wireless signal, the low noise amplifier is configured to amplify the weak received signal to reduce noise interference, and the filter is configured to filter out the out-of-band interference signal.

[0051] The baseband processing module is configured to convert the digital signal into a wireless signal, or demodulate the received wireless signal into a digital signal.

[0052] The antenna is an antenna structure using MIMO technology, and spatial multiplexing is realized through multiple antennas.

[0053] In one embodiment, the core network side of the multi-service multiplexing multi-wavelength fiber router provides a multi-wavelength multi-channel fiber interface for realizing fiber access of communication services, broadband services, and cable television services, and simultaneously has the function of optoelectronic conversion of communication services, broadband services, and cable television service signals, and after converting the cable television service into a unicast protocol compatible with home multi-terminal, the cable television service is accessed to the home CPN network together with the communication service and broadband Internet service.

[0054] The multi-service multiplexing multi-wavelength fiber router provided in the present application is different from the existing home router, and can not only realize fiber access and routing forwarding of data services, broadband Internet, and communication service signals, but also can access the user CPN network after converting the broadcast television multicast stream or broadcast stream into a unicast stream, realize the fusion access of the IP broadcast network based on the data service network of the Ethernet technology, and thus solve the technical problems of two local area networks in the user's home, inconvenient operation, and high home access cost caused by the fact that the cable television service cannot be accessed to the home router when the communication service, broadband Internet service, and cable television service are simultaneously accessed to the home in the DVB+PON network, and achieve the technical effects of improving compatibility and reducing home access cost. Through the above-mentioned manner, the two local area networks of the cable television network and the broadband network no longer exist in the user's home, the high-definition, ultra-high-definition 4K / 8K program broadcast-level high-rate access of the cable television network is ensured while the multi-service access is met. Meanwhile, under the premise of support of the cable television network front-end platform, the user's intelligent television directly accesses the wireless access end or LAN interface of the multi-service multiplexing multi-wavelength fiber router provided in the present application without the need of being equipped with a set-top box, and the problem of inconvenient operation caused by two remote controllers of the television and the set-top box is solved. Since the user's home does not need to be equipped with the operator home gateway and the cable television set-top box, the network operator access network home access cost and maintenance cost are greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0056] Figure 1 is a schematic diagram of the principle of PON technology access network+DVB broadcast network;

[0057] Figure 2is a schematic diagram of PON technology access network + IP broadcast network principle;

[0058] Figure 3 is a schematic diagram of tree structure access network and Ethernet technology star structure access network comparison;

[0059] Figure 4 is a schematic diagram of realizing Ethernet technology star structure access network + IP broadcast network model;

[0060] Figure 5 is a schematic diagram of multi-service multiplexing multi-wavelength optical fiber router according to the embodiment of the application;

[0061] Figure 6 is a schematic diagram of multi-service multiplexing single-fiber three-wave optical fiber router according to the embodiment of the application;

[0062] Figure 7 is a schematic diagram of multi-service multiplexing double-fiber three-wave optical fiber router according to the embodiment of the application;

[0063] Figure 8 is a schematic diagram of optical fiber router one-way service optical-electric conversion module according to the embodiment of the application;

[0064] Figure 9 is a schematic diagram of optical fiber router bidirectional service optical-electric conversion transceiver module according to the embodiment of the application;

[0065] Figure 10 is a schematic diagram of optical fiber router one-way service protocol conversion forwarding unit according to the embodiment of the application;

[0066] Figure 11 is a schematic diagram of single bidirectional service optical fiber router routing and Wi-Fi unit according to the embodiment of the application;

[0067] Figure 12 is a schematic diagram of Ethernet technology star structure access network + IP broadcast access network user end multi-wavelength optical fiber router application according to the embodiment of the application;

[0068] The above figure reference signs:

[0069] 0101, DVB broadcast optical signal amplifier; 0103, 1 :N optical splitter; 0105, combiner; 0107, 1 :N optical splitter; 0108, three-wavelength drop optical fiber; 0109, drop optical fiber; 0110, PON network terminal device; 0111, shared optical fiber; 0112, 1 :N optical splitter; 0113, drop optical fiber; 0114, single-fiber drop user; 0115, double-fiber drop user; 0116, splitter; 0117, DVB set-top box; 0118, bidirectional access network cable; 0119, drop gateway ONU; 0120, home router; 0201, access network terminal IP broadcast stream transmitter; 0202, first independent optical fiber; 0206, third independent optical fiber; 0207, composite gateway; 0208, composite gateway; 0209, IP set-top box; 0301, Ethernet terminal device; 0302, second independent optical fiber; 0303, optical-electrical converter; 0304, optical fiber WiFi router; 0401, single-core drop optical fiber; 0402, single-fiber three-wave optical-electrical conversion transceiver; 0403, double-fiber three-wave optical-electrical conversion transceiver; 0404, IP set-top box; 0405, single-fiber three-wave optical transceiver; 0406, double-fiber three-wave optical transceiver; 0501, drop optical fiber; 0502, optical-electrical conversion protocol conversion functional unit; 0503, multi-wavelength / multi-channel optical fiber adaptation module; 0504, access optical fiber; 0505, optical interface; 0506, one-way service optical-electrical conversion module; 0507, input interface; 0508, one-way service protocol conversion forwarding unit; 0509, bidirectional service optical-electrical conversion transceiver module; 0501, interface; 0510T, unicast stream output interface; 0510R, user request interface; 0511, interface; 0511T, input interface; 0511R, output interface; 0512, routing functional unit; 0513, unicast service interface; 0514, data service interface; 0515, WAN interface module; 0516, routing unit; 0517, WiFi module; 0518, LAN interface module; 5019, user-side wireless interface; 0520, network adaptation module; 0601, multi-wavelength / multi-channel optical fiber adaptation module; 0602, LC adaptation head; 0603, optical fiber adaptation seat; 0604, interface; 0605, combiner / splitter; 0701, multi-wavelength / multi-channel optical fiber adaptation module; 0801, optical receiving assembly (ROSA); 0802, limiting amplifier; 0803, optical signal detection interface; 0901, transceiving optical-electrical conversion circuit; 0902, intermediate processing circuit; 0904, optical signal detection interface; 1001, management interface; 1002, power supply interface; 1003, input end network interface module; 1004, filtering forwarding module; 1005, main cache management module; 1006, protocol conversion encapsulation forwarding module; 1007, unicast output network interface module; 1008, user request network interface module;1009, user request, authority management and port mapping management module; 1010, master module; 1011, main storage module; 1012, clock management module; 1013, configuration management module; 1014, power module; 1101 broadcast network interface module; 1102, data network interface module; 1103, master module; 1104, clock module; 1105, storage module; 1106, security module; 1107, wireless module; 1108, user network interface module; 1109, power module; 1110, switching matrix; 1111, management module; 1112, user side wireless interface; 1113, 4*1G (SERDES) interface; 1201, multi-service multiplexing multi-wavelength fiber router in single-fiber three-wave scenario; 1202, multi-service multiplexing multi-wavelength fiber router in double-fiber three-wave scenario. DETAILED DESCRIPTION

[0070] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should fall within the protection scope of the present application.

[0071] In this case, a multi-service multiplexing multi-wavelength fiber router is provided, which provides a channel adaptation module for access to independent channel access of broadband Internet service, communication service and cable television service on the service side, and provides a home Wi-Fi access function and a plurality of gigabit LAN interfaces on the user side. Without the need to equip with optical-electric conversion transceiver devices, the seamless connection of fiber network and user CPN network based on Ethernet technology star access network + IP broadcast can be realized. Data service uplink and downlink signals can be converted from optical to electrical and from electrical to optical. The protocol conversion of multicast or broadcast protocol IP broadcast stream transmitted in the cable television network can be realized. Communication service, broadband Internet service and cable television service can be realized through the Wi-Fi access function and a plurality of gigabit LAN interfaces of the multi-service multiplexing multi-wavelength fiber access wireless router. A variety of terminals such as televisions, computers and mobile phones can be accessed, thereby solving the problem that the cable television unidirectional IP broadcast stream cannot be accessed to the home router and the compatibility is insufficient in the home network. There are no two independent and incompatible local area networks in the user's home, so as to realize the triple play of communication service, broadband Internet service and cable television service. In the user's home, the communication network and the cable television network are integrated into a network. The user can obtain Internet service, communication service and cable television broadcast service on a variety of terminals and televisions, realize the IP, bidirectional and fiber of the cable television network, and provide high-definition, ultra-high-definition 4K / 8K, AR / VR video service and communication service, broadband Internet service multi-service service for users based on the large bandwidth access capability of Ethernet technology access network and the 10G / 25G access bandwidth of broadcast network.

[0072] In this case, a multi-service multiplexing multi-wavelength fiber router is provided, which can include: a multi-wavelength / multi-channel optical fiber adaptation module, a unidirectional service optical-electric conversion module, a unidirectional service protocol conversion and forwarding unit, a bidirectional service optical-electric conversion transceiver module, a routing unit, a WiFi module, a WAN interface and a LAN interface module, a network adaptation module and a user interface, wherein:

[0073] 1) The multi-wavelength / multi-channel optical fiber adaptation module is used to provide single-fiber three-wave or double-fiber three-wave access interfaces according to single-fiber home or double-fiber home scenarios to meet the adaptation requirements of different scene access networks.

[0074] 2) The unidirectional service optical-electric conversion module can provide a 10G / 25G single-wavelength unidirectional service optical fiber access interface and is composed of an optical-electric conversion device and a signal amplification circuit to convert and receive the 10G / 25G single-wavelength unidirectional service optical signal.

[0075] 3) Bidirectional service photoelectric conversion transceiver module, composed of access optical fiber, transceiver photoelectric conversion circuit, laser drive circuit, and receiving amplifier circuit, and monitoring and monitoring circuit. The differential electrical signal of the data bit stream to be forwarded is connected to the laser drive circuit through the sending interface, the driving of the electro-optical conversion device LD is realized, the data stream to be forwarded is modulated to the 1310nm optical carrier through the laser LD, and then connected to the access optical fiber through the combining and dividing wave filter, realizing the electro-optical conversion and data stream forwarding. In the receiving direction, the optical carrier of 1490nm wavelength carrying the received data stream is connected to the photosensitive device PD through the combining and dividing wave filter, and the photosensitive diode PD converts the received optical signal into an electrical signal and connects it 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 receiving, realizing the photoelectric conversion and receiving of the received optical signal.

[0076] 4) Unidirectional service protocol conversion forwarding unit, which can include: IP broadcast / multicast stream network interface module, filtering and forwarding module, main cache management module, protocol conversion and encapsulation 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 module, wherein:

[0077] 4-1) IP broadcast / multicast stream interface module, which can be composed of PMA (Physical Medium Attachment) sublayer, PCS (Physical Coding) sublayer, MII interface (Media Independent Interface), MAC (Media Access Control Address) control layer and input buffer, to realize the shaping of the accessed IP broadcast or multicast stream differential electrical signal, extracting the synchronous clock, serial-parallel conversion, descrambling and 64B / 66B decoding, removing block synchronization, and restoring the complete data frame through the MAC control layer to the input buffer for the filtering and forwarding module to read.

[0078] 4-2) Filtering and forwarding module, used to read the destination program stream data frame from the input buffer according to the user request filtering condition given by the main control, and only store the payload into the main cache after stripping off the header and tail of the data frame.

[0079] 4-3) Main cache management module, which is a ring buffer that partitions and slices the recent (for example, the last 5 seconds of data) data according to the predetermined time window. Specifically, the main cache management module partitions and times the Ethernet frame payload written by the filtering and forwarding module according to the ring buffer mechanism, so as to be read by the protocol encapsulation module. Its cache format can be a normal UDP socket: IP header + UDP header + TS payload (without Ethernet header and FCS).

[0080] 4-4) Protocol conversion encapsulation forwarding module, for reading the UDP multicast IP packet of the destination program stream from the main cache according to the user request, encapsulating into unicast IP packet according to the port binding mechanism provided by the master, and writing into the output cache, so as to read and forward by the output interface layer.

[0081] 4-5) Unicast data frame output network interface module, which can include: MAC control layer, MII interface layer, physical layer, MAC control layer reads the unicast IP packet encapsulated and written into the output cache by the protocol conversion encapsulation forwarding module according to the user demand, adds the Ethernet header and tail and encapsulates into unicast data frame, and forwards to the routing unit.

[0082] 4-6) User request network interface module, which can include: physical layer, MII interface, MAC control layer and input cache; for receiving user request data frame, performing serial-parallel conversion and descrambling decoding, and writing into the input cache through the MAC control layer, so as to be read and processed by the corresponding functional module.

[0083] 4-7) User request authority management and port mapping management module, for confirming user authority, user request and multicast stream port binding condition analysis, and forming the filtering and unicast stream encapsulation mapping relationship of user request destination multicast stream, and providing to the master module, so as to be controlled by the master module to manage the filtering and forwarding module and the protocol conversion forwarding module.

[0084] 4-8) Master module, which can include: master CPU, forwarding matrix, control unit; the master module is the core control module of the unidirectional service protocol conversion forwarding unit, for realizing unit configuration management, user authority management, port mapping management, filtering and encapsulation management and data forwarding, to ensure that the unidirectional service protocol conversion forwarding unit converts, encapsulates and forwards the destination multicast stream according to the port binding of the live broadcast service system and the user authority.

[0085] 5) Routing unit, which can include: broadcast network interface module, data service network interface, master module, switching matrix, storage module, clock synchronization module, management module, security module, power module, wireless access functional module, user network interface module. Among them:

[0086] 5-1) Broadcast network interface module and data service network interface, which can be composed of physical layer, wherein the broadcast network interface module is connected with the unidirectional service protocol conversion and forwarding module, to realize the communication between the user terminal and the unidirectional service protocol conversion and forwarding module and the reception of the unicast stream; the data service network interface is connected with the bidirectional service photoelectric conversion transceiver module, to realize the communication between the user and the management platform and the transmission and reception of the communication service and the broadband Internet service; the wireless access function module and the user network interface module provide the wireless access function and the LAN access interface for the user, to realize the access of the user terminal device and provide the reception and routing forwarding of the signaling service, the communication service, the broadband Internet service and the broadcast service (unicast stream).

[0087] 5-2) Master module and switching matrix, which can include: logical plane control unit, data plane control unit and forwarding matrix, to realize the VLAN management, MAC control layer management and data forwarding function. When the user requests the unicast service, the request signaling is forwarded to the protocol conversion module, to complete the forwarding of the user authority management information between the protocol conversion module and the platform, the reception and forwarding of the user unicast stream; when the user requests the bidirectional service, the user request signaling is forwarded to the bidirectional service interface module, to realize the reception and forwarding of the user communication service and the broadband Internet service, so as to realize the multi-service multiplexing, cross connection and forwarding function.

[0088] 5-3) Wireless access function module, which can include: radio frequency front end module, baseband processing module and antenna part, to realize the transmission and reception of the WiFi signal and provide the bridging between the wireless device (mobile phone, computer, etc.) and the wired network. The radio frequency front end can include: power amplifier (PA), low noise amplifier (LNA) and filter, wherein the power amplifier (PA) is used to enhance the transmission power of the wireless signal, the low noise amplifier (LNA) is used to amplify the weak received signal to reduce noise interference, and the filter is used to filter out the out-of-band interference signal (such as other WiFi or Bluetooth signals). The above-mentioned baseband processing module is used to convert the digital signal into wireless signal (modulation: such as OFDM), or demodulate the received wireless signal into digital signal. The wireless access function module supports MIMO (Multiple Input Multiple Output) technology, which improves the transmission rate and stability through multiple antennas. Based on this, the above-mentioned antenna part can use MIMO technology to realize spatial multiplexing through multiple antennas to improve the throughput.

[0089] The aforementioned multi-service multiplexing multi-wavelength fiber optic router differs from current home wireless routers in that it provides fiber optic WAN interfaces that can access two access networks. One interface connects to a network that can access communication services and broadband internet services, while the other interface connects to a cable TV baseband IP broadcast network. Through its built-in protocol conversion unit, it converts multicast streams of TS over UDP type broadcasts without enabling the IGMP protocol into unicast streams, which are then connected to the user's home television, computer, and mobile phone via wireless access and LAN access interfaces. This solves the technical problem of cable TV networks being unable to access the home network through a router, resulting in two local area networks in the user's home. With the multi-service multiplexing multi-wavelength fiber optic access wireless router provided in this example, users can seamlessly receive live broadcast services from the cable TV network's baseband IP broadcast on their televisions, computers, and mobile phones, experiencing the same quality as accessing IPTV services. Moreover, the transmission quality of broadcast television services is far superior to that of IPTV mode transmission, and the transmission quality of high-definition and ultra-high-definition 4K / 8K programs can reach broadcast-grade transmission standards.

[0090] The multi-service multiplexing multi-wavelength fiber optic access wireless router provided in this application offers multi-wavelength, multi-channel fiber optic interfaces on the core network side, enabling fiber optic access for communication services, broadband internet services, and IP broadcast cable television services. Furthermore, while possessing photoelectric conversion capabilities for the optical signals of communication services, broadband internet services, and cable television IP broadcast services, it also converts IP broadcast services into a unicast protocol compatible with multiple home terminals, allowing them to access the home CPN network along with communication services and broadband internet services. This solves the technical problem of insufficient compatibility of cable television network IP broadcast services in home networks. Through a single CPN network of the home wireless router, it provides users' local area networks with multi-services such as communication services, broadband internet services, and cable television services with unified protocols. This resolves the technical problem of cable television services being unable to access the home router when communication services, broadband internet services, and cable television services are simultaneously accessed, resulting in two local area networks in the user's home, inconvenient operation, and high installation costs.

[0091] Multi-service multiplexing multi-wavelength fiber optic routers, such as Figure 5 As shown, the multi-service multiplexing multi-wavelength fiber optic router may include: a drop fiber optic cable 0501, an optoelectronic conversion protocol conversion function unit 0502, and a routing function unit 0512, wherein:

[0092] The optoelectronic conversion protocol conversion function unit 0502 may include: a multi-wavelength / multi-channel fiber optic adapter module 0503, a unidirectional service optoelectronic conversion module 0506, a unidirectional service protocol conversion and forwarding unit 0508, and a bidirectional service optoelectronic conversion transceiver module 0509, wherein:

[0093] The routing function unit 0512 can include a WAN interface module 0515, a routing unit 0516, a WiFi module 0517, a LAN interface module 0518, a user-side wireless interface 5019, a network adaptation module 0520, and a LAN interface.

[0094] The multi-wavelength / multi-channel fiber adaptation module 0503 has single-fiber three-wave access adaptation and double-fiber three-wave access adaptation functions. When the home access 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 adaptation module can be composed of a single-fiber adapter and a wave splitter. Through the wave splitter, the unidirectional service optical wavelength is split to the unidirectional service optical-electric conversion module 0506, and the bidirectional service optical signal is split to the bidirectional service optical-electric conversion transceiver module 0509, to realize optical-electric conversion and uplink / downlink data reception and forwarding. When the home access optical fiber is a two-core optical fiber, one core carries 1550nm broadcast service and is accessed to the unidirectional service optical-electric conversion module 0506, and the other core carries bidirectional service 1490nm / 1310nm and is accessed to the bidirectional service optical-electric conversion transceiver module 0509.

[0095] To adapt to the single-fiber three-wave home access scenario, the multi-wavelength / multi-channel fiber adaptation module 0503 in FIG. 5 can be replaced by 0601 in FIG. 6. Figure 6 Figure 5 The multi-wavelength / multi-channel fiber adaptation module 0503 in FIG. 5 can be replaced by 0601 in FIG. 6. 0601 can be composed of a fiber adaptation seat 0603 and a combining / splitting wave filter 0605. The 1550nm wavelength optical signal carrying broadcast service signals and the 1490 / 1310nm wavelength optical signal carrying data service signals are combined to form a three-wavelength optical signal, which is accessed to the fiber adaptation seat 0603 through the single-core home access optical fiber 0401 and the LC adapter head 0602, and is split by the combining / splitting wave filter 0605. The 1550nm wavelength signal is accessed to the unidirectional service optical-electric conversion module 0506 through the optical interface 0505, and the 1490 / 1310nm wavelength optical signal is accessed to the bidirectional service optical-electric conversion transceiver module 0509.

[0096] To adapt to the double-fiber three-wave home access scenario, the multi-wavelength / multi-channel fiber adaptation module 0503 in FIG. 5 can be replaced by 0701 in FIG. 7. Figure 7 Figure 5 ​​The multi-wavelength / multi-channel fiber adapter module 0503 in the multi-wavelength / multi-channel fiber adapter module 0503, wherein 0701 can include: a fiber adapter seat 0603 (one-way service fiber adapter seat and two-way service adapter seat), a 1550nm wavelength optical signal carrying broadcast service signals and a 1490 / 1310nm wavelength optical signal carrying data service signals, respectively through the first independent optical fiber 0202 and the second independent optical fiber 0302 and the LC adapter head 0602 access to the fiber adapter seat 0603, wherein the 1550nm wavelength signal 05022 accesses the one-way service optical-electric conversion module 0506, and the 1490 / 1310nm wavelength optical signal accesses the two-way service optical-electric conversion transceiver module 0509.

[0097] Figure 6 And Figure 7 For Figure 5 Actual embodiments, Figure 6 adapt to single fiber three wave home scene, Figure 7 adapt to double fiber three wave home scene, by Figure 5 , Figure 6 And Figure 7 It can be seen that the optical carrier carrying one-way service is accessed to the one-way service optical-electric conversion module 0506 through the optical interface 0505, and is accessed to the one-way service protocol conversion and forwarding unit 0508 through the input interface 0507 after optical-electric conversion. The protocol conversion unit encapsulates the destination broadcast stream into a unicast stream according to the user's request to watch and listen to the program, and forwards it to the routing function unit 0512 through the interface 0510. The routing function unit forwards the program stream requested by the destination user through routing and through its LAN interface to the user access terminal, realizing the listening and watching of broadcast television programs.

[0098] The 1490nm wavelength optical carrier signal carrying communication service and broadband internet service is accessed to the two-way service optical-electric conversion transceiver module 0509 through the access optical fiber 0504. The electrical signal after optical-electric conversion is accessed to the routing function unit 0512 through the interface 0511. The routing function unit forwards the data service stream requested by the destination user through its LAN interface to the user access terminal, realizing the service of communication and broadband internet service.

[0099] As Figure 8As shown, the unidirectional service photoelectric conversion module 0506 can include: an optical interface 0505, an optical receiving assembly (ROSA) 0801 composed of a photoelectric device PD (Photo-Diode), a trans-impedance amplifier (TIA), a limiting amplifier 0802, and a signal detection circuit. After the input optical signal is converted into an electrical signal by the photoelectric device PD, is amplified by the trans-impedance amplifier TIA and forms a differential signal, is further amplified and shaped by the limiting amplifier, and is output to the protocol conversion unit through the input interface 0507. At the same time, the unidirectional service photoelectric conversion module 0506 also provides an optical signal detection interface 0803 to provide a detection signal for real-time detection of the input optical signal for the control system.

[0100] As shown in the figure, Figure 9 The bidirectional service photoelectric conversion transceiver module 0509 can include: an access optical fiber 0504, a transceiving photoelectric conversion circuit 0901, an intermediate processing circuit 0902, and an optical signal detection interface 0904. The intermediate processing circuit 0902 includes: a burst laser amplifier driver, optical power monitoring / control, main amplification decision / limiting amplifier, and signal detection. For the differential electrical signal of the data bit stream to be forwarded, the input interface 0511T is accessed to the driving circuit to realize the driving of the electro-optical conversion device LD, so that the data stream to be forwarded is modulated to the 1310nm optical carrier by the electro-optical conversion device LD, and then accessed to the access optical fiber 0504 through the combining and splitting wave filter to realize the electro-optical conversion and data stream forwarding. In the receiving direction, the optical carrier of the 1490nm wavelength carrying the received data stream is accessed to the photosensitive device PD through the combining and splitting wave filter, the photosensitive diode PD converts the received optical signal into an electrical signal and accesses the input end of the trans-impedance amplifier TIA, and then the limiting amplifier is amplified and shaped. The differential signal of the bit stream is obtained through the output interface 0511R to realize the photoelectric conversion and reception of the received optical signal.

[0101] As shown in the figure, Figure 10 The unidirectional service protocol conversion forwarding unit 0508 can include: an input interface 0507, a management interface 1001, a power supply interface 1002, a power supply module 1014, an input end network interface module 1003, a filtering and forwarding module 1004, a main cache management module 1005, a protocol conversion and encapsulation forwarding module 1006, a unicast output network interface module 1007, a user request network interface module 1008, a user request, a permission management and port mapping management module 1009, a master control module 1010, a main storage module 1011, a clock management module 1012, a configuration management module 1013, a unicast stream output interface 0510T, and a user request interface 0510R. Wherein:

[0102] The input network interface module 1003 provides a 10G / 25G optional rate SerDes input interface 0507, which is connected to the output interface of the unidirectional service optical-electric conversion module 0506 and receives the serial signals of all multicast streams or broadcast streams output by the unidirectional service optical-electric conversion module 0506. The input network interface module 1003 is composed of a physical layer PMA (physical medium attachment sublayer), a PCS (physical coding sublayer), an MII interface layer, a MAC control layer and an input buffer (Rx Buffer). Among them:

[0103] The PMA sublayer recovers the input clock signal and the serial data stream, and after obtaining the recovered serial clock signal and the serial data stream, performs serial-parallel conversion on the serial data stream, and outputs the recovered clock signal and the parallel data stream to the PCS sublayer;

[0104] The PCS sublayer performs data block synchronization, descrambling, 64B / 66B code word decoding and removes the block synchronization header on the parallel data stream according to the provisions of the physical coding sublayer in IEEE802.3ae, and after obtaining the complete Ethernet data frame, transmits it to the MAC control layer through the MII interface;

[0105] The MAC control layer analyzes the Ethernet frame structure (such as source / destination MAC address, frame type), checks the frame integrity (CRC check), and after filtering invalid frames, writes valid data packets into the receive buffer (Rx Buffer). The buffer uses a first-in-first-out mechanism for data stream caching, and for the buffer, whether it is read or not, it is processed in the way that the advanced data is overwritten by the later data.

[0106] The filtering and forwarding module 1004 is used to filter the destination multicast stream according to the user's request from all multicast streams written into the receive buffer (Rx Buffer) at the above MAC layer, and then send it to the main cache management module 1005 for writing into the main cache.

[0107] The protocol conversion and encapsulation forwarding module 1006 is used to encapsulate the destination multicast stream into a unicast stream according to the user's request from the multicast stream written into the main cache by the above main cache management module, and then forward it to the destination user through the unicast output network interface.

[0108] The IP broadcast stream received by the multi-service multiplexing multi-wavelength optical fiber router is a multicast stream of all programs transmitted by the front-end platform to users and not starting the IGMP protocol, and is input to the input end of the multi-service multiplexing multi-wavelength optical fiber router in a flooding mechanism. After completing the photoelectric conversion, according to the user request, the destination program is converted into a unicast stream and then forwarded to the destination user. Further, the system adopts a non-dynamic port binding mechanism, that is, in the EPG (electronic program guide), the mapping relationship of the multicast address and the port address of the platform broadcast program and the source IP address and the port address after protocol conversion is explicitly defined, and this mapping is static. Under the premise that the program does not increase or decrease, the port binding is fixed. Only when the program increases or decreases, the front-end is uniformly adjusted and the data in the EPG is updated.

[0109] Suppose the port binding instance of the platform broadcasting 200 programs is:

[0110] CCTV-1:239.1.1.1:5000~XXTV-X:2391.1.200:5000,

[0111] Among them, 239.1.1.1:5000~2391.1.200:5000 is the multicast address and the destination port number of 200 programs, and 6000~6199 is statically bound in the system as the source port number of the unicast stream. Assuming that the IP address of the protocol converter is 192.168.10.100 and the IP address of the user equipment is 192.168.1.101, the specific implementation process is as follows:

[0112] S1: User initiates a request:

[0113] The user clicks “CCTV-1” through the EPG, and the browser accesses the fixed URL http: / / 192.168.10.100:6000. After the user request interface module 1008 receives the user request through the user request interface 0510R, it is forwarded to the user request, permission management and port mapping management module 1009.

[0114] S2: HTTP redirection:

[0115] After the user request permission management and port mapping management module verifies the permission, it returns the unicast stream address (which is still 192.168.10.100:6000 in fact).

[0116] S3: Player connection:

[0117] The user equipment (for example: VLC) initiates a UDP connection request to the 6000 port of the buffer.

[0118] S4: Filtering and caching of data frames:

[0119] User request, permission management and port mapping management module 1009, the user request program port mapping relationship through the main control module 1010 is forwarded to the filter forwarding module 1004 and protocol conversion encapsulation forwarding module 1006, filter forwarding module 1004 gets 192.168.10.100:6000 corresponding 239.1.1.1:5000 filter condition, from the input buffer filter out 239.1.1.1:5000 data frame, unload its header and tail IP packet forwarding to the main cache management module 1005 for caching.

[0120] The main cache management module 1005 according to the predetermined time window partition slice cache recent (for example: recent 5 seconds of data) data ring buffer (Ring Buffer), its function is to temporarily store multicast stream data, to deal with the real-time nature of user request and network jitter. The cache rule of main cache management module 1005 is: cache recent data packet (for example: recent 5 seconds of data) according to time window, timeout data is automatically discarded, to guarantee real-time performance; pre allocate fixed size cache block, reduce the dynamic memory allocation overhead; for each multicast stream allocation independent ring buffer (for example: 239.1.1.1:5000 → cache area 1), thus avoiding data mixed, further, using efficient data structure (for example: circular queue) to store data packet, cache format is according to the normal UDP socket: IP header + UDP header + TS load (no Ethernet header and FCS).

[0121] S5: multicast to unicast:

[0122] Protocol conversion encapsulation forwarding module 1006 after receiving the unicast encapsulation parameters given by the main control, read 239.1.1.1:5000 IP packet from the main cache management module 1005, unload its IP header and UDP header, encapsulation into unicast IP packet: source port: static binding port (for example: 6000), source IP: protocol converter IP (192.168.10.100). Target IP: user equipment IP (192.168.1.101), target port: user equipment random port (for example: 50000). After encapsulation, forward to the output buffer (Rx Buffer) of unicast output network interface module 1007.

[0123] S6: encapsulation and forwarding of unicast data frame:

[0124] The MAC layer of the unicast data stream output network interface module 1007 reads the output buffer message, loads the frame header and frame tail, and encodes through the physical layer PCS sublayer 64B / 668, and then serializes through the PMA sublayer, and then accesses the routing function unit 0512 through the unicast stream output interface 0510T, and is forwarded to the LAN interface module 0518 through the routing module 0516 of the routing function unit 0512, and is forwarded to the user destination device through the LAN interface.

[0125] S7: Flow replication and sending:

[0126] If multiple users simultaneously request the same port (for example: 6000), an independent unicast stream is copied for each user, and the data is sent in parallel through multi-threading or the multi-queue of the unicast data stream output network interface module 1007.

[0127] S8: Multi-terminal request:

[0128] The filtering and forwarding module 1004 and the protocol conversion and encapsulation forwarding module 1006 are both provided with multiple sets of filters and multi-core multi-threaded encapsulation functions, thereby meeting the broadcast service demand of multiple terminals of the access user.

[0129] S9: Session maintenance and termination:

[0130] The user player regularly sends a heartbeat packet (for example: RTCP message), and the user request, permission management and port mapping management module 1009 updates the session active time. If the user stops playing and there is no heartbeat, the data sending of the terminal is stopped.

[0131] As shown in Figure 11 The routing function unit 0512 can include: a unicast service interface 0513, a data service interface 0514, a broadcast network interface module 1101, a data network interface module 1102, a master module 1103, a clock module 1104, a storage module 1105, a security module 1106, a wireless module 1107, a user network interface module 1108, a power module 1109, a switching matrix 1110, a management module 1111, a user side wireless interface 1112, and a 4*1G (SERDES) interface 1113. Among them:

[0132] The broadcast network interface module 1101 and the data network interface module 1102 are connected with the unidirectional service optical-electric conversion module 0506 and the bidirectional service optical-electric conversion transceiver module 0509 through the unicast service interface 0513 and the data service interface 0514 respectively, and simultaneously access the user CPN network through the user side wireless interface 1112 and the 4*1G (SERDES) interface 1113.

[0133] The broadcast network interface module 1101 and the data network interface module 1102 can be composed of a physical layer PMA sublayer, a PCS sublayer, an MII interface, a MAC control layer, and input / output buffers. The PMA sublayer receives the serial data stream from the PMD sublayer, extracts the clock signal, recovers the data stream, and performs serial-to-parallel conversion before feeding the resulting parallel symbol stream to the PCS sublayer. The PCS sublayer performs descrambling, 64b / 66b decoding, and removes block synchronization headers to obtain a complete data frame. This complete data frame is then transmitted to the MAC control layer via the MII interface. The MAC control layer writes the received data frame to the input buffer for reading and forwarding.

[0134] The main control module 1103, as the core of the router, is used to complete packet processing, routing protocol calculation, system management and security encryption. When implemented, it can run an embedded operating system (such as Linux or RTOS) and support functions such as NAT (Network Address Translation), DHCP (Dynamic Host Configuration Protocol), and firewall to realize packet routing and forwarding and manage the collaborative work of other hardware modules.

[0135] The storage module 1105 can consist of RAM (DDR3 / DDR4 SDRAM) and ROM (SPI NOR Flash or eMMC storage). The RAM is used to temporarily store the routing table, connection status table, and data packet buffer, while the ROM is used to store the firmware program, system configuration, and log files.

[0136] The wireless module 1107 can consist of a wireless chipset, RF front-end, power amplifier (PA), low noise amplifier (LNA), filter, and antenna. It is used to implement the 802.11 a / b / g / n / ac / ax protocol, modulate and demodulate wireless signals, manage MIMO multi-antenna technology, provide SSID broadcasting, and manage client access.

[0137] User network interface module 1108 is used to provide physical layer and data link layer functions for user local area network (LAN) interfaces.

[0138] The switching matrix 1110 is used to coordinate the main control unit and the MAC control layer to transmit data at high speed between multiple interfaces inside the router, and supports parallel data exchange.

[0139] In one embodiment, such as Figure 12 The image shows a schematic diagram of a practical application scenario for a multi-service multiplexing multi-wavelength fiber optic router. Figure 12The multi-service multiplexing multi-wavelength optical fiber router 1201 in the single-fiber three-wave scenario is composed of an access network local end IP broadcast stream transmitter 0201, an Ethernet technology star structure network local end device 0301, a local end to user ODN, and a user end multi-service multiplexing multi-wavelength optical-electric conversion transceiver. The multi-service multiplexing multi-wavelength optical fiber router 1202 in the double-fiber three-wave scenario is composed of a third independent optical fiber 0206 and a second independent optical fiber 0302 for carrying broadcast service 1550 nm wavelength optical signals and data service uplink / downlink 1490 nm / 1310 nm wavelength optical signals, respectively.

[0140] The multi-service multiplexing multi-wavelength optical fiber router proposed in the above example realizes user signaling and service routing and forwarding for communication services and broadband Internet services, and also converts multicast services or broadcast services into unicast streams through a protocol conversion unit, and then accesses various application terminals of users through LAN interfaces or Wi-Fi interfaces together with communication services, broadband services, and data services. The multi-service multiplexing multi-wavelength optical fiber router is different from existing general home routers. The multi-service multiplexing multi-wavelength optical fiber router proposed in the embodiment not only meets the functions of existing general home routers, but also realizes the function of converting broadcast or multicast to unicast for wired television IP broadcast streams or multicast streams, thereby realizing the access of broadcast services based on an Ethernet technology star structure access network. The unicast stream after protocol conversion is accessed to the home router together with communication services and broadband Internet, can be compatible with the access of various terminals in the home, and solves the problem of insufficient compatibility of broadcast protocols in the home CPN network. At the same time, each user enjoys physical bandwidth including but not limited to 1G / 10G data service interface and 10G / 25G broadcast service bandwidth, and can obtain higher access bandwidth at low access cost. Through the protocol conversion function of the multi-service multiplexing multi-wavelength optical fiber router, the broadcast or multicast stream is converted into a unicast stream, which is accessed to the same local area network in the home together with communication services and broadband services. In this way, there are no two local area networks of wired television networks and broadband networks in the user's home, which meets the multi-service access while ensuring the high code rate access of wired television network high-definition, ultra-high-definition 4K / 8K program broadcast level standards.

[0141] The greater beneficial points are: first, under the premise of supporting the cable television network front-end platform, the smart television directly accesses the wireless access end or LAN interface of the multi-service multiplexing multi-wavelength optical fiber router proposed in the disclosure without the need of being equipped with a set-top box, thereby solving the problem of inconvenient operation caused by two remote controllers of the television and the set-top box; second, the user's home does not need to be equipped with an operator home gateway and a cable television set-top box, thereby greatly reducing the home entry cost and maintenance cost of the network operator.

[0142] Each of the embodiments in the specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment mainly describes the difference from other embodiments. In particular, for the hardware+program type embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the related parts can be referred to the part of the method embodiment.

[0143] The above describes specific embodiments of the specification. 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 than the order in which they are recited in the embodiments and still achieve desirable results. In addition, the processes depicted in the figures do not necessarily require the particular order shown, or sequential order, to achieve the desired results. In some implementations, multitasking and parallel processing can be advantageous.

[0144] Although the present application provides method operation steps as described in the embodiments or flowcharts, more or fewer operation steps can be included based on routine or non-creative labor. The order of steps listed in the embodiments is only one of the many execution orders of the steps, and does not represent the only execution order. When the device or client product is executed in practice, the method order shown in the embodiments or the drawings can be executed in sequence or in parallel (for example, in a parallel processor or multi-thread processing environment).

[0145] The term "comprising" or "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, product or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, product or equipment. Without more limitations, it does not exclude the presence of other same or equivalent elements in the process, method, product or equipment including the elements.

[0146] For ease of description, the above apparatus is described in various modules with different functions respectively. Of course, in the implementation of the embodiments of the present specification, the functions of each module can be implemented in the same or more software and / or hardware, or the modules implementing the same function can be implemented by a combination of multiple sub-modules or sub-units, etc. The apparatus embodiment described above is only schematic. For example, the division of the units is only a logical function division, and there can be another division manner in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed units can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0147] Those skilled in the art also know that, in addition to implementing the controller in the form of pure computer readable program code, the controller can also be implemented in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers and embedded microcontrollers, etc. by logically programming the method steps to achieve the same functions. Therefore, such a controller can be considered as a hardware component, and the devices included therein for implementing various functions can also be considered as structures within the hardware component. Alternatively, the devices for implementing various functions can even be considered as both software modules implementing the method and structures within the hardware component.

[0148] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0149] The memory can include non-persistent memory in computer readable media, random access memory (RAM), and / or non-volatile memory, such as read-only memory (ROM) or flash memory (flash RAM). The memory is an example of computer readable media.

[0150] Computer-readable media includes permanent and non-permanent, movable and non-movable 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 technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible by a computing device. According to the definition herein, computer-readable media does not include transitory media such as modulated data signals and carriers.

[0151] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments. In particular, for system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and the relevant parts can be referred to the part of the description of the method embodiments. In the description of the specification, the description of 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 the embodiment or example are included in at least one embodiment or example of the embodiments of the specification. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0152] The above is only an embodiment of the embodiments of the specification and does not limit the embodiments of the specification. The embodiments of the specification can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the embodiments of the specification shall be included in the scope of claims of the embodiments of the specification.

Claims

1. A multi-service multiplexed multi-wavelength optical fiber router, characterized by, It comprises: The photoelectric conversion protocol conversion function unit comprises: a multi-wavelength multi-channel adaptation module, a unidirectional service photoelectric conversion module, a unidirectional service protocol conversion unit, and a bidirectional service photoelectric conversion transceiver module; the routing function unit comprises: a WAN interface module, a routing unit, a WiFi module, and a LAN interface module, wherein: The multi-wavelength multi-channel adaptation module has single-fiber three-wave access adaptation function and double-fiber three-wave access adaptation function. The unidirectional service photoelectric conversion module is connected with the multi-wavelength multi-channel adaptation module, is composed of unidirectional ROSA and receiving circuit, and is used for realizing reception and photoelectric conversion of broadcast stream unidirectional optical signal. The unidirectional service protocol conversion unit is connected with the unidirectional service photoelectric conversion module, and is used for realizing photoelectric conversion reception, buffering, protocol conversion and forwarding of broadcast service. The bidirectional service photoelectric conversion transceiver module is connected with the multi-wavelength multi-channel adaptation module, and is used for realizing driving of a transmitting laser and buffering and amplification of a received signal. The WAN interface module is connected with the unidirectional service photoelectric conversion module and the bidirectional service photoelectric conversion transceiver module, and comprises: a first optical fiber WAN interface used for accessing communication service and broadband service, and a second optical fiber WAN interface used for accessing cable television service. The routing unit is connected with the WAN interface module, and is used for realizing reception, routing and forwarding of unidirectional service data frames and bidirectional service data frames. The WiFi module is connected with the routing unit, and is used for accessing communication service, broadband service and cable television service to a user terminal through a WiFi interface. The LAN interface module is connected with the routing unit, and is used for accessing communication service, broadband service and cable television service to a user terminal through a LAN interface. The core network side of the multi-service multiplexing multi-wavelength fiber router provides a multi-wavelength multi-channel optical fiber interface, is used for realizing fiber access of communication service, broadband service and cable television service, has photoelectric conversion function of communication service, broadband service and cable television service signals, and simultaneously converts cable television service into a unicast protocol compatible with home multi-terminal, and then accesses to a home CPN network together with communication service and broadband Internet service.

2. The multi-service multiplexed multi-wavelength fiber router of claim 1, wherein, In a single-fiber three-wave home access scenario, the multi-wavelength multi-channel adaptation module comprises: a fiber adapter and a wave splitter, is used for forming three-wavelength optical signals by combining 1550nm wavelength optical signals carrying broadcast service signals and 1490nm / 1310nm wavelength optical signals carrying data service signals, accessing to the fiber adapter through a home optical fiber and an LC adapter head, and accessing to the wave splitter for wave division, wherein the 1550nm wavelength signals access to the unidirectional service photoelectric conversion module, and the 1490nm / 1310nm wavelength optical signals access to the bidirectional service photoelectric conversion transceiver module.

3. The multi-service multiplexed multi-wavelength fiber router of claim 1, wherein, In the dual-fiber three-wave home scenario, the multi-wavelength multi-channel adaptation module comprises a unidirectional service fiber adapter and a bidirectional service adapter, wherein the unidirectional service fiber adapter is used for accessing the 1550nm wavelength optical signal carrying broadcast service signals through a first LC adapter, and the bidirectional service adapter is used for accessing the 1490nm / 1310nm wavelength optical signal carrying data service signals through a second LC adapter, wherein the 1550nm wavelength signal is accessed to a unidirectional service photoelectric conversion module, and the 1490nm / 1310nm wavelength optical signal is accessed to a bidirectional service photoelectric conversion transceiver module.

4. The multi-service multiplexed multi-wavelength fiber router of claim 1, wherein, The bidirectional service photoelectric conversion transceiver module is used for accessing the data bit stream differential electrical signal to be forwarded to a laser driver circuit to realize driving of an electro-optical conversion device LD, and after the data bit stream differential electrical signal to be forwarded is modulated to a 1310nm optical carrier through the electro-optical conversion device LD, the signal is accessed to an access optical fiber through a combining and splitting wave filter to realize electro-optical conversion and data stream forwarding.

5. The multi-service multiplexed multi-wavelength fiber router of claim 1, wherein, In the receiving direction, the bidirectional service photoelectric conversion transceiver module carries a 1490nm wavelength optical carrier carrying a received data stream, and after the signal is accessed to a photosensitive device PD through a combining and splitting wave filter, the photosensitive device PD converts the received optical signal into an electrical signal and accesses the input end of a transimpedance amplifier TIA, and after the signal is amplified and shaped by a limiting amplifier, a differential signal of a received bit stream is obtained to realize optical-electric conversion and receiving of the received optical signal.

6. The multi-service multiplexed multi-wavelength fiber router of claim 1, wherein, The unidirectional service protocol conversion and forwarding unit comprises an IP broadcast multicast stream network interface module, a filtering and forwarding module, a main cache management module, a protocol conversion and encapsulation forwarding module, and a unicast data frame output network interface module, wherein: The IP broadcast multicast stream interface module comprises a PMA sublayer, a PCS sublayer, an MII interface, a MAC control layer, and an input cache, is used for shaping the accessed IP broadcast or multicast stream differential electrical signal, extracting a synchronous clock, serial-parallel conversion, descrambling, and 64B / 66B decoding, and after block synchronization is removed and complete data frames are recovered, the signal is written to the input cache through the MAC control layer for reading by the filtering and forwarding module; The filtering and forwarding module is used for reading the destination program stream data frames from the input cache according to user request filtering conditions, and after the header and tail of the read destination program stream data frames are stripped, the payloads are stored into the main cache; The main cache management module is used for storing the Ethernet frame payloads written by the filtering and forwarding module in the main cache according to a ring cache mechanism and by partition and time; The protocol conversion and encapsulation forwarding module is used for reading the UDP multicast IP packets of the destination program stream from the main cache according to user requests, encapsulating the packets into unicast IP packets according to a port binding mechanism, and writing the packets to the output cache for reading and forwarding by the output interface layer; The unicast data frame output network interface module comprises a MAC control layer, wherein the MAC control layer is used for adding Ethernet headers and tails to the read unicast IP packets in the output cache, encapsulating the packets into unicast data frames, and forwarding the data frames to a routing unit.

7. The multi-service multiplexed multi-wavelength fiber router of claim 6, wherein, The unidirectional service protocol conversion forwarding unit further comprises a user request network interface module, a user request authority management and port mapping management module, and a master control module, wherein: The user request network interface module is configured to perform serial-to-parallel conversion and descrambling decoding on the user request data frame after receiving the user request data frame, and write the user request data frame to the input buffer through the MAC control layer of the user request network interface module, so as to be read and processed; The user request authority management and port mapping management module is configured to confirm the user authority, analyze the binding conditions between the user request and the multicast stream port, and provide the master control module with the filtering and unicast stream encapsulation mapping relationship of the user request destination multicast stream, so as to be controlled by the master control module to control the filtering and protocol conversion forwarding modules; The master control module is configured to implement unit configuration management, user authority management, port mapping management, filtering and encapsulation management, and data forwarding, so as to ensure that the unidirectional service protocol conversion forwarding unit completes the protocol conversion, encapsulation and forwarding of the destination multicast stream according to the port binding and user authority of the live broadcast service system.

8. The multi-service multiplexed multi -wavelength fiber router of claim 1, wherein, The routing unit comprises a broadcast network interface module, a data service network interface, a master control module, a switching matrix, a wireless access function module, and a user network interface module, wherein: The broadcast network interface module is connected with the unidirectional service protocol conversion unit, and is configured to realize communication between the user terminal and the unidirectional service protocol conversion unit and reception of the destination unicast stream; The data service network interface is connected with the bidirectional service optical-electric conversion transceiver module, and is configured to realize communication between the user terminal and the management platform, and transceiving of the communication service and the broadband internet service; The wireless access function module and the user network interface module are configured to provide the user with wireless access function and LAN access interface, realize access of the user terminal device, and provide reception and routing forwarding of the signaling service, the communication service, the broadband service and the unicast stream of the cable television service; The master control module and the switching matrix are configured to realize VLAN management, MAC control layer management and data forwarding function, forward the request signaling to the protocol conversion module when the user requests the unicast service, complete forwarding of the user authority management information between the protocol conversion module and the platform, and realize reception and forwarding of the user unicast stream; when the user requests the bidirectional service, forward the user request signaling to the bidirectional service interface module, so as to realize reception and forwarding of the user side communication service and the broadband internet service, and realize multi-service multiplexing, cross connection and forwarding function.

9. The multi-service multiplexed multi-wavelength fiber router of claim 8, wherein, The wireless access function module comprises a radio frequency front end module, a baseband processing module and an antenna, and is configured to realize transmission and reception of WiFi signals, and provide bridging between the wireless device and the wired network, wherein: The radio frequency front end comprises a power amplifier, a low noise amplifier and a filter, wherein the power amplifier is configured to enhance the transmission power of the wireless signal, the low noise amplifier is configured to amplify the weak received signal to reduce noise interference, and the filter is configured to filter out the out-of-band interference signal; The baseband processing module is configured to convert the digital signal into a wireless signal, or demodulate the received wireless signal into a digital signal; The antenna is an antenna structure using MIMO technology, and spatial multiplexing is realized through multiple antennas.

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