A multi-service multiplexing exclusive optical fiber access network system based on Ethernet technology

Abstract

The present application provides a multi-service multiplexing exclusive optical fiber access network system based on Ethernet technology, which relates to the field of multiplexed communication technology. The system includes: a multi-service multiplexer of central office equipment, an ODF terminal board in a central office cabinet, a multi-core optical cable, an ODF terminal board in a corridor cabinet, and a single-core home optical fiber from the corridor cabinet to the user, wherein the multi-service multiplexer provides an independent user interface for each user, and is connected to the multi-core optical cable from the central office to the corridor connected to the central office cabinet through its multi-core pigtail adapter, multi-core pigtail and ODF terminal board in the central office cabinet; the home optical fiber of each user is connected to the multi-core optical cable from the central office to the corridor through the ODF terminal board in the corridor cabinet, thereby realizing a multi-service multiplexing access network system based on Ethernet technology. The above scheme solves the problems of high home access cost, small access bandwidth and high upgrade cost caused by the need to equip the user end with a home gateway ONU when the existing PON network is used for home access in a 1:N optical splitting mode.

Description

Technical Field

[0001] The present application belongs to the field of multiplexed communication technology, and in particular to a multi-service multiplexing exclusive optical fiber access network system based on Ethernet technology. Background Art

[0002] The access network is part of the entire data network and is the last mile part of the data network. Figure 1 As shown in the figure, the access network is located between the core network and the CPN (Customer Premises Network). The access network has evolved from the earliest single-service access network to a broadband access network that can transmit voice communications, data services, broadband Internet services, and video services. In the middle, it has gone through the access network with loop connections, the access network with various modulation and demodulation technologies on copper cable media, and the access network from switches to Category 5 cables entering homes in corridors.

[0003] like Figure 2 As shown, the access network consists of a series of transmission entities (such as line equipment and transmission facilities) between the service node interface (SNI) and the user network interface (UNI). It is an implementation system that provides the required transmission carrying capacity for the provision of telecommunications services and can be configured and managed via the management interface (Q3). There is no restriction on the type and number of UNI and SNI that can be implemented in the access network.

[0004] With the extensive application of optical fiber media, various access technologies for optical fiber to buildings have begun to emerge. At the same time, the fiber-to-the-home access network based on PON (Passive Optical Network, PON) technology has been proposed. Now PON technology has become the mainstream technology for access networks.

[0005] like Figure 3 The figure shows the structure of the PON technology access network. The PON network is mainly composed of three parts: the central office equipment OLT (Optical Line Terminal, optical line terminal, central office equipment), the home gateway (ONU) and the ODN (Optical Distribution Network) connecting the OLT and ONU. The ODN part is a tree-structured ODN composed of shared optical fiber, 1:N optical splitter and home optical fiber, so that the N users connected after the 1:N optical splitter share a core optical fiber before the splitter and a PON port bandwidth resource.

[0006] The transmission method of downstream data in PON network technology is to modulate the downstream data of N users under each PON port to the same downstream wavelength, and then transmit it in a point-to-surface broadcast mode on the tree-structured ODN. The user end receives its own data through the home optical fiber and the home gateway after the optical splitter. In the transmission of upstream data, in order to make the upstream data share the same ODN channel with the downstream data, the upstream data of N users is modulated to the same upstream wavelength in a time-division multiplexing mode and then transmitted to the same PON port corresponding to the downstream data. Since the upstream data transmission of the PON network adopts a time-division multiplexing mechanism, under the condition of fiber access to the home, the user's home must be equipped with a home gateway ONU to access the user-side CPN network to realize the reception of user downstream data and the modulation and upload of upstream data. Therefore, the PON technology access network user function node (UNI) is at the user-side interface end of the home gateway ONU.

[0007] The advantage of PON network is that multiple users share one core from the central office to the corridor under one PON port and access multiple users in a tree structure with power distribution, thus saving the optical fiber resources from the central office to the corridor of the access network. However, the existing PON network also has the following problems:

[0008] 1) Since the ODN part adopts a point-to-multipoint tree network architecture, multiple users share a PON port resource and a core fiber resource before the 1:N splitter, and the upstream data must adopt a time-division multiplexing transmission mechanism, so the OLT cannot provide the access network user-side interface function UNI point, and must be equipped with a home gateway ONU. The OLT and ONU jointly complete the time-division multiplexing and demultiplexing of the upstream data, resulting in the access network user interface function UNI point moving down to the home ONU user-side interface, which can be connected to the user's residential network and fully realize the access network interface definition and function definition. However, the entry of ONU into the user's home not only increases the home access cost in the early stage of network construction, but also requires the subsequent system upgrade to increase the upgrade cost of the user-side ONU equipment. The upgrade of the access network system is always related to the user side.

[0009] 2) Shared fiber PON technology reduces the investment cost of access networks when fiber media is expensive, but network equipment becomes more complicated, and the cost of each generation upgrade will increase significantly. In the iterative upgrade of PON networks, the cost of equipment is getting higher and higher. Every time the average access bandwidth per household doubles, the equipment cost also increases by about twice, or even more than twice.

[0010] 3) After the optical splitter, multiple ONUs share one PON port resource. Under the 1:N splitting condition, 1 / N of the PON port bandwidth resources are obtained. Even if the PON port bandwidth is upgraded from 1 Gigabit to 10 Gigabit, the bandwidth allocated to each user is only increased by tens of megabits. However, the physical interface of the ONU itself and the physical interface of the OLT must be upgraded to the same level of high-speed interface. This is also the reason why the home ONU must be upgraded when the system is upgraded and the main reason for the high cost of upgrading, which is bound to bring a huge burden of repeated investment to network operations.

[0011] 4) In terms of downstream data transmission, whether it is unicast data or multicast data of users, OLT transmits all in broadcast mode, and ONU selectively receives the data it wants. However, the amount of downstream broadcast data is not fixed. When the number of user requests reaches a certain level, the limited downstream bandwidth will still affect the user experience. At the same time, a very high security mechanism must be in place to protect the security of user data.

[0012] 5) Uplink data is transmitted in a time-division multiplexing manner. Multiple ONUs transmit data according to the window time allocated by the OLT. In order to reduce the cost of home ONUs, traditional PON systems generally adopt an asymmetric solution with large downstream and small upstream. When the business is busy, insufficient upstream bandwidth is prone to occur, affecting user experience.

[0013] 6) In traditional PON equipment, although the ONU of each manufacturer meets the user-side access network interface definition specifications, each manufacturer's LOT and ONU have some private protocols, which affects the interconnection and interoperability between LOT and ONU of different manufacturers.

[0014] 7) PON network, in order to achieve broadcasting services, communication services, and broadband Internet services sharing the same transmission channel resources, the transmission of radio and television services uses IPTV (Internet Protocol Television System) technology, especially in the transmission of radio and television live broadcast services, which are also transmitted according to interactive multicast technology. The results are: first, more multicast replication points are built in the core network to reduce the pressure of multicast services on the access network, resulting in an increase in the investment cost of core network equipment; second, multicast service protection bandwidth must be reserved in the transmission link, increasing the investment cost of network bandwidth; third, in order to transmit large-grained long-connection video services on limited household bandwidth, the video service is deeply compressed, which makes it impossible to achieve broadcast-level transmission quality and meet the broadcast-level standard transmission of 4K / 8K ultra-high-definition programs. Even if the video bit rate is greatly compressed and the multicast replication transmission technology is used, these services still occupy a large amount of bandwidth resources in the core network and access network in the transmission network. At least 30% of the protection bandwidth needs to be reserved in the transmission link. If the traffic bandwidth of the live program itself is added, the live broadcast service will consume more than 40% of the network bandwidth of the total resources of the transmission system. This is a huge consumption of network resources, which is also the fundamental reason for the continuous upgrading and expansion of PON networks. In order to save as much resource consumption as possible, IPTV technology must first increase the investment in core network replication points, and secondly, compress the video bit rate of broadcasting and television services as much as possible, which results in the transmission program quality failing to meet the broadcast-level transmission quality, especially the transmission of 4K and 8K ultra-high-definition programs in the future, which is a big challenge.

[0015] Currently, no effective solution has been proposed to address the technical problems of high operation and maintenance costs and low user experience in existing PON technology access networks. Summary of the invention

[0016] The purpose of this application is to provide a multi-service multiplexing exclusive optical fiber access network system based on Ethernet technology, which can provide users with a larger access bandwidth and reduce the cost of upgrading.

[0017] A multi-service multiplexing exclusive optical fiber access network system based on Ethernet technology, comprising: a central office equipment multi-service multiplexer, an optical cable connection terminal board in a central office box, a multi-core optical cable from the central office box to the corridor box, a terminal board in the corridor box and an optical fiber entering the home, wherein:

[0018] The core network side of the central office equipment multi-service multiplexer is provided with a communication service interface, a broadband Internet service interface, a data service interface and a multicast service interface;

[0019] The user side of the central office equipment multi-service multiplexer is connected to the multi-core optical cable from the central office box to the corridor box through a multi-core pigtail adapter, a multi-core pigtail and an optical fiber terminal board in the central office box;

[0020] Among them, each core of the multi-core optical cable from the central office box to the corridor box is connected to the incoming optical fiber of each fiber-to-the-home user through the corridor box terminal board, so that each fiber-to-the-home user can achieve multi-service access by using an exclusive optical fiber to access the multi-service multiplexer of the central office equipment.

[0021] In one embodiment, the central office equipment multi-service multiplexer includes: a secondary multiplexing and demultiplexing unit, a multicast service unit, a primary and secondary power supply unit, and M primary multiplexing and demultiplexing units, where M is a positive integer, wherein:

[0022] The secondary multiplexing and demultiplexing unit includes: a service side core network data service interface, a secondary multiplexing and demultiplexing module, a network management interface, a network management module, a main control CPU module, a storage module, an I / O management CPU module, and M data service interfaces that can be connected to M primary multiplexing and demultiplexing units;

[0023] The multicast service unit includes: a core network side multicast service interface, a multicast service relay module and M multicast service interfaces that can access M primary multiplexing and demultiplexing units;

[0024] The main and standby power supply unit comprises: a main and standby power supply module and a main and standby power supply management module;

[0025] The first-level multiplexing and demultiplexing unit includes: a data service interface and a multicast service interface that can be connected to the second-level multiplexing and demultiplexing unit and the multicast service relay module, a first-level multiplexing and demultiplexing module, W user-side multi-channel integrated optoelectronic conversion transceiver devices, multi-core pigtails and multi-core pigtail adapters, where W is a positive integer.

[0026] In one embodiment, the core network side of the secondary multiplexing and demultiplexing unit is provided with a multi-rate service function interface having an access network SNI function node to meet the connection requirements with the core network, wherein the multi-rate includes the following: 10G, 25G and 100G;

[0027] The secondary multiplexing and demultiplexing unit includes: an optional rate data service interface for accessing M primary multiplexing units to meet the access requirements of the M primary multiplexing and demultiplexing units, wherein the optional rates include: 10G and 25G.

[0028] In one embodiment, each first-level multiplexing and demultiplexing unit is provided with a 10G or 25G data service interface connected to the second-level multiplexing and demultiplexing unit, and is connected to one of the M data service interfaces provided by the second-level multiplexing and demultiplexing unit through the 10G or 25G data service interface to realize the access, cross-connection, multiplexing and transmission functions of communication services, broadband Internet services and data services.

[0029] Each primary multiplexing and demultiplexing unit is also provided with a 10G or 25G multicast service interface connected to the multicast service unit, and is connected to one of the M multicast service interfaces provided by the multicast service unit through the 10G or 25G multicast service interface, so as to forward the content requested by the user to listen or watch to the user through the multicast to unicast mechanism;

[0030] The first-level multiplexing and demultiplexing unit is provided with a user interface with a selectable rate of Gigabit or 10 Gigabit and the function of the access network user function node UNI, and is converted into a multi-channel optical interface through a multi-channel integrated optoelectronic conversion transceiver on the user side, and then the pigtail of the multi-channel optical interface is adapted into a multi-core pigtail, and then connected to the multi-core pigtail adapter, and each pigtail of the multi-core pigtail adapted by the multi-core pigtail adapter is connected to a single-core optical fiber exclusively used by each user of the access network, so that each user has an exclusive single-core optical fiber access to the user-side interface of the multi-service multiplexer of the central office equipment.

[0031] In one embodiment, the number of user interfaces set in each first-level multiplexing and demultiplexing unit is m, and the value of m is one of the following: 48, 64, 96, and it is converted into a multi-channel optical interface through W multi-channel integrated optoelectronic conversion and transceiver devices, and the value of W is one of the following: 4, 6, 8, where m and W are positive integers.

[0032] In one embodiment, the user-side multi-channel integrated optoelectronic conversion transceiver of the primary multiplexing and demultiplexing unit includes: a multi-grid integrated optical transceiver core mounting base, a pigtail fiber compartment, a multi-core pigtail lead-out hole, a multi-core pigtail, and a multi-core pigtail adapter female head, wherein:

[0033] An integrated base with L grids is provided in each multi-channel integrated optoelectronic conversion and transceiver device. In each grid, an optoelectronic conversion tube core with 1 receiving and 1 transmitting, a preamplifier circuit, a combiner / splitter wave plate, a pigtail adapter and a single-core pigtail led out of the pigtail adapter are installed respectively. The single-core pigtail led out of the combiner / splitter wave plate in each grid is orderly coiled in a fiber coiling cabin at the rear end of the L grid integrated base, and then converged into a multi-core pigtail with L cores. The multi-core pigtail with L cores is fixed in the fiber coiling cabin for tensile resistance, and then led out through the lead-out hole of the fiber coiling cabin. After the led-out multi-core pigtail reserves a preset length, it is connected to the multi-core pigtail adapter female head, wherein L is a positive integer, and the value of L is one of the following: 12, 16, 24.

[0034] In one embodiment, it further includes: a home-end device, wherein the home-end device includes: an optical-to-electrical converter and a home electrical-port router, wherein:

[0035] The photoelectric converter includes: an optical module, a transceiver module, a network port adapter and an RJ45 interface, wherein the optical module is connected to the home optical fiber, and the RJ45 interface is connected to the home electrical port router.

[0036] In one embodiment, it also includes: a home-end device, the home-end device includes: a home fiber optic router, the home fiber optic router directly uses the optical port as the WAN port, the optical port rate is gigabit, the home fiber optic router includes: an optical module, a transceiver module, a network port adapter, an RJ45 interface, a routing module, a WiFi module, and a USB interface, wherein the optical module is connected to the home optical fiber and is connected to the home application terminal through the WiFi module and the RJ45 interface to provide access to broadband Internet services, data communication services, and IPTV multicast services.

[0037] In one embodiment, the method further comprises: a plurality of fiber-to-the-home users, the fiber-to-the-home users access the network in a single-fiber dual-wavelength access mode, wherein:

[0038] The single-fiber dual-wavelength home-entry mode includes: one core home-entry optical fiber, utilizing the multi-service multiplexing function and forwarding function of the multi-service multiplexer of the central office equipment, using one downstream wavelength and one upstream wavelength on the single core home-entry optical fiber to transmit the communication services, broadband Internet services and cable TV services required by users.

[0039] In one embodiment, the service side of the multi-service multiplexer of the central office equipment provides data service interfaces for communication services and broadband Internet, and independently sets up multicast service interfaces to improve the transmission quality of multicast services and the efficiency of access network links; the user side of the multi-service multiplexer of the central office equipment provides each user with an optical interface with an optional rate of 1 Gigabit or 10 Gigabit, and through multiple multi-core pigtails, the multi-core optical cable from the central office box to the corridor box and the access optical fiber, each user is connected to the user-side interface of the multi-service multiplexer of the central office equipment with a single-core optical fiber from the central office to the user, so that each user exclusively enjoys an interface resource on the user side of the multi-service multiplexer of the central office equipment to form a point-to-point star structure access network.

[0040] In the above example, a multi-service multiplexing exclusive optical fiber access network system based on Ethernet technology is provided, which includes: a multi-service multiplexer of the access network central office equipment, an ODF terminal board in the central office cabinet, a multi-core optical cable from the central office cabinet to the corridor cabinet, an ODF terminal board in the corridor cabinet, a single-core home optical fiber from the corridor cabinet to the user, and multiple home-end devices. Among them: the multi-service multiplexer provides an independent user interface for each user, and is connected to the multi-core optical cable from the central office to the corridor in the central office cabinet through its multi-core pigtail adapter, multi-core pigtail and ODF terminal board in the central office cabinet; the home optical fiber of each user is connected to the multi-core optical cable from the central office to the corridor through the ODF terminal board in the corridor cabinet, so that each user can access the user interface of the multi-service multiplexer of the central office equipment in a star structure with an exclusive single-core optical fiber from the central office to the home end, and access the user-end optical fiber router, realizing a multi-service multiplexing access network system based on Ethernet technology. The above solution solves the technical problems of high home access cost, small access bandwidth and high upgrade cost caused by the need to set up the access network device ONU in the user's home in a 1:N splitting method in the existing PON network, thereby achieving the technical effect of providing users with a larger access bandwidth and realizing low-cost upgrades. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0042] Figure 1 It is a schematic diagram of the location of the access network in the data network;

[0043] Figure 2 It is a schematic diagram of access network interface definition;

[0044] Figure 3 It is a schematic diagram of the PON technology access network structure;

[0045] Figure 4 This is a schematic diagram of the structure of a multi-service multiplexing access network based on Ethernet technology provided by this application;

[0046] Figure 5 This is a schematic diagram of a multi-service multiplexing access network system based on Ethernet technology provided by the present application;

[0047] Figure 6 It is a schematic diagram of the principle of a multi-service multiplexing access network multi-service multiplexer provided by the present application;

[0048] Figure 7It is a schematic diagram of a multi-channel integrated photoelectric conversion device for a multi-service multiplexing access network provided by the present application;

[0049] Figure 8 This is a schematic diagram of the principle of the multi-service multiplexing access network user-side photoelectric converter provided by the present application;

[0050] Fig. 9 This is a schematic diagram of the principle of a multi-service multiplexing access network user-side optical fiber router provided by this application;

[0051] Fig.10 It is a schematic diagram of a switch access network where the switch is at the central end of the access network;

[0052] Fig.11 It is a schematic diagram of the principle of the plug-in type model of the multi-service multiplexing access network multi-service multiplexer provided by the present application;

[0053] Fig.12 This is a schematic diagram of the principle of a multi-service multiplexing access network multi-service multiplexer mother-child machine model provided by the present application;

[0054] Reference numerals in the above drawings:

[0055] 1. Multi-service multiplexer; 2. Network management interface; 3. Core network data service interface; 4. Core network multicast service interface; 5. Multi-core pigtail adapter; 6. Multi-core pigtail outside the box (i.e., adapted pigtail); 7. ODF terminal board inside the central office box; 8. Multi-core optical cable; 9. ODF terminal board inside the corridor box; 10. Entrance optical fiber; 11. Entrance user; 12. Optical fiber transceiver; 13. Home electrical port router; 14. Optical fiber router; 15 , secondary multiplexing and demultiplexing unit; 16, network management module; 17, storage module; 18, secondary multiplexing and demultiplexing module; 19, main control CPU module; 20, I / O management CPU module; 21, data interface; 22, main and standby power supply unit; 23, multicast service unit; 24, multicast service relay module; 25, power bus; 26, control bus; 27, multicast service interface for multicast service unit; 28, primary multiplexing and demultiplexing unit; 29, primary multiplexing module; 30, user side data interface; 31, multi-channel integrated optoelectronic conversion transceiver; 32, multi-core pigtail in the box (i.e., pigtail before adaptation); 33, optical module; 34, transceiver module; 35, network port adapter; 36, RJ45 interface; 37, router module; 38, WiFi module; 39, USB interface; 40, plug-in interface; 41, daughter board; 42, data service interface on the host user side; 43, all-optical 44. Multicast service relay forwarding module; 45. Slave; 46. Data service interface on the slave service side; 47. Multicast service interface on the slave service side; 61. Transmitter core lead-out pin; 62. Receiver core lead-out pin; 63. Grid; 64. Pigtail coil compartment; 65. Multi-channel pigtail lead-out hole; 67. Multi-core pigtail adapter female head; 68. Multi-core pigtail adapter seat; 69. Multi-core pigtail adapter male head. DETAILED DESCRIPTION

[0056] 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 below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0057] In view of the high cost of upgrading the access network of the existing PON technology, the cost increase mainly comes from: first, the optical port of OLT and ONU is upgraded from 1000M to 1000M, and the user-side ONU needs to be replaced when the central office equipment is upgraded; second, the equipment chip is upgraded from 1000M processing chip to 1000M processing chip, and in the future, it will even be upgraded to 25GPON, 50GPON, or NGPON, TWDM-PON, so the investment cost will increase significantly. Although the cost of upgrading has increased greatly, the improvement of user access bandwidth is limited, which will lead to the continuous upgrading of PON network. The life cycle of equipment in the network is much shorter than the life cycle of the equipment itself, which leads to the need for operators to upgrade many times in order to meet the continuous improvement of user access bandwidth.

[0058] The reason for the above problems is that N users share a PON port bandwidth resource under 1:N optical splitting. In order to provide users with greater access bandwidth, the PON network has a development trend from the current GPON and 10GPON to 50GPON, NGPON and TWDM-PON. At this time, the technology of the central office equipment and terminal gateway is more complex and the cost will be higher, especially TWDM-PON, which superimposes wavelength division multiplexing technology on the current time division multiplexing technology, and the equipment cost will be higher. Although the development of the PON network from the current EPON, GPON, XG-PON to 50GPON, NGPON and TWDM-PON is to better protect the original network architecture and the original investment in optical fiber media, this protection is not objected when the optical fiber media is expensive. However, the price of optical fiber media bare fiber has dropped from 1,000 yuan / core kilometer to 50 yuan / core kilometer. If the already low media cost is still protected by upgrading expensive equipment technology, the best adaptation of transmission media and equipment technology will be lost, resulting in repeated investment costs and higher upgrade costs.

[0059] Based on this, this example provides a multi-service multiplexing exclusive optical fiber access network system based on Ethernet technology, and its structure is as shown in the attached figure. Figure 4 The system diagram is shown in the attached Figure 5 As shown, it includes: a central office equipment multi-service multiplexer 1, an ODF terminal board 7 in the central office box, a multi-core optical cable 8 from the central office box to the corridor box, an ODF terminal board 9 in the corridor box, a single-core home optical fiber 10 for each user, and multiple home-end devices, wherein:

[0060] The multi-service multiplexer is connected to the multi-core optical cable 8 from the access network central office box to the corridor box through the multi-core pigtail adapter 5, the multi-core pigtail 6 outside the box and the ODF terminal board 7 inside the central office box;

[0061] Each core of the multi-core optical cable 8 from the central office box to the corridor box is connected to each household's access optical fiber 10 through the ODF terminal board 9 in the corridor box, so that each fiber-to-the-home user 11 can access the Gigabit / 10 Gigabit rate user interface of the multi-service multiplexer through a dedicated core optical fiber.

[0062] The home electrical port router 13 of the fiber-to-the-home user can be connected to the home optical fiber 10 through the optical fiber transceiver 12, and can also be equipped with an optical fiber router 14 to connect to the home optical fiber 10.

[0063] Specifically, the multi-service multiplexer 1 can be as follows: Figure 6 As shown, it includes: a secondary multiplexing and demultiplexing unit 15, a multicast service unit 23, a primary and secondary power supply unit 22 and 1 to M primary multiplexing and demultiplexing units 28, wherein:

[0064] 1) The secondary multiplexing and demultiplexing unit may include: a core network data service interface 3, a secondary multiplexing and demultiplexing module 18, a network management interface 2, a network management module 16, a main control CPU module 19, a storage module 17, an I / O management CPU module 20, and a data interface 21 that can be connected to M primary multiplexing and demultiplexing units;

[0065] 2) The multicast service unit may include: a core network multicast service interface 4, a multicast service relay module 24, and a multicast service interface 27 for the multicast service unit that can be connected to M primary multiplexing and demultiplexing units. After receiving all IPTV multicast services of the core network through an independent channel, the multicast service unit transmits them to each primary multiplexing and demultiplexing unit 28 in the multi-service multiplexer after relay shaping. Through the multicast-to-unicast mechanism in the primary multiplexing and demultiplexing unit and the large home bandwidth, the IPTV live content is directly forwarded to the user;

[0066] 3) The active / standby power supply unit 22 may include: an active / standby power supply module and an active / standby power supply management module;

[0067] 4) The primary multiplexing and demultiplexing unit 28 may include: a data interface 21 for the secondary multiplexing and demultiplexing unit, a multicast service interface 27 for the multicast service unit, a primary multiplexing module 29, 1 to W multi-channel integrated optoelectronic conversion transceiver devices 31 on the user side, a multi-core fiber pigtail 32 in the box, and a multi-core fiber pigtail adapter 5.

[0068] The above-mentioned multi-service multiplexer can be equipped with M first-level multiplexing and demultiplexing units 28. The first-level multiplexing module 29 in each first-level unit can provide m Gigabit or 10 Gigabit user-side data interfaces 30 on the user side. These m Gigabit or 10 Gigabit user interfaces can be converted into optical interfaces through W L-channel multi-channel integrated optoelectronic conversion and transceiver devices 31. After the pigtails of the L optical interfaces are adapted into W L-core multi-core pigtails, they are connected to the multi-core pigtail adapter 5, and each core pigtail of the multi-core pigtail adapted by the multi-core pigtail adapter 5 is connected to a single-core optical fiber exclusively used by each user in the access network.

[0069] The above-mentioned multi-channel integrated photoelectric conversion transceiver device at the user side of the first-level multiplexing and demultiplexing unit can be as follows Figure 7 As shown, it includes: an integrated base of a multi-channel integrated optoelectronic converter in which optical transceiver cores, preamplifier circuits and combiner / splitters are installed respectively in L grids 63, a transmitting core lead-out pin 61, a receiving core lead-out pin 62, a pigtail coil compartment 64 for each transceiver core, a multi-core pigtail lead-out hole 65, a multi-core pigtail 32 in the box, a multi-core pigtail adapter female head 67, a multi-core pigtail adapter seat 68 on the chassis panel, a multi-core pigtail adapter male head 69 outside the chassis, and a multi-core pigtail adapted from the multi-service multiplexer chassis to the optical fiber terminal board of the local end cabinet.

[0070] That is, a multi-channel integrated optoelectronic conversion tube core leads out a pigtail fiber winding compartment 64, and each optoelectronic conversion transceiver tube core is adapted to lead out a pigtail, which is orderly coiled in the pigtail fiber winding compartment 64 and combined into a multi-core pigtail 32 in the box, and then led out through the multi-core pigtail lead-out hole 65, and the led-out multi-core pigtail is adapted to the multi-core pigtail adapter female head 67, and is connected to the multi-core pigtail adapter male head 69 outside the chassis through the multi-core pigtail adapter seat 68 on the chassis panel, and the multi-core pigtail adapted by the multi-core pigtail adapter male head 69 is connected to the multi-core optical cable of each user of the access network with a single-core optical fiber, so as to provide each user with broadband service access with a single-core optical fiber.

[0071] Among them, the pigtails led out from each grid are coiled in order in the fiber coiling cabin at the rear end of the integrated base and gathered into a multi-core pigtail bundle. The pigtail bundle is fixedly led out through the lead-out hole, and after reserving a predetermined length, it is packaged in the female head of the multi-core pigtail adapter. The female head of the multi-core pigtail adapter is inserted into the multi-core pigtail adapter seat on the chassis panel, and connected to the male head of the multi-core pigtail adapter outside the chassis through the multi-core pigtail adapter seat.

[0072] That is, the core parts of the above-mentioned multi-service multiplexer are: a secondary multiplexing and demultiplexing unit, a multicast service relay unit and M primary multiplexing and demultiplexing units, wherein the secondary multiplexing and demultiplexing unit and the multicast service relay unit respectively provide 10G / 25G rate data service interfaces that can be accessed to the M primary multiplexing and demultiplexing units, and each primary multiplexing and demultiplexing unit respectively provides a 10G / 25G rate data service interface that can be accessed to the secondary multiplexing and demultiplexing unit and a 10G / 25G rate multicast service interface that can be accessed to the multicast service relay unit, wherein the number of primary multiplexing and demultiplexing units and their interfaces M can be but are not limited to: 4, 6 and 8.

[0073] Among them, the user side of the primary multiplexing and demultiplexing module of each primary multiplexing and demultiplexing unit can provide m 1000M / 1000M selectable rate user interfaces, and the number of user interfaces m can be but not limited to: 48, 64 and 96. Specifically, each primary multiplexing and demultiplexing module can be equipped with W multi-channel integrated optoelectronic conversion transceiver devices to realize the electrical-to-optical and optical-to-electrical conversion of the electrical signals of the user side interface of the primary multiplexing and demultiplexing module, and the number of W can be but not limited to: 4, 6 and 8.

[0074] In one embodiment, the number of paths L of each multi-channel integrated optoelectronic conversion transceiver device can be, but is not limited to, 12, 16, and 24. The pigtails drawn from the L-channel optoelectronic conversion transceiver devices are gathered into multi-core pigtails. Further, the multi-core pigtails are adapted to the multi-core pigtail adapter female head to form a multi-channel integrated optoelectronic conversion transceiver. Each multi-service multiplexer can provide N=M*W multi-core pigtail adapters.

[0075] That is, M (the number of interfaces between the first-level multiplexing and demultiplexing module and the first-level and second-level multiplexers) may include but is not limited to: 4, 6 and 8; m (the number of user-side interfaces of each first-level multiplexing and demultiplexing module) may include but is not limited to: 48, 64 and 96; W (the number of multi-channel optoelectronic converters or the number of multi-core pigtails in each first-level multiplexing and demultiplexing unit) may include but is not limited to: 4, 6 and 8; L (the number of channels of multi-channel integrated optoelectronic converters or the number of cores in multi-core pigtails) may include but is not limited to: 12, 16 and 24; N (the number of multi-core pigtail adapters for each multi-service server) may include but is not limited to M*W, so that the number of access users of each multi-service multiplexer is n=M*W*L=M*m=N*L in various combinations, and n may include but is not limited to: 192, 256, 384, 512 and 768 users.

[0076] The core network data service interface 3 and the core network multicast service interface 4 on the above-mentioned service side have the SNI function of the access network service function node, the network management interface 2 has the Q node function of the access network management node, and the user side of the multi-service multiplexer provides a Gigabit or 10 Gigabit optical interface with the UNI function of the access network user node.

[0077] In one embodiment, the home terminal device may include: an optical-to-electrical converter and a home electrical port router, wherein: the optical-to-electrical converter may be as follows: Figure 8 As shown, it includes: an optical module 33, a transceiver module 34, a network port adapter 35 and an RJ45 interface (GE) 36, wherein the optical module is connected to the home optical fiber 10, and the RJ45 interface is connected to the home electrical port router 13 to achieve multi-service access.

[0078] In another embodiment, the home terminal device may further include: a home fiber optic router, which may be Fig. 9 As shown, the optical port is directly used as the WAN port, and the optical port rate is 1000M. The home fiber optic router may include: an optical module 33, a transceiver module 34, a network port adapter 35, an RJ45 interface 36, a router module 37, a WiFi module 38, and a USB interface 39, wherein the optical module is connected to the home optical fiber 10, and is connected to the home application terminal through the WiFi module and the RJ45 interface to provide access to broadband Internet services, data communication services, and IPTV multicast services.

[0079] That is, in the above example, a multi-service multiplexing access network system based on Ethernet technology is provided, which is composed of multi-core pigtails from the multi-service multiplexer of the optical fiber access network central office equipment to the optical cable connection terminal board in the central office cabinet (i.e., the ODF terminal board in the central office cabinet), multi-core optical cables from the ODF terminal board in the central office cabinet to the ODF terminal board in the corridor cabinet, the ODF terminal board in the corridor cabinet to the user's home optical fiber, the optical-electrical converter of the optical fiber user, and the home router or optical fiber router. Each user has access to the central office equipment with an exclusive core optical fiber, which can include but is not limited to a Gigabit / 10 Gigabit (optional) rate interface, thereby forming a point-to-point star structure network based on Ethernet technology in which each user has an exclusive core optical fiber.

[0080] The above-mentioned multi-service multiplexing access network system based on Ethernet technology can meet the interface functions and core functions of the access network, wherein the secondary multiplexing and demultiplexing unit and the primary multiplexing and demultiplexing unit of the multi-service multiplexer can adopt FPGA chips or special chips that meet the access network definition code, and meet the protocol functions of the Ethernet data link layer and the physical layer, wherein the protocol functions of the link layer and the physical layer can include but are not limited to the maintenance and management of the MAC address table, VLAN management, cache filtering and forwarding of data frames, DHCP relay, QoS and port security, so as to realize the cross-connection, multiplexing and transmission functions of the access network. Furthermore, in order to reduce the access network coverage cost and home access cost, and to meet the characteristics of the access network with different sizes of network paths, costs related to users, many types of access services, low traffic density, high interface density and low coverage cost, a switching function that does not include ports can be set. Among them, the core network data service interface and the core network multicast service interface on the service side of the multi-service multiplexer have the SNI function of the access network service function node, the network management interface has the Q node function of the access network management node, and the user side of the multi-service multiplexer provides a Gigabit or 10 Gigabit rate optical interface, and the rate optical interface has the UNI function of the access network user node.

[0081] Furthermore, the user side provides high-density interfaces, which effectively reduces the coverage cost and the cost of accessing the home. Specifically, the central office equipment multi-service multiplexer adopts a structure that equips a secondary multiplexing and demultiplexing unit with multiple primary multiplexing and demultiplexing units, which is conducive to improving the interface density on the user side of the multiplexer. In order to reduce the coverage cost and the cost of accessing the home, the user side of the central office equipment multi-service multiplexer meets the requirements of different sizes of access network paths, user-related costs, a large number of access network services, low service density, high interface density and low coverage cost.

[0082] In order to meet the needs of high-density optical ports and multi-user access, in this example, each multi-service multiplexer consists of a secondary multiplexing and demultiplexing unit, a multicast service relay unit and M primary multiplexing and demultiplexing units. The number of primary multiplexing and demultiplexing units M may include but is not limited to 4, 6 and 8; wherein the secondary multiplexing and demultiplexing unit and the multicast service relay unit respectively provide 10G / 25G rate data service interfaces that can be accessed to M primary multiplexing and demultiplexing units, and each primary multiplexing and demultiplexing unit respectively provides a 10G / 25G rate data service interface that can be accessed to the secondary multiplexing and demultiplexing unit and a 10G / 25G rate multicast service interface that can be accessed to the multicast service relay unit, wherein the number of interfaces M may include but is not limited to: 4, 6 and 8; the primary multiplexing and demultiplexing module of each primary multiplexing and demultiplexing unit can provide m 1000M / 1000M optional rate user interfaces on the user side, and the number of user interfaces m may include but is not limited to 48, 64 and 96; each one The first-level multiplexing and demultiplexing module can be equipped with W multi-channel integrated optoelectronic conversion transceiver devices to realize the electrical-to-optical and optical-to-electrical conversion of the electrical signals of the user interface of the first-level multiplexing and demultiplexing module. The number W of the multi-channel integrated optoelectronic conversion transceiver devices can include but is not limited to 4, 6 and 8; each multi-channel integrated optoelectronic conversion transceiver device integrates L optoelectronic conversion channels inside, and the pigtails led out of the L optoelectronic conversion transceiver devices are converged into multi-core pigtails. Further, the multi-core pigtails are adapted to the multi-core pigtail adapter female head to form a multi-channel integrated optoelectronic conversion transceiver. The number of channels L can include but is not limited to 12, 16 and 24; each of the above-mentioned multi-service multiplexers can provide N=M*W multi-core pigtail adapters, so that each multi-service multiplexer can access multiple combinations of n=M*W*L=M*m=N*L, that is, it can access but is not limited to 192, 256, 384, 512 and 768 users, thereby effectively reducing the access network coverage cost and household access cost.

[0083] In order to improve the link utilization of the core network and access network and reduce the investment cost of the core network and access network equipment, considering that the multi-service multiplexer has a unique multicast service processing solution, an independent channel is used to process the multicast service, thereby improving the transmission quality of the multicast service. Specifically, a 10G / 25G / 100G optional rate communication service, broadband Internet service and data service interface can be set on the service side of the multi-service multiplexer of the central office equipment, but for the cable TV IPTV service, it is not connected to the above interface, but an independent 10G / 25G optional multicast service interface is set to access the IPTV multicast service through an independent interface.

[0084] By independently setting up a 10G / 25G optional multicast service interface, the IPTV multicast service can be transmitted in the core network in a multicast relay manner. Compared with the existing multicast replication mode transmission of IPTV multicast service, communication service, and broadband Internet service sharing the transmission channel, there is no need to increase the investment in multicast replication point equipment in the core network. Furthermore, since IPTV multicast services are transmitted in the core network and access network according to the multicast relay mechanism, there are no delays and bandwidth limitations caused by multiple routing exchanges and multicast replication points in the core network. Furthermore, all multicast services are transmitted to the multicast service relay module of the multi-service multiplexer through multicast relay, and connected to the first-level multiplexing and demultiplexing module closest to the user. Furthermore, the multicast-to-unicast mechanism of the first-level multiplexing and demultiplexing unit and the first-level multiplexing and demultiplexing module are used to provide each user with a high-speed access bandwidth of 1G / 10G, and the multicast services that users want to listen to and watch are forwarded according to the multicast-to-unicast mechanism, so that the transmission quality of high-definition, ultra-high-definition 4K / 8K, and AR / VR live video of cable TV IPTV services fully meets the broadcast-level transmission standard, and the packet loss rate index is difficult to achieve when using the existing routing exchange and multicast replication transmission mode. No more than 10 -4 Compared with the above, it can reach no more than 10 -6 .

[0085] Furthermore, the user side of the multi-service multiplexer provides each user with access bandwidth including but not limited to 1G / 10G (optional) speeds. If the primary multiplexing / demultiplexing unit of the multi-service multiplexer can provide each user with an average of 200M communication services and broadband Internet data service processing capabilities and a concurrency rate of 50%, the average dynamic bandwidth for communication services and broadband Internet data services can reach 400M, and these concurrent users still have 600M multicast service access bandwidth. That is, when the multi-service multiplexer provides an average of 400M communication services and broadband Internet data service bandwidth to 100% of users, each user still has 600M multicast service access bandwidth, ensuring that the transmission quality of high-definition, ultra-high-definition 4K / 8K, and AR / VR video services in IPTV multicast services can fully meet broadcast-level transmission standards, solving the problem that the communication operator network cannot provide high-quality video services due to deep compression of live service content in IPTV multicast services. In addition, because the existing operator network transmits IPTV multicast services in a shared transmission channel mode with communication services and broadband Internet services, in order to ensure the transmission of IPTV multicast services, 30% of the protection bandwidth is reserved for IPTV multicast services in the transmission link, which will inevitably make the link utilization rate only reach 70%. However, in this example, by introducing a multi-service multiplexer and setting an independent interface for the multi-service multiplexer to access the IPTV multicast service, the network link utilization rate can be increased to 100%. In other words, the best adaptation of equipment technology and transmission media is achieved, thereby achieving the purpose of providing a larger access bandwidth at a lower cost.

[0086] The existing access network PON technology passive optical network access network principle diagram is as follows Figure 3As shown in the figure, the access network is mainly composed of the central office equipment OLT, the home gateway ONU and the tree-structured ODN optical fiber connecting the OLT and the ONU. Moreover, the PON technology adopts the tree-shaped network structure and time division multiplexing technology under each PON port of the OLT, where multiple users share one PON port and one core optical fiber and access N home users through 1:N splitting. Therefore, each family must be equipped with a home gateway ONU, the so-called optical modem, which is connected to the CPN network composed of the home WiFi router through the optical modem. The result is: first, the access bandwidth is low. After the optical splitter, multiple ONUs share one PON port resource. Under the condition of 1:N splitting, 1 / N of the PON port bandwidth resources are obtained. Even if the PON port works at a gigabit rate, the average bandwidth of each user is only tens of M rate when the splitting is 1:32. Second, the repeated investment cost caused by continuous upgrading is high. Since each PON port of the PON network connects to N users after 1:N splitting, the bandwidth allocated to each user is low, so PON equipment is constantly upgraded to meet users' greater bandwidth needs, which undoubtedly brings a huge burden of repeated investment to network operations. Although the development of PON networks from the current EPON and GPON to XG-PON, 50GPON, NGPON and TWDM-PON is to better protect the original network architecture and the investment in the original optical fiber media, the equipment technology is becoming more and more complex, the chip working rate is getting higher and higher, and the equipment cost is getting higher and higher. This kind of protection is unquestionable when the optical fiber media is expensive. However, the price of optical fiber media bare fiber has dropped from 1,000 yuan / core kilometer to 50 yuan / core kilometer. If the already low media cost is still protected by upgrading expensive equipment technology, the cost will be higher.

[0087] Based on this, in this example, a dedicated fiber access network based on Ethernet technology with multiple services is provided, which replaces the access method in which the operator's asset ONU must enter the household in the PON network with dedicated fiber media for each household, and achieves the effect of exchanging the household device ONU for the fiber media. In addition, the cost of the fiber media is lower than the cost of the ONU equipment, and the life span is much longer than the life span of the ONU equipment. First, the upgrading of the central office equipment has nothing to do with the user, and second, the life cycle of the equipment in the network is longer than the life cycle of the equipment itself, thereby greatly reducing the repeated investment cost caused by the operator's upgrading, achieving the best adaptation of equipment technology and transmission media, and bringing greater investment benefits to the operator.

[0088] Furthermore, the multi-service multiplexer provides each user with a user interface that exclusively uses gigabit physical resources. The device's operating rate is much lower than the current 10G rate of the PON network, and even lower than the future 50GPON, NGPON, and TWDM-PON. However, the access bandwidth provided to users is no lower than the access bandwidth after 1:N splitting of the future 50GPON, NGPON, and TWDM-PON networks, and can provide each user with a gigabit or 10G access bandwidth. Furthermore, because the device works at a low rate but provides users with a large access bandwidth, it achieves low investment costs and energy conservation and environmental protection.

[0089] Furthermore, the access network in this example can also provide higher access bandwidth at a low construction cost. The user side of the multi-service multiplexer provides, including but not limited to, 192, 256, 384, 512, and 768 optical interfaces including but not limited to Gigabit / 10 Gigabit rates, providing users with exclusive access bandwidth of one core optical fiber including but not limited to Gigabit / 10 Gigabit rates, surpassing the access bandwidth of 780M per household in the future 50GPON when 64 splits, and can also develop to 10 Gigabit access bandwidth for each user, but its cost will be lower than 50GPON, truly realizing the best adaptation of equipment technology and transmission media, and providing higher access bandwidth at a low cost. Furthermore, the network upgrade and expansion cycle can be extended with high access bandwidth. Specifically, the life cycle of the equipment in the network is much longer than the life cycle of the equipment itself, because the multi-service multiplexer provides each user with exclusive access interfaces including but not limited to Gigabit / 10 Gigabit rates, fundamentally solving the problem of repeated investment required to increase user access bandwidth due to the continuous upgrading of the existing PON network, and bringing better investment benefits and higher return on investment to network operators.

[0090] Furthermore, in the PON network, under the tree structure of shared optical fiber and the time-division multiplexing transmission mechanism, the user's home must be equipped with an access network gateway ONU. Therefore, the PON network has a high cost of access to the home, and the ONU and the central office OLT must be completely corresponding. Therefore, when the local equipment is upgraded, the user-side gateway must be replaced, which brings more secondary investment costs caused by continuous upgrades. For example, when the PON system is upgraded from EPON to GPON, both OLT and ONU must be updated. When it is upgraded from GPON to XG-PON, both OLT and ONU must be updated, resulting in continuous secondary investment costs. However, in a point-to-point transmission system, the upgrade and update of the central office has nothing to do with the user end, and the huge capacity of the optical fiber can be fully utilized without major changes to the underlying structure.

[0091] The schematic diagram of the access network composed of switches can be shown as follows Fig.10 As shown in the access network structure, switches form the access network and Figure 4The Ethernet-based multi-service multiplexing access network is the same. The difference is that on the service side of the switch access network, multicast services, communication services, and broadband Internet services are accessed through the same interface. Furthermore, there is no independent multicast service processing module inside the switch. The multicast service processing mechanism is the same as that of the PON network, and 30% of the protection bandwidth must be reserved. However, for the multi-service multiplexer provided in this example, Figure 4 , Figure 5 and Figure 6 It can be seen that on the service side, multicast services are accessed through a separate channel, and all multicast services are transmitted to the multicast service relay module of the multi-service multiplexer through multicast relay, and are accessed to the first-level multiplexing and demultiplexing module closest to the user. Furthermore, the multicast-to-unicast mechanism of the first-level multiplexing and demultiplexing unit and the first-level multiplexing and demultiplexing module are used to provide each user with a high-speed access bandwidth of 1G / 10G, and the multicast services that the user wants to listen to and watch are forwarded according to the multicast-to-unicast mechanism.

[0092] For the above switches, although they are very suitable for use in core networks and metropolitan area networks, they are not suitable for use in access networks in terms of their functions and costs. This is because access networks have multiplexing, cross-connection and transmission functions, and generally do not require switching functions. Switches are generally used in the network layer and data link layer of the OSI architecture, have powerful routing protocols and packet forwarding functions, and support all protocols of the network layer and data link layer. At the same time, the optical ports of general switches generally use single-unit plug-in optical modules. This mode cannot meet the requirements of high-density user interfaces for access networks. Therefore, if switches are used in access networks, it will be difficult to meet the requirements of low-cost coverage and low-cost access of access networks.

[0093] The multi-service multiplexer provided in this example is different from the Ethernet switch. The multi-service multiplexer does not require the switching capability between ports, but must meet the service port function, core function, transmission function, user port function and management function of the access network, and needs to have a strong upstream data aggregation capability and downstream data distribution capability to achieve access network multiplexing, cross-connection and transmission functions. At the same time, according to the characteristics of the access network with many types of services and low traffic density, but high-density interfaces must be provided to reduce coverage costs, a single device must at least access 192, 256, 384, 512, 768 users, so as to significantly reduce the coverage cost of the access network local equipment. Furthermore, the user-side optical port of the multi-service multiplexer in this example is different from the plug-in optical module used by the general switch. The general switch can only accommodate 24 to 48 optical modules in a 1U chassis, which cannot meet the high-density interface requirements of the access network. In a 1536-household access network model, when using a general switch to build an exclusive fiber-optic broadband access network based on Ethernet technology, 32 48-optical port switches are required. However, the multi-service multiplexer in this example adopts an innovative process of integrating multi-channel integrated optoelectronic conversion transceiver and multi-core pigtail adapter. The maximum optical port density of a single device can reach 192, 256, 384, 512, and 768. Similarly, in the access network model of 1536 households, if a 384-port multi-service multiplexer is used to build an exclusive optical fiber broadband access network based on Ethernet technology, only 4 devices are needed to meet the demand. That is, by using the high-density optical interface combined with the multi-channel integrated optoelectronic conversion transceiver and multi-core pigtail adapter proposed in this example, the user-side optical interface of a single device can reach 192, 256, 384, 512, and 768 high-density interfaces. The optical port density is much greater than that of a general switch, thereby meeting the access network's high-density access capability requirements and reducing the access network's coverage cost.

[0094] Furthermore, the Ethernet-based exclusive fiber-optic multi-service multiplexing all-optical broadband access network technology in this example has great cost advantages. Specifically, in this example, a total cost function that reflects the static cost and dynamic cost is established for the access network, and this function is used for comparison on plane coordinates. When only considering the initial coverage cost of the access network and the cost of developing service access, under the premise of the number of households and equipment selection, its cost function can be simplified into the following two-variable linear equation:

[0095] Y=a+bXn

[0096] Among them, Y is the total dynamic cost in the model, a is the total coverage cost in the model, a=XN(a1+a2), where XN is the total number of households covered by the model, a1 is the average cost of the central office equipment per household, a2 is the average cost of the central office to the home ODN per household, bXn is the total home dynamic cost of the model, b is the average cost of the home equipment per household, and Xn is the actual number of homes in the model. Therefore, the above two-variable linear equation can be converted to: Y=a+bXn=XN(a1+a2)+bXn.

[0097] Assume that a model with 1536 households is selected, then XN=1536 households, and according to the data in Table 1 below, according to the binary linear equation Y=XN(a1+a2)+bXn, the dynamic cost relationship of the PON network can be obtained as shown in Table 1 below:

[0098] Table 1

[0099]

[0100] In the PON network, a1=30 yuan / household; a2=50 yuan / household, b=0.027 million yuan / household, and XN=1536 households, then: the total dynamic cost Yp=a+bXn=XN(a1+a2)+bXn, where Yp is the Y value of the PON network at different Xn values.

[0101] If the actual number of households X is increased from 0 to 10% of the total number of households XN, then:

[0102] Yp(0) = 123,000 yuan

[0103] Yp (10%) = 123,000 yuan + 2,700 yuan * (1536 * 10%) = 164,500 yuan

[0104] Yp (20%) = 123,000 yuan + 2,700 yuan * (1536 * 20%) = 206,000 yuan

[0105] Yp (30%) = 123,000 yuan + 2,700 yuan * (1536 * 30%) = 244,400 yuan

[0106] Until Y (100%): Yp (100%) = 123,000 yuan + 2,700 yuan * (1536 * 100%) = 537,720 yuan.

[0107] That is, when the number of households is zero, the x value in Yp=a+bXn is zero, and Yp=a, that is, 123,000 yuan, is the total coverage cost in the 1536-household model. As the number of households increases, the Y value increases according to the slope of b in the total household cost in the Yp=a+bXn equation. When x=XN=1536 households, the total investment Yp=537,720 yuan. It can be seen that the dynamic investment cost of the PON network is related to the household, but it reflects the advantages of low coverage cost of the PON network and continuous investment as the business develops.

[0108] In the proposed technical solution of the Ethernet-based exclusive fiber multi-service multiplexing all-optical broadband access network in this example, the dynamic investment curve function conforms to the function Y=a+bXn, satisfying the characteristic of household access cost b=0. The investment cost curve of the PON network in the model is a straight line Yp=a+bXn=XN(a1+a2)+bXn with a slope of the household cost b, which increases with the increase of the number of households x. The multi-service multiplexing network proposed in this example is Yf=a+bXn=XN(a1+a2)+bXn. Since the household cost b=0, the actual curve of the multi-service multiplexing network is Yf=a+bXn=XN(a1+a2). The curve is a straight line parallel to the x-axis with a constant amplitude of (a1+a2). Therefore, when the straight line Yp=a+bXn=XN(a1+a2)+bXn of the PON network with a slope of the number of households b is in the same plane, the straight line of the multi-service multiplexing network will move downward as the value of (a1+a2) decreases and intersect with the PON network curve. The smaller its (a1+a2) is, the fewer the number of households at the intersection with the PON network investment curve. From the perspective of investment cost, the smaller the number of households, the more ideal the intersection point is. The most ideal intersection point occurs when the number of households X=0. However, since the equipment and ODN costs of the multi-service multiplexer network are higher than those of the PON network, the investment curves of the multi-service multiplexer network and the PON network will not intersect with the PON network curve when the number of households X=0. However, it is hoped that the intersection of the two will occur when the number of households is as small as possible.

[0109] Furthermore, the investment curve of the multi-service multiplexing network is Yf=a+bXn=XN(a1+a2)+bXn. Since b=0 in the bXn term, the Y value of each point of the curve at different X values ​​is Yf=Xn(a1+a2). The connecting line of these points is a straight line parallel to the X axis. If the network and PON network investment curves in this example are drawn on the same plane, the position of the intersection point with the PON network investment curve is mainly determined by the a1 and a2 values ​​of the multi-service multiplexing network Yf=XN(a1+a2). The smaller the a1 and a2 values, the smaller the X value of the number of households corresponding to the intersection point, and the smaller the corresponding X value is. However, the downward shift of the multi-service multiplexer network Yf=XN(a1+a2) is mainly subject to the restrictions of two conditions:

[0110] 1) In the a1 and a2 values ​​of Yf=XN(a1+a2), the a2 value is the average household cost of the ODN part of the multi-service multiplexing network from the access network office to the user. In addition, for the ODN architecture of the multi-service multiplexing network, when the ODN cost of the PON network investment curve is a2=50 yuan / household, if a2=150 yuan in this example network, then the ratio of the two is 3 times, and it is a constant.

[0111] 2) The a1 value in the a1 and a2 values ​​of Yf=XN(a1+a2) is the average value per device per user corresponding to each optical port. It is also impossible to make the a1 value in the a1 and a2 values ​​of Yf=XN(a1+a2) of the multi-service multiplexer network close to the a1 value of the PON network.

[0112] Due to the restrictions of the above two conditions, the intersection point of the straight line parallel to the X axis of the multi-service multiplexing network Yf=XN(a1+a2) and the straight line with the slope value b in the PON network Yp=a+bXn=XN(a1+a2)+bXn on the same plane corresponding to the number of households X value cannot be very small, and it is even more impossible to intersect at X=0. However, if the a1 value of the straight line parallel to the X axis of the multi-service multiplexing network Yf=XN(a1+a2) is made small enough so that the number of households X value at the intersection point is within a reasonable range, a better effect can be obtained.

[0113] Therefore, it is necessary to determine that the value of X corresponding to the intersection of the two investment curves is within a reasonable range. It is hoped that the smaller the value of X, the better. When X=0, it intersects with the PON network curve, which is the most ideal. However, because the average household cost of the ODN architecture of the network in this example is three times that of the PON network, and the number of user-side interfaces of the network central office equipment in this example is far greater than that of the PON network equipment, the average household cost of the network central office equipment in this example is also greater than the average household cost of the PON network. Due to the restrictions of these two conditions, the Yf=XN(a1+a2) of the network in this example, the Y value at X=0 will definitely be greater than the Y value of the PON network at X=0. However, considering the comprehensive factors such as the performance of the multiplexed network and the reduction of continuous investment in upgrading and expansion, it is believed that the intersection point is more appropriate within the range of 60% to 70% of the number of households in the model.

[0114] When the number of households is selected to be equal to 65%, the Yp value of the PON network corresponding to 65% of the number of households is Yp=XN(a1+a2)+bXn=1536 households (30 yuan / household+50 yuan / household)+270 yuan / household*1000 households=400,000 yuan. At this time, the a1 value corresponding to the multiplexed network = (400,000 yuan-1536 households*150 yuan / household) / 1536 households=110 yuan / household. Thus, we get: Yf=XN(a1+a2)+bXn=1536 households (110 yuan / household+150 yuan / household)=400,000 yuan. That is, when the average household cost of the network front-end equipment provided in this example is a1=110 yuan and the average household cost of the ODN is a2=150, when the number of households reaches 65% of the number of households covered, the two will cross.

[0115] It can be seen that after the intersection, as the number of households continues to grow, the total investment cost of the PON network continues to grow, but the total cost of the network in this example does not grow with the number of households, which is the advantage of the multi-service multiplexing network. In a network without household costs, b=0 in the function Y=XN(a1+a2)+bXn, so the position of the intersection with the PON network curve is mainly determined by the average household cost a1 of the front-end equipment and the average household cost a2 of the ODN. The smaller the values ​​of a1 and a2, the smaller the Xn number corresponding to the intersection. We hope that the smaller the Xn number, the better. In addition, in the average household cost a1 of the front-end equipment and the average household cost a2 of the ODN in this example, the average household cost a2 of the ODN is three times the ODN cost of the PON network. Under the unified price of optical cables and ODF terminal boards, it is basically a constant. The per capita cost a1 of the front-end equipment is the only way to reduce the coverage cost. However, in this example, each user on the user side of the front-end equipment enjoys an exclusive gigabit optical port, which is different from the PON network front-end equipment where multiple users share one optical port. Therefore, the per capita cost of the front-end equipment of the network in this example cannot be close to the per capita cost of the PON network front-end equipment. Based on this, the per capita cost of the network front-end equipment in this example can be further controlled within three times the amount of the PON network front-end equipment. In the early stage, the intersection of the two networks is within 60% to 70% of the number of households in the model. With the large-scale application of new technologies, the per capita cost of the network front-end equipment can be further reduced, so that the number of households at the intersection is reduced to 50% of the number of households in the model. The advantage of this solution will be significantly enhanced.

[0116] Furthermore, the multi-service multiplexer of the local equipment in this example provides a high-density user interface on the user side to improve equipment efficiency and reduce the average cost per household. At the same time, a plug-in type model and a mother-and-child machine model are proposed. In actual deployment, the number of plug-ins and the number of child machines can be gradually increased according to the actual number of households connected, thereby better optimizing and reducing the system coverage cost and household access cost.

[0117] Furthermore, in this case, the main reason is that the ODN part is costly. The average household cost of the ODN part in this case (150 yuan) is three times the average household cost of the PON network ODN part (50 yuan), and 100 yuan higher than the PON network ODN. However, the 150 yuan in this case is the coverage cost, and its life cycle has a service life of at least 20 years. So although the initial investment is higher, this model cancels the home gateway and uses the ODN architecture of exclusive fiber to users in exchange for the investment cost of upgrading the home equipment of the PON network every few years. If the PON network home gateway is upgraded twice within the 20-year life cycle of the ODN part, the investment cost of the PON network within the 20-year operation cycle is much greater than the average household cost of the ODN part in this case.

[0118] For PON network, the per-household coverage cost of front-end equipment is its advantage. However, due to the need for upgrading every few years, the life cycle of its equipment on the network is much shorter than the life cycle of the equipment itself. Generally, it needs to be upgraded twice in ten years, or the splitting ratio is reduced and the central office equipment is added. This is mainly because multiple users on the user side of the PON network share the bandwidth of a PON port. Even if the bandwidth of a PON port has increased from 1000 to 10 ...

[0119] However, in the front-end equipment of the multi-service multiplexing network in this example, each user enjoys an exclusive physical interface bandwidth including but not limited to 1G / 10G (optional) speed, and does not need to be upgraded or expanded for a long period of time. Therefore, the life cycle of the front-end equipment of the network in this example is much longer than the life cycle of the equipment itself. Although the initial coverage cost is high, it still has huge advantages compared with the repeated investment in continuous upgrades and expansions of PON network equipment.

[0120] Furthermore, although the PON network has the advantage of multiple users accessing one PON port through shared optical fiber and splitting ODN to reduce the access network coverage cost, it is precisely because of this advantage that the transmission of upstream data in the PON network must adopt time division multiplexing technology, which leads to the user end being equipped with home gateway ONU equipment, and it has to be constantly upgraded to meet the user's increasing demand for service bandwidth, which leads to continuous upgrading and repeated investment. The multi-service multiplexing access network solution proposed in this example adopts each user's exclusive optical fiber access to the user-side optical port of the front-end multi-service multiplexer, thereby eliminating the complex time division multiplexing technology and home gateway in the PON network, and directly provides users with physical interfaces including but not limited to gigabit / 10G (optional) speeds. The access bandwidth that can be provided to users is greater than that of future 25G and 50GPON, but its cost will be much lower than that of future 25G and 50GPON. When the XGPON network is split at 1:128, the average downstream bandwidth per household is only 78Mbps. Even when it is upgraded to 1:64 splitting, the average downstream bandwidth per household is only 156Mbps. However, the multi-service multiplexer access network technology in this example has an average downlink bandwidth per household, including but not limited to 1000Mbps. In addition, the user in the multi-service multiplexer network has a unique feature of a central office interface, which can easily meet the requirements of higher bandwidth. Each user has a unique channel bandwidth, and its equipment can work at a relatively low rate, but can provide each user with a higher bandwidth.

[0121] Furthermore, because the PON network is usually a tree topology, once a problem occurs in one of the PON ports, the services of multiple users under the PON port will be interrupted, while each user in the multi-service multiplexer network has an independent port, and the failure of a port will not affect the services of other users. In addition, OLTs and ONUs / ONTs of different brands in the PON network are basically unable to be connected, while multi-service multiplexers use mature Ethernet protocols, and multi-service multiplexers of different brands can be easily connected to the CPN network at the user end.

[0122] The PON network adopts a point-to-point transmission mechanism. First, multiple ONUs under each PON port transmit data upward using a time division multiplexing mechanism. When one of the ONUs emits light in its own non-emitting time slot, other ONUs under the PON port will be affected. Second, the downstream data is transmitted in a broadcast mode, and an encryption mechanism is used to protect the data of each user. However, the multi-service multiplexing networking technology in this example adopts a point-to-point transmission mechanism. Each user has an exclusive access port, and each user is completely physically isolated. In the upstream direction of the PON system, each ONU must use the TDMA protocol to complete the access to the shared transmission channel information. Any change in the rate and frame structure will change the MAC layer protocol and the entire network equipment. However, in the multi-service multiplexing networking technology in this example, each user uses a specific independent channel when transmitting data up and down, which reduces the complexity of the system and improves the stability of the system operation.

[0123] At the service level, in order to make the network versatile and adapt to various value-added services, such as 4K / 8K, AR, Cloud VR, etc., QoS guarantee becomes the key. However, different users and their different services have different requirements for throughput, delay, delay deviation, bit error rate, etc., and it is impossible to make unified requirements for QoS. However, in this example, transmitting each user service through an independent channel helps to solve these problems. The unique multicast service processing mechanism can solve the problem of reserving 30% protection bandwidth when transmitting IPTV live services in the existing access network, so that the link utilization rate of the access network transmission system can be increased to 100% excluding its own overhead.

[0124] The above-mentioned Ethernet-based multi-service multiplexing exclusive fiber optic access network system is described below in conjunction with a specific embodiment. However, it is worth noting that the specific embodiment is only a schematic description and does not constitute an improper limitation of the present application. Each multi-service multiplexer in the Ethernet-based multi-service multiplexing exclusive fiber optic access network system can be composed of a secondary multiplexing and demultiplexing unit, a multicast service relay unit and M primary multiplexing and demultiplexing units. The number of primary multiplexing and demultiplexing units M includes but is not limited to 4, 6, and 8; the primary multiplexing and demultiplexing module of each primary multiplexing and demultiplexing unit can provide m Gigabit / 10 Gigabit optional rate user interfaces on the user side, and the number of user interfaces m can include but is not limited to 48, 64, and 96; each primary multiplexing and demultiplexing module can be equipped with W multi-channel integrated optoelectronic conversion and transceiver devices to realize primary multiplexing and demultiplexing. The multiplexing module user interface performs electrical-to-optical and optical-to-electrical conversion of electrical signals. The number of multi-channel integrated optoelectronic conversion transceiver devices W may include but is not limited to 4, 6, or 8; each multi-channel integrated optoelectronic conversion transceiver integrates L optoelectronic conversion channels, and the optical pigtails led out of the L optoelectronic conversion transceiver devices are aggregated into multi-core optical pigtails. Further, the multi-core optical pigtails are adapted to the multi-core optical pigtail adapter female to form a multi-channel integrated optoelectronic conversion transceiver; the number of channels L may include but is not limited to 12, 16, or 24, and each multi-service multiplexer may provide N=M*W multi-core optical pigtail adapter interfaces.

[0125] That is, the number M of interfaces between the first-level multiplexing and demultiplexing module and the second-level multiplexing and demultiplexing device may include but is not limited to 4, 6, or 8; the number m of user-side interfaces of each first-level multiplexing and demultiplexing module may include but is not limited to 48, 64, or 96; the number of multi-channel optoelectronic converters or the number of multi-core fiber pigtails W may include but is not limited to 4, 6, or 8; the number of optoelectronic converter channels or the number of cores L of multi-core fiber pigtails may include but is not limited to 12, 16, or 24; the number N of multi-core fiber pigtail adapters equipped with each multi-service multiplexer may include but is not limited to M*W; thus, the various combinations of the number of access households for each multi-service multiplexer n=M*W*L=M*m=N*L may include but are not limited to 192, 256, 384, 512, and 768 users, thereby greatly improving equipment efficiency and effectively reducing access network coverage costs and household access costs.

[0126] Furthermore, for the multi-service multiplexer, a plug-in type and a mother-and-child type are proposed. In actual deployment, the number of plug-ins and the number of child devices can be gradually increased according to the actual number of households, thereby optimizing and reducing the system coverage cost and household access cost. Furthermore, regardless of whether the multi-service multiplexer adopts an integrated type, a plug-in type, or a split type implementation plan, the core network side interface, the bus or interface between the secondary multiplexing and demultiplexing unit and the primary multiplexing and demultiplexing unit, and the user side interface of the primary multiplexing and demultiplexing unit, the number and specifications of the interfaces shall include but are not limited to the following requirements:

[0127] 1) The core network side of the secondary multiplexing and demultiplexing unit is equipped with, including but not limited to, multiple interfaces at 10G / 25G / 100G (optional) rates and independent 10G / 25G (optional) rate multicast service interfaces;

[0128] 2) The data bus or interface between the secondary multiplexing and demultiplexing unit and the primary multiplexing and demultiplexing unit shall be equipped with multiple rate interfaces including but not limited to 10G / 25G (optional);

[0129] 3) The user-side interface of the first-level multiplexing and demultiplexing unit should be equipped with 48, 64, 96, including but not limited to 1 Gigabit / 10 Gigabit (optional) rate interfaces.

[0130] The models of the central office equipment multi-service multiplexer can be divided into three types: integrated model, plug-in model and split model. The following is an introduction to these three models:

[0131] 1) Integrated model:

[0132] The principle block diagram of the integrated model of the multi-service multiplexer can be shown as follows Figure 6 As shown in the figure, the integrated model implementation scheme is different from the plug-in type and split type in that the service side interface, user side interface, secondary multiplexing and demultiplexing unit and primary multiplexing and demultiplexing unit of the multi-service multiplexer are all integrated in one chassis, and the integration is higher than the other two implementation schemes. In the integrated model, the user side interface can generally be selected in specifications such as 192, 256, 384, 512, 768, etc. The uplink port can be the same as the plug-in type and split type.

[0133] like Figure 6As shown, the multi-service multiplexer can be composed of a secondary multiplexing and demultiplexing unit 15, a main and standby power supply unit 22, a multicast service unit 23 and a primary multiplexing and demultiplexing unit 28. The service side of the multi-service multiplexer can provide a core network data service interface 3 including but not limited to 10G / 25G / 100G (optional) rate, and a core network multicast service interface 4 with a transmission rate including but not limited to 10G / 25G (optional) rate is independently set on the service side. The data service interface and multicast service interface on the service side of the multi-service multiplexer have the access network service function node SNI function; the network management interface 2 has the access network management node Q node function; the user side of the multi-service multiplexer provides including but not limited to Gigabit / 10 Gigabit (optional) rate optical interfaces, and has the access network user node UNI function.

[0134] The user side of the multi-service multiplexer provides optical interfaces that may include but are not limited to Gigabit / 10 Gigabit (optional) speeds. Without the need for an access gateway at home, users can access home routers through optoelectronic converters, or directly access home fiber optic routers, and access other indoor application terminals through fiber optic routers, thereby achieving full service access including data services, communication services, broadband Internet services, cable TV live broadcast services, and IPTV services.

[0135] Compared with plug-in type and split type, the integrated multi-service multiplexer is the most integrated solution with the lowest space occupancy in the access network chassis. Compared with plug-in type and split type, it has fewer interfaces between devices and runs more stably. However, when the household penetration rate of the integrated multi-service multiplexer is not high, the coverage cost control is weaker than that of the plug-in type and split type.

[0136] 2) Plug-in type:

[0137] The principle block diagram of the plug-in multi-service multiplexer can be shown as follows: Fig.11 As shown in the figure, the central intention of the plug-in type implementation plan of the multi-service multiplexer is to configure the backplane and insert the main board, multiple function boards and sub-boards in one frame. In the plug-in type, the main board is composed of a secondary multiplexing and demultiplexing unit, the main and standby power supply units and the multicast service relay forwarding board are independent function boards, and the primary multiplexing and demultiplexing unit is made into a plug-in sub-board. The sub-board can be configured with a variety of user-side interfaces such as 48 or 96 ports, and is connected to the main board through the plug-in interface to form a complete multi-service multiplexer.

[0138] right Figure 6 and Fig.11 By comparison, it can be seen that compared with the integrated model, the plug-in type has an additional backplane and a daughterboard 41 with a plug-in interface 40. In other functional units of the main board and daughterboard, the functional modules and interface definitions and specifications are the same as those of the integrated model.

[0139] For the plug-in solution, the sub-board can be equipped according to the actual number of access users, thereby reducing the coverage cost of the access network central office equipment. However, the plug-in interface between the main board and the sub-board has high requirements for circuit design, and the cost is relatively higher than the stand-alone solution.

[0140] 3) Split type:

[0141] The principle block diagram of the split-type multi-service multiplexer can be shown as follows Fig.12 As shown, the split type can also be called a master-slave implementation scheme, which is an implementation scheme in which a host and multiple 48 user interface sub-machines form a group of 48 to 384 user interfaces. Fig.12 It can be seen that the left part is a principle block diagram of the host, including: a secondary multiplexing and demultiplexing unit 15, a main and standby power supply unit 22, a multicast service unit 23, and a data service interface 42 on the user side of the host for accessing the sub-machine and a multicast service interface 44 on the user side of the host. The service side of the host can be equipped with a 10G / 25G / 100G (optional) rate data service interface and an independent 10G / 25G (optional) rate multicast service interface to connect to the core network, and an all-optical port multicast service relay forwarding module 43 is provided in the multicast service unit 23. The right side is a principle block diagram of the sub-machine 45, including: a primary multiplexing module 29, a high-speed data interface for the secondary multiplexing and demultiplexing unit (a data service interface 46 on the service side of the sub-machine and a multicast service interface 47 on the service side of the sub-machine), a user-side data interface 30, a multi-channel integrated optoelectronic conversion transceiver 31, a multi-core pigtail 32 in the box, and a multi-core pigtail adapter 5. Multiple 10G / 25G (optional) rate interfaces can be configured between the host and slave to enable access to multiple slaves.

[0142] exist Fig.12 In the illustrated parent-child mode, the host user side interface is the data service interface 42 on the host user side and the multicast service interface 44 on the host user side, which can be 4+4, 8+8, or 12+12 port specifications, i.e., data service interface*4+multicast service interface*4, data service interface*8+multicast service interface*8, and data service interface*12+multicast service interface*12, so that one host can access 4, 8, or 12 sub-machines. The sub-machine service side interface is the data service interface 46 on the sub-machine service side and the multicast service interface 47 on the sub-machine service side, and its purpose is to adapt to the independent channel access of data service and multicast service to the primary multiplexing and demultiplexing unit of the sub-machine.

[0143] In the implementation plan of the parent-child mode, the child machine can be equipped according to the increase in the number of actual access users, thereby reducing the coverage cost of the access network central office equipment in the initial stage of network construction. The host and the child machine can also form a combination of a tree-structured network and a comb-structured network, which greatly reduces the cost of optical fiber resources in environments such as multi-family residential areas and office buildings. However, the host and the child machine need to be designed according to the 1U19-inch chassis, which is larger in size and will result in higher costs than the integrated structure and plug-in structure.

[0144] In this example, because it is an exclusive fiber broadband access system, it needs to meet the access needs of various users including home users, enterprises, schools, office networks and other private networks. Currently, operators must have the transmission capabilities of broadband Internet data services, communication services and video services. Therefore, in this example, the exclusive fiber broadband access system is accessed through single-fiber dual-wave mode.

[0145] The system principle of the above single-fiber dual-wave home access mode can be as follows: Figure 5 As shown, the single-fiber dual-wavelength networking mode of this example is basically similar to the single-fiber dual-wavelength network of existing communication operators. The uplink and downlink services of the communication services, Internet data services and IPTV multicast services accessed by each user are transmitted on a single optical fiber using uplink wavelengths and downlink wavelengths of different wavelengths, respectively. This is called a single-fiber dual-wavelength transmission mode. However, the single-fiber dual-wavelength in this example is different from the existing single-fiber dual-wavelength access network. In this example, the multi-service multiplexer 1 of the local equipment not only has data service interfaces for communication services, data services and broadband Internet services, but also independently sets up multicast service interfaces and multicast service relay function modules. In the single-fiber dual-wavelength network mode of the communication operator, the multicast replication point of the IPTV live broadcast service is moved down to the multi-service multiplexer closest to the user and to the first-level multiplexing and demultiplexing module with the smallest number of access users. This greatly reduces the investment cost of the core network multicast replication equipment and, in the communication operator network mode, greatly improves the transmission quality of the broadcast and television live broadcast service, enables the transmission quality of the broadcast and television service to reach the broadcast-level transmission standard, and reduces the packet loss rate index of the IPTV multicast service from the current 10 -4 Increase to 10 -6 .

[0146] In this example, the user-side interface of the first-level multiplexing and demultiplexing module in the multi-service multiplexer reaches at least, including but not limited to 48, 64 and 96 Gigabit / 10 Gigabit rate interfaces. These high-density interfaces are eventually converted into optical interfaces and connected to a single optical fiber for each user in the access network. Therefore, a large number of optoelectronic conversion transceiver devices BOSA and a large number of pigtail adapters need to be integrated in the device. In order to meet the arrangement of this high-density BOSA and the adaptation of multi-channel pigtails, in this example, a multi-channel integrated optoelectronic conversion transceiver and a multi-core pigtail adapter are proposed, so as to accommodate the welding of more BOSAs on a limited circuit board. The number of channels of the multi-channel integrated optoelectronic conversion transceiver can be various specifications including but not limited to 1 times 12 channels, 2 times 12 channels and 1 times 24 channels, and at the same time combined with multi-core pigtails and multi-core pigtail adapters, the number of cores of the multi-core pigtails and multi-core pigtail adapters includes but is not limited to 12 cores, 24 cores, 32 cores, and 48 cores, so as to adapt more optical fiber interfaces on a limited chassis panel, so that the number of user-side optical interfaces of the multi-service multiplexer composed of multiple first-level multiplexing modules reaches but is not limited to 192, 256, 384, 512, and 768, so as to achieve the purpose of high interface density and low coverage cost of access network local equipment.

[0147] In this example, the Ethernet protocol standardization technology is adopted, and the support of time division multiplexing technology and high-speed chips in the PON technology access network is cancelled. The equipment is easy to use, the bandwidth allocation is more flexible, and the operation is stable and reliable. Compared with the existing PON network, the OLT and ONU of different brands can basically not be connected, the access network based on Ethernet technology in this example has a mature standard protocol, and the central offices of different brands can achieve relatively perfect connection. Furthermore, the Ethernet technology-based exclusive optical fiber multi-service multiplexing broadband access network system fully meets the access network interface definition and function definition, and can also meet the requirements of multiple types of access network services, low traffic density, high interface density, low coverage cost and low home access cost. In addition, the access network user-side functional interface UNI point is moved up to the access network central office. Compared with the existing PON network, there is no gateway device belonging to the operator's assets on the user side. The access network central office and the user-side CPN network are only connected through the operator's passive optical fiber. The CPN network owned by the user is connected to the access network central office device interface through each user's exclusive optical fiber, truly realizing the passivity of the access network, and the property rights of users and operators are clear.

[0148] In the Ethernet-based exclusive fiber-optic multi-service multiplexing broadband access network system, the integrated model, plug-in model, and mother-and-child model, as well as the flexible configuration of the user-side Gigabit / 10 Gigabit interface, are not only suitable for residential areas, but also for flexible access and flexible allocation of bandwidth requirements in different environments such as park environments, government agencies and groups. Compared with the existing PON network, the Ethernet-based exclusive fiber-optic broadband access system in this example has the following advantages: more optical ports on the user side of the central office equipment, one optical port for each user; more optical cable cores from the central office box to the unit box, each user has a dedicated optical fiber; there are fewer ONUs in the user's home, and each user has a dedicated optical fiber to replace the PON network home ONU equipment; the user access bandwidth is large: including but not limited to 1000M, and the average cost per household is low.

[0149] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the hardware + program embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0150] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0151] Although the present application provides method operation steps as described in the embodiments or flowcharts, more or fewer operation steps may be included based on conventional or non-creative labor. The order of steps listed in the embodiments is only one way of executing the order of many steps and does not represent the only execution order. When the actual device or client product is executed, it can be executed in the order of the method shown in the embodiments or the drawings or in parallel (for example, in a parallel processor or multi-threaded processing environment).

[0152] For the convenience of description, the above devices are described in various modules according to their functions. Of course, when implementing the embodiments of this specification, the functions of each module can be implemented in the same or more software and / or hardware, or the module implementing the same function can be implemented by a combination of multiple sub-modules or sub-units. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods 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. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0153] Those skilled in the art also know that, in addition to implementing the controller in a purely computer-readable program code, the controller can be made to implement the same function in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, such a controller can be considered as a hardware component, and the devices for implementing various functions included therein can also be considered as structures within the hardware component. Or even, the devices for implementing various functions can be considered as both software modules for implementing the method and structures within the hardware component.

[0154] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0155] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0156] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0157] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0158] The memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0159] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0160] Those skilled in the art will appreciate that the embodiments of this specification may be provided as methods, systems or computer program products. Therefore, the embodiments of this specification may take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware. Moreover, the embodiments of this specification may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0161] The present specification embodiments may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present specification embodiments may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer storage media, including storage devices.

[0162] Each embodiment in this 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 focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. In the description of this specification, the description of the reference 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 embodiment of this specification. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, in the absence of mutual contradiction, a person skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0163] The above is only an example of the embodiment of the present specification and is not intended to limit the embodiment of the present specification. For those skilled in the art, the embodiment of the present specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiment of the present specification shall be included in the scope of the claims of the embodiment of the present specification.

Claims

1. A multi-service multiplexing exclusive optical fiber access network system based on Ethernet technology, characterized in that: include: The central office equipment includes a multi-service multiplexer, a terminal board for connecting optical cables in the central office cabinet, a multi-core optical cable from the central office cabinet to the corridor cabinet, a terminal board in the corridor cabinet, and an optical fiber for entering the home, including: The core network side of the central office equipment multi-service multiplexer is provided with a communication service interface, a broadband Internet service interface, a data service interface and a multicast service interface; The user side of the central office equipment multi-service multiplexer is connected to the multi-core optical cable from the central office box to the corridor box through a multi-core pigtail adapter, a multi-core pigtail and an optical fiber terminal board in the central office box; Each core of the multi-core optical cable from the central office box to the corridor box is connected to the incoming optical fiber of each fiber-to-the-home user through the terminal board in the corridor box, so that each fiber-to-the-home user can access multiple services by using a single core of optical fiber to access the multi-service multiplexer of the central office equipment; The central office equipment multi-service multiplexer comprises: a secondary multiplexing and demultiplexing unit, a multicast service unit, a primary and secondary power supply unit, and M primary multiplexing and demultiplexing units, where M is a positive integer; Each primary multiplexing and demultiplexing unit is provided with a 10G or 25G data service interface connected to the secondary multiplexing and demultiplexing unit, and is connected to one of the M data service interfaces provided by the secondary multiplexing and demultiplexing unit through the 10G or 25G data service interface to realize the access, cross-connection, multiplexing and transmission functions of communication services, broadband Internet services and data services; Each primary multiplexing and demultiplexing unit is also provided with a 10G or 25G multicast service interface connected to the multicast service unit, and is connected to one of the M multicast service interfaces provided by the multicast service unit through the 10G or 25G multicast service interface, so as to forward the content requested by the user to listen or watch to the user through the multicast to unicast mechanism; The first-level multiplexing and demultiplexing unit is provided with a user interface with a selectable rate of Gigabit or 10 Gigabit and the function of the access network user function node UNI, and is converted into a multi-channel optical interface through a multi-channel integrated optoelectronic conversion transceiver on the user side, and then the pigtail of the multi-channel optical interface is adapted into a multi-core pigtail, and then connected to the multi-core pigtail adapter, and each pigtail of the multi-core pigtail adapted by the multi-core pigtail adapter is connected to a single-core optical fiber exclusively used by each user of the access network, so that each user has an exclusive single-core optical fiber access to the user-side interface of the multi-service multiplexer of the central office equipment.

2. The Ethernet-based multi-service multiplexing exclusive optical fiber access network system according to claim 1, characterized in that: The secondary multiplexing and demultiplexing unit includes: a service side core network data service interface, a secondary multiplexing and demultiplexing module, a network management interface, a network management module, a main control CPU module, a storage module, an I / O management CPU module, and M data service interfaces that can be connected to M primary multiplexing and demultiplexing units; The multicast service unit includes: a core network side multicast service interface, a multicast service relay module and M multicast service interfaces that can access M primary multiplexing and demultiplexing units; The main and standby power supply unit comprises: a main and standby power supply module and a main and standby power supply management module; The first-level multiplexing and demultiplexing unit includes: a data service interface and a multicast service interface that can be connected to the second-level multiplexing and demultiplexing unit and the multicast service relay module, a first-level multiplexing and demultiplexing module, W user-side multi-channel integrated optoelectronic conversion transceiver devices, multi-core pigtails and multi-core pigtail adapters, where W is a positive integer.

3. The Ethernet-based multi-service multiplexing exclusive optical fiber access network system according to claim 2, characterized in that: The core network side of the secondary multiplexing and demultiplexing unit is provided with a multi-rate service function interface with an access network SNI function node to meet the connection requirements with the core network, wherein the multi-rate includes the following: 10G, 25G and 100G; The secondary multiplexing and demultiplexing unit includes: an optional rate data service interface for accessing M primary multiplexing units to meet the access requirements of the M primary multiplexing and demultiplexing units, wherein the optional rates include: 10G and 25G.

4. The Ethernet-based multi-service multiplexing exclusive optical fiber access network system according to claim 3, characterized in that: The number of user interfaces set in each first-level multiplexing and demultiplexing unit is m, and the value of m is one of the following: 48, 64, 96, and it is converted into multi-channel optical interfaces through W multi-channel integrated optoelectronic conversion and receiving devices, and the value of W is one of the following: 4, 6, 8, where m and W are positive integers.

5. The Ethernet-based multi-service multiplexing exclusive optical fiber access network system according to claim 4, characterized in that: The user-side multi-channel integrated optoelectronic conversion transceiver device of the primary multiplexing and demultiplexing unit includes: a multi-grid integrated optical transceiver core installation base, a pigtail fiber compartment, a multi-core pigtail lead-out hole, a multi-core pigtail and a multi-core pigtail adapter female head, wherein: An integrated base with L grids is provided in each multi-channel integrated optoelectronic conversion and transceiver device. In each grid, an optoelectronic conversion tube core with 1 receiving and 1 transmitting, a preamplifier circuit, a combiner / splitter wave plate, a pigtail adapter and a single-core pigtail led out of the pigtail adapter are installed respectively. The single-core pigtail led out of the combiner / splitter wave plate in each grid is orderly coiled in a fiber coiling cabin at the rear end of the L grid integrated base, and then converged into a multi-core pigtail with L cores. The multi-core pigtail with L cores is fixed in the fiber coiling cabin for tensile resistance, and then led out through the lead-out hole of the fiber coiling cabin. After the led-out multi-core pigtail reserves a preset length, it is connected to the multi-core pigtail adapter female head, wherein L is a positive integer, and the value of L is one of the following: 12, 16, 24.

6. The Ethernet-based multi-service multiplexing exclusive optical fiber access network system according to claim 1, characterized in that: Also includes: Home-end equipment, the home-end equipment comprises: an optical-to-electrical converter and a home electrical-port router, wherein: The photoelectric converter includes: an optical module, a transceiver module, a network port adapter and an RJ45 interface, wherein the optical module is connected to the home optical fiber, and the RJ45 interface is connected to the home electrical port router.

7. The Ethernet-based multi-service multiplexing exclusive optical fiber access network system according to claim 1, characterized in that: Also includes: The home-end device comprises: a home fiber optic router, the home fiber optic router directly uses the optical port as the WAN port, the optical port rate is gigabit, the home fiber optic router comprises: an optical module, a transceiver module, a network port adapter, an RJ45 interface, a routing module, a WiFi module, and a USB interface, wherein the optical module is connected to the home optical fiber, and is connected to the home application terminal through the WiFi module and the RJ45 interface to provide access to broadband Internet services, data communication services, and IPTV multicast services.

8. The Ethernet-based multi-service multiplexing exclusive optical fiber access network system according to claim 1, characterized in that: Also includes: Multiple fiber-to-the-home users, where fiber-to-the-home users are connected in a single-fiber dual-wavelength home access mode, where: The single-fiber dual-wavelength home-entry mode includes: one core home-entry optical fiber, utilizing the multi-service multiplexing function and forwarding function of the multi-service multiplexer of the central office equipment, using one downstream wavelength and one upstream wavelength on the single core home-entry optical fiber to transmit the communication services, broadband Internet services and cable TV services required by users.

9. The Ethernet-based multi-service multiplexing exclusive optical fiber access network system according to any one of claims 1 to 8, characterized in that: The service side of the multi-service multiplexer of the central office equipment provides data service interfaces for communication services and broadband Internet, and independently sets up multicast service interfaces to improve the transmission quality of multicast services and the efficiency of access network links; the user side of the multi-service multiplexer of the central office equipment provides each user with an optical interface with an optional rate of 1 Gigabit or 10 Gigabit, and through multiple multi-core pigtails, the multi-core optical cable from the central office box to the corridor box and the access optical fiber, each user can access the user-side interface of the multi-service multiplexer of the central office equipment through a single-core optical fiber from the central office to the user, so that each user can exclusively enjoy the interface resources of one user side of the multi-service multiplexer of the central office equipment to form a point-to-point star structure access network.

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