CN201467347U - Wideband access system based on coaxial network - Google Patents
Wideband access system based on coaxial network Download PDFInfo
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- CN201467347U CN201467347U CN2009200826923U CN200920082692U CN201467347U CN 201467347 U CN201467347 U CN 201467347U CN 2009200826923 U CN2009200826923 U CN 2009200826923U CN 200920082692 U CN200920082692 U CN 200920082692U CN 201467347 U CN201467347 U CN 201467347U
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Abstract
The utility model discloses a wideband access system based on a coaxial network. The wideband access system comprises an HFC light transmission network and an HFC coaxial distribution network, wherein the HFC light transmission network comprises an optical fiber circuit terminator positioned in a central machine room, the optical fiber circuit terminator is connected to all optical fiber network units through a multi-stage passive optical splitter, the HFC coaxial distribution network comprises an Ethernet coaxial termination box positioned in the home of a user and an Ethernet coaxial network bridge connected with the Ethernet coaxial termination box and the optical fiber network units, the Ethernet coaxial network bridge comprises a 10/100 M Ethernet interface, a coaxial cable input interface and a coaxial cable output interface, the HFC bilateral network system can provide Internet access, video on demand, common telephone usage, interactive television and other services without changing the prior CATV layout and wiring, at the same time, the transmission of the original cable television system is not affected, thereby having higher security and reliability.
Description
Technical field
The utility model relates to networking technology area, especially a kind of broadband access system based on coaxial network.
Background technology
In existing multiple broad band access method, ADSL access technology based on the telephone net user line, with existing ordinary telephone line is transmission medium, can be at ordinary telephone line, be the high-speed downstream speed that provides on the copper twisted pair cable up to 8Mbit/s, upstream rate can reach 1Mbit/s, and transmission range then reaches 3000m-5000m.Can coexist as on the telephone wire with plain old telephone, make online and answer, call and be independent of each other.The scope of application: city telephone subscriber group, or the intensive relatively sub-district of population or office building, commercial building, transmission range is in 5 kilometers.
Fast Ethernet inserts owing to seamless combination and outstanding scalability with IP network possess a lot of inherent advantages, but the construction of Ethernet needs shop line separately, and initial investment is big, the construction trouble; It is limited that 10/100m Ethernet category-5 cable inserts transmission range, access switch One's name is legion, scattered, and network management and maintenance are complicated, and circuit is safety inadequately.
Fixed wireless access mode LMDS is an a kind of microwave broadband system, it is operated in the high-end 20GHz-40GHz of microwave frequency, networking flexibility is convenient, use cost is low, but the capital construction expense is huge, and 1mds provides professional by several cellular service areas, each service area needs to set up a base station at least, fixing or mobile subscriber's far-end inserts backbone network by the base station, when scale management, needs to build a large amount of base stations; When the user was fewer, cost can't reduce.
Optical fiber connecting method among this mode optical fiber direct user man, generally only needs one to two subscribers feeder, is long-range developing direction and final Access Network solution.In the present practical application, part realizes that fiberize, optical fiber only arrive the Service Access point (SAP) in roadside.By optical network unit (ONU), finish functions such as light/electricity conversion and tap at this place, insert in the user family in several ways then.
The utility model content
The purpose of this utility model provides a kind of existing resources equipment that utilizes fully, and the broadband access system based on coaxial network of high bandwidth, low cost, easy expansion, easy care is provided.
Broadband access system based on coaxial network of the present utility model is achieved by following technical proposals:
Broadband access system based on coaxial network, comprise the coaxial distribution network of HFC optical transport network and HFC, described HFC optical transport network comprises the optical line terminal device that is positioned at central machine room, the optical line terminal device is a switch or router, be again that a multi-service provides platform, it provides the optical fiber interface towards passive optical-fiber network, this optical line terminal device is connected to each optical network unit by several grades of passive optical splitters, and each passive optical splitters distribution downlink data is also concentrated upstream data.Optical network unit is placed near the network interface unit or with it and is integrated, and finishes functions such as opto-electronic conversion and tap, inserts in the user family in several ways then.
The coaxial distribution network of described HFC comprises the Ethernet coaxial termination box that is arranged in user house, also comprise the coaxial bridge of Ethernet that connects Ethernet coaxial termination box and optical network unit, the coaxial bridge of this Ethernet comprises 1 10/100M Ethernet interface, 1 coaxial cable input interface and 1 coaxial cable output interface. the coaxial bridge of Ethernet is as the coaxial distribution network local side apparatus of HFC, in network, having the place that IP inserts. the distance between local side apparatus and the building can be very short, as the basement in the building or very long as hundreds of rice or longer, being placed in the open-air airtight box. the rf inputs of local side apparatus and HFC are used for transportation simulator or Digital Television, the output cable of the network equipment links to each other, pass through optical transmission device simultaneously, network interface as EPON etc. is received IP network, will output to the coax network that leads to the user after the data signal modulation with behind CATV signal and the ripple.
Broadband access system based on coaxial network of the present utility model compared with prior art has following good effect:
This broadband access system based on coaxial network can not need to change existing CATV place and route, can provide the internet to insert, video request program, use plain old telephone, services such as interactive television, can not influence simultaneously the transmission of original cable television system, have higher fail safe and reliability.
Description of drawings
The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is based on the schematic diagram of the broadband access system of coaxial network.
Embodiment
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
Present embodiment based on the broadband access system of coaxial network with reference to accompanying drawing, comprise the coaxial distribution network of HFC optical transport network and HFC, the HFC optical transport network comprises the optical line terminal device that is positioned at central machine room, the optical line terminal device is a switch or router, be again that a multi-service provides platform, it provides the optical fiber interface towards passive optical-fiber network, this optical line terminal device is connected to each optical network unit by several grades of passive optical splitters, and each passive optical splitters distribution downlink data is also concentrated upstream data.Optical network unit is placed near the network interface unit, finishes functions such as opto-electronic conversion and tap.
The coaxial distribution network of HFC comprises the Ethernet coaxial termination box that is arranged in user house, also comprise the coaxial bridge of Ethernet that connects Ethernet coaxial termination box and optical network unit, the coaxial bridge of this Ethernet comprises 1 10/100M Ethernet interface, 1 coaxial cable input interface and 1 coaxial cable output interface.The coaxial bridge of local side apparatus Ethernet is installed in the building building.The rf inputs of local side apparatus and HFC are used for transportation simulator or Digital Television, the output cable of the network equipment links to each other, by optical transmission device, the network interface of EPON is received IP network, will output to the coax network that leads to the user after the data signal modulation with behind CATV signal and the ripple simultaneously.
By adopting EoC access network technical solution based on Homeplug BPL (IEEE1901) standard, in project implementing process, need not network topology is transformed, save the trunk fiber resource, make full use of the optical fiber and the coaxial cable resource of hfc plant, in system, only need increase the access point of the coaxial bridge of EOC local side apparatus Ethernet, will send into again in the coaxial distribution network of HFC behind the data modulated signal of the cable TV signal of optical receiver and the coaxial bridge of Ethernet and the ripple at the optical node place as data.HomePlug BPL technology, with the signal of Ethernet OFDM modulation system, frequency range is at 2MHz～30MHz, the Independent Carrier Wave number is 7 * 128, physical layer bandwidth 224Mbps, IP layer shared bandwidth 60Mbps, and can be compatible fully with frequency range 87MHz～860MHz that cable television system is used.At the port of user side HFC coaxial network access network based on ethernet coaxial termination box, terminal box will separate with the signal of ripple, after being separated, cable TV signal inserts set-top box or other TV receiving apparatus, guarantee that the broadcast television signal that CHINA RFTCOM Co Ltd provides can be by complete transmission, the data modulated signal of separating is reduced to the Ethernet data signal through after the demodulation in terminal box, thereby realize the transmission of data in coaxial network, an EOC local side can be with 64 terminal boxes in system, can satisfy the capacity requirement at each 500 family, optical node station in the existing hfc plant substantially, guarantee each user's bandwidth requirement simultaneously.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (1)
1. based on the broadband access system of coaxial network, comprise the coaxial distribution network of HFC optical transport network and HFC, described HFC optical transport network comprises the optical line terminal device that is positioned at central machine room, this optical line terminal device is connected to each optical network unit by several grades of passive optical splitters, the coaxial distribution network of described HFC comprises the Ethernet coaxial termination box that is arranged in user house, it is characterized in that: also comprise the coaxial bridge of Ethernet that connects Ethernet coaxial termination box and optical network unit, the coaxial bridge of this Ethernet comprises 1 10/100M Ethernet interface, 1 coaxial cable input interface and 1 coaxial cable output interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200826923U CN201467347U (en) | 2009-07-17 | 2009-07-17 | Wideband access system based on coaxial network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200826923U CN201467347U (en) | 2009-07-17 | 2009-07-17 | Wideband access system based on coaxial network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201467347U true CN201467347U (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200826923U Expired - Fee Related CN201467347U (en) | 2009-07-17 | 2009-07-17 | Wideband access system based on coaxial network |
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| CN (1) | CN201467347U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410844A (en) * | 2014-10-30 | 2015-03-11 | 成都康特电子高新科技有限责任公司 | Multifunctional HFC system based on radio and TV network |
-
2009
- 2009-07-17 CN CN2009200826923U patent/CN201467347U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410844A (en) * | 2014-10-30 | 2015-03-11 | 成都康特电子高新科技有限责任公司 | Multifunctional HFC system based on radio and TV network |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20170717 |
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| CF01 | Termination of patent right due to non-payment of annual fee |