CN100397891C - Method for solving convergence interference using multi-nierarchy structure - Google Patents
Method for solving convergence interference using multi-nierarchy structure Download PDFInfo
- Publication number
- CN100397891C CN100397891C CNB2003101108072A CN200310110807A CN100397891C CN 100397891 C CN100397891 C CN 100397891C CN B2003101108072 A CNB2003101108072 A CN B2003101108072A CN 200310110807 A CN200310110807 A CN 200310110807A CN 100397891 C CN100397891 C CN 100397891C
- Authority
- CN
- China
- Prior art keywords
- coaxial cable
- links
- access server
- coaxial
- optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The present invention relates to a method for solving the problem of convergence interference by using a multi-layered architecture. In a network formed by connecting an optical transceiver, a concentric cable, an amplifier, a branching unit, a distributor, and a coaxial cable socket, an optical node access server is added; an optical fiber interface of the optical transceiver is connected with a front end system through an optical fiber; a concentric cable interface is connected with the optical node access server through the concentric cable; the optical node access server is connected with the amplifier, the branching unit or the distributor; the amplifier is connected with the branching unit or the optical node access server; the branching unit is connected with the branching unit, the distributor, the amplifier, the optical node access server or the coaxial cable socket; the distributor is connected with the coaxial cable socket; in this way, a hybrid fiber coaxial (HFC) network with the multi-layered architecture is formed. The present invention can realize reliable information feedback; besides, the present invention solves the problem of convergence interference and enhances the anti-interference capability of the HFC network.
Description
Affiliated technical field: the invention belongs to the transmission field of wired broadcasting TV, specifically is that a kind of multi-layer framework that adopts solves the method that converges interference.
Background technology:
HFC (hybred fiber-coax) network is adopted in the transmission of wired broadcasting TV usually.Typical hfc plant topological structure is made up of the standardized product in the hfc plants such as optical transceiver, amplifier, splitter, distributor and coaxial socket, uses coaxial cable to interconnect between these equipment.Optical transceiver possesses optical fiber interface and a plurality of coaxial cable interface, is responsible for the mutual conversion between the light signal and the signal of telecommunication.Amplifier amplifies the signal of telecommunication that coaxial cable transmits.Splitter and/or distributor can perhaps be mixed into single channel with multi-channel electric signal with single channel signal of telecommunication demultiplexing.This network configuration is fit to the transmission of unidirectional downlink broadcast TV signal, but when it is used for upward signal or return path signal transmission, will run into the problem that converges interference.
It is as follows to converge cause of interference:
Upward signal or return path signal that the terminal use sends insert hfc plant by coaxial socket, when the user side coaxial socket shields when bad electromagnetic signal, the various interference signals that end user location miscellaneous equipment (television set, microwave oven, hair dryer etc.) produces will enter hfc plant by the user side coaxial socket.The coaxial socket of each user side all may be introduced interference signal in the hfc plant, and these interference signals are mixed at the optical transceiver place at last, superposeed by the upwards transmission of coaxial cable, amplifier, splitter and/or distributor, form the very strong interference of converging.Useful return path signal and converge interference signal and send front end system from optical transceiver to by optical fiber simultaneously, when converging interference intensity when being far longer than return path signal or upward signal, the equipment of front end system can't recover return path signal or upward signal from converge interference.
The object of the present invention is to provide a kind of multi-layer framework that adopts to solve the method that converges interference, realize reliable information passback, solve and converge interference problem, improve the antijamming capability of hfc plant.
Summary of the invention:
The objective of the invention is to realize by following technical proposals:
It is as follows that employing multi-layer framework of the present invention solves the method that converges interference: in the network that is formed by connecting by optical transceiver (2), coaxial cable (3), amplifier (4), splitter (5), distributor (6), coaxial socket (7), add optical node access server (8), wherein, optical fiber interface in the optical transceiver (2) links to each other with front end system by optical fiber (1), and coaxial cable interface links to each other with optical node access server (8) by coaxial cable (3); Optical node access server (8) links to each other by coaxial cable (3) and amplifier (4) or splitter (5) or distributor (6); Amplifier (4) links to each other with splitter (5) or optical node access server (8) by coaxial cable (3); Splitter (5) links to each other by coaxial cable (3) and splitter (5) or distributor (6) or amplifier (4) or optical node access server (8) or coaxial socket (7); Distributor (6) links to each other with coaxial socket (7) by coaxial cable (3); Thereby constitute the Hybrid Fiber Coaxial of multi-layer framework.
In the such scheme, optical node access server (8) is made up of optical fiber switch plate (a), high speed modem (b.1, b.2, b.3) and simulation channel-splitting filter plate (e), a port of optical fiber switch plate (a) links to each other with optical fiber, optical fiber switch plate (a) is interconnected by the RJ45 interface with high speed modem (b.1, b.2, b.3), high speed modem (b.1, b.2, b.3) is interconnected by the radio frequency connector of standard with simulation channel-splitting filter plate (e), and simulation channel-splitting filter plate (e) also links to each other with coaxial cable.
In the such scheme, the optical fiber interface in the optical transceiver (2) links to each other with front end system by optical fiber (1), and coaxial cable interface links to each other with optical node access server (8) by coaxial cable (3); Optical node access server (8) links to each other with amplifier (4) by coaxial cable (3), and amplifier (4) links to each other with splitter (5) by coaxial cable (3), forms the ground floor framework; Splitter (5) links to each other by coaxial cable (3) and splitter (5) or distributor (6) or amplifier (4) or coaxial socket (7), and distributor (6) passes through coaxial cable (3) and links to each other with coaxial socket (7), composition second layer framework; Thereby constitute the Hybrid Fiber Coaxial of two layer architectures.
In the such scheme, the optical fiber interface in the optical transceiver (2) links to each other with front end system by optical fiber (1), and coaxial cable interface links to each other with optical node access server (8) by coaxial cable (3); Optical node access server (8) links to each other with amplifier (4) by coaxial cable (3), and amplifier (4) links to each other with splitter (5) by coaxial cable (3), forms the ground floor framework; Splitter (5) links to each other with optical node access server (8) by coaxial cable (3) or passes through splitter (5) again or amplifier (4) links to each other with optical node access server (8), forms second layer framework; Optical node access server (8) links to each other with splitter (5) or distributor (6) by coaxial cable (3), splitter (5) links to each other with distributor (6) or coaxial socket (7) by coaxial cable (3), distributor (6) links to each other with coaxial socket (7) by coaxial cable (3), thereby forms the Hybrid Fiber Coaxial that three-tier architecture constitutes three-tier architecture.
Main feature of the present invention is as follows:
Use optical node access server (8) hfc plant that original scale is bigger to be divided into the less relatively sub-network of a plurality of scales, thereby the interference of converging that will concentrate originally is distributed in each sub-network and handle.Return path signal in each sub-network or upward signal use the processing mode classification of modulation-demodulation-modulation again to regenerate in communication process, eliminate the influence of various interference simultaneously.
Because what number of users was divided under each sub-network is fewer, so that the access interface place converges interference intensity is also smaller, optical node access server (8) can recover useful return path signal or upward signal from interference signal.Each coaxial cable of being kept apart by optical node access server (8) inserts converging of sub-network and disturbs and be independent of each other.After process optical node access server (8) carries out filtration treatment to various interference signals, each coaxial cable inserts converging interference and can not continuing upwards to propagate of sub-network, therefore it is very little to converge to the interference signal that optical transceiver (2) locates at last, and front end system can recover upward signal or return path signal easily.
Therefore, employing multi-layer framework of the present invention solves the method that converges interference, can realize reliable information passback, has solved and has converged interference problem, has improved the antijamming capability of hfc plant.
Description of drawings:
Fig. 1 is the hfc plant topological structure schematic diagram of prior art.
Fig. 2 is that the hfc plant and the employing multi-layer framework of the present invention of prior art solves the method schematic diagram that converges interference.
Fig. 3 is the theory diagram of the optical node access server among the present invention.
Fig. 4 is the structural representation of embodiments of the invention.
Among Fig. 1～Fig. 4, the 1st, optical fiber, the 2nd, optical transceiver, the 3rd, coaxial cable, the 4th, amplifier, the 5th, splitter, the 6th, distributor, the 7th, coaxial socket, the 8th, optical node access server.
Embodiment:
Be described in further detail the present invention below in conjunction with drawings and Examples, but the present invention is not limited only to described embodiment.
Optical transceiver among Fig. 1, amplifier, splitter, distributor and coaxial socket are the standardized product in the hfc plant, use coaxial cable to interconnect between these equipment.Optical transceiver possesses optical fiber interface and a plurality of coaxial cable interface, is responsible for the mutual conversion between the light signal and the signal of telecommunication.Amplifier amplifies the signal of telecommunication that coaxial cable transmits.Splitter and/or distributor can perhaps be mixed into single channel with multi-channel electric signal with single channel signal of telecommunication demultiplexing.Network configuration shown in Figure 1 is fit to the transmission of unidirectional downlink broadcast TV signal, but when it is used for upward signal or return path signal transmission, will run into the problem that converges interference.
Coaxial cable access network among Fig. 2 is meant the network that is formed by connecting by equipment such as coaxial cable, amplifier, splitter, distributor, coaxial sockets among Fig. 1.Coaxial cable inserts sub-network and is meant equipment component combination in the coaxial cable access network and the network of formation.In the single structure hfc plant of Fig. 2 left-half, all interference signals all directly converge at the optical transceiver place by the coaxial cable access network network, so the anti-interference capability that converges of network is poor.In the three-decker network of Fig. 2 right half part, the interference signal that each coaxial cable inserts in the sub-network only converges at the access interface place of access device (optical node access server).Because what number of users was divided under each sub-network is fewer, so that the access interface place converges interference intensity is also smaller, access device can recover useful return path signal or upward signal from interference signal.The interference of converging that each coaxial cable that the equipment of being access in is kept apart inserts sub-network is independent of each other.Return path signal in each sub-network or upward signal use the processing mode classification of modulation-demodulation-modulation again to regenerate in communication process, eliminate the influence of various interference simultaneously.After the process access device carries out filtration treatment to various interference signals, each coaxial cable inserts converging interference and can not continuing upwards to propagate of sub-network, therefore the interference signal that converges to Fig. 2 right half part network optical transceiver place at last is very little, and front end system can recover upward signal or return path signal easily.
The optical node access server 8 that the embodiment of the invention is used provides by Chinese patent (application number is 200320114955.7), its theory diagram as shown in Figure 3, optical node access server 8 is by optical fiber switch plate a, high speed modem b.1, b.2, b.3 form with simulation channel-splitting filter plate e, the port of optical fiber switch plate a links to each other with optical fiber, optical fiber switch plate A and high speed modem are b.1, b.2, b.3 interconnected by the RJ45 interface, high speed modem b.1, b.2, b.3 interconnected by the radio frequency connector of standard with simulation channel-splitting filter plate e, simulation channel-splitting filter plate e also links to each other with coaxial cable.
Fig. 4 is the realization block diagram of 1,2 layer of optical node access server.As shown in Figure 4, the optical fiber interface in the optical transceiver 2 links to each other with front end system by optical fiber 1, and coaxial cable interface links to each other with optical node access server 8 by coaxial cable 3; Optical node access server 8 links to each other with amplifier 4 by coaxial cable 3, and amplifier 4 links to each other with splitter 5 by coaxial cable 3, forms the ground floor framework; Splitter 5 links to each other with optical node access server 8 by coaxial cable 3 or links to each other with optical node access server 8 through splitter 5 or amplifier 4, forms second layer framework; Optical node access server 8 links to each other with splitter 5 or distributor 6 by coaxial cable 3, splitter 5 links to each other with distributor 6 or coaxial socket 7 by coaxial cable 3, distributor 6 links to each other with coaxial socket 7 by coaxial cable 3, thereby forms the Hybrid Fiber Coaxial that three-tier architecture constitutes three-tier architecture.
Wherein the modulation/demodulation modules that links to each other with access interface can be used QPSK (Quadrature Phase Shift Keying), PPM (pulse position modulation), n-QAM (multidigit quadrature amplitude modulation), FDQAM modulation systems such as (frequency division quadrature amplitude modulation), follow DOCSIS (V1.0, V1.1, V2.0 etc.) (cable data transport service interface specification) and/or HPNA (V1, V2, V3 etc.) (HPNA Home Phoneline Networking Alliance) standard.Can adopt MII (Media Independent Interface), RMII (Media Independent Interface of simplification), TBI (ten interfaces), GPSI modes such as (USB (universal serial bus)) to carry out interconnected between modulation/demodulation modules and the Switching Module.Switching Module can be supported the exchange of data link layer and/or network layer, can supported vlans (VLAN), and also can comprise one or more exchange chip, thereby make the port number of support can satisfy various needs.The CPU module is coordinated the work of Switching Module and modulation/demodulation modules by control bus.For 1,2 layer of optical node access server, the modulation/demodulation modules that its uplink port connected not only can be selected above-mentioned several different modulation system, and can also use optic module and Gigabit Ethernet technology to carry out communication as required.Access interface and uplink port are supported the coaxial cable of various different sizes.1,2 layers of optical node access server can adopt the mode of power supplied locally or far-end feed to work.
Claims (2)
1. one kind is adopted multi-layer framework to solve the method that converges interference, it is characterized in that by optical transceiver (2), coaxial cable (3), amplifier (4), splitter (5), distributor (6), in the network that coaxial socket (7) is formed by connecting, add optical node access server (8), optical node access server (8) is by optical fiber switch plate (a), high speed modem (b.1, b.2, b.3) and simulation channel-splitting filter plate (e) form, a port of optical fiber switch plate (a) links to each other with optical fiber, optical fiber switch plate (a) and high speed modem are (b.1, b.2, b.3) interconnected by the RJ45 interface, high speed modem (b.1, b.2, b.3) interconnected by the radio frequency connector of standard with simulation channel-splitting filter plate (e), simulation channel-splitting filter plate (e) also links to each other with coaxial cable; Wherein, the optical fiber interface in the optical transceiver (2) links to each other with front end system by optical fiber (1), and coaxial cable interface links to each other with optical node access server (8) by coaxial cable (3); Optical node access server (8) links to each other with amplifier (4) by coaxial cable (3), and amplifier (4) links to each other with splitter (5) by coaxial cable (3), forms the ground floor framework; Splitter (5) links to each other by coaxial cable (3) and splitter (5) or distributor (6) or amplifier (4) or coaxial socket (7), and distributor (6) passes through coaxial cable (3) and links to each other with coaxial socket (7), composition second layer framework; Thereby constitute the Hybrid Fiber Coaxial of multi-layer framework.
2. employing multi-layer framework according to claim 1 solves the method that converges interference, it is characterized in that the optical fiber interface in the optical transceiver (2) links to each other with front end system by optical fiber (1), coaxial cable interface links to each other with optical node access server (8) by coaxial cable (3); Optical node access server (8) links to each other with amplifier (4) by coaxial cable (3), and amplifier (4) links to each other with splitter (5) by coaxial cable (3), forms the ground floor framework; Optical node access server (8) links to each other with splitter (5) or distributor (6) by coaxial cable (3), splitter (5) links to each other with distributor (6) or coaxial socket (7) by coaxial cable (3), distributor (6) links to each other with coaxial socket (7) by coaxial cable (3), thereby forms the Hybrid Fiber Coaxial that three-tier architecture constitutes multi-layer framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101108072A CN100397891C (en) | 2003-10-29 | 2003-10-29 | Method for solving convergence interference using multi-nierarchy structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101108072A CN100397891C (en) | 2003-10-29 | 2003-10-29 | Method for solving convergence interference using multi-nierarchy structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1612608A CN1612608A (en) | 2005-05-04 |
| CN100397891C true CN100397891C (en) | 2008-06-25 |
Family
ID=34759238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101108072A Expired - Fee Related CN100397891C (en) | 2003-10-29 | 2003-10-29 | Method for solving convergence interference using multi-nierarchy structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100397891C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9942024B2 (en) * | 2015-07-15 | 2018-04-10 | Cisco Technology, Inc. | Full duplex network architecture in cable network environments |
| CN110875862B (en) * | 2018-08-31 | 2022-07-19 | 中兴通讯股份有限公司 | Message transmission method and device and computer storage medium |
| CN110933291B (en) * | 2019-06-06 | 2020-07-28 | 北京仁光科技有限公司 | Cross-network interaction system and cross-network interaction method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1196624A (en) * | 1997-04-17 | 1998-10-21 | 深圳市华为技术有限公司 | Integrated service network based on HFC |
| WO1999030449A1 (en) * | 1997-12-05 | 1999-06-17 | Com21, Inc. | An apparatus for upstream signal selection |
| CN2508498Y (en) * | 2001-12-28 | 2002-08-28 | 龙永庆 | Cable TV terminal distribution amplifier |
| CN2529474Y (en) * | 2002-03-21 | 2003-01-01 | 苏州大学 | Device for monitoring and managing two-way wired TV. network equipment |
| CN1435973A (en) * | 2002-01-30 | 2003-08-13 | 李兴利 | HFC wide-band switch in using HOMEPNA technique combined with Ethernet technique |
-
2003
- 2003-10-29 CN CNB2003101108072A patent/CN100397891C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1196624A (en) * | 1997-04-17 | 1998-10-21 | 深圳市华为技术有限公司 | Integrated service network based on HFC |
| WO1999030449A1 (en) * | 1997-12-05 | 1999-06-17 | Com21, Inc. | An apparatus for upstream signal selection |
| US6137793A (en) * | 1997-12-05 | 2000-10-24 | Com21, Inc. | Reverse path multiplexer for use in high speed data transmissions |
| CN2508498Y (en) * | 2001-12-28 | 2002-08-28 | 龙永庆 | Cable TV terminal distribution amplifier |
| CN1435973A (en) * | 2002-01-30 | 2003-08-13 | 李兴利 | HFC wide-band switch in using HOMEPNA technique combined with Ethernet technique |
| CN2529474Y (en) * | 2002-03-21 | 2003-01-01 | 苏州大学 | Device for monitoring and managing two-way wired TV. network equipment |
Non-Patent Citations (2)
| Title |
|---|
| HFC双向网络中噪声解决方法. 侯善宏，曹彩祥.中国传媒科技. 2003 |
| HFC双向网络中噪声解决方法. 侯善宏，曹彩祥.中国传媒科技. 2003 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1612608A (en) | 2005-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE19714386C1 (en) | Method and arrangement for data transmission in low-voltage networks | |
| CN100448213C (en) | HFC network wideband access system based on MoCA technology | |
| CN101242674A (en) | An integrated service access system based on EPON and dual-mode STB | |
| CN100576813C (en) | Coaxle cable exchanging system and method | |
| CN103873262B (en) | coaxial cable power supply system | |
| CN101511043B (en) | Synthesis business networking method based on HFC broadband network, and synthesis business optical station equipment | |
| CN102437941B (en) | Ethernet passive optical network (EPON) optical network unit fusing Ethernet over coaxial cable (EoC) function | |
| DE60215222T2 (en) | HYBRID FIBER OPTIC AND COAXIAL CABLE NETWORK NODES WITH A CABLE MODEM CLOSURE SYSTEM | |
| CN101808344A (en) | Ethernet passive electric network | |
| CN100397891C (en) | Method for solving convergence interference using multi-nierarchy structure | |
| CN101883297A (en) | Digital broadband integration and superposition system and method thereof | |
| CN101277420A (en) | Bidirectional access equipment for CATV network | |
| CN201374788Y (en) | Integrated service light station | |
| CN106789921A (en) | A kind of exchange method and interchanger for supporting that member port is isolated in VLAN | |
| CN202334775U (en) | Next generation broadcasting network local controller | |
| CN201928398U (en) | FEoC access system for two-way transformation of broadcasting and television network | |
| CN102694783A (en) | Tri-network integrated multi-service photoelectric integrated network element | |
| CN101478504B (en) | Multimedia house gateway and method for implementing conversion between signals of optical cable and coaxial electric cable | |
| CN200941630Y (en) | HFC net high frequency wide band access system | |
| CN201114078Y (en) | Passive optical network terminal | |
| CN106961290A (en) | I type concentrator bandwidth carrier communication modules based on high-performance carrier Control technology | |
| CN203457168U (en) | Three-in-one intelligent integrated optical node equipment | |
| CN207442852U (en) | G.hn multiple-channel output head-end systems | |
| CN203632876U (en) | Mobile communication coverage system supporting fixed network data communication | |
| CN206894672U (en) | Fiber optic cables hybrid passive network channel adaptive receiving system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080625 Termination date: 20091130 |