CN1173544C - Coaxial long-distance Ethernet connection method and its equipment - Google Patents
Coaxial long-distance Ethernet connection method and its equipment Download PDFInfo
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- CN1173544C CN1173544C CNB011202203A CN01120220A CN1173544C CN 1173544 C CN1173544 C CN 1173544C CN B011202203 A CNB011202203 A CN B011202203A CN 01120220 A CN01120220 A CN 01120220A CN 1173544 C CN1173544 C CN 1173544C
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Abstract
The present invention relates to a coaxial long-distance Ethernet access method and a device thereof. The existing cable television HFC network is a broadband network and has the basis of realizing the broadband access for users. The present invention mainly aims to realize speech processing at high speed in a long distance and the synchronous transmission of videos and data by the frequency hopping technique and the token technique under the condition of multi-user units, such as residential districts, hotels, office buildings, dormitory buildings of students, etc. The present invention overcomes the defect that the Ethernet can not be utilized because of distance limitation or old cable networks, and therefore, long-distance transmission at high speed with symmetrical upper rows and lower rows is realized. In the method and the device of the present invention, the requirement for the quality of lines is low; the Ethernet is supported on the coaxial cable of a cable television, and the whole service of the cable television is supported at the same time, so that the called 'final-kilometer' breakthrough is realized.
Description
Technical field
What the present invention relates to is a kind of coaxial long-distance Ethernet cut-in method, and the equipment that is used to realize this method, to utilize existing cable TV HFC network, realizes that consumer wideband inserts; Belong to network communications technology.
Background technology
In the prior art, the technology close with this equipment is based on the wire cable modem technology of F/TDMA and SCDMA.
Wherein, F/TDMA network technology basis is that data stream modulates is become RF stream, frequency division/time-division, up employing QPSK/QAM modulation, speed 1-10M; The characteristics of this network are that part is utilized existing HFC net.
And SCDMA network technology basis also is that data stream modulates is become RF stream, carries out S-CDMA then; This network characteristics is to make full use of existing HFC net.
The shortcoming of above-mentioned two kinds of network technologies is shared channels, has noise to compile, and needs to increase light passback/accepting device, and is high to coaxial requirement.
Summary of the invention
Main purpose of the present invention is to provide a kind of coaxial long-distance Ethernet cut-in method, this method can be in long distance be coaxial, reach rate processing language, video and the data sync transmission of 100-500MBPS and even 1GBPS according to the speed of 10MBPS or 56MBPS, overcome with preceding because of distance limit or and cost, technology cause can't utilize the defective of Ethernet, realize the breakthrough of " last kilometer ".
Further object of the present invention is to provide a kind of coaxial long-distance Ethernet access device that is used to realize described method.
Purpose of the present invention can be achieved in the following manner: a kind of coaxial long-distance Ethernet cut-in method, comprise at the access device of the Ethernet of using this method and to utilize the setting of head end, amplifier, repeater and user terminal the head end of forming by coaxial cable input, coaxial cable output port and twisted-pair feeder/optical fiber interface to finish and to be connected with the optical node Fast Ethernet; Adopt the amplifier of forming by coaxial cable input, output port to support the harmless transmission of cable TV signal simultaneously, cooperate head end to realize separating of TV signal and network digital signal and synthetic; Adopt the repeater of forming by coaxial cable input, output port to support the harmless transmission of cable TV signal again, cooperate amplifier to strengthen the intensity of network digital signal simultaneously; The television set that also adopts the ustomer premises access equipment of being made up of TV input, output port and twisted-pair feeder 10M RJ-45 interface to be connected the user is connected with the broadband network that computer equipment is finished the user; Simultaneously finish whole piece coaxial ethernet feature with frequency-hopping spread spectrum and token ring technology described in coaxial, coaxially go up the Ethernet transmission to share speed be 10M, 56M, 100M, 500M, 1000M, the user terminal transmission rate is 10M.
A kind ofly be used for above-mentioned coaxial long-distance Ethernet access device, described equipment comprises head end, amplifier, repeater and user terminal, described head end has the coaxial cable input, output port, and twisted-pair feeder/optical fiber interface, described amplifier has the coaxial cable input, output port, described repeater has the coaxial cable input, output port, described ustomer premises access equipment has the TV input, output port and twisted-pair feeder 10M RJ-45 interface, it is 10M that speed is shared in the transmission of described coaxial upward Ethernet, 56M, 100M, 500M, 1000M, the user terminal transmission rate is 10M.
Head end, amplifier, repeater and user side are set between Ethernet incoming end and user side, wherein, head end is supported the harmless transmission of cable TV signal and finishes with the optical node Fast Ethernet to be connected with amplifier, has solved separating and synthesizing of TV signal and network digital signal; Repeater is supported the harmless transmission of cable TV signal and is cooperated described amplifier to strengthen the intensity of network digital signal; User side is provided with TV input, output port and television set and the computer equipment of twisted-pair feeder 10M RJ-45 interface to be connected the user, and the broadband network of finishing the user under the support of described head end, amplifier and repeater connects.
Below be description of drawings of the present invention, by description of drawings and engage the following detailed description, can be expressly understood the present invention, wherein:
Description of drawings
Fig. 1 is coaxial long-distance Ethernet access device (CLRE) the head end simplified schematic diagram of equipment of the present invention;
Fig. 2 is the simplified schematic diagram of the amplifier of the described coaxial long-distance Ethernet of Fig. 1 access device (CLRE);
Fig. 3 is the simplified schematic diagram of the repeater of the described coaxial long-distance Ethernet of Fig. 1 access device (CLRE);
Fig. 4 is the simplified schematic diagram of the user side of the described coaxial long-distance Ethernet of Fig. 1 access device (CLRE);
Embodiment
Below be detailed description of the present invention, by the following detailed description and engage embodiment, can be expressly understood the present invention more.
As everyone knows, coaxial dielectric itself does not have unidirectional two-way restriction.Current cable is propagated the bidirectional high speed that adopts one-way transmission, researcher of the present invention to utilize this medium to finish data-signal as TV signal and is transmitted.
Researcher of the present invention utilizes frequency hopping, spread spectrum and token ring to handle the means of conflict, according to the performance of cable TV wire rod device, selects for use and finishes data up-downgoing modulation and transmission in the transmission band the 75M-550M that uses except that television transmission.
Because equipment of the present invention has made full use of frequency hopping, spread spectrum, therefore do not need the signal frequency range is limited, data-signal can the optimal frequency range of selection voluntarily transmit.
Spread spectrum of the present invention, formerly former is the broadband wireless communication technique of using in the military communication field, uses spread spectrum, can make data complete reliable in wireless transmission.And guarantee that the data of transmitting at different frequency range simultaneously can not interfere with each other.
Frequency hopping of the present invention is different fully with the direct sequence spread spectrum technology, it is another spread spectrum, the carrier frequency of described frequency hopping is subjected to the control of a pseudo noise code, in its bandwidth of operation scope, its frequency constantly changes frequency by random law, and the frequency of receiving terminal is also pressed the random law variation, and maintenance is consistent with the Changing Pattern of transmitting terminal.The height of frequency hopping directly reflects the performance of frequency-hopping system, and frequency hopping is high more, and jamproof performance is good more, and military frequency-hopping system can reach per second jumpings up to ten thousand.In fact the mobile communication gsm system also is a frequency-hopping system.For the consideration of cost, commercial frequency-hopping system hop rate is all slower, generally below 50 jumping/seconds.The present invention is applied to cable TV coaxial with these technology.
Coaxial long-distance Ethernet access device of the present invention (CLRE) comprises a head end (seeing accompanying drawing 1), and this head end has coaxial cable input, output port, supports the harmless transmission of cable TV signal; This head end also has twisted-pair feeder/optical fiber interface, finishes with the optical node Fast Ethernet to be connected, and this mode has solved separating of TV signal and network digital signal and synthetic, has guaranteed the network rate on the coaxial cable.
Described equipment also comprises an amplifier (seeing accompanying drawing 2), this amplifier has coaxial cable input, output port, support the harmless transmission of cable TV signal, cooperate described head end to solve separating of TV signal and network digital signal and synthetic, guarantee the network rate on the coaxial cable.
Described equipment also comprises a repeater (seeing accompanying drawing 3), this repeater has coaxial cable input, output port, support the harmless transmission of cable TV signal, cooperate described amplifier to strengthen the intensity of network digital signal simultaneously, guarantee the network rate on the coaxial cable.
Equipment of the present invention also comprises a ustomer premises access equipment (seeing accompanying drawing 4), described user side has TV input, output port and twisted-pair feeder 10M RJ-45 interface, the television set and the computer equipment that connect the user, the broadband network of finishing the user under the support of described head end, amplifier and repeater connects.
The invention has the advantages that the frequency range that does not need data-signal transmission stipulates that data-signal can be voluntarily The only frequency range of selection transmit, realize the network bi-directional transformation, discharged that bandwidth because of amplifier causes Line bandwidth restriction has the effect of relaying to data signal, and the passback noise that brings of erase amplifier.
Claims (5)
1, a kind of coaxial long-distance Ethernet cut-in method, it is characterized in that access device at the Ethernet of using this method comprises the setting of head end, amplifier, repeater and user terminal, utilizes the head end of being made up of coaxial cable input, coaxial cable output port and twisted-pair feeder/optical fiber interface to finish with the optical node Fast Ethernet and is connected; Adopt the amplifier of forming by coaxial cable input, output port to support the harmless transmission of cable TV signal simultaneously, cooperate head end to realize separating of TV signal and network digital signal and synthetic; Adopt the repeater of forming by coaxial cable input, output port to support the harmless transmission of cable TV signal again, cooperate amplifier to strengthen the intensity of network digital signal simultaneously; The television set that also adopts the ustomer premises access equipment of being made up of TV input, output port and twisted-pair feeder 10M RJ-45 interface to be connected the user is connected with the broadband network that computer equipment is finished the user; Simultaneously finish whole piece coaxial ethernet feature with frequency-hopping spread spectrum and token ring technology described in coaxial, coaxially go up the Ethernet transmission to share speed be 10M, 56M, 100M, 500M, 1000M, the user terminal transmission rate is 10M.
2, method according to claim 1, it is characterized in that utilizing frequency hopping, spread spectrum and token ring to handle the means of conflict, according to the performance of cable TV wire rod device, select for use and finish data up-downgoing modulation and transmission in the transmission band the 75M-550M that uses except that television transmission.
3, a kind of coaxial long-distance Ethernet access device that is used for claim 1, it is characterized in that described equipment comprises head end, amplifier, repeater and user terminal, described head end has the coaxial cable input, output port, and twisted-pair feeder/optical fiber interface, described amplifier has the coaxial cable input, output port, described repeater has the coaxial cable input, output port, described ustomer premises access equipment has the TV input, output port and twisted-pair feeder 10M RJ-45 interface, it is 10M that speed is shared in the transmission of described coaxial upward Ethernet, 56M, 100M, 500M, 1000M, the user terminal transmission rate is 10M.
4, equipment according to claim 3, the means that it is characterized in that described equipment utilization frequency hopping, spread spectrum and token ring processing conflict, according to the performance of cable TV wire rod device, select for use and finish data up-downgoing modulation and transmission in the transmission band the 75M-550M that uses except that television transmission.
5, equipment according to claim 3 is characterized in that the data-signal of described equipment can the only frequency range of selection voluntarily transmit.
Priority Applications (1)
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CNB011202203A CN1173544C (en) | 2001-07-09 | 2001-07-09 | Coaxial long-distance Ethernet connection method and its equipment |
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CNB011202203A CN1173544C (en) | 2001-07-09 | 2001-07-09 | Coaxial long-distance Ethernet connection method and its equipment |
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CN1173544C true CN1173544C (en) | 2004-10-27 |
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CNB011202203A Expired - Fee Related CN1173544C (en) | 2001-07-09 | 2001-07-09 | Coaxial long-distance Ethernet connection method and its equipment |
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Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101075882B (en) * | 2006-05-15 | 2010-04-21 | 杭州华三通信技术有限公司 | Ethernet transceiver and method for realizing signal long-distance transmission |
CN101193043B (en) * | 2006-12-01 | 2012-02-15 | 北京东方广视科技股份有限公司 | A method for realizing data back transfer in CATV network |
WO2008086671A1 (en) * | 2007-01-15 | 2008-07-24 | Hangzhou H3C Technologies Co., Ltd. | Adaptation method and apparatus for ethernet signal transmission |
CN101232305B (en) * | 2007-01-23 | 2012-07-25 | 杭州华三通信技术有限公司 | Method and apparatus for adapting Ethernet signal transmission |
CN101227295B (en) * | 2007-01-15 | 2011-02-02 | 杭州华三通信技术有限公司 | Ethernet transmission method and Ethernet transmitting/receiving device based on coaxial cable network |
CN101632268B (en) * | 2007-02-06 | 2014-12-03 | 熵敏通讯股份有限公司 | Parameterized quality of service architecture in a network |
CN101282315B (en) * | 2007-04-06 | 2010-10-27 | 杭州华三通信技术有限公司 | Distribution method, system and terminal sharing transmission medium |
US8254413B2 (en) * | 2008-12-22 | 2012-08-28 | Broadcom Corporation | Systems and methods for physical layer (“PHY”) concatenation in a multimedia over coax alliance network |
US9071358B2 (en) * | 2012-06-21 | 2015-06-30 | Qualcomm Incrorporated | Repeater fiber-coax units |
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