CN100345421C - Broadband access system and access method implemented on cable TV network - Google Patents
Broadband access system and access method implemented on cable TV network Download PDFInfo
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Abstract
The invention provides a broadband access system and access method implemented on cable TV network, comprising a synthesis light gathering station, a duplex mixer, a branching device, a network side of the HFC coaxial distribution, a terminal accessing device connected with the HFC light network side of the cable TV network, IP area network. Also provided is a broadband accessing method, comprising: synthesis light gathering station receiving the CATV light signal, a data signal and converting into the CATV radio frequency signal and the data radio frequency signal, transmitting to the duplex mixer for a multiplexing and transmitting to the branching device through the HFC coaxial distribution network side, demultiplexing to a source signal and transmitting to the TV and terminal receiver respectively; and the duplex mixer receiving the upstream signal from the HFC coaxial distribution network side and demultiplexing to the data radio frequency signal and transmitting to the IP area network through the synthesis light gathering station. The invention can access the broadband based on the CATV network in a lower cost.
Description
Technical field
The present invention relates to broadband network access technology field, specifically refer to a kind of system and cut-in method thereof of realizing broadband access at cable TV on the net.
Background of invention
In certain zone, for providing the system of multiway images, sound radio and data-signal, the user is called cable TV (CATV) system with wired mode.After middle nineteen nineties, along with the progress of society, the development of technology, the CATV system develops rapidly towards the direction of extensiveization, multifunction, multi-serviceization.Because the development of new technology, development as the optical fiber technology in the optical transport technology, transmitted in both directions technology, Hybrid Fiber and Coax Network HFC (HFC) technology, make the CATV system except realizing the transmission of basic broadcast TV program, can also realize various new business such as VOD, multimedia service, based on the broadband access of catv network etc.
Especially the development of optical transport technology, the a series of defectives that the CATV system used the coaxial cable transmission means have originally been overcome, advanced catv network by of the change of former coax network, can think the once great leap of CATV systems technology development to Hybrid Fiber and Coax Network HFC.Simultaneously, the developing rapidly of broadband network and broadband services, and, therefore, proposed to realize the scheme of broadband access by catv network because the CATV system has substantially covered all subscriber households.
For pure catv network, the HFC that is adopted comprises HFC optical-fiber network side and the coaxial distribution network side of HFC, because catv network adopts the mode of broadcasting that TV signal is downlinked to each user, so the optical-fiber network side of hfc plant is the network of one-way transmission.
In order to realize broadband access, the optical-fiber network side of hfc plant need be changed to bilateral network, to realize the uplink of data based on catv network.Show the broadband access system of realizing based on catv network as Fig. 1.
This broadband access system mainly comprises: Ethernet switch 102 (LAN Switch), cable modem local side apparatus 103 (CMTS, Cable Modem TerminationSystem), hfc plant, splitter 109 and the cable modem 110 (CM, Cable Modem) etc. of coaxial distribution network side 108 formations of upconverter 105, blender 106, HFC optical-fiber network side 107 and HFC.
For downlink data, after the data-signal of IP metropolitan area network sends CMTS 103 to by Ethernet switch 102, CMTS 103 is transformed to downstream signal by upconverter 105 channel of CATV, by blender 106 this downstream signal is multiplexed in the CATV signal, be sent to the coaxial distribution network side 108 of HFC by HFC optical-fiber network side 107, after isolating this downstream signal by splitter 109 then, restore the IP data-signal by CM 110.For upstream data, the user is converted to radiofrequency signal by CM 110, be sent to coaxial distribution network side 108 by splitter 109, sending CMTS 103 to by improved HFC optical-fiber network side 107, then be converted to the IP data and be sent to the IP metropolitan area network by Ethernet switch 102 by CMTS 103.
Adopt the major defect of this broadband access system to be: need change to original HFC optical-fiber network side, because pure catv network is descending one-way transmission, therefore to realize the uplink of data, the optical-fiber network that the HFC optical-fiber network of the one-way transmission of former CATV need be changed to transmitted in both directions is to support uplink and downlink signals, more to network change, as comprise optical receiving device is increased passback optical sender etc.Adopt this scheme, not only want newly added equipment, the more important thing is, transformation HFC optical-fiber network will be considered the influence to former catv network, thereby the complexity that network rebuilding process is become causes cost higher.
On the other hand, access device places the optical node place, generally in network configuration, place the access device at an optical node place should be designed to have the ability that covers 500 users at least, corresponding administration overhead, bandwidth cost cost all are configured with the ability greater than 500 users, and cost is also higher.
In addition, from input cost than and income recently, need above-mentioned cost input, and it is less to adopt catv network to carry out the user of broadband access, then the input cost ratio is far longer than the income ratio, especially builds at the network initial stage, because the user very little, cost-recovering is longer to the cycle of profit, and the market income is poor.
Summary of the invention
The object of the invention is to provide a kind of realize broadband access system on the net at cable TV and cut-in method, makes to realize broadband access based on catv network with lower cost.
The invention provides the system that realizes broadband access at cable TV on the net, this cable television network comprises HFC optical-fiber network side (107) and the coaxial distribution network side of HFC (108), this system comprises: comprehensively converge light-gathering station (201), duplexing blender (202), splitter (109), terminal access device (203), wherein
The comprehensive light-gathering station (201) that converges links to each other with HFC optical-fiber network side (107), IP metropolitan area network, duplexing blender (202) respectively, being used for will be from the CATV light signal of HFC optical-fiber network side (107), be converted to the CATV radiofrequency signal respectively and the data radiofrequency signal sends to duplexing blender (202) from the data-signal of IP metropolitan area network, and will be converted to data-signal from the data radiofrequency signal of duplexing blender (202) and send to the IP metropolitan area network;
Duplex blender (202), link to each other with splitter (109) by the coaxial distribution network side of HFC (108), be used for will from the CATV radiofrequency signal of comprehensive remittance light-gathering station (201) and data radiofrequency signal carry out multiplexing after, send to splitter (109), and the signal demultiplexing that splitter (109) is uploaded is gone out the data radiofrequency signal send to comprehensive remittance light-gathering station (201)
Splitter (109) links to each other with terminal access device (203), be used for to go out the data radiofrequency signal from the signal demultiplexing of duplexing blender (202) and send terminal access device (203) to, and in the future the data radiofrequency signal of self terminal access device (203) is multiplexed into and sends to duplexing blender (202) in the upward signal;
Terminal access device (203) is used to realize the conversion of data radiofrequency signal and data-signal.
Wherein, described comprehensive remittance light-gathering station (201) comprising: optical receiver (2011), radio frequency amplifier (2012), Ethernet switch (2013) and data insertion equipment (2014); Optical receiver (2011) and radio frequency amplifier (2012), link to each other with outside HFC optical-fiber network side (107), be used for will reception the CATV light signal, be converted to the CATV radiofrequency signal and send to radio frequency amplifier; Radio frequency amplifier (2012) is used for the CATV radiofrequency signal that receives is amplified, and exports to outside duplexing blender (202); Ethernet switch (2013) is used to realize the forwarding of data-signal between data insertion equipment (2014) and IP metropolitan area network with data insertion equipment (2014), link to each other with described IP metropolitan area network; Data insertion equipment (2014) also links to each other with the duplexing blender in outside (202), is used to realize the conversion of data-signal and data radiofrequency signal.
Wherein, described data insertion equipment (2014) comprising: radio frequency interface unit, Transmit Receive Unit, base band and MAC processing unit, main CPU unit, Ethernet Transmit-Receive Unit and Ethernet interface unit, and described each unit connects successively; Transmit Receive Unit and radio frequency interface unit are realized the reception and the transmission of data radiofrequency signal jointly; Base band and MAC processing unit are used to realize to the physical layer of data radiofrequency signal and the processing of MAC layer; Main CPU unit is used to realize the conversion of data-signal and data radiofrequency signal form, reaches the control to base band and MAC processing unit; Ethernet Transmit-Receive Unit and Ethernet interface unit are realized the reception and the transmission of data-signal jointly.
The present invention also provides a kind of method that realizes broadband access at cable TV on the net, this cable television network comprises HFC optical-fiber network side (107) and the coaxial distribution network side of HFC (108), broadband access system comprises comprehensive remittance light-gathering station (201), duplexing blender (202), splitter (109), terminal access device (203), described broad band access method comprises the downlink transfer and the uplink of data, wherein
The downlink transfer of data comprises step:
Comprehensive remittance light-gathering station (201) receives the data-signal from the IP metropolitan area network, is converted to the data radiofrequency signal and sends to duplexing blender (202);
Duplex blender (202) is multiplexed into the data radiofrequency signal that receives in the descending radiofrequency signal, sends splitter (109) to by the coaxial distribution network side of HFC (108);
Splitter (109) goes out the data radiofrequency signal with the radiofrequency signal demultiplexing that receives and sends to terminal access device (203);
Terminal access device (203) is converted to data-signal with the data radiofrequency signal and sends to the user data terminal equipment;
The uplink of data comprises step:
Terminal access device (203) will be converted to the data radiofrequency signal from the data-signal of user data terminal equipment and send to splitter (109);
Splitter (109) is multiplexed into the data radiofrequency signal that receives in the up radiofrequency signal, sends to duplexing blender (202) by the coaxial distribution network side of HFC (108);
The up radiofrequency signal demultiplexing that duplex blender (202) will receive goes out the data radiofrequency signal and sends to comprehensive remittance light-gathering station (201);
Comprehensive remittance light-gathering station (201) will be converted to data-signal and send to the IP metropolitan area network from the data radiofrequency signal of duplexing blender (202).
Wherein, described data radiofrequency signal is the radiofrequency signal greater than 860MHz.
Wherein, described data-signal is the lan protocol signal, and described data radiofrequency signal is the WLAN protocol signal.
Wherein, described lan protocol comprises the IEEE802.3 agreement; Described WLAN agreement comprises IEEE802.11a, IEEE802.11b or IEEE 802.11g agreement.
Wherein, described frequency division multiplexing or the time division multiplexing of being multiplexed with.
After adopting above-mentioned technical scheme, the present invention has following advantage:
1, broadband access system provided by the invention effectively utilizes the coaxial cable resource of the coaxial distribution network side of HFC of existing catv network, has realized that on catv network a line of broadband access and cable television service is registered one's residence.The present invention directly is connected access device with the coaxial distribution network side of the HFC of CATV system, HFC optical-fiber network side is not changed, and can adopt the network of original CATV fully, and new equipment only superposes on legacy network.With respect to prior art,, reduced the cost of initial stage input owing to need not transform HFC optical-fiber network side.And realize broadband access owing to adopted in the superpose mode of new equipment of former catv network, less to the influence of former catv network.
2, from network configuration, because data insertion equipment of the present invention places coaxial distribution network side, place the customer volume that equipment covered of this side gusset less, access device approximately has the ability that covers 200 users, and this enough uses for the less situation of present user, and because it is less to cover user capability, corresponding administration overhead cost, the bandwidth cost cost also can be less relatively.
3, from input cost than and income recently, the cost input is lower, suppose to drop into the design of 200 user cost ratios, uses 100 users' accesses, input ratio and income were understood very fast cost-recovering and income than about 200: 100.
4, the data that the present invention has also adopted the high band transmission broadband to insert away from the noise frequency, thereby have improved the antijamming capability of transfer of data, have reduced the data transmission error rate.And, owing to further used WLAN agreement, transfer of data to have the better anti-abominable performance that the WLAN agreement is had.
Brief Description Of Drawings
Fig. 1 is existing broadband access system structure chart based on catv network;
Fig. 2 is the broadband access system structure chart that the present invention is based on catv network;
Fig. 3 is a data insertion equipment structure chart of the present invention;
Fig. 4 is the flow chart of data downstream transmission;
Fig. 5 is the flow chart of data upstream transmission.
Implement mode of the present invention
The invention provides a kind of scheme that realizes broadband access by catv network, Ethernet switch and data insertion equipment are moved down into the coaxial distribution network side of HFC, make Ethernet switch and data insertion equipment no longer be directly connected to the coaxial distribution network side of HFC by HFC optical-fiber network side part, can avoid like this HFC optical-fiber network side is carried out the transformation of transmitted in both directions, avoid transformation the optical receiver of former catv network.And, also utilized the coaxial cable resource of the coaxial distribution network side of HFC to realize being linked into the user, insert this part circuit of user and need not go separately to set up.
Ethernet switch and data insertion equipment directly are configured in sub-district light-receiving pusher side, though can't cover large-capacity user,, this has just met at present by the less situation of CATV wide band access user.Accordingly, administration overhead, bandwidth cost cost are also little, can very fast cost-recovering and income.
In addition, the frequency of various noises mainly concentrates on below the 30MHz in the catv network, comprise that subscriber terminal equipment, faulty equipment, defective joint and the mains switch etc. that come from Web content produce 30MHz following interference signal and noise, also has interference noise from 5～30MHz of network-external, and the broadband access system of existing catv network mainly adopts the following frequency band of 50MHz to carry out the upstream data transmission, close with the noise frequency, upstream data is subjected to The noise very big, causes the appearance of error code easily.Therefore, the present invention has also adopted higher frequency transmitting user data, because the range of signal of coaxial distribution network carrying is 5～1000MHz, so the present invention advises adopting the data-signal of the frequency transmission user of 100MHz～1000MHz.Preferably, can adopt 860-1000MHz, because can be away from the frequency of CATV downstream signal.In addition, the present invention has also adopted WLAN agreement (IEEE802.11) to realize the transmission of data, directly transplanting the antijamming capability of the excellence that had of WLAN agreement.
Below with reference to the system construction drawing that the present invention is based on CATV net realization broadband access as shown in Figure 2, broadband access system of the present invention is elaborated.This system mainly comprises:
The comprehensive light-gathering station 201 that converges links to each other with HFC optical-fiber network side 107, also is connected with the IP metropolitan area network, links to each other with duplexing blender 202; Being used for will be from the CATV light signal of HFC optical-fiber network side 107, be converted to radiofrequency signal from the data-signal of IP metropolitan area network sends to duplexing blender 202, and will be converted to data-signal from the radiofrequency signal of duplexing blender 202 and send to the IP metropolitan area network.Specifically, comprehensively converging light-gathering station 201 is made up of optical receiver 2011, radio frequency amplifier 2012, Ethernet switch 2013 and a plurality of data insertion equipment 2014.Wherein,
Optical receiver 2011 links to each other with radio frequency amplifier 2012, and optical receiver 2011 is used to receive described CATV light signal, and is converted to radiofrequency signal and sends to radio frequency amplifier 2012 and amplify, and exports to outside a plurality of duplexing blender 202 then.
Ethernet switch 2013 links to each other with a plurality of data insertion equipments 2014, and Ethernet switch 2013 also links to each other with described IP metropolitan area network, is used to realize the mutual forwarding of data-signal between data insertion equipment 2014 and IP metropolitan area network.Data insertion equipment 2014 also links to each other with duplexing blender 202, and data insertion equipment 2014 is used to realize the conversion of data-signal and radiofrequency signal, and for convenience, the radiofrequency signal that data-signal is converted to is called the data radiofrequency signal.Specifically, data insertion equipment 2014 is used to finish the mutual conversion of wireless protocols IEEE802.11 and ethernet ieee 802.3 agreements.By the WLAN consensus standard as can be known, if use the IEEE802.11b agreement, then transmission rate can reach 11Mbps/22Mbps; If use IEEE802.11g or IEEE802.11a agreement, then speed can be up to 54Mbps.Data insertion equipment 2014 also the achieve a butt joint control and the management of access customer.
Broadband access system of the present invention also comprises:
Duplex blender 202, its number is the same with the number of data insertion equipment 2014, each duplexing blender 202 all is connected with above-mentioned radio frequency amplifier 2012, also respectively correspondingly with a plurality of data insertion equipments 2014 in one be connected, 202 effects of duplex blender are radio frequency amplifier 2012 to be sent the CATV radiofrequency signal (contain Digital Television QAM radiofrequency signal, mix new signal of generation with the data radiofrequency signal that data insertion equipment 2014 transmits down together) and send to the coaxial distribution network side 108 of HFC, and will separate from the data radiofrequency signal that the coaxial distribution network side 108 of HFC is uploaded and mix to come out, send to the data insertion equipment 2014 that is connected.When duplexing blender 202 adopted frequency division multiplexing, then the carrying of the high band of mixed downstream signal was the IEEE802.11 protocol signal, and what low-frequency range was carried is the CATV signal.And, realize IEEE802.11 protocol signal demultiplexing from the high band of upward signal of carrying is come out for upward signal.It will be apparent to those skilled in the art that duplexing blender 202 also can adopt modes such as time division multiplexing to come two signals of multiplex/demultiplex, below no longer to this explanation.
The coaxial distribution network side 108 of HFC, be the coax network part of hfc plant, be used for distributing to carry out multichannel from duplexing blender 202 radiofrequency signals that send over, mixed, send to each splitter 109, and will send duplexing blender 202 to from the upward signal that splitter 109 sends.
Terminal access device 203, link to each other with subscriber computer (PC) with splitter 109, can be arranged in the user family, be used to realize the conversion of radiofrequency signal and data-signal, specifically, realize from the IEEE802.3 protocol signal of the computer that is attached thereto and from the conversion between the IEEE802.11 protocol signal of splitter 109.
The schematic diagram of comprehensive remittance light-gathering station 201 data insertion equipments 2014 of the present invention as shown in Figure 3 comprises:
Radio frequency interface unit and the Transmit Receive Unit that is attached thereto, the radio frequency interface unit is used to exchange the radiofrequency signal that is shaped on wideband data and carries out power amplification, and radio frequency interface is provided; Transmit Receive Unit is used to realize the reception and the transmission of radiofrequency signal.In the Transmit Receive Unit and radio frequency interface element circuit of reality, come the adjustment of devices such as matching network and frequency synthesizer, line filter by impedance adjustment to wherein rf modulation circuit part, make carrier wave satisfy the requirement of 860～1000MHz frequency, realize the reception and the transmission of this frequency range data radiofrequency signal.
Base band and MAC processing unit, be connected with described Transmit Receive Unit, this unit realizes to the physical layer of data radiofrequency signal and the processing of MAC layer that according to 802.11 agreements this unit can design with reference to base band and MAC processing unit standard in the ripe wlan system fully.
Ethernet interface unit and the Ethernet Transmit-Receive Unit that is attached thereto, Ethernet interface unit are mainly used in realizes that ethernet signal is isolated and protection, and the ethernet standard interface is provided, and transmission meets the Ethernet data of 802.3 standards; The Ethernet Transmit-Receive Unit is used to realize the reception and the transmission of ethernet signal.Ethernet Transmit-Receive Unit and Ethernet interface unit can be realized with general ethernet mac and physical chip.
Main CPU unit is connected with the Ethernet Transmit-Receive Unit of stating, and is used to realize the conversion of Ethernet data signal and data radiofrequency signal form, and realizes the control to base band and MAC processing unit, and available universal cpu is realized.Specifically, realize the format conversion of 802.11MAC frame and 802.3MAC frame, link to each other by bus with the MAC processing unit, it is controlled with base band.
The present invention also provides the data transmission method based on above-mentioned broadband access system accordingly.Comprise the uplink of data and the downlink transfer of data.
Data downstream transmission (promptly being transferred to the user side direction from network side) flow chart as shown in Figure 4 may further comprise the steps:
Step 401: the data-signal that is passed down by the IP metropolitan area network passes through Ethernet switch 2013, adopts 802.3 agreements that data-signal is passed to data insertion equipment 2014.Data insertion equipment 2014 is finished 802.3 to 802.11 protocol conversion, the data signal modulation that receives is become the data radiofrequency signal (i.e. the signal of 802.11 protocol requirements) of frequency greater than the high band of 860MHz, form first signal, send to duplexing blender 202.On the other hand, the CATV light signal that optical receiver 2011 receives from HFC optical-fiber network side is by sending to duplexing blender 202 after radio frequency amplifier 2012 amplifications.
Step 402: duplexing blender 202 will adopt mode modes such as (or) time division multiplexinges of frequency division multiplexing to mix from the data radiofrequency signal of the high band of data insertion equipment 2014 with from the CATV radiofrequency signal of the low-frequency range of radio frequency amplifier 2012, form secondary signal, send to the coaxial distribution network side 108 of HFC; Be sent to corresponding splitter 109 by the coaxial distribution network side 108 of HFC.
Step 403: splitter 109 is isolated the CATV signal of high band data carried by data radiofrequency signal and low-frequency range carrying from the secondary signal that receives, send to TV and terminal access device 203 respectively.
Step 404: the data radiofrequency signal that terminal access device 203 receives from splitter 109, carry out 802.11 to 802.3 protocol conversion, the data radiofrequency signal is converted to the data-signal of 802.3 protocol requirements, send data equipments such as user's computer to by USB mouth or the Ethernet interface that links to each other with data equipments such as computers, finished the downlink transfer of data.
Data upstream transmission as shown in Figure 5 (promptly being transferred to the network side direction from user side) flow chart may further comprise the steps:
Step 501: data equipments such as user side computer pass through 802.3 agreements with data-signal, send to terminal access device 203,203 pairs of data of terminal access device are carried out 802.3 to 802.11 protocol conversion, data signal modulation is become the data radiofrequency signal (i.e. the signal of 802.11 protocol requirements) of frequency greater than the high band of 860MHz, form the 3rd signal, send to splitter 109.
Step 502: splitter 109 adopts mode modes such as (or) time division multiplexinges of frequency division multiplexing to be mixed in the high band of upward signal the data radiofrequency signal of high band, mixed upward signal is called the 4th signal herein, sends to the coaxial distribution network side 108 of HFC.
Step 503: duplexing blender 202 receives the 4th up signal from the coaxial distribution network side 108 of HFC, and demultiplexing goes out high-frequency signal data carried by data radiofrequency signal from this signal, and is transferred to data insertion equipment 2014.
Step 504: data insertion equipment 2014 is finished 802.11 to 802.3 protocol conversion, be about to the data radiofrequency signal and be converted to the Ethernet data signals transmitted, after converging by Ethernet switch 2013 again, deliver to IP metropolitan area network relevant device and carry out three layers of exchange, the process particular way is by being sent to the internet.
By above scheme, as can be seen, the present invention does not need to change the HFC optical-fiber network side of CATV, directly utilizes the coaxial distribution network of HFC of catv network to realize the user by the catv network broadband access, and with respect to the broadband access implementation method of background technology, cost is low.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1, a kind of system that realizes broadband access at cable TV on the net, this cable television network comprises HFC optical-fiber network side (107) and the coaxial distribution network side of HFC (108), it is characterized in that, this system comprises: comprehensively converge light-gathering station (201), duplexing blender (202), splitter (109), terminal access device (203), wherein
The comprehensive light-gathering station (201) that converges links to each other with HFC optical-fiber network side (107), IP metropolitan area network, duplexing blender (202) respectively, being used for will be from the CATV light signal of HFC optical-fiber network side (107), be converted to the CATV radiofrequency signal respectively and the data radiofrequency signal sends to duplexing blender (202) from the data-signal of IP metropolitan area network, and will be converted to data-signal from the data radiofrequency signal of duplexing blender (202) and send to the IP metropolitan area network;
Duplex blender (202), link to each other with splitter (109) by the coaxial distribution network side of HFC (108), be used for will from the CATV radiofrequency signal of comprehensive remittance light-gathering station (201) and data radiofrequency signal carry out multiplexing after, send to splitter (109), and the signal demultiplexing that splitter (109) is uploaded is gone out the data radiofrequency signal send to comprehensive remittance light-gathering station (201);
Splitter (109) links to each other with terminal access device (203), be used for to go out the data radiofrequency signal from the signal demultiplexing of duplexing blender (202) and send terminal access device (203) to, and in the future the data radiofrequency signal of self terminal access device (203) is multiplexed into and sends to duplexing blender (202) in the upward signal;
Terminal access device (203) is used to realize the conversion of data radiofrequency signal and data-signal.
2, the system as claimed in claim 1 is characterized in that, described comprehensive remittance light-gathering station (201) comprising: optical receiver (2011), radio frequency amplifier (2012), Ethernet switch (2013) and data insertion equipment (2014); Wherein,
Optical receiver (2011) and radio frequency amplifier (2012), link to each other with outside HFC optical-fiber network side (107), be used for will reception the CATV light signal, be converted to the CATV radiofrequency signal and send to radio frequency amplifier;
Radio frequency amplifier (2012) is used for the CATV radiofrequency signal that receives is amplified, and exports to outside duplexing blender (202);
Ethernet switch (2013) is used to realize the forwarding of data-signal between data insertion equipment (2014) and IP metropolitan area network with data insertion equipment (2014), link to each other with described IP metropolitan area network;
Data insertion equipment (2014) also links to each other with the duplexing blender in outside (202), is used to realize the conversion of data-signal and data radiofrequency signal.
3, system as claimed in claim 2, it is characterized in that, described data insertion equipment (2014) comprising: radio frequency interface unit, Transmit Receive Unit, base band and MAC processing unit, main CPU unit, Ethernet Transmit-Receive Unit and Ethernet interface unit, and described each unit connects successively; Wherein,
Transmit Receive Unit and radio frequency interface unit are realized the reception and the transmission of data radiofrequency signal jointly;
Base band and MAC processing unit are used to realize to the physical layer of data radiofrequency signal and the processing of MAC layer;
Main CPU unit is used to realize the conversion of data-signal and data radiofrequency signal form, reaches the control to base band and MAC processing unit;
Ethernet Transmit-Receive Unit and Ethernet interface unit are realized the reception and the transmission of data-signal jointly.
4, a kind of method that realizes broadband access at cable TV on the net, this cable television network comprises HFC optical-fiber network side (107) and the coaxial distribution network side of HFC (108), broadband access system comprises comprehensive remittance light-gathering station (201), duplexing blender (202), splitter (109), terminal access device (203), described broad band access method comprises the downlink transfer and the uplink of data, wherein
The downlink transfer of data comprises step:
Comprehensive remittance light-gathering station (201) receives the data-signal from the IP metropolitan area network, is converted to the data radiofrequency signal and sends to duplexing blender (202);
Duplex blender (202) is multiplexed into the data radiofrequency signal that receives in the descending radiofrequency signal, sends splitter (109) to by the coaxial distribution network side of HFC (108);
Splitter (109) goes out the data radiofrequency signal with the radiofrequency signal demultiplexing that receives and sends to terminal access device (203);
Terminal access device (203) is converted to data-signal with the data radiofrequency signal and sends to the user data terminal equipment;
The uplink of data comprises step:
Terminal access device (203) will be converted to the data radiofrequency signal from the data-signal of user data terminal equipment and send to splitter (109);
Splitter (109) is multiplexed into the data radiofrequency signal that receives in the up radiofrequency signal, sends to duplexing blender (202) by the coaxial distribution network side of HFC (108);
The up radiofrequency signal demultiplexing that duplex blender (202) will receive goes out the data radiofrequency signal and sends to comprehensive remittance light-gathering station (201);
Comprehensive remittance light-gathering station (201) will be converted to data-signal and send to the IP metropolitan area network from the data radiofrequency signal of duplexing blender (202).
5, method as claimed in claim 4 is characterized in that, described data radiofrequency signal is the radiofrequency signal greater than 860MHz.
6, method as claimed in claim 4 is characterized in that, described data-signal is the lan protocol signal, and described data radiofrequency signal is the WLAN protocol signal.
7, method as claimed in claim 6 is characterized in that, described lan protocol comprises the IEEE802.3 agreement; Described WLAN agreement comprises IEEE802.11a, IEEE802.11b or IEEE 802.11g agreement.
8, method as claimed in claim 4 is characterized in that, described frequency division multiplexing or the time division multiplexing of being multiplexed with.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310103992 CN1615013A (en) | 2003-11-05 | 2003-11-05 | System for realizing wideband inserting in wireless Tv-set network |
| CN200310103992.2 | 2003-11-05 | ||
| PCT/CN2004/001256 WO2005046129A1 (en) | 2003-11-05 | 2004-11-04 | A system and access method for achieving broadband access in the cable television network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1799223A CN1799223A (en) | 2006-07-05 |
| CN100345421C true CN100345421C (en) | 2007-10-24 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310103992 Pending CN1615013A (en) | 2003-11-05 | 2003-11-05 | System for realizing wideband inserting in wireless Tv-set network |
| CNB2004800150003A Expired - Fee Related CN100345421C (en) | 2003-11-05 | 2004-11-04 | Broadband access system and access method implemented on cable TV network |
Family Applications Before (1)
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| CN 200310103992 Pending CN1615013A (en) | 2003-11-05 | 2003-11-05 | System for realizing wideband inserting in wireless Tv-set network |
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| CN (2) | CN1615013A (en) |
| WO (1) | WO2005046129A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100499464C (en) * | 2006-07-11 | 2009-06-10 | 杭州华三通信技术有限公司 | Ethernet receiving and transmission device based on TV coaxial line |
| CN101123695B (en) * | 2006-08-07 | 2010-12-15 | 石方太 | Wired TV network 'narrow band home access' transmission method |
| CN101146213B (en) * | 2006-09-11 | 2010-05-12 | 思华科技（上海）有限公司 | VoD network and ordering method |
| CN101075825A (en) * | 2007-06-27 | 2007-11-21 | 顾士平 | Hybrid-access wide band network of CATV power line |
| CN101166081B (en) * | 2007-08-30 | 2010-08-18 | 杭州华三通信技术有限公司 | A method, system and device for detecting link polarity |
| CN101494804B (en) * | 2009-03-03 | 2011-06-15 | 天栢宽带网络科技（上海）有限公司 | Wired network bidirectional reconstruction system compatible with wideband and narrowband |
| CN102035704B (en) * | 2010-12-27 | 2012-07-11 | 甘静 | Wideband access system based on HFC (Hybrid Fiber Coaxial) network |
| EP2523357B1 (en) * | 2011-05-12 | 2013-09-18 | Siemens Aktiengesellschaft | Subsea data communication system and method |
| CN103220194A (en) * | 2012-01-19 | 2013-07-24 | 上海未来宽带技术股份有限公司 | HiNOC equipment and implementation method thereof |
| CN103338138B (en) * | 2013-05-31 | 2016-04-20 | 武汉市天晨翔云数据有限公司 | The method for channel allocation of optical-power broadband access system and this system |
| CN104394047A (en) * | 2014-10-30 | 2015-03-04 | 成都康特电子高新科技有限责任公司 | High-definition bidirectional HFC (Hybrid Fiber Coaxial) system based on broadcast television network |
| CN104539491A (en) * | 2014-10-30 | 2015-04-22 | 成都康特电子高新科技有限责任公司 | Bilateral HFC (Hybrid Fiber Coax) system based on broadcast television network |
| CN109308011A (en) * | 2017-07-26 | 2019-02-05 | 美的智慧家居科技有限公司 | The distribution method, apparatus and smart home device of smart home device |
| CN108234300B (en) * | 2018-02-26 | 2024-03-29 | 深圳市新龙鹏科技有限公司 | CATV+PON+EoC technology home gateway and implementation method thereof |
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| 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 |
| CN1315789A (en) * | 2000-03-27 | 2001-10-03 | 四川诺尔实业(集团)有限公司 | Broad-band full-service integrated network access method |
| KR20030007341A (en) * | 2002-12-18 | 2003-01-23 | 주식회사 넷웨이브 | System for Managing a HFC Network |
| CN1398087A (en) * | 2001-07-12 | 2003-02-19 | 深圳市中兴通讯股份有限公司上海第二研究所 | Broad-band access system for MAN |
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| CN1268003A (en) * | 2000-05-15 | 2000-09-27 | 张小频 | Wireless backing high-speed cut-in network utilizing monoway cable TV coaxial network as platform |
| CN1445995A (en) * | 2002-03-18 | 2003-10-01 | 丁兆明 | Voice, data, video frequency transmission system based on cable TV network |
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2003
- 2003-11-05 CN CN 200310103992 patent/CN1615013A/en active Pending
-
2004
- 2004-11-04 CN CNB2004800150003A patent/CN100345421C/en not_active Expired - Fee Related
- 2004-11-04 WO PCT/CN2004/001256 patent/WO2005046129A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN1315789A (en) * | 2000-03-27 | 2001-10-03 | 四川诺尔实业(集团)有限公司 | Broad-band full-service integrated network access method |
| CN1398087A (en) * | 2001-07-12 | 2003-02-19 | 深圳市中兴通讯股份有限公司上海第二研究所 | Broad-band access system for MAN |
| KR20030007341A (en) * | 2002-12-18 | 2003-01-23 | 주식회사 넷웨이브 | System for Managing a HFC Network |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1615013A (en) | 2005-05-11 |
| WO2005046129A1 (en) | 2005-05-19 |
| CN1799223A (en) | 2006-07-05 |
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