CN201533369U - Ethernet user end access device suitable for coaxial cable - Google Patents
Ethernet user end access device suitable for coaxial cable Download PDFInfo
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- CN201533369U CN201533369U CN2009200716054U CN200920071605U CN201533369U CN 201533369 U CN201533369 U CN 201533369U CN 2009200716054 U CN2009200716054 U CN 2009200716054U CN 200920071605 U CN200920071605 U CN 200920071605U CN 201533369 U CN201533369 U CN 201533369U
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Abstract
The utility model discloses an Ethernet user end access device suitable for a coaxial cable, which comprises a pair of coaxial data transceivers, a RJ-45 and four power supply interfaces. A 12V direct current power supply supplies power for the Ethernet user end access device. The inner portion of the device is provided with a duplex filter, which is used to complete the separation from cable television data and internet data, signals after separating are respectively connected to user televisions and computers by a coaxial port and a RJ-45 interface, thereby achieving the broadband access solution that a coaxial cable transfers cable television signals and Ethernet data signals at the same time. The inner portion of the device is provided with two physical layer chips which are a EOC-PHY and a FE-PHY and have the access speed of 20-100Mb/s, the device uses a novel transmission coding technology, and achieves 20-100Mb/s broadband access speed in 5-65MHz frequency band. The device uses an IEEE802.3ah media access control protocol, the transmission work of downlink and uplink signals are completed on a same frequency band, and the downlink and uplink communication use a time division duplex mode.
Description
Technical field:
The utility model belongs to the technical field of wide band multi-business Access Network, be particularly related to a kind of being applicable to and utilize coaxial cable interface to receive cable TV signal and broadband access data service signal simultaneously, and the network user end access device that provides cable TV signal and broadband ether data-signal to user's TV receiving apparatus and PC.
Background technology:
Present national cable TV industry is being carried out the overall digital transformation.Cable television digitalization will make the business of whole cable TV, operation mode have a revolutionary change, by the one-way video business to the data of two-way interactive, look, the development of audio frequency integrated service.And have only the new business of development, new service be provided, for the user creates new value, just can make whole conversion obtain real success.
And new business and new operation mode have proposed new requirement to network, and the most concentrated embodiment is exactly to require the network realization two-way.Along with advancing by leaps and bounds of informatization, the release of multiple business such as high speed Internet access, high definition/SD, broadcasting, IPTV, VOD, VOIP, people are vigorous day by day for the demand of multimedia communications such as data, voice, image.Therefore the development trend of user's Access Network is broadband, two-way, multi-service.The main path that realizes broadband access is the twisted-pair wire net of telecommunications, the Ethernet and the cable television network of franchise data service, and the PON technology that is developing.On development trend, it is development models of Access Network from now on that ether media access control layer data protocol is worked in various physical layer networks.And the good and bad success or failure of the technology of cable television network bidirectional rebuilding are and the competitions of technology on performance and price such as ADSL.Therefore research and develop the key that the new technology with competitiveness and development prospect is cable television network bi-directional data transformation success.
At present, mainly contain in existing bidirectional rebuilding technology
(1) CMTS is a Cable Modem technology.Be the technology that current cable distributes the transformation of two-wayization of Access Network to adopt the earliest, Cable Modem technology has at home and abroad all obtained using widely.The major technique shortcoming of CMTS is the restriction that is subjected to bandwidth and noise, has caused improved network insertion rate not high.
(2) passive EOC technology.Passive EOC (Ethernet over Coax) is based on the cable tv coax net, uses the access technology of Ethernet protocol.Near user's corridor, adopt specific medium switch technology that the ether data-signal is transmitted by coaxial cable, insert in the user family.Its principle is the passive EOC transmission technology, and basic principle is: utilize cable TV signal in 111～860MHz frequency transmission, base-band data signal is in the characteristic of 0～20MHz frequency transmission, can make both transmit in a coaxial cable and be independent of each other.TV signal and data-signal are passed through mixer, utilize cable TV network to deliver to the user.At user side, by separator TV signal and data-signal are separated, insert corresponding terminal device.The major defect of passive EOC is that the distribution network of registering one's residence in the building must need to adopt star-like centralized distribution pattern, is point-to-point (P2P), tree type (P2MP) network topology structure of incompatibility most existing cable TV.
(3) active EOC technology.Present active modulation EOC technical basis modulation system and working frequency range different and different mainly contain the HomePlug technology: the frequency range below 30MHz, utilize the broadband technology of the MAC layer realization power line communications of OFDM physical layer and 802.3.Next is the HomePNA technology: this is to use a kind of home network technologies on telephone wire, and its 3.0 version also expands to one of its carrier to coaxial cable, and the frequency range of employing is also at low frequency end.The 3rd is that the carrier frequency of MoCA technology: MoCA is separated with the frequency of former broadcasting and TV, is from 800MHz to 1500MHz, and its each frequency range 50MHz can support 31 users or 62 users, shares the band width in physical up to 270M.The 4th is WiFi overCoax: this technology adopts 802.11b, with wireless high band 2.5GHz carrier wave, moves the 750-950MHz frequency range of coax, takies the 20MHz frequency range, can be the physical layer rate that the user provides 108Mpbs.
By above-mentioned analysis, HomePlug, HomePNA and WiFi technology are to carry out the integral shift method from the former protocols having of original power line transmission, telephone wire transmission and Radio Transmission Technology, move the relevant frequency range of coax.Though and the MoCA technology is the technology of developing at coaxial cable specially; but because the same MAC agreement that has all adopted CSMA with previous technique; the bandwidth of each CPE (Customer PremiseEquipment) is gone free competition as HUB; bandwidth does not guarantee, can not adapt to the appropriate scale of operation of network.
These technology all need be placed the customer access equipment of a corresponding technology at user side---be commonly called as set-top box, realize the modulation and demodulation of descending reception and up transmission signal.Access interface aspect on the existing set-top box needs two kinds of interfaces, and an interface is a data-interface, and one is radio frequency interface, is not suitable for adopting coaxial cable to transmit the requirement of cable TV signal and the Internet signal simultaneously.Can receive cable TV signal and the Internet signal simultaneously as if set-top box design is become, be connected to television set and personal computer respectively, and can guarantee bandwidth at a high speed, must solve following problem technically:
1) realizes high speed low bit error data transmit-receive,, guarantee and the terminal proper communication reasonably with other user's shared bandwidths;
2) realize separating of data-signal and cable TV signal, and filter out noise;
3) realize that point transmits to the wide-band bidirectional data of multiple spot (P2MP) coaxial cable net, finishes multi-user's wide-band bidirectional service dispatching.
The utility model promptly is a kind of user's set-top box device based on novel active baseband transmission mode of realizing in line with effectively addressing the above problem.
The utility model content:
The purpose of this utility model is to provide a kind of suitable coaxial cable to transmit the user side access device of cable TV signal and baseband data signals simultaneously, make full use of existing cable TV network, convenient cable TV subscriber's the high-speed data of realizing economically inserts.
The purpose of this utility model is achieved through the following technical solutions:
A kind of ethernet user's termination of coaxial cable that is applicable to is gone into equipment, and this equipment comprises MAC control chip, first physical chip (EOC-PHY), second physical chip (FE-PHY), duplexer filter, coaxial data transmit-receive port, cable TV port, RJ-45 interface and power supply supply interface; It is characterized in that,
Described first physical chip (EOC-PHY) is used to handle the data-signal by coaxial transmission, by the transfer encoding technology, realizes user's access rate of 20～100Mb/s;
Described second physical chip (FE-PHY) is used to receive and dispatch treated Ethernet data, and according to the instruction that the MAC control chip sends, is used for process data signal, and realizes the transmission and the reception of the time division duplex of uplink and downlink signals;
Described MAC control chip inserts request according to the user, realizes road Control on Communication and symmetry or asymmetric dynamic allocated bandwidth up and down, is responsible for sending control signal simultaneously, controls first physical chip and second physical chip and realizes that the TDD of data receives and sends;
Described coaxial data transmit-receive port is responsible for being connected cable TV network and duplexer filter with the cable TV port, receives the data from cable TV network; Coaxial data transmit-receive port is responsible for receiving the downstream signal from coaxial network, provides cable TV signal by the cable TV port for user's television set after going out coherent signal by the duplexer filter filtering; To upward signal, coaxial data transmit-receive port is responsible for subscriber signal is uploaded to the headend equipment of coaxial network, realizes the data passback of user side;
Described RJ-45 interface provides baseband data signals output according to the data processing of second physical chip (FE-PHY) for subscriber computer.
In the said equipment, described power supply is supplied with interface and is given power devices by the 12V/5V DC power supply.
In the said equipment, described duplexer filter is used for the noise signal of filtering less than 5MHz, realizes separating of cable TV signal and data-signal simultaneously, and the data-signal frequency band after the separation is 5～65MHz, and the cable TV signal frequency band is 88～860MHz; And the cable TV signal after will separating is connected to television set by coaxial data sending terminal mouth.
In the said equipment, the MAC control chip sends control signal to first physical chip and second physical chip, controls transmission and reception that this two chip block is finished uplink and downlink signals; And by with the communicating by letter of headend equipment, realize with the sequential of front end synchronously, and forward end equipment sends functions such as bandwidth request.
In the said equipment, the MAC control chip adopts the IEEE802.3ah media access control protocol, and uplink and downlink signals transmits and is operated in identical frequency band, and uplink and downlink communication adopts the TDD---time division duplex; Described MAC control chip adopts the MPCP control information of IEEE802.3ah, realizes the dynamic bandwidth STDMA allocated bandwidth of up channel.
In the said equipment, support weighted fair queuing (wfq) on the described device transmission mechanism, permission distributes bandwidth on variable basis, a plurality of user terminal access devices can obtain enough bandwidth simultaneously and under the scheduling and management of front-end control facilities, realize that wideband data safe and reliable and that have QoS to ensure inserts; And only transmit data on the data feedback channel of user terminal and front end, TV signal is unidirectional receiving mode.
Utilize user side access device of the present utility model, cooperate the control appliance of front end, can make full use of existing cable TV coaxial net, realize that high performance cheaply broadband P 2MP inserts.
Description of drawings:
Further specify the utility model below in conjunction with the drawings and specific embodiments.
The user side access device structural principle schematic diagram that Fig. 1 implements for the utility model.
Fig. 2 is the physical chip of the utility model enforcement and the data flow between the MAC layer chip.
Embodiment:
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Referring to following specific embodiment:
As shown in Figure 1, the utility model equipment adopts the 12V/5V DC power supply to power to entire equipment by power supply supply interface 4.Coaxial Data Receiving port 1 is responsible for connecting cable TV network and duplexer filter, reception is from the data of cable TV network, cable TV signal after duplexer filter 2 is incited somebody to action along separate routes is connected to television set through coaxial data sending terminal mouth 7 (also claiming the TV signal interface) output, and the Internet signal is sent to respectively in first physical chip (EOC-PHY) 8, deliver in the MAC control chip 3 by the processing of first physical chip (EOC-PHY) 8, second physical chip (FE-PHY) 5 is exported the Internet signal according to the indication of MAC control chip 3 by RJ-45 interface 6, be connected to personal computer.Upward signal is finished the coding and the encryption of ethernet signal by physical layer under the scheduling of MAC control chip 3, convert coaxial signal to after coaxial Data Receiving port 1 sends.
Referring to Fig. 2, be illustrated as the data flow between the physical chip and MAC layer chip in the utility model equipment.
(1) reception of user data and transmission: this ustomer premises access equipment links to each other with cable TV network by coaxial interface (coaxial data transmit-receive port), the same axis data that receives is at first through a duplexer filter 2, with radio frequency low side data-signal and cable TV data separating, cable TV signal directly is connected to television set by the TV signal interface, data-signal is sent to first physical chip (EOC-PHY), 8 places, physical chip is according to the control signal of MAC control chip 3, finish acceptance, and be connected to user computer via RJ-45 interface 6 with axis data; User's uplink data sending, by RJ-45 interface 6 to second physical chips (FE-PHY) 5, this physical chip is finished coding and encryption, the signal level conversion etc. of ethernet signal, and realizes the control signal of signal according to MAC control chip 3, finishes the transmission of uplink user data.
(2) reception and the transmission of MAC layer chip controls signal: MAC layer chip output control signal is directly controlled the transmitting-receiving that physical chip carries out data.The MAC layer can by with the communicating by letter of terminal control chip, realize with the sequential of front end synchronously, and forward end sends functions such as bandwidth request.The MAC control chip adopts the IEEE802.3ah media access control protocol, and uplink and downlink signals transmits and is operated in identical frequency band, and uplink and downlink communication adopts the TDD---time division duplex.Adopt the MPCP control information of IEEE802.3ah, support weighted fair queuing (wfq) on the transmission mechanism, support the Dynamic Bandwidth Allocation (STDMA) of up channel.A plurality of user terminal access devices can obtain enough bandwidth simultaneously and under the scheduling and management of front-end control facilities, realize that wideband data safe and reliable and that have QoS to ensure inserts.
Data-interface recited above generally adopts the RJ45 interface, and at the data receiver of specific (special) requirements, also can adopt the data-interface of other structure.In addition, supply voltage also has alternative, and another kind of 5V power supply commonly used is also in the design limit of consideration.
More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (6)
1. the ethernet user's termination that is applicable to coaxial cable is gone into equipment, and this equipment comprises MAC control chip, first physical chip (EOC-PHY), second physical chip (FE-PHY), duplexer filter, coaxial data transmit-receive port, cable TV port, RJ-45 interface and power supply supply interface; It is characterized in that,
Described first physical chip (EOC-PHY) is used to handle the data-signal by coaxial transmission, by the transfer encoding technology, realizes user's access rate of 20～100Mb/s;
Described second physical chip (FE-PHY) is used to receive and dispatch treated Ethernet data, and according to the instruction that the MAC control chip sends, is used for process data signal, and realizes the transmission and the reception of the time division duplex of uplink and downlink signals;
Described MAC control chip inserts request according to the user, realizes road Control on Communication and symmetry or asymmetric dynamic allocated bandwidth up and down, is responsible for sending control signal simultaneously, controls first physical chip and second physical chip and realizes that the TDD of data receives and sends;
Described coaxial data transmit-receive port is responsible for being connected cable TV network and duplexer filter with the cable TV port, receives the data from cable TV network; Coaxial data transmit-receive port is responsible for receiving the downstream signal from coaxial network, provides cable TV signal by the cable TV port for user's television set after going out coherent signal by the duplexer filter filtering; To upward signal, coaxial data transmit-receive port is responsible for subscriber signal is uploaded to the headend equipment of coaxial network, realizes the data passback of user side;
Described RJ-45 interface provides baseband data signals output according to the data processing of second physical chip (FE-PHY) for subscriber computer.
2. go into equipment according to ethernet user's termination of claim 1, it is characterized in that, described power supply is supplied with interface and is given power devices by 12V or 5V DC power supply.
3. go into equipment according to ethernet user's termination of claim 1, it is characterized in that, described duplexer filter is used for the noise signal of filtering less than 5MHz, realize separating of cable TV signal and data-signal simultaneously, data-signal frequency band after the separation is 5～65MHz, and the cable TV signal frequency band is 88～860MHz; And the cable TV signal after will separating is connected to television set by the cable TV port.
4. go into equipment according to ethernet user's termination of claim 1, it is characterized in that, described MAC control chip sends control signal to first physical chip and second physical chip, controls transmission and reception that this two chip block is finished uplink and downlink signals; And by with the communicating by letter of headend equipment, realize with the sequential of front end synchronously, and forward end equipment sends functions such as bandwidth request.
5. go into equipment according to ethernet user's termination of claim 1, it is characterized in that, described MAC control chip adopts the IEEE802.3ah media access control protocol, and uplink and downlink signals transmits and is operated in identical frequency band, and uplink and downlink communication adopts the TDD time division duplex; Described MAC control chip adopts the MPCP control information of IEEE802.3ah, realizes the dynamic bandwidth STDMA allocated bandwidth of up channel.
6. go into equipment according to ethernet user's termination of claim 1, it is characterized in that, support Weighted Fair Queuing on the described device transmission mechanism, permission distributes bandwidth on variable basis, a plurality of user terminal access devices can obtain enough bandwidth simultaneously and under the scheduling and management of front-end control facilities, realize that wideband data safe and reliable and that have QoS to ensure inserts; And only transmit data on the data feedback channel of user terminal and front end, TV signal is unidirectional receiving mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009200716054U CN201533369U (en) | 2009-05-05 | 2009-05-05 | Ethernet user end access device suitable for coaxial cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200716054U CN201533369U (en) | 2009-05-05 | 2009-05-05 | Ethernet user end access device suitable for coaxial cable |
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| CN201533369U true CN201533369U (en) | 2010-07-21 |
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| CN2009200716054U Expired - Fee Related CN201533369U (en) | 2009-05-05 | 2009-05-05 | Ethernet user end access device suitable for coaxial cable |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244596A (en) * | 2011-06-24 | 2011-11-16 | 武汉长光科技有限公司 | Active relay based on EOC |
| CN102480400A (en) * | 2010-11-30 | 2012-05-30 | 康佳集团股份有限公司 | Three-network combination system and digital home terminal |
| CN102820906A (en) * | 2012-08-24 | 2012-12-12 | 苏州云普通讯技术有限公司 | Trunk equipment suitable for coaxial access of point-to-multipoint broadband |
| CN102932211A (en) * | 2012-08-29 | 2013-02-13 | 苏州云普通讯技术有限公司 | Outdoor over-current local side equipment suitable for broadband coaxial access |
| CN103117908A (en) * | 2012-08-24 | 2013-05-22 | 苏州云普通讯技术有限公司 | Office-end device suitable for coaxial broadband service multi-business access |
| CN104584470A (en) * | 2012-08-10 | 2015-04-29 | 熵敏通讯公司 | Time division duplexing for epoc |
| CN106572318A (en) * | 2016-10-19 | 2017-04-19 | 深圳市茁壮网络股份有限公司 | Cable television network fiber signal processing device and processing method |
| US10348390B2 (en) | 2013-12-12 | 2019-07-09 | Huawei Technologies Co., Ltd. | Backhaul device and backhaul device control method |
| CN111585850A (en) * | 2020-04-09 | 2020-08-25 | 北京瀚诺半导体科技有限公司 | HINOC channel binding method, chip and equipment |
-
2009
- 2009-05-05 CN CN2009200716054U patent/CN201533369U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102480400A (en) * | 2010-11-30 | 2012-05-30 | 康佳集团股份有限公司 | Three-network combination system and digital home terminal |
| CN102480400B (en) * | 2010-11-30 | 2015-12-09 | 康佳集团股份有限公司 | A kind of three-network integration system and digital home terminal |
| CN102244596A (en) * | 2011-06-24 | 2011-11-16 | 武汉长光科技有限公司 | Active relay based on EOC |
| CN102244596B (en) * | 2011-06-24 | 2013-11-27 | 武汉长光科技有限公司 | Active relay based on EOC |
| CN104584470A (en) * | 2012-08-10 | 2015-04-29 | 熵敏通讯公司 | Time division duplexing for epoc |
| CN102820906A (en) * | 2012-08-24 | 2012-12-12 | 苏州云普通讯技术有限公司 | Trunk equipment suitable for coaxial access of point-to-multipoint broadband |
| CN103117908A (en) * | 2012-08-24 | 2013-05-22 | 苏州云普通讯技术有限公司 | Office-end device suitable for coaxial broadband service multi-business access |
| CN102932211A (en) * | 2012-08-29 | 2013-02-13 | 苏州云普通讯技术有限公司 | Outdoor over-current local side equipment suitable for broadband coaxial access |
| US10348390B2 (en) | 2013-12-12 | 2019-07-09 | Huawei Technologies Co., Ltd. | Backhaul device and backhaul device control method |
| CN106572318A (en) * | 2016-10-19 | 2017-04-19 | 深圳市茁壮网络股份有限公司 | Cable television network fiber signal processing device and processing method |
| CN111585850A (en) * | 2020-04-09 | 2020-08-25 | 北京瀚诺半导体科技有限公司 | HINOC channel binding method, chip and equipment |
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Address after: 201700, No. 7888, Pine Road, Qingpu District, Shanghai, 101-B21 Patentee after: Online Technology Co., Ltd. Address before: 201700, No. 7888, Pine Road, Qingpu District, Shanghai, 101-B21 Patentee before: Shanghai Onlan Communication Technology Co., Ltd. |
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Inventor after: Xu Yingjiang Inventor after: Huang Peng Inventor after: He Ping Inventor after: Gao Kangyan Inventor after: Pan Zhihao Inventor after: Ying Kejie Inventor after: Wang Chunhua Inventor after: Xu Jian Inventor after: Li Li Inventor after: Zheng Rong Inventor after: You Song Inventor after: Shen Yi Inventor before: Xu Yingjiang Inventor before: Huang Peng Inventor before: He Ping Inventor before: Gao Kangyan Inventor before: Pan Zhihao Inventor before: Ying Kejie Inventor before: Wang Chunhua Inventor before: Xu Jian Inventor before: Li Li Inventor before: Zheng Rong Inventor before: You Song Inventor before: Shen Yi |
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