CN103929314A - Multi-mode access novel EOC device - Google Patents
Multi-mode access novel EOC device Download PDFInfo
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- CN103929314A CN103929314A CN201310010634.0A CN201310010634A CN103929314A CN 103929314 A CN103929314 A CN 103929314A CN 201310010634 A CN201310010634 A CN 201310010634A CN 103929314 A CN103929314 A CN 103929314A
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Abstract
The invention discloses a multi-mode access novel EOC device which is a new device further developed on the basis of a conventional point-to-point low frequency modulated EOC device. The multi-mode access novel EOC device comprises a central office end device and a user terminal device connected with the central office end device through a coaxial cable. The central office end device comprises a wireless signal and CATV cable television signal combiner unit, and a wireless signal and CATV cable television combination signal and modulated Ethernet data signal combiner unit. The combination signals of already modulated Ethernet data signals, wireless signals and cable television signals are mixed and then are output through the coaxial cable, multi-service transmission and global management and control can be simultaneously realized, the device is used for simultaneous access of network data signals, the cable television signals and the wireless signals, indoor coverage of the wireless signals is realized, and the functions of networking, TV watching and the like on cable television network broadband are achieved.
Description
Technical field
The present invention relates to the connecting system that a kind of wireless signal covers, especially a kind of and EOC equipment combines and utilizes CATV coaxial cable to realize the degree of depth covering system that wireless signal enters building or registers one's residence.
Background technology
China Mobile's number of users is in continuous increase, and the latest digital disclosing according to domestic San great operator, end in January, 2012, and Chinese number of mobile phone users has reached 9.8758 hundred million, is about to approach 1,000,000,000 high pointes.More and more along with mobile subscriber's quick increase and skyscraper, community, hotel, office building, traffic density and coverage requirement also constantly rise.The a large amount of construction materials such as armored concrete that use of these buildings, have very strong shielding action to mobile telephone signal.Under the environment such as the low layer of building, underground parking, a little less than mobile communication signal, mobile phone cannot normally use, and has formed blind area and the shadow region of mobile communication; Intermediate floor may be because overlapping from different base station signal around produces ping-pong, and frequent switching even goes offline, and has had a strong impact on the normal use of mobile phone.In traffic hot spot regions such as office buildings, the large channel of user density is crowded in addition, and the mobile phone difficulty of reaching the standard grade forms Liao Mang district.
In order to address the above problem, need to solve mobile communication signal Ru building and the problem of registering one's residence.Current normally used indoor covering system is comprised of information source, RF cable, RF power division device, distribution antenna.Information source can be mounted in indoor microcell base station, micromicro honeycomb base station or the signal of the outdoor macro honeycomb introduced by repeater, and RF power division device is RF power divider, power combiner device, power coupler etc.The signal of signal source is sent to the signal distributing point of each floor by the main cable being connected with base station radio-frequency delivery outlet.The signal that guarantees each floor signal distributing point by the RF power coupler with different coupling ratios is substantially equal.Distribution antenna is distributed in suitable position in floor, and radiofrequency signal at signal distributing point by power division device along separate routes, and is launched covering chamber's inner region by transmit by RF cable to distribution antenna.This normally used mobile communication signal indoor covering method need to be laid special radio frequency coaxial-cable in building, this normally used movable signal indoor covering methods of radio frequency passive device such as a large amount of special power splitters, mixer, coupler, antenna are installed and need to be laid special cable at interior of building, a large amount of power devices is installed, quantities is large, constructional difficulties, cost is high.So if mobile operator carries out separately cable laying, invest large and constructional difficulties, be very unpractical.
The existing cable TV network hfc plant of China is the cable TV network of userbase maximum in the world, and Broadcast and TV system has the abundant cable resource of registering one's residence.At present, in the building of most cities, particularly in house, catv network is very universal, and CATV coaxial cable has been routed in the room of each resident family substantially.Be accompanied by the propelling of integration of three networks process, China's policy promotes cable television digital and Two-way Reconstruction in CATV Network work starts comprehensively.
Coaxial cable, as the resource of cable TV network, has high bandwidth, broadband and good noise suppression feature, simultaneously transmission of digital, voice, image and wireless signal.Existing EOC equipment has only been used low frequency spectrum scope at present, mobile radio signal belongs to medium-high frequency signal, without carrying out band modulation, can directly in coaxial cable, transmit, be a kind of low cost, high performance solution so utilize CATV coaxial cable transmission mobile communication signal.
Summary of the invention
A little less than the present invention is intended to solve mobile communication signal indoor signal, the problem of the aspects such as indoor distributed system cabling is difficult, great in constructing amount, project cost is high, providing a kind of combines and utilizes CATV coaxial cable to realize the degree of depth covering system that wireless signal enters building or registers one's residence with EOC equipment, can realize transmission and the covering of multiple wireless signal, solve the covering problem of operator's signal of communication, the difficult problem of registering one's residence, has improved corridor or indoor network coverage quality.Engineering construction is simpler, and cost is low, suits large area to popularize.
According to the solution of the present invention, on the basis of point-to-point low frequency modulations EOC, provide a kind of new equipment, for realize the deep covering that mobile radiotelephone signal enters building or registers one's residence by CATV coaxial cable.This equipment comprises local side apparatus and passes through the coupled a plurality of subscriber terminal equipments of coaxial cable.Local side apparatus is arranged in corridor light current well, and ustomer premises access equipment is placed in building inner room or in user family.Described mobile communication signal is CDMA, GSM, DCS, WCDMA, TD-SCDMA, PHS wireless mobile communications signal, can be also WLAN wireless signal.
Local side apparatus comprises: wireless signal and CATV signal close road and allocation units, Ethernet data signal data crosspoint and modem module, multi-signal combiner unit.
Local side apparatus completes: the impedance transformation function of 50 ohm and 75 ohm, multiple wireless signal and CATV signal He road function, wireless signal and CATV signal close the signal constant power distribution function behind road, the exchanges data of Ethernet data signal and modulation function, the signal after wireless and CATV signal He road signal constant power distributes and the Ethernet data signal after modulation close the function on road.
CATV cable TV signal and wireless signal all belong to medium-high frequency signal, can CATV signal and wireless signal be mixed by mixer.This new equipment can make full use of the characteristic of EOC functions of the equipments He He road signal medium-high frequency, and local side apparatus all can act on mixed signal now to the operation of CATV signal and processing, only device need be changed into wideband device.Afterwards this mixed signal and Ethernet data signal are mixed and carry out follow-up work, complete effective co-cable transmission of CATV signal, Ethernet data signal and wireless signal.A difficult problem that has so not only solved indoor covering has realized the indoor covering of wireless signal simply and easily, and takes full advantage of again the various advantages of point-to-point low frequency modulations EOC equipment.
The coaxial cable of CATV signal by 75 ohm closes road with wireless signal and CATV signal and is connected with allocation units, multiple wireless signal is connected with CATV signal combiner unit with wireless signal respectively by 50 ohm of wireless signal coaxial cables, and the signal halves behind Bing Jianghe road is that export by CATV coaxial cable on some roads; Ethernet data signal, by after exchanges data and modem module, is divided into the Ethernet data modulation signal of the identical way in some roads; This two classes signal closes road in the point-to-point mode on the multi-signal combiner unit corresponding Yi Gezhi of inner each branch road road and then by some roads CATV coaxial cable, exports.Wherein, the impedance transformation of 50 ohm to 75 ohm of multiple signals is at wireless signal with CATV signal closes road and allocation units inside completes.
Ustomer premises access equipment comprises: signal distribution unit, the separative element of wireless signal and CATV signal, the modem module of Ethernet data signal, the transmitter unit of wireless signal.
Ustomer premises access equipment completes: the separation function of wireless signal and CATV signal He road signal and Ethernet data signal, and the separation function of wireless signal and CATV signal, the demodulation function of Ethernet data signal, in the building of various wireless signals or indoor covering function.
Signal enters after ustomer premises access equipment first entering signal separative element, and this unit receives and carries out separated with CATV signal He road signal with Ethernet data signal to wireless signal.Wireless signal and CATV He road signal are connected to respectively in high pass filter and low pass filter successively, and wireless signal is gone out by antenna transmission after by high pass filter, completes the covering of wireless signal.CATV signal, by low pass filter, is input to CATV interface by CATV signal.Ethernet data signal is connected with subscriber equipment by interface after by modulation /demodulation module.Signal high pass filter completes extraction and the isolation Ethernet digital signal of wireless signal and CATV signal, and high pass filter completes the extraction of wireless signal and isolates CATV signal, and low pass filter completes the extraction of CATV signal and isolates wireless signal.
Local side apparatus and ustomer premises access equipment in conjunction with and utilize the function (part of devices of existing equipment need be changed into the device of wideband) of original EOC local side and each module of ustomer premises access equipment, jointly complete CATV signal, wireless signal also has the transmission work of Ethernet data signal.
Accompanying drawing explanation
Fig. 1 is the system architecture diagram of equipment according to the preferred embodiment of the invention;
Fig. 2 is the concrete function block diagram of equipment according to the preferred embodiment of the invention;
Fig. 3 is that the new E OC equipment access of multimodality is according to the preferred embodiment of the invention to the schematic diagram of a plurality of user terminals;
Embodiment
Below in conjunction with accompanying drawing, describe the preferred embodiments of the present invention in detail.
As shown in Figure 1, the wireless signal of different systems closes road by wireless signal and CATV signal and allocation units mix with CATV TV signal, Ethernet data signal is through data exchange module and modulation /demodulation module, after ovennodulation, input to signal mixing module, be divided into the wireless signal of multichannel with after demultplexer (such as Shi Erlu, Shi Si road etc.) and the mixed signal of CATV signal is mixed rear output, the mixed signal after output is transferred to subscriber terminal equipment through coaxial cable.Subscriber terminal equipment is separated into mixed signal mixed signal and the network downstream signal of wireless signal and CATV signal, the mixed signal of wireless signal and CATV signal is separated through the separative element of wireless signal and CATV signal, cable TV signal user after TV signal output interface access TV can watch program, wireless signal is gone out and is realized indoor covering by antenna transmission, and network downstream signal exports user to after the demodulation of terminal modulation /demodulation module.From the up-link wireless signal of user terminal, through high pass filter and signal high pass filter, then be transferred to local side apparatus by coaxial cable, finally by cable, get back to base station.The modulation /demodulation module that uploads to local side through coaxial cable (coaxial cable of CATV user assignment network) from the network uplink modulation signal of user terminal is carried out demodulation, in order to exchange with the network signal of base station.Embedded computer be connected in multi-channel video switch and and data exchange module between, for controlling the break-make of user's cable TV passage.
As shown in Figure 2, this equipment equipment comprises local side apparatus and passes through the connected subscriber terminal equipment of coaxial cable.This local side apparatus mainly comprises that wireless signal and CATV signal close road and allocation units, data exchange module, CATV user management module, modulation /demodulation module and signal mixing module etc.This subscriber terminal equipment comprises signal distribution unit, the separative element of wireless signal and CATV signal, the modem module of Ethernet data signal, the transmitter unit of wireless signal.
Data exchange module is the core of Ethernet data exchange, and it comprises Ethernet switching chip, controls CPU, network isolation transformer, power supply and indicator light etc.The lower port Chu Yi road of this ethernet switching module connects outside CATV user management module, and each road is all connected with a modulation /demodulation module, then by coaxial cable, is connected with terminal modulation /demodulation module through signal mixing module.
CATV user management module is one and take the module that single-chip computer control system is major part, complete and data module between network data transmission, from computer network, obtain instruction, generate control signal and be sent to signal mixing module, control the break-make of CATV signal subscriber channel and also can process the current state of the CATV signal subscriber channel returning.
The wireless signal of different systems, GSM, CDMA, DCS, WCDMA, OHS, TD-SCDMA, WLAN etc., 50 ohm of wireless signal coaxial cable input interfaces that close road and allocation units by cable and the signal of local side apparatus are connected, the 75 ohm coaxial cable input interfaces that CATV signal closes road and allocation units by coaxial cable and signal are connected, at signal, close the impedance transformation that first road and allocation units inside complete 50 ohm to 75 ohm of wireless signals, close again road with CATV signal afterwards, then for example close road signal, through demultplexer (Shi Er road, Shi Si road etc.) after, be divided into the signal output of multichannel.Ethernet data signal is through data exchange module and modulation /demodulation module, after ovennodulation, input to signal mixing module, mix rear output with the wireless signal and the CATV cable TV signal He road signal that are divided into multichannel after demultplexer (such as Shi Erlu, Shi Si road etc.), the mixed signal after output is transferred to subscriber terminal equipment through coaxial cable.Subscriber terminal equipment is separated into wireless signal and CATV cable TV signal He road signal and network downstream signal by mixed signal, wireless signal and CATV cable TV signal He road signal are connected to respectively in high pass filter and low pass filter successively, wireless signal is gone out by antenna transmission after by high pass filter, completes the covering of wireless signal.CATV signal, by low pass filter, is input to CATV user interface by CATV signal.Network downstream signal exports user to after the demodulation of terminal modulation /demodulation module.From the up-link wireless signal of user terminal, through high pass filter and signal high pass filter, then be transferred to local side apparatus by coaxial cable, finally by cable, get back to base station.
As shown in Figure 3, this equipment can be by CATV cable TV signal, wireless signal and Ethernet DATA data-signal access to user simultaneously, owing to having adopted modulation-demodulation device, so can pass through branch distributor while transferring to terminal equipment by local side apparatus, before having overcome, baseband equipment cannot be by the problem of branch distributor.An equipment can support at most 14 users to surf the Net simultaneously and see TV, and strengthened the indoor coverage strength of wireless signal, is not affected each other each other.
By above description, can learn that the present invention has following feature and advantage:
1. realized point-to-point single channel transmission, each user has oneself independently transmission link, the transmission of signal from local side to terminal use is all separate isolation, has therefore effectively prevented signal cross-talk between user and user and the noise collection effect of termination.Adopted modulation-demodulation technique, actual signal transmission distance has also increased.
2. this equipment has strengthened the antijamming capability of signal transmission, owing to Ethernet data having been adopted to the measures such as modulation, error correction, scrambling, thereby has effectively guaranteed the high-quality transmission of ethernet signal in signals transmission.
3. indoor transmissions and the covering of wireless signal by existing CATV cable tv coax, have been completed, solve the problem of the aspects such as indoor distributed system cabling is difficult, great in constructing amount, project cost is high, effectively improved corridor or indoor network coverage quality.Engineering construction is simpler, and cost is low, suits large area to popularize.
4. adopt newer anti-lightning strike technology at present, make the operation that equipment also can be normal and safe under thunderstorm weather, can not make equipment suffer destructive destruction because of Thunderstorm Weather.
Claims (5)
1. utilize CATV coaxial cable to realize the scheme that wireless signal enters building or registered one's residence indoor covering, on the basis of the point-to-point low frequency modulations EOC equipment of Shi our company, further put forward, enter according to the following steps: first utilize the device with 50 ohm/75 ohmage mapping functions mobile communication signal to be converted to the signal output of 75 ohmages that are adapted at transmitting in CATV coax network; Then CATV cable TV signal and wireless signal are closed to road, close road and close road with Ethernet data signal more afterwards; Next utilizes CATV coax network to transmit signal; Comprise local side apparatus and ustomer premises access equipment, wireless signal is connected with local side apparatus by coaxial cable, and local side apparatus is connected with ustomer premises access equipment by CATV coaxial cable, and local side apparatus is placed in corridor light current well, and ustomer premises access equipment is placed in user family; Wireless signal used is GSM, CDMA, and DCS, WCDMA, PHS, TD-SCDMA wireless mobile communications signal, can be also WLAN signal; Local side apparatus completes: the impedance transformation function of 50 ohm and 75 ohm, multiple wireless signal and CATV signal He road function, wireless signal and CATV signal close the signal constant power distribution function behind road, the exchanges data of Ethernet data signal and modulation function, the signal after wireless and CATV signal He road signal constant power distributes and the Ethernet data signal after modulation close the function on road; Ustomer premises access equipment completes: the separation function of wireless signal and CATV signal He road signal and Ethernet data signal, and the separation function of wireless signal and CATV signal, the demodulation function of Ethernet data signal, in the building of various wireless signals or indoor covering function.
2. covering system according to claim 1, it is characterized in that: described local side apparatus also comprises that CATV and wireless signal close road and allocation units (including 50/75 ohmage converting unit), signal combiner unit, data exchange module, modulation /demodulation module, cable TV subscriber's administration module, data/TV signal mixing module.
3. according to claim 2, the upper port access network data-signal of data exchange module, lower port Yi road is connected with cable TV subscriber's administration module is two-way, two-way connection of modulation /demodulation module of each Lu Douyu of all the other of lower port, signal mixing module respectively with cable TV subscriber's administration module, network allocation amplifying device and for connecting the two-way connection of coaxial cable of subscriber terminal equipment, modulation /demodulation module is connected with data/TV signal mixing module by network allocation amplifying device, signal mixing module is mixed cable TV signal and wireless signal and CATV cable TV signal He road signal, by cable tv coax, be transferred to user side.
4. covering system according to claim 1, is characterized in that: described user side unit comprises signal distribution unit the separative element of wireless signal and CATV signal, the modem module of Ethernet data signal, the transmitter unit of wireless signal.
5. according to claim 4, signal enters after ustomer premises access equipment first entering signal separative element, and this unit receives and carries out separated with CATV signal He road signal with Ethernet data signal to wireless signal; Then wireless signal and CATV He road signal be successively by high pass filter and low pass filter, and wireless signal is gone out by antenna transmission after by high pass filter, completes the covering of wireless signal; CATV signal, by low pass filter, is input to CATV user interface by CATV signal; Ethernet data signal is connected with subscriber equipment by interface after by modulation /demodulation module; Signal high pass filter completes extraction and the isolation Ethernet digital signal of wireless signal and CATV signal, and high pass filter completes the extraction of wireless signal and isolates CATV signal, and low pass filter completes the extraction of CATV signal and isolates wireless signal.
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| CN201310010634.0A CN103929314A (en) | 2013-01-12 | 2013-01-12 | Multi-mode access novel EOC device |
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| CN201310010634.0A CN103929314A (en) | 2013-01-12 | 2013-01-12 | Multi-mode access novel EOC device |
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Application publication date: 20140716 |