CN101388821B - Access network implementing system and method for bearing all information services of local customer - Google Patents
Access network implementing system and method for bearing all information services of local customer Download PDFInfo
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- CN101388821B CN101388821B CN2008102237849A CN200810223784A CN101388821B CN 101388821 B CN101388821 B CN 101388821B CN 2008102237849 A CN2008102237849 A CN 2008102237849A CN 200810223784 A CN200810223784 A CN 200810223784A CN 101388821 B CN101388821 B CN 101388821B
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Abstract
The invention discloses an implement system of an access network for loading all information business of resident users, which comprises a main unit, an expansion unit and a remote end unit. The invention further discloses an implement method of the access network for bearing all the information business of the resident users, which comprises the following steps: jointing and combining one or more than one kinds of signals which are sent by an information source, transmitting the signals to one or more than one remote ends through optical fiber after converting the signals into light signal branching, carrying out the electric-to-optical conversion to the light signals which are respectively received by each of the remote ends, radiating the signals to a user end through an antenna, transmitting the light signals through the optical fiber after respectively carrying out the electric-to-optical conversion to electrical signals which are received through the antenna by each of the remote ends, respectively converting the received light signals into the electrical signals, transmitting the electrical signals through dividing the signals into business RF electrical signals in different frequency ranges after integrating the electrical signals into the electrical signals. With the invention, the functions of accessing and exiting all types of user information business and the loading transmission function can be realized in resident areas only through building a physical network.
Description
Technical field
The access network that the invention belongs to the technical field of access networks of communication network, particularly bearing all information services of local customer is realized system and method.
Background technology
So-called station access network or user access networks (Customer Premises Network, be called for short CPN, or Subscriber Premises Network, be called for short SPN) be meant that the user terminal of user net area is to the machine wire apparatus that is comprised between user-network (metropolitan area Access Network) interface, form by the user resident wiring system of finishing communication and controlled function, make user terminal can insert metropolitan area network easily.The scale difference of station access network is very big, can be greatly to company, factory or campus, and little extremely small residential quarter and even residential building.
But existing all multi-access modes are inapplicable because standard is different, or frequency band is narrow all can not implement many nets and merge, can not make up separately and can implement the unified station access network that multiple source inserts, as:
EPON (Ethernet Passive Optical Network, Ethernet passive optical network) and GE-PON (GHz Ethernet Passive Optical Network, what gigabit ethernet passive optical network) adopt is American-European standard, is not suitable as unified station access network;
ADSL (Asymmetrical Digital Subscriber Loop, ADSL (Asymmetric Digital Subscriber Line)) provides the bandwidth of up 640kbps, descending 8Mbps on 1 pair of twisted-pair feeder, limited bandwidth is also inapplicable;
The merging that POI (Point of Interface, many nets close channel platform) can only solve the mobile communication signal of several standard systems;
BBU (Baseband Unit, base band resource pool/base band shared resource pond/baseband pool/Base Band Unit)+RRU (Remote Radio Unit, remote radio unit (RRU)) subject matter is that frequency band is narrow, can not realize that many nets merge;
The device systems subject matter of U.S. LGC wireless device company also is that frequency band is narrow, can not realize that many nets merge;
General traditional repeater relaying (RFPA, Radio Frequency Power Amplifier, radio-frequency power amplifier), comprise channel selection type repeater, Frequency Band Selection type repeater, broad band repeater etc., topmost problem is that frequency band is narrow equally, can not realize that many nets merge;
CATV (Cable Television, cable TV) can only transmitting television signals, or the like.
In China, the state of station access network is that various public networks such as fixed-line telephone network, mobile radio communication, broadcasting and television network adhere to different departments, different operators separately in the current information networking, corresponding station access network also is respectively to build each, and the repeated construction problem is very serious.Especially outstanding in the 2G mobile communications network is built, some places even in the both sides of a street, China Mobile and CHINAUNICOM respectively build a base station.This repeated construction causes the significant wastage of resource, and administrative department is difficult to coordinate, and operation and maintenance cost are high.Media report, five big operators cumulative investments such as China Mobile in 2002 to 2006 are used for infrastructure construction for 11,235 hundred million yuan, overlapping investment causes network resource utilization generally on the low side, communications optical cable utilance only about 1/3rd, and increase enterprise's depreciation and operation and maintenance cost.In fact, 2004 just the someone point out the amount of money that the telecommunications industry repeated construction is wasted even can build several Three Gorges Projects.This problem is just seriously perplexing each big common carrier senior executive at present.
As mentioned above, there are problems in traditional access network, and especially frequency band is narrow, and the availability of frequency spectrum is low, can't realize that the unified of 500kHz～all communication networks of 3GHz full frequency band inserts, and can not build up unified station access network.Thereby need a kind of unified access method of station access network badly, build the station access network of all communication networks such as the compatible fixed network of energy, Broadcasting Cable Network and 2G, 3G mobile radio communication, solve system-wide unified access of communication network, avoid overlapping construction, improve communication quality, be convenient to the extension of network upgrading.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of access network of bearing all information services of local customer to realize system and method, be used to realize system-wide unified access of communication network.
For achieving the above object, the access network that the invention provides a kind of bearing all information services of local customer is realized system, comprising:
Master unit comprises service signal mixer, electrical optical converter and optical branching device, is used for the signal tandem merging with one or more information source transmission, and passes through Optical Fiber Transmission after being converted to the light signal shunt; Also comprise one or more photoelectric transformers, multiple signals mixer and service signal splitter, a road or the one road above light signal that is used for receiving is converted to the signal of telecommunication respectively, and the professional rf signal that is divided into different frequency range behind synthetic one road signal of telecommunication sends;
At least one far-end unit comprises photoelectric transformer, downstream filter, descending compensated amplifier and microwave antenna, and the light signal that is used for receiving carries out opto-electronic conversion, arrives receiving terminal by aerial radiation; Also comprise microwave antenna, up compensated amplifier, upstream filter and electrical optical converter, the signal of telecommunication that is used for receiving by antenna carries out electric light conversion, passes through Optical Fiber Transmission after being converted to light signal.
The present invention also provides a kind of access network implementation method of bearing all information services of local customer, comprising:
The signal tandem that one or more information source is sent merges, and be converted to light signal along separate routes the back by Optical Fiber Transmission to one or more far-ends; Described one or more far-ends carry out opto-electronic conversion with the light signal that receives, and arrive receiving terminal by aerial radiation;
The signal of telecommunication that the terminal that one or more far-ends will receive by antenna sends carries out the electric light conversion respectively, passes through Optical Fiber Transmission after being converted to one road or one road above light signal; A road or the one road above light signal that master unit will receive is converted to the signal of telecommunication respectively, and the professional rf signal that is divided into different frequency range behind synthetic one road signal of telecommunication sends to information source.
The present invention implements the multi-service signal by root node and closes the road, implements multiple source and inserts or the network integration, and the access of all information services is provided for the net area user; The all-network node realize same bandwidth, etc. flow, can provide identical whole business demands for all users of net area, and be convenient to network and implement the expansion upgrading with the flexibility of minimum cost, height; And the present invention adopts the optical cable transmission, because the super low consumption characteristic of optical cable makes master unit near information source, makes far-end unit near the user, so that use the micropower power amplifier, reduces and disturbs, and reduces noise, purifies electromagnetic environment, and can expand the coverage area; At last, can set up the station access network of different scales, in station access network on a small scale, implement user's tandem by the one-level expanding element according to the flexible in size of user net area; In fairly large station access network, then implement user's tandem by secondary (or multistage) expanding element.
Compare with the realization technical method of all now station access network network, the station access network network that technical scheme of the present invention realized not only has realizes that to the needed various information services of all users in the net area unified access picks out and carry transfer capability, and network has many characteristics: can provide huge information to insert and the transmission capacity, network transmits signal quality height (having higher signal-to-noise performance), the network design standard, node device is unified standard, node device is realized simple, with low cost and the network engineering construction tissue of transmission medium is convenient to standard, thereby reduces network construction cost significantly.
The beneficial effect that these characteristics directly produce be for the net area user build the unified high-quality that can merge diverse network, low cost, low electromagnetic pollution, to the Access Network of environmental disruption minimum, the access of finishing the information services of all kinds in this net area picks out and carries transmitting function.These information services, not only comprise now so that the mobile communications network institute loaded information business of the various standards that all common carriers of following China are managed, various wired, fixed broadband data message business that wireless system supported, various wired, the broadcast television service that wireless digital/the simulated television network is supported that have comprised also that present domestic all radio and television operators are provided, and in the net area based on the information service of the safety management control criterion defined of industrial production or resident living.
Description of drawings
Fig. 1 is the access network structure chart of a kind of bearing all information services of local customer in the embodiment of the invention;
Fig. 2 is the system equipment structure chart of the access network of bearing all information services of local customer in the embodiments of the invention;
Fig. 3 is the structure chart of master unit in the embodiment of the invention;
Fig. 4 is the structure chart of expanding element in the embodiment of the invention;
Fig. 5 is the structure chart of far-end unit in the embodiment of the invention;
Fig. 6 is the process flow figure of the access network downstream signal of bearing all information services of local customer in the embodiment of the invention.
Embodiment
Embodiments of the invention are implemented the multi-service signal by root node and are closed the road, implement multiple source and insert or the network integration, and the access of all information services is provided for the net area user; The all-network node realize same bandwidth, etc. flow, can provide identical whole business demands for all users of net area, and be convenient to network and implement the expansion upgrading with the flexibility of minimum cost, height; And the present invention adopts the optical cable transmission, because the super low consumption characteristic of optical cable makes master unit near information source, makes far-end unit near the user, so that use the micropower power amplifier, reduces and disturbs, and reduces noise, purifies electromagnetic environment, and can expand the coverage area; At last, can set up the station access network of different scales, in station access network on a small scale, implement user's tandem by the one-level expanding element according to the flexible in size of user net area; In fairly large station access network, then implement user's tandem by secondary (or multistage) expanding element.
Before the present invention, station access network is as each information network inalienable part, its existence form class of business and network technology system that information network provided that place one's entire reliance upon forms the situation that each information network operator must have the property right of overall network end to end that begins from its service-user terminal signaling interface separately.This not only causes the constantly overlapping investment and cause operation cost to rise on residence network of each operator, operating income descends, simultaneously also net area is caused community environment's heavy damage attractive in appearance, cause net area owner's dislike and increase the difficulty of construction coordination because of the engineering construction of repeatability.
And major technique thinking of the present invention is the angle from the professional demand of local customer information service, the network technology standard and the key features such as signal form and information flow-rate thereof that are used to support various information services transmission are at present analyzed, in the regional extent under the information user of (such as community's property right scope of " law of property " defined of promulgation China last year) under certain specific limited condition, carried out conclusion and logical abstraction in order to the network configuration that supports various information services, thereby obtained possessing a kind of tree network topological diagram that the carrying specific traffic flows requires characteristics.This tree network is made up of root node, multistage expansion child node and frontier node, its characteristics that are different from other conventional tree networks are the service bearer abilities that can support, promptly this tree network comprises root node and has the service traffics enabling capabilities that capacity is identical and bandwidth is huge in interior all nodes and path, can be referred to as flow tree topology structural networks such as the whole network.
According to network topology structure described above and service bearer characteristics thereof, the station access network network standard that the embodiment of the invention will need to realize is three types a part: be used for various information service networks and concentrate convergence point---be the root node of topological network; Be used in net area, can finishing to the transmission of all information services and the continued cascaded message expansion distributed points of distributed function---be the child nodes at different levels of tree network; And the various forms of signals that produced towards various information services terminal equipments, the various information services that local customer is required insert the far-end information access point of residence networks---and be the frontier node of tree.
Pick out information flow-rate transmission requirement at above-described node species and its access of being carried, the super wideband modulating baseband (spectrum of radio frequency signals that can hold all public networks that the embodiment of the invention selects the continuous radiofrequency signal frequency range of 500kHz～3GHz to pick out and transmit as the various information service signals that whole network supported, and non-radiofrequency signal carried out frequency translation, move in this baseband) transmission medium, the analog optical signal of the maximum broader frequency spectrum performance that selection is had is as the transmission carrier of super wideband baseband signal, all be transformed into by information service signal on the various frequency ranges of super wideband base band scope all-network, and then the unification of whole super wideband baseband signal is modulated to analog optical signal transmission finishes node and transmission path on and the distribution of signal, thereby realized with wireless and fiber-optic signal serving as that main information transmits in the user net area of medium and can provide the user resident information access network that picks out and distribute and transmit to information services at whole station access network network by fiber medium.
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, the tree topology figure of a kind of access network that can bearing all information services of local customer that provides for the embodiment of the invention specifically comprises:
Be used for the master unit that various information service networks are concentrated tandem as the root contact; Be used in net area, finishing expanding element (branch one-level, secondary or more multistage) as child node to the continued cascaded message expansion distributed points of the transmission of all information services and distributed function; And the various forms of signals that produced towards various information services terminal equipments, the far-end information access point that the various information services that local customer is required insert residence networks is the far-end unit of tree frontier node.And between these unit as the optical cable of transmission medium, they have many good characteristics such as ultra broadband, super low consumption, low cost.
In Fig. 1, the root node of information source side (master unit) is implemented the tandem of various information sources, child node (expanding element) can be provided with one-level or two-stage (or more than two-stage) according to the scale of overlay area, generally be located at buildings such as villa, apartment or office building, the final stage child node is implemented user's tandem.The area of coverage is not established multistage sub-contact on a small scale, and directly implements user's tandem by the sub-contact of one-level.Frontier node (far-end unit) is implemented the photosignal conversion, converts the light signal that is sent to this node to radiofrequency signal, delivers to a day alignment user and radiate.
In station access network on a small scale, implement user's tandem by the one-level expanding element; In fairly large station access network, then implement user's tandem by secondary (or multistage) expanding element.
The equipment disposition amount is decided by user's request, can realize connecting flexibly of different scales Access Network.For example, in tree-like Access Network shown in Figure 1, if the area of coverage is very little, number of users is no more than 8, in requisition for far-end unit be no more than 8, need not expanding element, far-end unit directly is connected with master unit far away from the information source side by optical cable; If 9 users are arranged, need 9 far-end units, an expanding element (far-end unit can directly be received on the master unit); If the area of coverage is bigger, 65 users are arranged, need 65 far-end units, one-level expanding element, 8 secondary expanding elements (far-end unit can directly be received on the master unit).The rest may be inferred, and the more massive area of coverage then needs more far-end unit and more I and II expanding element.
In network configuration shown in Figure 1, the root node of station access network should be as far as possible near information source, and frontier node is as far as possible near local customer.This is because optical cable has the super low consumption characteristic, makes master unit near information source, makes far-end unit near the user, and can expand the coverage area.In addition, should adopt optical fiber to make transmission medium, have ultra broadband, super low consumption, advantage cheaply.
In this network configuration, root node is provided with the multi-service signal combiner, is used to implement the network integration.The fusion of this network is to realize by the microwave fan-in network that the set service signal mixer of master unit input constitutes.Be that miscellaneous service signals such as various wireless mobile network signals, various wired, radio fixed wide band data information user signal, various broadcast television signal, voice signal and community management net signal all are transformed into the service signal mixer that corresponding radiofrequency signal in 500kHz～3GHz full frequency band scope is input to the master unit input, be merged into one road ultra-wide band radio-frequency signal, be transformed into light signal output again.
Because optical branching device is the same with splitter or threeway in the microwave device, just implement the shunt of same spectra signal, i.e. whole output signal spectrum width of outputs and amount of information is identical accordingly, thus the all-network node realize same bandwidth, etc. flow.
Fig. 2 is the system equipment structure chart of access network that can bearing all information services of local customer (this figure is an example with different mobile communications network information services only) in the embodiments of the invention.Wherein, BS is the base station, the expression information source, and this system comprises:
ATT is a microwave attenuator, is used for adjusting to the level of radiofrequency signal unanimous on the whole.This is because AGC (the Automatic Gain Control in user terminal (as the mobile phone) receiver, automatic gain control) adopt peak value control usually, if it is too big that amplitude output signal differs, what signal was strong a road presses receiver gain very low, can cause one tunnel signal to noise ratio of weak signal very poor, even can not receive.Be input as example with two base station signals,, observe the amplitude output signal size, remember the amplitude of weak signal one tunnel, disconnect it, connect strong signal one tunnel, increase the attenuation of ATT, amplitude output signal and weak signal amplitude are got final product about equally by the road input.
Master unit (MU) is used for various information service networks are concentrated tandem, and the processing of downstream signal comprises at least: the passive combiner of microwave is used for adjusted radiofrequency signal is merged, thereby realizes the tandem of multi-service signal; Electrical optical converter is used for the radiofrequency signal after merging is converted to light signal; Optical branching device is used for the light signal after the conversion is shunted to multipath light signal, exports through optical cable.The processing of upward signal comprises at least: a plurality of photoelectric transformers become multipath light signal into the signal of telecommunication respectively; The multiple signals mixer is in order to synthetic one road signal of telecommunication; The microwave passive splitter in order to will synthesize the service signal that one tunnel the signal of telecommunication is divided into different frequency range, is sent corresponding base station.The structure of master unit as shown in Figure 3.
Expanding element (EU) is used for finishing transmission and the distributed function to all information services in net area.Wherein, downstream signal is handled and comprised at least: photoelectric transformer becomes downlink optical signal into the signal of telecommunication; Signal of telecommunication compensation processor compensates amplification to the signal of telecommunication; Electrical optical converter is a light signal with electrical signal conversion; Optical branching device is divided into identical multipath light signal with one road light signal and delivers to next stage expanding element or far-end unit.The processing of upward signal comprises at least: a plurality of photoelectric transformers become multipath light signal corresponding multi-channel electric signal respectively; The multiple signals mixer is in order to synthesize one road signal of telecommunication with multi-channel electric signal; Signal of telecommunication compensation processor is with signal of telecommunication compensation deals; Electrical optical converter becomes light signal with converting electrical signal, serves grade expanding element or master unit.The function of expanding element as shown in Figure 4.
RU is a far-end unit, because it will convert light signal to radiofrequency signal, delivers to a day alignment user and radiate, so be also referred to as far-end antenna element (RAU).Wherein, comprise at least in the processing of downstream signal: photoelectric transformer, the light signal that is used for receiving carries out opto-electronic conversion; Downstream filter is used for improving the outer inhibition degree of band, leaches purer downlink electrical signal; Descending compensated amplifier compensates amplification with the downlink electrical signal; Frequency diplexer, the uplink and downlink frequency that is used for being connected to the same antenna separately and will downlink electrical signal be wherein filtered to such an extent that deliver to microwave antenna after purer; Microwave antenna is used for described downlink electrical signal radiation to user terminal.On down direction, why after downstream filter has leached the downlink electrical signal, also to further filter the downlink electrical signal purer with frequency diplexer, be because avoid the inhibition degree of downstream filter not enough, cause the part upward signal not by filtering, by adopting frequency diplexer to increase the outer inhibition of band, can reduce influencing each other of uplink and downlink signals, improve the quality of signal of communication.
Processing on up direction comprises at least: microwave antenna, be used for the rf signal that receiving terminal sends, and deliver to frequency diplexer; Frequency diplexer is used for the uplink and downlink frequency separately, and wherein the preliminary filter of uplink electrical signals is delivered to up compensated amplifier after pure; Up compensated amplifier is used for uplink electrical signals is compensated amplification; Upstream filter is used for improving the outer inhibition degree of band, leaches purer uplink electrical signals; Electrical optical converter is used for up rf signal is converted to light signal, and delivers to expanding element or master unit by Optical Fiber Transmission.In like manner, adopt frequency diplexer tentatively to filter pure uplink electrical signals, upstream filter is in order to increase the outer inhibition degree of band, can further to reduce between the uplink and downlink signals influencing each other, improving the quality of signal of communication.The function of far-end unit as shown in Figure 5.
ANT is a microwave antenna, as the part of far-end unit, is used for the radiated radio frequency (RF) signal.After upward signal is received by antenna, send electrical optical converter to become light signal and send the final stage expanding element.
By above system, can provide huge information to insert and the transmission capacity, this is that ultra wideband transmissions characteristic by the ultra broadband service signal mixer of 500kHz～3GHz and optical fiber provides; Network transmits the signal quality height, this is because Optical Fiber Transmission is disturbed little, master unit makes its micropower that works in about 0dB export near information source, and the super low consumption transmission characteristic of optical fiber and far-end unit make its terminal power amplifier output only need about 15dBm near user terminal, thereby guarantee that system noise is little, thereby have higher signal-to-noise performance; The network design standard, node device is unified standard, and node device is realized simple, and the with low cost and network engineering construction tissue of transmission medium is convenient to standard, thereby reduces network construction cost significantly.
The effect that these characteristics directly produce be exactly for the net area user build the unified high-quality that can merge diverse network, low cost, low electromagnetic pollution, to the Access Network of environmental disruption minimum, the access of finishing the information services of all kinds in this net area picks out and carries transmitting function.These information services, not only comprise now so that the mobile communications network institute loaded information business of the various standards that all common carriers of following China are managed, various wired, fixed broadband data message business that wireless system supported, various wired, the broadcast television service that wireless digital/the simulated television network is supported that have comprised also that present domestic all radio and television operators are provided, and in the net area based on the information service of the safety management control criterion defined of industrial production or resident living.
As shown in Figure 6, be the process flow figure of the access network downstream signal of bearing all information services of local customer in the embodiment of the invention, present embodiment is that example is described with the cut-in method of mobile communications network, specifically may further comprise the steps:
Each microwave attenuator ATT that step 601, adjustment are connected with the base station, make the level of RF signals of a plurality of base stations (can be the base station of various criterion mobile communications network) unanimous on the whole after, deliver to the master unit corresponding input end.
The light signal of step 603, multichannel output is delivered to the one-level expanding element via optical cable respectively.
Process light/electric the conversion in the one-level expanding element respectively of step 604, each road light signal becomes the signal of telecommunication after carry out electricity/light conversion after the compensation deals again, becomes light signal again after optical branching device output.
The light signal of step 605, each road output is delivered to the secondary expanding element via optical cable respectively.
As previously mentioned, the equipment disposition amount is here decided by user's request, determines whether needs expanding element and secondary expanding element according to number of users.
Upward signal flow process and downstream signal flow process are similar, and be basic identical in other words.Its main difference need in master unit and the expanding element to be a plurality of photoelectric transformers, and the multichannel uplink optical signal of each unit input is carried out light-to-current inversion respectively earlier, is merged into one road signal of telecommunication through mixer after becoming the signal of telecommunication.In master unit, this road synthetic signal of telecommunication is delivered to corresponding information source network need such as (revert to corresponding analog signal through frequency translation, demodulation again) narrowband telephone signals through compensation deals after the service signal mixer is separated into the radiofrequency signal of different frequency range; In expanding element, this road synthetic signal of telecommunication becomes the output of one road light signal through electro-optical conversion again after compensation deals up.
By above method, for the net area user the unified high-quality that can merge diverse network, low cost, low electromagnetic pollution are provided, to the access way of environmental disruption minimum, the access of finishing the information services of all kinds in this net area picks out and carries transmitting function.
In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (11)
1. the access network of a bearing all information services of local customer is realized system, it is characterized in that, comprising:
Master unit comprises service signal mixer, electrical optical converter and optical branching device, is used for the signal tandem merging with one or more information source transmission, and passes through Optical Fiber Transmission after being converted to the light signal shunt; Also comprise one or more photoelectric transformers, multiple signals mixer and service signal splitter, a road or the one road above light signal that is used for receiving is converted to the signal of telecommunication respectively, and the professional rf signal that is divided into different frequency range behind synthetic one road signal of telecommunication sends;
At least one far-end unit comprises photoelectric transformer, downstream filter, descending compensated amplifier and microwave antenna, and the light signal that is used for receiving carries out opto-electronic conversion, arrives receiving terminal by aerial radiation; Also comprise microwave antenna, up compensated amplifier, upstream filter and electrical optical converter, the signal of telecommunication that is used for receiving by antenna carries out electric light conversion, passes through Optical Fiber Transmission after being converted to light signal.
2. system according to claim 1 is characterized in that, this system further comprises:
At least one expanding element, comprise photoelectric transformer, signal of telecommunication compensation processor, electrical optical converter and optical branching device, be used for that descending light signal is converted to signal of telecommunication compensation and amplify, be converted to light signal again and output to next stage expanding element or far-end unit along separate routes; Also comprise one or more photoelectric transformers, multiple signals mixer, signal of telecommunication compensation processor and electrical optical converter, a road or the one road above light signal that is used for receiving is converted to the signal of telecommunication respectively, synthetic one road signal of telecommunication post-compensation amplifies, and sends after the electric light conversion again.
3. system according to claim 2 is characterized in that the quantity of described far-end unit and expanding element and level are decided according to the scale of different Access Networks.
4. according to claim 1,2 or 3 described systems, it is characterized in that this system further comprises:
Microwave attenuator is used for the level of rf signal is adjusted into unanimity.
5. system according to claim 4 is characterized in that, described master unit specifically comprises: on down direction,
The service signal mixer is used for adjusted each the road signal unification of level is transformed into rf signal, and wherein non-radiofrequency signal transforms to rf signal through modulation, frequency conversion, and merges, thereby realizes the tandem of multi-service signal;
Electrical optical converter is used for the rf signal after the described merging is converted to light signal;
Optical branching device is used for the light signal after the described conversion is shunted to multipath light signal, and exports by optical fiber;
On up direction,
One or more photoelectric transformers are used for converting one road or one road above light signal to the signal of telecommunication respectively respectively;
The multiple signals mixer is used for synthesizing one road signal of telecommunication with described one the road or one the tunnel with power on signal;
The service signal splitter is used for the different business signal of the synthetic signal of telecommunication is separated, and delivers to different information source networks respectively.
6. according to claim 2 or 3 described systems, it is characterized in that described expanding element specifically comprises: on down direction,
Photoelectric transformer, the light signal that is used for receiving carries out opto-electronic conversion, converts the signal of telecommunication to;
Signal of telecommunication compensation processor is used for the described signal of telecommunication is compensated amplification;
Electrical optical converter, being used for the electrical signal conversion after the described amplification is light signal;
Optical branching device is divided into the multipath light signal that equates fully with one road light signal, and is sent to next stage expanding element or far-end unit;
On up direction,
One or more photoelectric transformers, a road or the one road above light signal that is used for receiving convert the corresponding signal of telecommunication respectively to;
The multiple signals mixer is used for a road or one tunnel after the described conversion synthesized one road signal of telecommunication with power on signal;
Signal of telecommunication compensation processor is used for described one road signal of telecommunication is compensated amplification;
Electrical optical converter is used for the electrical signal conversion after the described amplification is become light signal, sends to higher level's expanding element or master unit.
7. system according to claim 4 is characterized in that, described far-end unit specifically comprises: on down direction,
Photoelectric transformer, the light signal that is used for receiving carries out opto-electronic conversion;
Downstream filter is used for improving the outer inhibition degree of band, leaches simple downlink electrical signal from the signal of telecommunication after the conversion;
Descending compensated amplifier compensates amplification with described downlink electrical signal;
Microwave antenna is used for described downlink electrical signal radiation to receiving terminal;
On up direction,
Microwave antenna is used for the rf signal that receiving terminal sends;
Up compensated amplifier is used for the described signal of telecommunication is compensated amplification;
Upstream filter is used for improving the outer inhibition degree of band, leaches purer uplink electrical signals the signal of telecommunication after amplifying;
Electrical optical converter is used for described uplink electrical signals is converted to light signal, and delivers to expanding element or master unit by Optical Fiber Transmission.
8. system according to claim 7 is characterized in that, described far-end unit further comprises:
Frequency diplexer, be used for receive on the same antenna the up-downgoing frequency separately, and on down direction, will be through the downstream filter preliminary purification, the downlink electrical signal after amplifying further filters to such an extent that send to microwave antenna after purer; On up direction, be used for the up-downgoing frequency of described rf signal is separated, and will send to up compensated amplifier after the uplink electrical signals preliminary purification.
9. the access network implementation method of a bearing all information services of local customer is characterized in that, comprising:
The signal tandem that one or more information source is sent merges, and be converted to light signal along separate routes the back by Optical Fiber Transmission to one or more far-ends; Described one or more far-ends carry out opto-electronic conversion with the light signal that receives, and arrive receiving terminal by aerial radiation;
The signal of telecommunication that the terminal that one or more far-ends will receive by antenna sends carries out the electric light conversion respectively, passes through Optical Fiber Transmission after being converted to one road or one road above light signal; A road or the one road above light signal that master unit will receive is converted to the signal of telecommunication respectively, and the professional rf signal that is divided into different frequency range behind synthetic one road signal of telecommunication sends to information source.
10. method according to claim 9 is characterized in that, this method further comprises:
Descending light signal is converted to signal of telecommunication compensation amplifies, be converted to light signal again and export along separate routes; A road or the one road above light signal that receives is converted to the signal of telecommunication respectively, and synthetic one road signal of telecommunication post-compensation amplifies, and sends after the electric light conversion again.
11., it is characterized in that this method further comprises according to claim 9 or 10 described methods:
The level of the downlink radio frequency signal of telecommunication is adjusted into unanimity.
Priority Applications (1)
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101873611A (en) * | 2009-04-24 | 2010-10-27 | 北京东方信联科技有限公司 | System and method for accessing and distributing various mobile network signals in user net area |
| CN101741735B (en) * | 2009-11-23 | 2012-05-30 | 北京东方信联科技有限公司 | Relay device and uplink and downlink data forwarding methods thereof |
| CN101860378A (en) * | 2010-05-25 | 2010-10-13 | 北京东方信联科技有限公司 | Access method of WLAN signal in station access network and system |
| CN102231885B (en) * | 2011-06-13 | 2014-07-02 | 福建三元达通讯股份有限公司 | Multifunctional micro-power indoor distributed system |
| CN103684602A (en) * | 2012-09-13 | 2014-03-26 | 白银博德信通科技有限公司 | Method and system for supporting multi-service intelligent access based on radio over fiber technology |
| CN103596194B (en) * | 2013-10-08 | 2016-09-14 | 福建三元达通讯股份有限公司 | Multi-service double-transmission type distribution system |
| CN104159332A (en) * | 2014-07-29 | 2014-11-19 | 杭州都冠通讯设备有限公司 | Mobile communication network access system and method based on co-construction and sharing |
| CN105142242B (en) * | 2015-07-13 | 2018-10-19 | 广州杰赛科技股份有限公司 | Wireless communication system and method |
| US10623129B2 (en) * | 2017-09-15 | 2020-04-14 | Futurewei Technologies, Inc. | Control and management of a first PON using a second PON |
| CN110048777A (en) * | 2019-03-29 | 2019-07-23 | 广州开信通讯系统有限公司 | Digital light compartment system, capacity scheduling method and device |
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