CN101814956A - Method for realizing resident access network for bearing information user full service - Google Patents
Method for realizing resident access network for bearing information user full service Download PDFInfo
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- CN101814956A CN101814956A CN200910078427A CN200910078427A CN101814956A CN 101814956 A CN101814956 A CN 101814956A CN 200910078427 A CN200910078427 A CN 200910078427A CN 200910078427 A CN200910078427 A CN 200910078427A CN 101814956 A CN101814956 A CN 101814956A
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Abstract
The invention discloses a method for realizing a resident access network for bearing an information user full service. The method comprises the following steps of: setting a user resident access network as a tree network topological structure which is provided with a plurality of stages of transmission nodes, wherein the transmission nodes have equal information capacity and all nodes in the access network are divided into three types: service nodes, transmission nodes and user nodes; selecting an overall frequency band of 500 to 3 GHz for bearing an overall radio frequency signal carrier of a resident information user full service; and adopting an optical wave as a carrier of full-service information in the frequency band of 500 kHz to 3 GHz in the overall resident access network. The resident access network realized by the invention has the capacity of realizing uniform access, and the bearing and transmission capacity of various information services required by all users in a resident area, can provide tremendous information access and transmission capacity, and has high quality of signals transmitted by the network (higher signal-to-noise performance), simple implementation of node equipment and low cost of a transmission medium, thereby reducing network construction cost greatly.
Description
Technical field
The invention belongs to the technical field of access networks of communication network, particularly a kind of method that realizes the station access network of beared information user full-service.
Background technology
Station access network (or claiming user access networks) is the important component part of communication network.Existing all multi-access modes are not inapplicable because standard is different, all can not implement many net fusions exactly because of frequency band is narrow, can implement the unified station access network that multiple source inserts and can't make up separately.As:
What (1) Ethernet passive optical network (EPON) and gigabit ethernet passive optical network (GE-PON) adopted is American-European standard, is not suitable as unified station access network; (2) ADSL (Asymmetric Digital Subscriber Line) (ADSL) provides the bandwidth of up 640kbps, descending 8Mbps on 1 pair of twisted-pair feeder, and limited bandwidth is also inapplicable; (3) BBU (Base Band Unit)+RRU (remote radio unit (RRU)), subject matter is that frequency band is narrow, can not realize that many nets merge; (4) 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; (5) general traditional repeater relaying (RFPA) comprises channel selection type repeater, Frequency Band Selection type repeater, broad band repeater etc., and topmost problem is that frequency band is narrow equally, can not realize that many nets merge 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, overlapping investment, repeated construction problem are very serious, the significant wastage that causes resource, administrative department is difficult to coordinate, and operation and maintenance cost are high.This problem is just seriously perplexing each big common carrier senior executive at present, and the Ministry of Industry and Information Technology attaches great importance to this, has begun to do pilot in the earthquakes in Sichuan disaster area Joint construction and sharing of implements communication infrastructure.
Before the present invention, the existence form of station access network class of business and the network technology system that information network provided that place one's entire reliance upon, form the situation that each relevant operator must have the overall network property right separately, these networks all are the networks end to end that begin from its service-user terminal signaling interface.This causes the basic reason of each operator constantly overlapping investment, repeated construction on residence network just, thereby cause operation cost to rise, operating income descends, simultaneously also because of the engineering construction of repeatability causes the heavy damage of community's Amenities to net area, cause owner's dislike and increase the difficulty of construction coordination.
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 method that realizes the station access network of beared information user full-service, solve system-wide unified access of communication network, avoid overlapping construction, improve communication quality, be convenient to the extension of network upgrading.
For achieving the above object, the invention provides a kind of method that realizes the station access network of beared information user full-service, comprising:
The user resident Access Network is set to a tree network topological structure with multistage transmission node, and wherein each transmission node information capacity equates, and all nodes in this Access Network are divided three classes: service node, transmission node and user node;
Select 500kHz～3GHz whole frequency band to carry whole guard station information user's full-service radiofrequency signal carrier wave;
Adopt the carrier of light wave as full-service information in whole station access network network 500kHz～3GHz frequency range.
The present invention implements the tandem of multi-service signal by service node and closes the road, and the access of all information services in 500kHz～3GHz ultratvide frequency band is provided for the net area user; The all-network node realize same bandwidth, etc. capacity, can provide identical whole business demands for all users of net area, be convenient to network to implement the expansion upgrading with the flexibility of minimum cost, height; And the present invention adopts full Optical Fiber Transmission, because the super low consumption characteristic of optical fiber makes the service set unit near information source, make user business interface unit near the user simultaneously,, reduce and disturb so that use the micropower power amplifier, reduce noise, purify electromagnetic environment, and can expand the coverage area; At last, can set up the station access network of different scales flexibly according to the size of user net area.In station access network on a small scale, implement user's tandem by the one-level transmission unit; In fairly large station access network, then implement user's tandem by secondary (or multistage) transmission unit.
The station access network network that technical scheme of the present invention realized, not only have the needed various information services of all users in the net area are realized that unified access picks out and carry transfer capability, and network has many advantages: 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.
Technical scheme of the present invention can merge the unified high-quality, low cost, low electromagnetic pollution of diverse network for the net area user builds, 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.In these information services, the mobile communications network institute loaded information business that not only comprises various standards, various wired, fixed broadband data message business that wireless system supported, also comprise various wired, broadcast television services that wireless digital/the simulated television network is supported, 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 a method flow diagram of realizing carrying net area information user FSAN in the embodiment of the invention;
Fig. 2 is a kind of carrying net area information user FSAN network topological diagram in the embodiment of the invention;
Fig. 3 is a kind of system construction drawing that carries net area information user FSAN network in the embodiments of the invention;
Fig. 4 is the structure chart of service set unit in the embodiment of the invention;
Fig. 5 is the structure chart of transmission unit in the embodiment of the invention;
Fig. 6 is the structure chart of user business interface unit in the embodiment of the invention;
Fig. 7 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
Major technique thinking of the present invention is, angle from net area information user business demand, present network technology standard and key features such as signal form and information flow-rate thereof are analyzed, in the regional extent under the information user under certain specific limited condition, conclude and logical abstraction in order to the network configuration that supports various information services, thereby obtain possessing a kind of tree network topological diagram that the carrying specific traffic flows requires characteristics.This tree network is made up of service node, multistage transmission node and user node.This all nodes of network the whole network and path service information capacity equate, the business information capacity enabling capabilities of capacity, ultra broadband such as has.Other conventional tree networks are can't be obtained just for these characteristics.
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 (three category nodes), that is: service node is used for various information service network signals and concentrates tandem; Transmission nodes at different levels are used in net area, finish the transmission of all information services and the continued cascaded message expansion of distributed function are distributed; And user node, towards the various forms of signals that various information services terminal equipments are produced, insert the far-end information that the required miscellaneous service of guard station information user inserts residence network.
Pick out information flow-rate transmission requirement at above-described node species and its access of being carried, the embodiment of the invention selects the continuous radiofrequency signal frequency range of 500kHz～3GHz as the super wide baseband (spectrum of radio frequency signals that can hold all public networks, and non-radiofrequency signals such as data are modulated, frequency translation, move in this baseband), whole network picks out and transmits so that can support the access of various information service signals, the selective light signal is as the transmission carrier of ultra-broadband signal, all be transformed on the various frequency ranges in the ultrabroad band by information service signal all-network, and then with whole ultra-broadband signal unified implementation electricity/light conversion, become optical signal transmission, finish node and transmission path on and the distribution of signal by fiber medium at whole station access network network, thereby realize that with wireless and fiber-optic signal be the local customer information access network that main information transmits medium, can provide the interior access of user net area to pick out and the transmission that distributes information services.
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 method for the station access network of this realization beared information user full-service, the concrete following step of branch of implementing:
Step 101, the local network of users are set to one and have multistage child node and the equal tree network topological structure of each nodal information capacity, and all node unifications are divided into three classes: service node, transmission node and user node;
Step 102, selection 500kHz～3GHz whole frequency band are carried whole guard station information user's full-service radiofrequency signal carrier wave;
Step 103, adopt the carrier of light wave as full-service information in whole station access network network 500kHz～3GHz frequency range;
The transmission equipment side of the service set unit of step 104, service node and the user business interface unit of all user nodes, and optical interface is all adopted in the both sides of the transmission unit of each transmission node, and follow the related specifications that ITU-T is formulated the fibre channel transmission characteristic, make whole station access network realize full Optical Fiber Transmission;
The information source side of step 105, service set unit is provided with microwave and closes the road network network, realizes the tandem of descending full-service radiofrequency signal, and this is closed the road signal becomes light signal by electricity/optical transducer, again through optical branching device demultiplexing light signal; Simultaneously, respectively after light/electric conversion becomes the signal of telecommunication, the synthetic road signal of telecommunication that contains net area information user full-service is given the corresponding service network through microwave splitter branch again with up multipath light signal;
Step 106, transmission unit are implemented the transparent transmission and the distribution of light signal, downlink optical signal is amplified through light/electric conversion, signal of telecommunication compensation, after becoming light signal by electricity/optical transducer again, be divided into the identical multipath light signal of parameters through optical branching device, these multipath light signals are to handle to form under the condition with high s/n ratio and high-transmission energy; Simultaneously, up multipath light signal is become the signal of telecommunication through light/electric conversion respectively, and synthetic one tunnel multi-service signal of telecommunication, after amplifying, compensation becomes one road light signal by electricity/light conversion again, deliver to the fiber transmission link of information source side;
Step 107, user business interface unit are implemented the user multi-service butt joint, will contain the downlink optical signal of multi-service information, become the signal of telecommunication by light/electric conversion, after filtering, compensation are amplified, deliver to antenna radiation with no damage by duplexer and give user terminal again; Simultaneously, up multi-service radiofrequency signal ECDC road, compensation amplification, electricity/light conversion are become one road light signal, deliver to the fiber transmission link of information source side;
Step 108, employing directly are integrated in the radio-frequency antenna on the user business interface unit, or implement the covering and the distribution of wireless signal by the external radio-frequency antenna that radio frequency feed line connects.
Fig. 2 is for adopting a kind of tree topology figure that can carry net area information user FSAN network that realizes with upper type, and this network specifically comprises:
Be used for the service set unit that various information service networks are concentrated tandem as professional contact; Be used in net area, finishing to the transmission of all information services and distributed function as transmission node, the transmission unit (branch one-level, secondary or more multistage) of the cascaded message that can continue expansion distributed points; And the various forms of signals that produced towards various information services terminal equipments, the miscellaneous service that the guard station information user is required is linked into the user business interface unit of the far-end information access point (user node) of residence network; Connect the optical fiber of these unit as transmission medium, have many good characteristics such as ultra broadband, super low consumption, low cost.
In Fig. 2, the tandem of various information sources is implemented in the service set unit of information source side; Transmission unit 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 cluster, apartment or office building, its final stage transmission node is implemented user's tandem, the area of coverage is not established multistage transmission contact on a small scale, and directly implements user's tandem by one-level transmission contact; The user business interface unit of user side is implemented light/electrical signal conversion, converts the light signal that is sent to this node to radiofrequency signal, delivers to a day alignment user terminal and radiate, or receive the conversion that the customer service signal is implemented inverse process.
The equipment disposition amount is decided by user's request, can realize connecting flexibly of different scales Access Network.In station access network on a small scale, implement user's tandem by the one-level transmission unit; In fairly large station access network, then implement user's tandem by secondary (or multistage) transmission unit.
User node is as far as possible near local customer.Because optical fiber has the super low consumption characteristic, can make service node near information source, and make user node, thereby can expand the coverage area near the user.In addition, adopt optical fiber to make transmission medium, have ultra broadband, super low consumption, advantage cheaply.
Service node is as far as possible near information source.Be provided with the multi-service signal combiner in its information source side, be used to implement diverse network and merge.Be that the miscellaneous service signal is transformed into all in 500kHz～3GHz ultratvide frequency band scope that (non-radiofrequency signal such as data is modulated, frequency translation, move in this baseband) corresponding radiofrequency signal, be input to the service signal mixer of service node information source side, be merged into one road ultra-wide band radio-frequency signal, be transformed into light signal again and export along separate routes.
For further understanding the principle of the technology of the present invention method, illustrate with system construction drawing shown in Figure 3.Fig. 3 is the system equipment structure chart of access network that can bearing all information services of local customer in the embodiments of the invention.Wherein, S
1, S
2... S
nThe expression information source.This system comprises:
ATT is a microwave attenuator, is used for adjusting to the level of information source radiofrequency signal unanimous on the whole.
The service set unit 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; Electricity/optical transducer 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 fiber.The processing of upward signal comprises at least: a plurality of light/electric transducers 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 radio service signal that one tunnel the signal of telecommunication is divided into different frequency range, is sent corresponding base station.The structure of service set unit as shown in Figure 4.
Transmission unit 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: light/electric transducer becomes downlink optical signal into the signal of telecommunication; Signal of telecommunication compensation processor compensates amplification to the signal of telecommunication; Electricity/optical transducer is a light signal with electrical signal conversion; Optical branching device is divided into identical maximum 8 road light signals with one road light signal and delivers to next stage transmission unit or user business interface unit.The processing of upward signal comprises at least: a plurality of light/electric transducers become maximum 8 road light signals corresponding multi-channel electric signal respectively; The multiple signals mixer is in order to synthesize one road signal of telecommunication with maximum 8 road signals of telecommunication; Signal of telecommunication compensation processor is with described one road signal of telecommunication compensation deals; Electricity/optical transducer becomes light signal with one road converting electrical signal, serves grade transmission unit or service set unit.The structure of transmission unit as shown in Figure 5.
User business interface unit converts light signal to radiofrequency signal, delivers to a day alignment user terminal and radiate.Wherein, the processing at downstream signal comprises at least: light/electric transducer, the light signal that is used for receiving carry out light/electricity conversion; Downstream filter is used to leach the downlink electrical signal; Descending compensated amplifier compensates amplification with the downlink electrical signal; Frequency diplexer is used for the uplink and downlink frequency separately, and wherein the downlink electrical signal is delivered to microwave antenna; Microwave antenna is used for the described downlink radio frequency signal of telecommunication is radiated receiving terminal.Downstream filter leaches the downlink electrical signal, and duplexer carries out shunt with the uplink and downlink signal of telecommunication, takes their own roads.Processing on up direction comprises at least: microwave antenna, be used for the rf signal that receiving terminal sends, and deliver to duplexer; Duplexer is used for the uplink and downlink signal separately, and wherein uplink electrical signals is delivered to up compensated amplifier; Up compensated amplifier is used for uplink electrical signals is compensated amplification; Upstream filter is used to leach uplink electrical signals; Electricity/optical transducer is used for up rf signal is converted to light signal, and delivers to transmission unit or service set unit by Optical Fiber Transmission.The function of user business interface unit as shown in Figure 6.
ANT is a microwave antenna, as the part of user business interface unit, is used for the radiated radio frequency (RF) signal.Upward signal is delivered to electricity/optical transducer and is become light signal after being received by antenna, delivers to the final stage transmission unit again.
In above system, because the ultra broadband service signal mixer of 500kHz～3GHz and the ultra wideband transmissions characteristic of optical fiber can provide huge information to insert and the transmission capacity; Because Optical Fiber Transmission is disturbed little, the service set unit makes its micropower that works in about 0dBm export near information source, and the super low consumption transmission characteristic of optical fiber and user business interface unit make its terminal power amplifier output only need about 15dBm near user terminal, the assurance system noise is little, thereby have higher signal-to-noise performance, thereby guarantee Network Transmission signal quality height; The network design standard, node device is unified standard, and node device is realized simple, and transmission medium is with low cost, and network engineering construction tissue is convenient to standard, and these standardization reduce network construction cost significantly.
The effect that these characteristics produced be exactly for the net area user build the unified high-quality 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.
Fig. 7 is the process flow figure that carries downstream signal in the information user's FSAN of guard station in the embodiment of the invention.Specifically may further comprise the steps:
Each microwave attenuator ATT that step 701, adjustment are connected with information source, make the level of RF signals of a plurality of information sources unanimous on the whole after, deliver to service set unit information source side corresponding input end.
Step 702, the radiofrequency signal of multiple communication standard is closed the road, move non-radiofrequency signals such as data-signal to 500kHz～3GHz frequency range through modulators modulate and frequency translation simultaneously, and close the road with above-mentioned each signal by passive microwave signal combiner; Then the signal that merges is carried out electricity/light conversion, become light signal after the output of optical branching device demultiplexing light signal.
The light signal of step 703, multichannel output is delivered to the one-level transmission unit via optical fiber respectively.
Process light/electric the conversion in the one-level transmission unit respectively of step 704, each road light signal becomes the signal of telecommunication and carry out electricity/light conversion again after compensation deals, becomes light signal again after optical branching device output.
The light signal of step 705, each road output is delivered to the secondary transport unit via optical fiber respectively.
Step 706, each road light signal through light/electric conversion, become the signal of telecommunication in corresponding secondary transport unit, the signal of telecommunication carries out electricity/light conversion after treatment, becomes light signal again after optical branching device is exported along separate routes.
As previously mentioned, the equipment disposition amount is here decided by user's request, determines whether needs one-level, secondary or more multistage transmission unit according to number of users.
Step 707, every road light signal are delivered to corresponding user business interface unit via optical fiber.
Step 708, in user business interface unit, light signal is delivered to corresponding antenna through radio frequency cable after light/electric conversion reverts to radiofrequency signal, the user terminal of this area of coverage is given in radiation.
Upward signal flow process and downstream signal flow process are similar, and be basic identical in other words.Its main difference need in service set unit and the transmission unit to be a plurality of light/electric transducers, and the multichannel uplink optical signal of each unit input is carried out light/electric conversion respectively earlier, is merged into one road rf signal through mixer after becoming the signal of telecommunication.In the service set unit, this road synthetic signal of telecommunication becomes the radiofrequency signal of different frequency range to deliver to corresponding information source network by the service signal demultiplexer separates after compensation deals; In transmission unit, this road synthetic signal of telecommunication becomes the output of one road light signal through electricity/light 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 (9)
1. a method that realizes the station access network of beared information user full-service is characterized in that, comprising:
The user resident Access Network is set to a tree network topological structure with multistage transmission node, and wherein each transmission node information capacity equates, and all nodes in this Access Network are divided three classes: service node, transmission node and user node;
Select 500kHz～3GHz whole frequency band to carry whole guard station information user's full-service radiofrequency signal carrier wave;
Adopt the carrier of light wave as full-service information in whole station access network network 500kHz～3GHz frequency range.
2. method according to claim 1, it is characterized in that, the transmission equipment side of the service set unit on the described service node, the transmission equipment side of the user business interface unit on all user nodes, and the both sides of the transmission unit on each transmission node, all adopt optical interface, make whole station access network realize full Optical Fiber Transmission.
3. method according to claim 2, it is characterized in that the information source side in described service set unit is provided with microwave and closes the road network network, realize the tandem of descending full-service radiofrequency signal, and the signal that will close behind the road converts light signal to by electricity/light conversion, again through optical branching device demultiplexing light signal; Simultaneously, respectively after light/electric conversion becomes the signal of telecommunication, synthetic one the tunnel contains the signal of telecommunication of net area information user full-service with up multipath light signal, gives the corresponding business network through the microwave splitter respectively after along separate routes again.
4. method according to claim 2, it is characterized in that, described transmission unit is implemented the transparent transmission and the distribution of light signal, downlink optical signal is amplified through light/electric conversion, signal of telecommunication compensation, after becoming light signal by electricity/optical transducer again, be divided into the identical multipath light signal of parameters through optical branching device; Simultaneously, convert up multipath light signal to the signal of telecommunication through light/electric conversion respectively, and synthetic one tunnel multi-service signal of telecommunication, after amplifying, compensation converts one road light signal to by electricity/light conversion again, deliver to the fiber transmission link of information source side.
5. according to claim 2,3 or 4 described methods, it is characterized in that, described user business interface unit is implemented the user multi-service butt joint, the downlink optical signal that will contain multi-service information becomes the signal of telecommunication through light/electric conversion, after filtering, compensation are amplified, deliver to antenna radiation with no damage by duplexer and give user terminal again; Simultaneously, up multi-service radiofrequency signal ECDC road, compensation amplification, electricity/light conversion are become one road light signal, deliver to the fiber transmission link of information source side;
6. method according to claim 5 is characterized in that, this method further comprises:
Adopt radio-frequency antenna that directly is integrated on the business interface unit or covering and the distribution of implementing wireless signal by the external radio-frequency antenna that radio frequency feed line connects.
7. method according to claim 1 is characterized in that, this method further comprises:
The rf signal tandem that one or more information source is sent merges, and is converted to light signal and is transferred to one or more user business interface units by optical fiber and/or transmission unit in the back along separate routes; Described one or more user business interface units carry out light/electricity conversion and signal processing with the light signal that receives, and become rf signal and arrive user terminal by aerial radiation;
One or more user business interface units will carry out the conversion of electricity/light by the signal of telecommunication that antenna receives respectively, transmit by optical fiber and/or transmission unit after being converted to the light signal a road or a tunnel or more; One road or one road above light signal of input is converted to rf signal respectively, and behind synthetic one road signal of telecommunication, the professional rf signal that is divided into different frequency range is delivered to corresponding information source.
8. method according to claim 7 is characterized in that, when transmitting by transmission unit, 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 uplink optical 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.
9. according to claim 7 or 8 described methods, it is characterized in that this method further comprises:
The level of the downlink radio frequency signal of telecommunication is adjusted into unanimity.
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Application publication date: 20100825 |