CN204465877U - The light expanding unit of multi-service compartment system - Google Patents
The light expanding unit of multi-service compartment system Download PDFInfo
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- CN204465877U CN204465877U CN201520133725.8U CN201520133725U CN204465877U CN 204465877 U CN204465877 U CN 204465877U CN 201520133725 U CN201520133725 U CN 201520133725U CN 204465877 U CN204465877 U CN 204465877U
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Abstract
Several light expanding units the utility model discloses a kind of light expanding unit of multi-service compartment system, described multi-service compartment system comprises at least one access device be connected with base station, being connected by up optical cable, descending optical cable with each access device, m the cladding system be connected by up optical cable, descending optical cable with each smooth expanding unit; Comprise the main photoelectric conversion module be connected with access device, the m be connected respectively by up optical cable and m cladding system from photoelectric conversion module, up conjunction road module, descending shunt module, upstream radio-frequency processing module, downlink radio frequency processing module, FSK communication module, control module, the main electrooptic conversion module that is connected with access device.The utility model has the reliability that improve communication; Time delay is little, the feature that downloading rate is high.
Description
Technical field
The utility model relates to mobile communication technology field, especially relates to the light expanding unit of the little multi-service compartment system of a kind of time delay.
Background technology
The development of mobile communication technology brings more and more higher transmission rate, but also brings more challenge to operator simultaneously.Along with the granting of LTE licence plate, the demand of operator's construction and maintenance can be summed up as Multi net voting support and Supporting multi-services.Multi net voting support is that GSM, TD-SCDMA and LTE multiple network coexists.Because the network technology feature of each standard has very big-difference, internetwork interference level can become one of multi-network coexisted most important index.Supporting multi-services refers to the necessary carry voice traffic simultaneously of network, short message service, the multiple business types such as data service.Multi net voting support and Supporting multi-services are mutually related, in Multi net voting situation, LTE network is owing to have employed packet-switch technology and larger transmission bandwidth, data service has larger advantage, and GSM network belongs to narrowband network, adopt circuit switching and packet switching and deposit, voice and short message service have greater advantages, and TD-SCDAM falls between.China does not also possess at present the IPization (or claiming the whole network IPization) of speech business, and terminal most employing transition scheme CSFB technology and multimode pair treat technology, thus operator to Multi net voting support and Supporting multi-services demand more obvious.
For the network depth meeting operator covers demand, communications equipment vendor is proposed multi-service distribution (MDAS) system product, and MDAS system generally adopts three-decker:
ASS: access device, is positioned at base station or RRU side, and coupling uplink and downlink signals, completes the access of multi-modulation scheme signal;
ESS: expanding unit, becomes multichannel by the multi-modulation scheme signal extension that ASS accesses;
RSS: cladding system, amplifies the multi-modulation scheme signal of access, completes coverage effect;
A general ASS device Supporting connectivity 4 or 8 ESS devices, an ESS system Supporting connectivity 8 or 16 RSS devices, and ESS system supports cascade.Because RSS device packing density is far above base station, so MDAS system generally adopts micropower to launch, general 25 ~ 27dBm.
Common MDAS system can regard continuity and the upgrading of digital optical fiber direct station as, and all based on digital scheme, topmost feature carries out digital-to-analogue and analog-to-digital conversion to wireless signal, transmission of digital signals between the devices.
The downstream signal handling process of common MDAS system:
In ASS device, downstream signal, through radio frequency processing and down-conversion, converts analog intermediate frequency signal (center frequency point 100 ~ 200MHz) to, facilitates ADC chip to sample; Digital signal after the sampling of ADC chip, after Digital Signal Processing and framing are carried out in fpga chip inside, carries out high speed serial parallel exchange and electro-optic conversion by Serdes and optical module, is transformed into light signal and sends;
In ESS device, with ASS device connection side, by optical module and Serdes, light signal is transformed into parallel digital signal; With RSS device connection side, by Serdes and optical module, parallel digital signal is transformed into light signal; The fpga chip of ESS device inside carries out solution frame successively to digital signal, the process such as framing and descending expansion distribution;
In RSS device, by optical module and Serdes, light signal is transformed into parallel digital signal, carries out solution frame and Digital Signal Processing in inside, be transformed into analog if signal through DAC chip, then through up-conversion and radio frequency processing, sent by antenna;
As can be seen from above-mentioned signal processing flow, although common MDAS have employed difference transceiver comparatively ripe at present and Sampling techniques, also there is following shortcoming:
Link design is comparatively complicated, needs Up/Down Conversion circuit;
The frequency range of current TDD-LTE commercialization is 60MHz to the maximum, and according to nyquist sampling law and engineering experience, corresponding sampling rate is minimum is 60M*2.5=150MHz, like this to fpga chip, ADC chip, DAC chip and optical module are proposed higher index request, add system cost;
The solution frame that the digital signal transmitted is carried out in fpga chip inside and framing process, add Time Delay of Systems, and Time Delay of Systems is to covering radius, multi-path jamming and cell merge all have a significant impact.
RoF technology is emerging wireless access technology optical fiber communication and radio communication combined grown up, transmitting terminal passes through wireless signal directly modulation on the laser of certain wavelength, optical fiber link transmits, and receiving terminal recovers respective wireless signal by electrooptical device.The multi-service compartment system (MDAS) of RoF technology is adopted to have the following advantages:
Propagation delay time is minimum, and covering radius increases, and effectively solves multi-path jamming problem, is conducive to the index such as cell merge and downloading rate.
Transmission bandwidth is very wide, and can comprise whole bandwidth of current Multi net voting, hardware compatibility is strong.
Chinese patent mandate publication number: CN1829180, authorize publication date on September 6th, 2006, disclose a kind of network-switching equipment, comprise: connection device management table, the information relevant with the Wireless Communication Equipment that the multiple wireless access devices forming wireless network respectively connected commonly is managed on above-mentioned wireless network; Equipment side communication unit, receives the signal of the Wireless Communication Equipment wireless transmission be connected to; Transmit Target Wireless access device determining means, utilize above-mentioned connection device management table, determine the wireless access device that the transmission target of the signal received with the said equipment side communication unit is connected; Signal holding unit, keeps one or more Frame to each wireless access device that above-mentioned transmission Target Wireless access device determining means determines.The weak point of this invention is, function singleness, does not have the function reducing time delay.
Summary of the invention
Goal of the invention of the present utility model is the use restriction caused more greatly to overcome common MDAS Time Delay of Systems of the prior art, provides the light expanding unit of the little multi-service compartment system of a kind of time delay.
To achieve these goals, the utility model is by the following technical solutions:
A light expanding unit for multi-service compartment system, described multi-service compartment system comprises at least one access device be connected with base station, several light expanding units of being connected by up optical cable, descending optical cable with each access device, m cladding system being connected by up optical cable, descending optical cable with each smooth expanding unit; Comprise the main photoelectric conversion module be connected with access device, the m be connected respectively by up optical cable and m cladding system from photoelectric conversion module, up conjunction road module, descending shunt module, upstream radio-frequency processing module, downlink radio frequency processing module, FSK communication module, control module, the main electrooptic conversion module be connected with access device and the m that is connected respectively by descending optical cable and m cladding system individual from electrooptic conversion module;
Main photoelectric conversion module, downlink radio frequency processing module and descending shunt module are electrically connected successively; M is all electrically connected with up conjunction road module from photoelectric conversion module; The signal output part of downlink radio frequency processing module, FSK communication module, up conjunction road module are electrically connected successively; Up conjunction road module, upstream radio-frequency processing module, main electrooptic conversion module are electrically connected successively; Descending shunt module is electrically connected from electrooptic conversion module with m respectively;
Control module is electrically connected with FSK communication module, upstream radio-frequency processing module and downlink radio frequency processing module respectively.
Several light expanding units that multi-service compartment system of the present utility model comprises at least one access device be connected with base station, be connected by up optical cable, descending optical cable with each access device, several cladding systems be connected by up optical cable, descending optical cable with each smooth expanding unit, System Expansion is convenient, access device completes the access of multisystem signal, maximum Supporting connectivity 4 light expanding units, can realize the telemanagement to light expanding unit and cladding system by network management system; Light expanding unit complete to the conjunction road of downstream transmission signal with along separate routes, every platform light expanding unit can maximum support 8 cladding systems, and light expanding unit supports cascade, supports to carry out remote feeding electricity to cladding system; Cladding system completes the transmitting and receiving of each standard signal, adopts built-in antenna integrated design convenient construction.
In access device, the downstream signal of multisystem, through radio frequency processing, after closing road, is directly light signal by laser modulation with other network downstream signals;
In light expanding unit, with access device connection side, demodulate radiofrequency signal by PIN pipe, with cladding system connection side, radiofrequency signal is along separate routes directly light signal by laser modulation, and radiofrequency signal only needs in light expanding unit inside to amplify and process along separate routes;
In cladding system, the radiofrequency signal demodulated by PIN pipe, by going out from antenna transmission after radio frequency processing;
Compared with the downstream signal handling process of common MDAS system, present invention eliminates ADC, DAC, the unit such as protocol processes, radiofrequency signal is in systems in which according to light velocity propagation, and propagation delay time is minimum, is about for 100 nanoseconds.Upward signal processing procedure has equally and eliminates ADC, DAC, the unit such as protocol processes, and radiofrequency signal is in systems in which according to light velocity propagation, and propagation delay time is minimum, is about the feature of 100 nanoseconds.And the time delay of current common MDAS system is all in microsecond rank.
The downstream signal that access device transmission comes by the utility model is m road downstream signal along separate routes, the upward signal of m road cladding system is carried out conjunction road, and is transferred to access device; Support to carry out 48V feed to cladding system, support the communication with access device.
Therefore, the utility model tool has the following advantages:
Increase MDAS equipment in a network, be equivalent to and introduce multipath signal between terminal and base station, less time delay makes the delay inequality between multipath signal diminish, and facilitates search and the demodulation of base band, improves the reliability of communication;
In single channel LTE situation, downloading rate can reach about 50Mbps, and in binary channels LTE situation, downloading rate can reach about 100Mbps.
As preferably, described control module comprises NUC100 processor, K24LC32 memory and FC-135A950C crystal oscillator; NUC100 processor is electrically connected with K24LC32 memory and FC-135A950C crystal oscillator respectively.
As preferably, described m is 8, and described up conjunction road module comprises 7 power combiner devices, signal attenuator and fixed gain amplifiers; 7 power combiner devices are divided into 4 one deck mixers, 2 two layers of mixers and three layers of mixer; 8 signal input parts of 4 one deck mixers are electrically connected with 8 main photoelectric conversion modules respectively, 4 one deck mixers are electrically connected with 2 two layers of mixers respectively, 2 two layers of mixers are electrically connected with three layers of mixer, and the signal output part of three layers of mixer, signal attenuator and fixed gain amplifier are electrically connected successively.
As preferably, upstream radio-frequency processing module and downlink radio frequency processing module include fixed gain amplifier, digital pad, fixed gain amplifier and the power combiner device/splitter be electrically connected successively; Control module is electrically connected with digital pad.
As preferably, the model of described fixed gain amplifier is SBB-5089, and the model of digital pad is PE4302, and the model of power combiner device/splitter is PD1700U03W.
As preferably, FSK communication module comprises arrowband transceiver and the narrow band filter of electrical connection, and arrowband transceiver is electrically connected with control module.
Therefore, the utility model has following beneficial effect:
(1) improve the reliability of communication;
(2) time delay is little, and downloading rate is high, covering radius is wide, handover success rate is high.。
Accompanying drawing explanation
Fig. 1 is a kind of theory diagram of multi-service compartment system of the present utility model;
Fig. 2 is a kind of theory diagram of the present utility model;
Fig. 3 is a kind of circuit diagram of control module of the present utility model;
Fig. 4 is a kind of circuit diagram of up conjunction road of the present utility model module;
Fig. 5 is a kind of circuit diagram of descending shunt module of the present utility model;
Fig. 6 is a kind of circuit diagram of downlink radio frequency processing module of the present utility model;
Fig. 7 is a kind of circuit diagram of upstream radio-frequency processing module of the present utility model;
Fig. 8 is a kind of circuit diagram of FSK communication module of the present utility model.
In figure: base station 1, access device 2, light expanding unit 3, cladding system 4, main photoelectric conversion module 5, from photoelectric conversion module 6, up conjunction road module 7, descending shunt module 8, upstream radio-frequency processing module 9, downlink radio frequency processing module 10, FSK communication module 11, control module 12, main electrooptic conversion module 13, from electrooptic conversion module 14, NUC100 processor 15, K24LC32 memory 16, FC-135A950C crystal oscillator 17, power combiner 18, signal attenuator 19, fixed gain amplifier 20, one deck mixer 21, two layers of mixer 22, three layers of mixer 23.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
Embodiment is as shown in Figure 1 a kind of light expanding unit of multi-service compartment system, and multi-service compartment system comprises the access device 2 that base station 1 connects, 4 the light expanding units 3 be connected by up optical cable, descending optical cable with each access device, 8 cladding systems 4 being connected by up optical cable, descending optical cable with each smooth expanding unit;
As shown in Figure 2, light expanding unit comprises the main photoelectric conversion module 5 be connected with access device, 8 that are connected respectively by up optical cable and 8 cladding systems from photoelectric conversion module 6, up conjunction road module 7, descending shunt module 8, upstream radio-frequency processing module 9, downlink radio frequency processing module 10, FSK communication module 11, control module 12, the main electrooptic conversion module 13 be connected with access device and be connected respectively by descending optical cable and 8 cladding systems 8 from electrooptic conversion module 14;
Main photoelectric conversion module, downlink radio frequency processing module and descending shunt module are electrically connected successively; 8 are all electrically connected with up conjunction road module from photoelectric conversion module; The signal output part of downlink radio frequency processing module, FSK communication module, up conjunction road module are electrically connected successively; Up conjunction road module, upstream radio-frequency processing module, main electrooptic conversion module are electrically connected successively; Descending shunt module is electrically connected from electrooptic conversion module with 8 respectively;
Control module is electrically connected with FSK communication module, upstream radio-frequency processing module and downlink radio frequency processing module respectively.
As shown in Figure 3, control module comprises NUC100 processor 15, K24LC32 memory 16 and FC-135A950C crystal oscillator 17; NUC100 processor is electrically connected with K24LC32 memory and FC-135A950C crystal oscillator respectively.
As shown in Figure 4, up conjunction road module comprises 7 power combiner devices 18, digital adjustable attenuator 19 and fixed gain amplifier 20; 7 power combiner devices are divided into 4 one deck mixers, 21,2 two layers of mixers 22 and three layers of mixer 23; 8 signal input parts of 4 one deck mixers are electrically connected with 8 main photoelectric conversion modules respectively, 4 one deck mixers are electrically connected with 2 two layers of mixers respectively, 2 two layers of mixers are electrically connected with three layers of mixer, and the signal output part of three layers of mixer, digital adjustable attenuator and fixed gain amplifier are electrically connected successively.
The circuit diagram of descending shunt module as shown in Figure 5, descending shunt module comprises 7 power combiner devices, digital adjustable attenuator and fixed gain amplifier; 7 power combiner devices are divided into 4 one deck mixers, 2 two layers of mixers and three layers of mixer; 8 signal input parts of 4 one deck mixers are electrically connected with 8 main photoelectric conversion modules respectively, 4 one deck mixers are electrically connected with 2 two layers of mixers respectively, 2 two layers of mixers are electrically connected with three layers of mixer, and the signal output part of three layers of mixer, digital adjustable attenuator and fixed gain amplifier are electrically connected successively.
As shown in Figure 6, Figure 7, upstream radio-frequency processing module and downlink radio frequency processing module include the fixed gain amplifier be electrically connected successively, digital adjustable attenuator, fixed gain amplifier and power combiner device/splitter; Control module is electrically connected with digital pad.
The model of fixed gain amplifier is SBB-5089, and the model of digital adjustable attenuator is PE4302, and the model of power combiner device/splitter is PD1700U03W.
As shown in Figure 8, FSK communication module comprises arrowband transceiver and the narrow band filter of electrical connection, and arrowband transceiver is electrically connected with control module.
The course of work of the present utility model is as follows:
When electrification work starts, control module is according to the operating die in the program information initialization modules stored in its storage chip, and modules is started working according to configuration information.Then control module is in listening state, monitors the monitored instruction exported from FSK communication module, monitors according to instruction to other modules.
Main photoelectric conversion module goes out a signal from the optical signal demodulation that main light port inputs and is input to downlink radio frequency processing module.Signal is divided into 2 tunnels after the process such as amplification, gain control, and a road outputs to descending shunt module, and a road outputs to FSK communication module.The signal 1 received is divided into the 8 identical signals in tunnel by descending shunt module, outputs to 8 from electrooptic conversion module.The signal of telecommunication be input in respective module is modulated to light signal by 8 electrooptic conversion modules, exports from 8 from light mouth.
Meanwhile, 8, from photoelectric conversion module from 8 of correspondence receiving optical signals from light mouth, demodulate the 8 road signals of telecommunication and output to up conjunction road module.Up conjunction road module is combined into 1 tunnel by from 8 from 8 road unlike signals of photoelectric conversion module, outputs to upstream radio-frequency processing module.In uplink processing module, from the signal of up conjunction road module input with after closing road from the signal of FSK communication module input, after the process such as amplification, gain control, output to main electrooptic conversion module, export from main light port with light signal after modulation at main electrooptic conversion module.
FSK communication module receives the signal from the input of downlink radio frequency processing module, and leach FSK signal of communication by narrow band filter, the signal demodulated containing monitor message through transceiver outputs to control module.Receive the pilot signal of control module feedback simultaneously, become FSK signal of communication by transceiver modulates, output to upstream radio-frequency processing module.
The course of work of the present utility model mainly extracts FSK signal of communication from 1 road light signal of main light port, is divided into 8 roads to export from from light mouth main light port 1 road light signal simultaneously.Meanwhile, the 8 road light signals inputted from light mouth are merged 1 tunnel to export from main light port together with fsk signal.
Should be understood that the present embodiment is only not used in restriction scope of the present utility model for illustration of the utility model.In addition should be understood that those skilled in the art can make various changes or modifications the utility model, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the utility model instruction.
Claims (6)
1. a light expanding unit for multi-service compartment system, described multi-service compartment system comprises at least one access device (2) be connected with base station (1), several light expanding units (3) of being connected by up optical cable, descending optical cable with each access device, m cladding system (4) being connected by up optical cable, descending optical cable with each smooth expanding unit; It is characterized in that, comprise the main photoelectric conversion module (5) be connected with access device, the m be connected respectively by up optical cable and m cladding system from photoelectric conversion module (6), up conjunction road module (7), descending shunt module (8), upstream radio-frequency processing module (9), downlink radio frequency processing module (10), FSK communication module (11), control module (12), the main electrooptic conversion module (13) be connected with access device and the m that is connected respectively by descending optical cable and m cladding system individual from electrooptic conversion module (14);
Main photoelectric conversion module, downlink radio frequency processing module and descending shunt module are electrically connected successively; M is all electrically connected with up conjunction road module from photoelectric conversion module; The signal output part of downlink radio frequency processing module, FSK communication module, up conjunction road module are electrically connected successively; Up conjunction road module, upstream radio-frequency processing module, main electrooptic conversion module are electrically connected successively; Descending shunt module is electrically connected from electrooptic conversion module with m respectively;
Control module is electrically connected with FSK communication module, upstream radio-frequency processing module and downlink radio frequency processing module respectively.
2. the light expanding unit of multi-service compartment system according to claim 1, is characterized in that, described control module comprises NUC100 processor (15), K24LC32 memory (16) and FC-135A950C crystal oscillator (17); NUC100 processor is electrically connected with K24LC32 memory and FC-135A950C crystal oscillator respectively.
3. the light expanding unit of multi-service compartment system according to claim 1, it is characterized in that, described m is 8, and described up conjunction road module comprises 7 power combiner devices (18), signal attenuator (19) and fixed gain amplifier (20); 7 power combiner devices are divided into 4 one deck mixers (21), 2 two layers mixer (22) and one three layers mixer (23); 8 signal input parts of 4 one deck mixers are electrically connected with 8 main photoelectric conversion modules respectively, 4 one deck mixers are electrically connected with 2 two layers of mixers respectively, 2 two layers of mixers are electrically connected with three layers of mixer, and the signal output part of three layers of mixer, signal attenuator and fixed gain amplifier are electrically connected successively.
4. the light expanding unit of multi-service compartment system according to claim 1, it is characterized in that, upstream radio-frequency processing module and downlink radio frequency processing module include fixed gain amplifier, digital pad, fixed gain amplifier and the power combiner device/splitter be electrically connected successively; Control module is electrically connected with digital pad.
5. the light expanding unit of multi-service compartment system according to claim 4, is characterized in that, the model of described fixed gain amplifier is SBB-5089, and the model of digital pad is PE4302, and the model of power combiner device/splitter is PD1700U03W.
6. the light expanding unit of the multi-service compartment system according to claim 1 or 2 or 3 or 4 or 5, it is characterized in that, FSK communication module comprises arrowband transceiver and the narrow band filter of electrical connection, and arrowband transceiver is electrically connected with control circuit.
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