CN203554691U - Node B base station subsystem structure - Google Patents
Node B base station subsystem structure Download PDFInfo
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- CN203554691U CN203554691U CN201320524648.XU CN201320524648U CN203554691U CN 203554691 U CN203554691 U CN 203554691U CN 201320524648 U CN201320524648 U CN 201320524648U CN 203554691 U CN203554691 U CN 203554691U
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Abstract
The utility model discloses a Node B base station subsystem structure, comprising an indoor carrier unit (BCU), a transmission optical fiber and an optical fiber radio remote unit (ORRU). The indoor carrier unit (BCU) comprises a Iub interface board, a master clock, a GPS (Global Position System) receiver, baseband processing, digital intermediate frequency processing, radio frequency signal receiving and sending, and optical coherence modulation-demodulation; and the optical fiber radio remote unit (ORRU) comprises optical coherence modulation-demodulation, wave filter, radio frequency amplification and an antenna. The Node B base station subsystem structure disclosed by the utility model has the beneficial effects of reducing the noise accumulation, lowering the overall networking cost, reducing the transmission time delay, and the like.
Description
Technical field
The utility model relates to Information & Communication Technology field, is specifically related to a kind of group-network construction of communication network.
Background technology
Along with further developing of TD-SCDMA, TD-LTE, for domestic mobile operator, exist site resource to be difficult to the problem obtaining, leased land expense is higher.Particularly, can rent the place of putting antenna, be difficult to rent machine room.Such as, the roof in possible Yi Zuo building is applicable to the antenna of mounted base station, but machine room cannot be rented in Zhe Zuo building, or may only have basement may rent machine room.Like this, machine room is distant from the distance of antenna, if use feeder, loss ratio is larger.
Based on this, now based on baseband pool framework, the Node B system that RRU far puts (Node B is the address of the arrival mobile base station of 3G network) has started to dispose.And current BBU(Building Base band Unit, indoor baseband processing unit)+RRU(Radio Remote Unit, Remote Radio Unit) group-network construction is one of solution of TD-SCDMA indoor signal compartment system.
When solving TD-SCDMA indoor signal compartment system, there is following problem in BBU+RRU group-network construction:
1.RRU end equipment is complicated, uses A/D, D/A, fpga chip, and cost is higher;
2.RRU end volume is large, and power consumption is larger, and heat dissipation problem need to be considered emphatically;
3.RRU end is used digital frequency conversion to process increase time delay, increases up-downgoing and switches difficulty;
4. digital processing technology takies massive band width resource, and TE-LTE network is particularly evident.
Utility model content
The utility model object is to provide a kind of novel Node B base station sub-system framework, can simplify far end radio frequency host machine part, reduces whole networking cost; Reduce Chirp from Optical Sources, reduce noise cumulative; Digital processing part all concentrates on indoor carrier wave unit (BCU, Building Carrier Unit), reduces propagation delay time; Reduce up low noise, reduce uplink interference, can realize multi-channel rf and zoom out distribution; In engineering, be conducive to arrange net fast, reduce quantities, reduce difficulty of construction.The purpose of this utility model is realized by following technical scheme:
A Node B base station sub-system framework, comprising: indoor carrier wave unit, Transmission Fibers, optical fiber radio frequency extension unit; It is characterized in that, indoor carrier wave unit comprises: Iub interface plate, master control and the clock being linked in sequence, baseband processing unit, Digital IF Processing unit, the GPS receiver being connected with clock with master control, and at least one group of RF signal receiving and s ending unit and light coherent modulation/demodulation unit; Optical fiber radio frequency extension unit comprises: at least one group of light coherent modulation/demodulation unit, filtering processing and radio frequency amplifying unit and antenna.
As further technical scheme, described optical fiber all adopts single mode single-core fiber, and the optical cable of its genus is composite cable, possesses direct current supply function.
As further technical scheme, described smooth coherent modulation/demodulation unit is light transmitting, receives integrated coherent phase modulation demodulation emission and reception module.
As further technical scheme, described antenna is space diversity transmitting, reception antenna.
The beneficial effects of the utility model are:
1. utilize the coherent modulation/demodulation technology of light, reduce Chirp from Optical Sources, reduce noise cumulative;
2. simplify far end radio frequency host machine part, reduce whole networking cost;
3. digital processing part all concentrates on BCU, greatly reduces propagation delay time;
4. reduce up low noise, reduce uplink interference, can realize multi-channel rf and zoom out distribution;
5. in engineering, be conducive to arrange net fast, reduce quantities, reduce difficulty of construction;
6. optical fiber remote power supply is provided, solves Remote feeding problem;
7.ORRU diversity reception, improves uplink receiving sensitivity;
8.ORRU monitoring of tools information passback BCU focuses on, and reduces ORRU monitor message and processes load.
Accompanying drawing explanation
The organigram of the Node B base station sub-system framework that Fig. 1 provides for the utility model embodiment.
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
Embodiment
As shown in Figure 1, the Node B base station sub-system framework that the present embodiment provides, comprising: indoor carrier wave unit (BCU, Building Carrier Unit), Transmission Fibers, optical fiber radio frequency extension unit (ORRU, Optical Radio Remote Unit).Indoor carrier wave unit (BCU) comprises the parts such as Iub interface plate, master clock, GPS receiver, Base-Band Processing, Digital IF Processing, RF signal receiving and s ending, light coherent modulation/demodulation; Optical fiber radio frequency extension unit (ORRU) comprises the parts such as light coherent modulation/demodulation, filtering, radio frequency amplification, antenna.
Down link: receive the data message sending from radio network controller (RNC) by Iub interface board, under master control and clock integrated circuit boards (clock employing gps clock) control, enter baseband processing unit, data message is carried out to agreement to be unpacked, change into baseband signal, baseband signal is passed through radio frequency receiver unit after Digital IF Processing again, digital medium-frequency signal is mixed to communication radio frequency frequency range, generate communication radio frequency carrier signal, radio-frequency carrier signal is by light coherent modulation/demodulation unit, LASER Light Source is carried out to phase place external modulation, generate optical carrier, optical carrier is sent to ORRU and holds by possessing monomode fiber in the composite cable of remote power feeding.Optical carrier arrives after ORRU end, light coherent modulation/demodulation unit carries out the phase demodulating of light to optical carrier, demodulation radio-frequency carrier signal out amplifies by filtering noise reduction process and radio-frequency power, through diversity dual-mode antenna to spatial emission radio wave (terminal equipment of finding nearby).
Near up link: the radio wave that the diversity dual-mode antenna of ORRU equipment receives, terminal equipment had been launched, through filtering noise reduction process and radio-frequency power, be amplified into light coherent modulation/demodulation unit and LASER Light Source carried out to the phase place external modulation of light, optical carrier after modulation is sent to BCU and holds by possessing monomode fiber in the composite cable of remote power feeding, relevant modem module by light carries out the phase demodulating of light to optical carrier, demodulation radio-frequency carrier signal out carries out Frequency mixing processing by radio frequency receiver unit to radio-frequency carrier signal, obtain the intercarrier signal of simulation, the intercarrier signal of simulation is under master control and clock integrated circuit boards (clock employing gps clock) control, pass through successively Digital IF Processing unit, baseband processing unit completes Digital IF Processing, after base band signal process, by Iub interface board, data message is sent on radio network controller (RNC) again.
The beneficial effects of the utility model are:
1. utilize the coherent modulation/demodulation technology of light, reduce Chirp from Optical Sources, reduce noise cumulative;
2. simplify far end radio frequency host machine part, reduce whole networking cost;
3. digital processing part all concentrates on BCU, greatly reduces propagation delay time;
4. reduce up low noise, reduce uplink interference, can realize multi-channel rf and zoom out distribution;
5. in engineering, be conducive to arrange net fast, reduce quantities, reduce difficulty of construction;
6. optical fiber remote power supply is provided, solves Remote feeding problem;
7.ORRU diversity reception, improves uplink receiving sensitivity;
8.ORRU monitoring of tools information passback BCU focuses on, and reduces ORRU monitor message and processes load.
Claims (4)
1. a Node B base station sub-system framework, comprising: indoor carrier wave unit, Transmission Fibers, optical fiber radio frequency extension unit; It is characterized in that, indoor carrier wave unit comprises: Iub interface plate, master control and the clock being linked in sequence, baseband processing unit, Digital IF Processing unit, the GPS receiver being connected with clock with master control, and at least one group of RF signal receiving and s ending unit and light coherent modulation/demodulation unit; Optical fiber radio frequency extension unit comprises: at least one group of light coherent modulation/demodulation unit, filtering processing and radio frequency amplifying unit and antenna.
2. Node B base station sub-system framework according to claim 1, is characterized in that, described optical fiber all adopts single mode single-core fiber.
3. Node B base station sub-system framework according to claim 1, is characterized in that, described smooth coherent modulation/demodulation unit is light transmitting, receives integrated coherent phase modulation demodulation emission and reception module.
4. Node B base station sub-system framework according to claim 1, is characterized in that, described antenna is space diversity transmitting, reception antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320524648.XU CN203554691U (en) | 2013-08-26 | 2013-08-26 | Node B base station subsystem structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320524648.XU CN203554691U (en) | 2013-08-26 | 2013-08-26 | Node B base station subsystem structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203554691U true CN203554691U (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320524648.XU Expired - Fee Related CN203554691U (en) | 2013-08-26 | 2013-08-26 | Node B base station subsystem structure |
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| CN (1) | CN203554691U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106209124A (en) * | 2016-09-09 | 2016-12-07 | 桂林电子科技大学 | A kind of antenna assembly of integrated RF front-end circuit |
-
2013
- 2013-08-26 CN CN201320524648.XU patent/CN203554691U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106209124A (en) * | 2016-09-09 | 2016-12-07 | 桂林电子科技大学 | A kind of antenna assembly of integrated RF front-end circuit |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140416 Termination date: 20190826 |
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| CF01 | Termination of patent right due to non-payment of annual fee |