CN101232652B - Base station zoom out system based on number intermediate frequency transmission - Google Patents
Base station zoom out system based on number intermediate frequency transmission Download PDFInfo
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- CN101232652B CN101232652B CN2007100011684A CN200710001168A CN101232652B CN 101232652 B CN101232652 B CN 101232652B CN 2007100011684 A CN2007100011684 A CN 2007100011684A CN 200710001168 A CN200710001168 A CN 200710001168A CN 101232652 B CN101232652 B CN 101232652B
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Abstract
The invention relates to a base station remote system based on digital intermediate frequency transmission and comprises a base-band pool and a radio frequency remote device, wherein the base-band pool comprises a base-band process circuit that is connected by a cabled or wireless physical adapter meeting transmission requirements with at least one radio frequency remote device; moreover, the base-band pool further comprises a digital intermediate frequency process circuit; in the down-stream orientation, the base-band process circuit in the base-band pool sends base-band data to the digital intermediate frequency process circuit to perform digital upper frequency conversion; the digital intermediate frequency data after the digital upper frequency conversion is sent to the radio frequency remote device through the physical adapter; in the up-stream orientation, the radio frequency remote device sends digital intermediate frequency data to the digital intermediate frequency process circuit through the physical adapter, so as to realize digital down frequency conversion; the base-band data after the digital down frequency conversion is sent to the base-band process circuit. The invention moves intermediate frequency process into a base-band pool for integrated process, so as to perform more effective multiplex and optimization of hardware resources. Therefore, the invention has higher cost superiority and flexibility compared with prior framework.
Description
Technical field
The present invention relates to the networking technology in the wireless cellular system, be specifically related to a kind of base station zoom out system based on the digital intermediate frequency transmission.
Background technology
Base station equipment is in the front end of Access Network in wireless cellular system, base station equipment quantity in whole system is more, and the different designs structure of base station equipment is to the cost of the whole network, the convenience of construction, and the performance of network all has bigger influence.
Base station equipment can be divided into outdoor version base station and indoor type base station according to the environment of applications difference.Divide two kinds of the base station that can be divided into integrated-type and distributed base stations according to the system configuration of base station.The base station of integrated-type is integrated Iub interface, Base-Band Processing, functions such as radio frequency processing are one, realize the function of a complete base station in an equipment machine frame or frame.
Distributed base station is the function of whole base station to be assigned in several equipment finish, and each equipment is finished certain part of functions, between the equipment by optical fiber, cable, transmission means swap data such as wireless.Advantages such as this distributed structure is because of flexible configuration, and is easy for installation, and cost is lower have obtained bigger development in recent years.
The common structure of distributed base station is that baseband pool (BBU) adds radio frequency remote equipment (RRU) two parts, wherein baseband pool is finished work such as Iub interface, Base-Band Processing, radio frequency remote equipment is mainly realized the mutual conversion between base band and the radiofrequency signal, usually the installation site of the close more antenna of radio frequency remote equipment.Between baseband pool and the radio frequency remote equipment by the various wired or wireless transmission of carrying out data and clock that are connected.
Transmit between baseband pool and the radio frequency remote equipment in the existing far-drawing system and mainly pass through dual mode, a kind of is the baseband transmission mode, in the down direction baseband pool base band data is sent to radio frequency remote equipment, the up direction radio frequency remote equipment sends to baseband pool with base band data.Another is the mode that zooms out of analog intermediate frequency, and what transmit between baseband pool and the radio frequency remote equipment is the intermediate-freuqncy signal of simulation.What application was more at present is preceding a kind of mode, i.e. baseband transmission mode.Base band data can transmit larger distance in this manner, and does not have the decay of signal.
Radio frequency remote equipment relatively disperses owing to quantity installation site more, equipment, therefore simplify the function of radio frequency remote equipment as far as possible, reduce the power consumption of radio frequency remote equipment, the reliability that improves radio frequency remote equipment is the subject matter that present far-drawing system need solve.
Summary of the invention
In order to overcome the above problems, the present invention innovates the function framework that existing baseband pool adds the far-drawing system of radio frequency remote equipment, has proposed a kind of novel base station zoom out system based on the digital intermediate frequency transmission.
Of the present inventionly no longer finish the Digital IF Processing function based on radio frequency remote equipment in the base station zoom out system of digital intermediate frequency transmission, the Digital IF Processing function is transferred in the baseband pool and is finished.Radio frequency remote equipment is not the transmission base band data to last coffret, but the transmission of digital intermediate frequency data.
The present invention specifically is achieved in that
A kind of base station zoom out system based on the digital intermediate frequency transmission, comprise baseband pool, radio frequency remote equipment, wherein baseband pool comprises, baseband processing circuitry, be connected by the wired or wireless physical interface that satisfies transmission requirement with at least one radio frequency remote equipment, described baseband pool also comprises, the Digital IF Processing circuit;
At down direction, the baseband processing circuitry in the baseband pool is given the Digital IF Processing circuit with base band data and is carried out Digital Up Convert, and the digital intermediate frequency data after the Digital Up Convert send to radio frequency remote equipment by physical interface;
At up direction, radio frequency remote equipment is given the Digital IF Processing circuit with the digital intermediate frequency data by physical interface, carries out Digital Down Convert, and the base band data after the Digital Down Convert sends to baseband processing circuitry.
Described physical interface is used to finish the format conversion of data and transmission, receiving function, can be light mouth, gigabit ethernet interface;
Cascade be can carry out between the described radio frequency remote equipment, stellate reticulum, chain net or ring network formed.
Described baseband pool can also comprise: the cross over circuit of data, up-downgoing data close the road shunt circuit;
The cross over circuit of described data is finished the interconnection of multichannel data;
Described up-downgoing data close the road shunt circuit, finish the shunt of closing road and downlink data of upstream data;
Baseband processing circuitry in the down direction baseband pool carries out Digital Up Convert with base band data through giving the Digital IF Processing circuit behind the cross over circuit of data, sends to radio frequency remote equipment after the digital intermediate frequency data process data shunt circuit after the Digital Up Convert;
Enter the Digital IF Processing circuit and carry out Digital Down Convert after the up direction radio frequency remote equipment closes the road circuit with up digital intermediate frequency data through data, the base band data after the Digital Down Convert is sent to baseband processing circuitry through interconnection.
The cross over circuit of described data and up-downgoing data close the order scalable of road shunt circuit in circuit.
The closing the road shunt circuit and can be positioned at before or after the Digital IF Processing circuit of the cross over circuit of described data and up-downgoing data.
The cross over circuit of described data and up-downgoing data close the order scalable of road shunt circuit in circuit.
Described radio frequency remote equipment comprises, physical interface, AD/DA circuit and radio circuit;
Described physical interface is finished the digital interface of radio frequency remote equipment to baseband pool, can realize the conversion of data format, carrying up-downgoing digital intermediate frequency data and Monitoring and Controlling data;
Described AD/DA circuit is finished descending digital medium-frequency signal is changed into analog if signal and changes up analog if signal into digital medium-frequency signal;
Described radio circuit, finish the up-conversion, filtering, gain controlling of analog if signal at down direction after, send to antenna; Finish down-conversion, filtering, the gain controlling of analog if signal at up direction.
System of the present invention, the system recofiguration that original baseband pool based on baseband interface is added radio frequency remote equipment is for adding the system configuration of radio frequency remote equipment based on the baseband pool of IF interface, this change has improved the data rate of radio frequency remote equipment to last coffret transmission.
The present invention is simplified the function of radio frequency remote equipment, removed the function of intermediate frequency process, it is simpler that equipment becomes, power consumption is littler, cost is lower, and reliability is higher, from system perspective, intermediate frequency process partly is moved in the baseband pool and focuses on, and can more effectively carry out the multiplexing of hardware resource and optimization.
Be total at a plurality of radio frequency remote equipments under the situation of sub-district, use system architecture of the present invention just can only do Digital IF Processing one time to the up-downgoing data of a sub-district, and in traditional zooming out in the framework, all need in each radio frequency remote equipment independent the up-downgoing data to be carried out Digital IF Processing, the increase at double of employed hardware resource.The present invention has guaranteed ratio bigger cost advantage and the flexibility of framework in the past aspect system architecture.
Description of drawings
Fig. 1 is the present a kind of far-drawing system structure based on baseband interface.
Fig. 2 is the base station zoom out system based on the digital intermediate frequency transmission of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the present a kind of far-drawing system structure based on baseband interface.In this system configuration, what transmit on the physical interface between baseband pool and the radio frequency remote equipment is base band data, and Digital IF Processing is finished in radio frequency remote equipment.
Of the present inventionly no longer finish the Digital IF Processing function based on radio frequency remote equipment in the base station zoom out system of digital intermediate frequency transmission, the Digital IF Processing function is transferred in the baseband pool and is finished.Radio frequency remote equipment is not the transmission base band data to last coffret, but the transmission of digital intermediate frequency data.
System of the present invention comprises baseband pool and radio frequency remote equipment, and radio frequency remote equipment is connected by light mouth, gigabit Ethernet or other wired or wireless physical interfaces that satisfies transmission requirement with baseband pool.One of them baseband pool can link to each other with one or more radio frequency remote equipment, and radio frequency remote equipment also can carry out cascade, thereby forms the network that stellate reticulum, chain net, ring network or above-mentioned basic network topology mix the hybrid architecture that constitutes.
Described radio frequency remote equipment mainly comprises physical interface, AD/DA circuit and radio circuit, described physical interface is finished the digital interface of radio frequency remote equipment to baseband pool, comprises the functions such as conversion of data format, and the content of carrying comprises up-downgoing digital intermediate frequency data and Monitoring and Controlling data.
Described AD/DA circuit is responsible for finishing descending digital medium-frequency signal is changed into analog if signal and changes up analog if signal into digital medium-frequency signal.
Described radio circuit is mainly finished the conversion between the analog signal of up-downgoing analog if signal and antenna receiving-sending, mainly finish the function such as up-conversion, filtering, gain controlling of analog signal at down direction, mainly finish functions such as down-conversion, filtering, gain controlling at up direction.Radio circuit also comprises duplicate circuitry and antennal interface.
Described baseband pool mainly comprises and the interface of base station controller, baseband processing circuitry, clock treatment circuit, Digital IF Processing circuit and and radio frequency remote equipment between parts such as physical interface.
Wherein and the physical interface between the radio frequency remote equipment partly finish the format conversion of data and send receiving function.Described Digital IF Processing circuit is finished the upstream digital intermediate frequency and is arrived the conversion of base band and the conversion that the downgoing baseband data arrive digital medium-frequency signal.
What described baseband pool can also comprise the cross over circuit of data and up-downgoing data closes the road shunt circuit.This two parts circuit is an optional part of the present invention.The cross over circuit of data is finished the interconnection of multichannel data.The up-downgoing data close the shunt function of closing road and downlink data that the road shunt circuit is mainly finished upstream data.This two parts circuit can be positioned at before the Digital IF Processing circuit or afterwards, and the sequencing of this two parts circuit also can be regulated.
Common circuit be in proper order with radio frequency remote equipment between physical interface after be connected the up-downgoing data close the road shunt circuit, be the Digital IF Processing circuit then, be cross over circuit then, be baseband processing circuitry at last.The benefit of doing like this is that the only involutory circuit-switched data of Digital IF Processing circuit is handled, and can reduce the scale of circuit
Fig. 2 is a kind of system configuration that zooms out based on digital intermediate frequency of the present invention, the present invention includes but is not limited thereto kind of a structure.In system configuration shown in Figure 2, what transmit on the physical interface between baseband pool and the radio frequency remote equipment is the digital intermediate frequency data, and Digital IF Processing is finished in baseband pool, and whole system is made up of baseband pool 21 and radio frequency remote equipment 22.What wherein transmit between baseband pool 21 and the radio frequency remote equipment 22 is the digital intermediate frequency data.
After the baseband processing circuitry 212 of down direction baseband pool 21 passes through interconnection 213 circuit with base band data, give Digital IF Processing 214 circuit and carry out Digital Up Convert, send to radio frequency remote equipment 22 after the digital intermediate frequency data process data shunt 215 after the Digital Up Convert.The digital intermediate frequency data are carried out radio frequency processing such as up-conversion and amplification filtering through the DA conversion in radio frequency part 223 and are sent to antenna in radio frequency remote equipment 22.
After carrying out down-converted by radio frequency part 223, the up radiofrequency signal of up direction becomes the digital intermediate frequency data through AD, radio frequency remote equipment 22 is given baseband pool 21 at up direction with the digital intermediate frequency data, and up digital intermediate frequency data are closed through data and entered Digital IF Processing 214 circuit behind the road 216 and carry out Digital Down Convert.Base band data after the Digital Down Convert is sent to baseband processing circuitry 212 through interconnection.
Claims (4)
1. base station zoom out system based on digital intermediate frequency transmission, comprise baseband pool, radio frequency remote equipment, wherein baseband pool comprises, baseband processing circuitry, is connected by the wired or wireless physical interface that satisfies transmission requirement with at least one radio frequency remote equipment, it is characterized in that:
Described baseband pool also comprises, the Digital IF Processing circuit;
At down direction, the baseband processing circuitry in the baseband pool is given the Digital IF Processing circuit with base band data and is carried out Digital Up Convert, and the digital intermediate frequency data after the Digital Up Convert send to radio frequency remote equipment by physical interface;
At up direction, radio frequency remote equipment is given the Digital IF Processing circuit with the digital intermediate frequency data by physical interface, carries out Digital Down Convert, and the base band data after the Digital Down Convert sends to baseband processing circuitry;
Described baseband pool also comprises: the cross over circuit of data, up-downgoing data close the road shunt circuit, the road shunt circuit of closing of the cross over circuit of described data and up-downgoing data is positioned at before or after the Digital IF Processing circuit;
The cross over circuit of described data is finished the interconnection of multichannel data;
Described up-downgoing data close the road shunt circuit, finish the shunt of closing road and downlink data of upstream data;
The cross over circuit of described data and up-downgoing data close the order scalable of road shunt circuit in circuit.
2. the base station zoom out system based on the digital intermediate frequency transmission as claimed in claim 1 is characterized in that:
Described physical interface is used to finish the format conversion of data and transmission, receiving function, can be light mouth, gigabit ethernet interface;
Cascade be can carry out between the described radio frequency remote equipment, stellate reticulum, chain net or ring network formed.
3. the base station zoom out system based on the digital intermediate frequency transmission as claimed in claim 1 or 2 is characterized in that:
Baseband processing circuitry in the down direction baseband pool carries out Digital Up Convert with base band data through giving the Digital IF Processing circuit behind the cross over circuit of data, sends to radio frequency remote equipment after the digital intermediate frequency data process data shunt circuit after the Digital Up Convert;
Enter the Digital IF Processing circuit and carry out Digital Down Convert after the up direction radio frequency remote equipment closes the road circuit with up digital intermediate frequency data through data, the base band data after the Digital Down Convert is sent to baseband processing circuitry through interconnection.
4. the base station zoom out system based on the digital intermediate frequency transmission as claimed in claim 1 or 2 is characterized in that:
Described radio frequency remote equipment comprises, physical interface, AD/DA circuit and radio circuit;
Described physical interface is finished the digital interface of radio frequency remote equipment to baseband pool, can realize the conversion of data format, carrying up-downgoing digital intermediate frequency data and Monitoring and Controlling data;
Described AD/DA circuit is finished descending digital medium-frequency signal is changed into analog if signal and changes up analog if signal into digital medium-frequency signal;
Described radio circuit, finish the up-conversion, filtering, gain controlling of analog if signal at down direction after, send to antenna; Finish down-conversion, filtering, the gain controlling of analog if signal at up direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2007100011684A CN101232652B (en) | 2007-01-22 | 2007-01-22 | Base station zoom out system based on number intermediate frequency transmission |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007100011684A CN101232652B (en) | 2007-01-22 | 2007-01-22 | Base station zoom out system based on number intermediate frequency transmission |
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| CN101232652A CN101232652A (en) | 2008-07-30 |
| CN101232652B true CN101232652B (en) | 2011-06-22 |
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| CN2007100011684A Active CN101232652B (en) | 2007-01-22 | 2007-01-22 | Base station zoom out system based on number intermediate frequency transmission |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2843024T3 (en) | 2009-07-27 | 2021-07-15 | Huawei Tech Co Ltd | Signal transmission processing method and apparatus and distributed base station |
| CN101841935B (en) * | 2010-05-12 | 2013-05-22 | 新邮通信设备有限公司 | Single-antenna remote radio unit |
| CN102457876B (en) * | 2010-10-29 | 2016-06-15 | 中兴通讯股份有限公司 | Also cabinet method and the device of miniaturization base station and Remote Radio Unit |
| CN102035589B (en) * | 2010-11-29 | 2014-04-02 | 大唐移动通信设备有限公司 | Base station, far-end radio frequency unit and signal sending method thereof |
| CN102186265B (en) * | 2011-05-04 | 2013-11-06 | 京信通信系统（中国）有限公司 | Distributed base station and networking method thereof |
| CN102769212A (en) * | 2012-07-24 | 2012-11-07 | 东南大学 | Medium-frequency simulated RoF (radio over fiber) type phase control active integrated antenna |
| CN103139790B (en) * | 2013-01-28 | 2016-08-03 | 福建星网锐捷网络有限公司 | Being applied to room divides the intelligence of WLAN to divide wireless access device, the network equipment |
| CN104427512A (en) * | 2013-08-22 | 2015-03-18 | 中兴通讯股份有限公司 | Networking method and device for distributed base station |
| CN107211480B (en) * | 2015-02-03 | 2020-06-02 | 华为技术有限公司 | Distributed base station and signal transmission method |
| CN106961284B (en) * | 2016-01-08 | 2019-07-19 | 大唐移动通信设备有限公司 | A kind of radio-frequency front-end system, base station |
| CN107343328B (en) * | 2016-04-29 | 2022-03-01 | 中兴通讯股份有限公司 | Distributed base station system |
| CN112636807B (en) * | 2020-12-29 | 2023-02-28 | 京信网络系统股份有限公司 | Baseband remote transmission device, base station, remote coverage unit and wireless coverage system |
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| CN1816181A (en) * | 2005-02-03 | 2006-08-09 | 芯通科技（成都）有限公司 | Middle-frequency transmission method and middle-frequency interface for base-station to realize radio-frequency zoom-out |
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| WO2005011314A1 (en) * | 2003-07-24 | 2005-02-03 | Utstarcom Korea Limited | Method of designing a micro-bts |
| CN1816181A (en) * | 2005-02-03 | 2006-08-09 | 芯通科技（成都）有限公司 | Middle-frequency transmission method and middle-frequency interface for base-station to realize radio-frequency zoom-out |
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