CN101232651A - Radio frequency zoom out equipment - Google Patents
Radio frequency zoom out equipment Download PDFInfo
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- CN101232651A CN101232651A CNA2007100010709A CN200710001070A CN101232651A CN 101232651 A CN101232651 A CN 101232651A CN A2007100010709 A CNA2007100010709 A CN A2007100010709A CN 200710001070 A CN200710001070 A CN 200710001070A CN 101232651 A CN101232651 A CN 101232651A
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Abstract
The invention discloses a radio frequency remote device that comprises a physical adapter, an AD/DA conversion circuit and a radio frequency process circuit connected with upper devices; the physical adapter connected with the upper device receives down-stream digital intermediate frequency signal to perform format conversion before being sent to the AD/DA conversion circuit for being converted into analog intermediate frequency signals; the down-stream analog intermediate frequency signals pass the radio frequency process circuit for filtration and amplification for the upper frequency conversion process being sent out of an antenna; the up-stream radio frequency signals are received by the antenna, amplified and filtrated through the radio frequency process circuit, and then processed through the down-frequency conversion into analog intermediate frequency signals; the up-stream analog intermediate frequency signals pass acquisition through the AD/DA conversion circuit before being changed into the digital intermediate frequency signals; the up-stream digital intermediate frequency signals are treated for format conversion through the physical adapter connected with the upper device, before being processed and sent to the upper device through a physical layer. The invention improves the device reliability and reduces the system cost.
Description
Technical field
The present invention relates to the base station equipment in a kind of mobile radio system, relate in particular to a kind of radio frequency remote equipment.
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 all has bigger influence to the cost of the whole network, the convenience of construction, the performance of network.
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, and functions such as Iub interface, Base-Band Processing, 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.This distributed structure because flexible configuration, easy for installation, cost is lower etc., and advantage has obtained bigger development in recent years.
The common structure of distributed base station is that baseband pool (BBU) adds radio frequency and zooms out (RRU) two parts, and wherein baseband pool (BBU) is finished work such as Iub interface, Base-Band Processing; Radio frequency zooms out the mutual conversion between main realization base band and the radiofrequency signal, usually the installation site of the close more antenna of radio frequency remote equipment (RRU).Between baseband pool (BBU) and the radio frequency remote equipment (RRU) by the various wired or wireless transmission of carrying out data and clock that are connected.
Existing radio frequency remote equipment (RRU) mainly contains two kinds.A kind of radio frequency remote equipment (RRU) that is based on the baseband transmission mode, what transmit on the physical interface of this remote device and baseband pool (BBU) is base band data, carries out Digital IF Processing, AD/DA conversion and analog radio frequency and handle in radio frequency remote equipment (RRU).The radio frequency remote equipment of this structure is used wider at present.Another kind is based on the radio frequency remote equipment (RRU) of analog intermediate frequency, and what transmit on the physical interface of this remote device and baseband pool (BBU) is analog if signal.In radio frequency remote equipment (RRU), finish the last down-conversion of analog signal, the functions such as amplification filtering of signal.A shortcoming of this remote device is that mounting points can not be too far away from baseband pool (BBU) distance, otherwise the analog signal on the interface bigger decay can take place and introduces more noise.
Radio frequency remote equipment (RRU) is because quantity installation site more, equipment relatively disperses, and the reliability of therefore as far as possible simplifying the function of radio frequency remote equipment (RRU), the power consumption that reduces radio frequency remote equipment (RRU), raising radio frequency remote equipment (RRU) is the subject matter that present far-drawing system need solve.
Summary of the invention
Therefore technical problem to be solved by this invention provides a kind of radio frequency remote equipment based on the digital intermediate frequency transmission, and the present invention can the simplified apparatus function, improve equipment dependability, reduce system cost.
The present invention specifically is achieved in that
A kind of radio frequency remote equipment comprises: with physical interface, modulus/D/A converting circuit, the rf processing circuitry of higher level equipment; Receive descending digital medium-frequency signal with the physical interface of higher level equipment, carry out delivering to modulus/D/A converting circuit after the format conversion and be converted to analog if signal, descending analog if signal carries out launching by antenna after upconversion process is amplified in filtering through rf processing circuitry; Up radiofrequency signal is carried out the amplification filtering down-converted by rf processing circuitry and is become analog if signal after antenna receives, up analog if signal is through modulus/D/A converting circuit sampling becoming digital medium-frequency signal, and up digital medium-frequency signal carries out format conversion through the physical interface with higher level equipment and physical layer process is sent to higher level equipment.
Press such scheme, also comprise power circuit and clock circuit.
Owing to adopted such scheme, the present invention compared with prior art has the following advantages:
The present invention simplifies the structure of existing radio frequency remote equipment based on baseband interface, and the Digital IF Processing function of original radio frequency remote equipment indispensability is simplified, and makes the device structure of this terminal type of radio frequency remote equipment obtain sizable simplification.Though this change has improved the data rate of radio frequency remote equipment to last coffret transmission, but obviously has following benefit: at first, the present invention is being simplified aspect Signal Processing flow process and the device structure, removed the intermediate frequency process function of radio frequency remote equipment, thereby functions of the equipments have been simplified, it is more succinct that equipment becomes, and equipment cost and power consumption all are reduced, and reliability has obtained further raising; From system perspective, intermediate frequency process partly is moved in the higher level equipment and focuses on, and can more effectively carry out the multiplexing of hardware resource and optimization.Such as being total at a plurality of radio frequency remote equipments under the situation of sub-district, use radio frequency remote equipment of the present invention just can make their common higher level equipments that the up-downgoing data of a sub-district are only done Digital IF Processing one time, and use traditional radio frequency remote equipment, 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.This shows, use the present invention can be in system-level optimization resource, reduce cost.
Description of drawings
Fig. 1 is the structured flowchart that has now based on the radio frequency remote equipment of baseband interface;
Fig. 2 is a structured flowchart of the present invention.
Embodiment
Below in conjunction with accompanying drawing concrete enforcement of the present invention is further described:
Radio frequency remote equipment based on the digital intermediate frequency transmission of the present invention is no longer finished the Digital IF Processing function, the Digital IF Processing function is transferred in the higher level equipment of radio frequency remote equipment 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 includes: with physical interface, AD/DA change-over circuit, the rf processing circuitry of higher level equipment.Described and physical interface higher level equipment is finished the digital interface of radio frequency remote equipment (RRU) to its higher level equipment, comprises the physical layer function such as conversion of data format.The content that physical interface described and higher level equipment carries comprises up-downgoing digital intermediate frequency data, Monitoring and Controlling data.Described AD/DA change-over 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 rf processing circuitry 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.Rf processing circuitry also comprises duplicate circuitry and antennal interface.
The present invention also comprises: complementary circuit such as power supply, clock.
Fig. 1 is the structured flowchart that has now based on the radio frequency remote equipment of baseband interface.In this equipment, descending base band data is sent in the radio frequency remote equipment by the physical interface with higher level equipment, operations such as Data Format Transform by physical interface, the downgoing baseband data are sent to the Digital IF Processing circuit and carry out the Digital Up Convert processing, descending digital intermediate frequency data after the Digital Up Convert change descending analog if signal into after by the DA conversion, descending analog if signal carries out filtering through radio circuit and amplifies processing such as up-conversion, delivers to antenna opening at last to launch; The processing such as amplification filtering down-conversion by radio circuit after antenna receives of up radiofrequency signal become analog if signal, up analog if signal is through AD sampling becoming digital medium-frequency signal, and up digital medium-frequency signal becomes through the down-converted of Digital IF Processing circuit delivers to that physical interface carries out format conversion and physical layer process is sent to higher level equipment after the over-sampling data of base band data or base band.
Fig. 2 is a structured flowchart of the present invention.As shown in Figure 2, with what receive in the physical interface 11 of higher level equipment directly is the descending digital intermediate frequency data of handling through Digital Up Convert, descending digital intermediate frequency data are carried out digital-to-analogue conversion and are become analog if signal through delivering to AD/DA change-over circuit 12 after the format conversion of physical interface 11, descending analog if signal carries out filtering through radio circuit 13 and amplifies processing such as up-conversion, delivers to antenna opening at last to launch; The processing such as amplification filtering down-conversion by radio circuit 13 after antenna receives of up radiofrequency signal become analog if signal, 12 samplings become digital medium-frequency signal to up analog if signal through the AD/DA change-over circuit, and up digital medium-frequency signal carries out format conversion through physical interface 11 and physical layer process is sent to higher level equipment.
In addition, the present invention also comprises clock circuit 14, power circuit 15 and other complementary circuit, and they just can realize by routine techniques.
Claims (2)
1. a radio frequency remote equipment comprises: with physical interface, modulus/D/A converting circuit, the rf processing circuitry of higher level equipment;
Receive descending digital medium-frequency signal with the physical interface of higher level equipment, carry out delivering to modulus/D/A converting circuit after the format conversion and be converted to analog if signal, descending analog if signal carries out launching by antenna after upconversion process is amplified in filtering through rf processing circuitry; Up radiofrequency signal is carried out the amplification filtering down-converted by rf processing circuitry and is become analog if signal after antenna receives, up analog if signal is through modulus/D/A converting circuit sampling becoming digital medium-frequency signal, and up digital medium-frequency signal carries out format conversion through the physical interface with higher level equipment and physical layer process is sent to higher level equipment.
2. radio frequency remote equipment as claimed in claim 1 is characterized in that, also comprises power circuit and clock circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100010709A CN101232651A (en) | 2007-01-23 | 2007-01-23 | Radio frequency zoom out equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100010709A CN101232651A (en) | 2007-01-23 | 2007-01-23 | Radio frequency zoom out equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101232651A true CN101232651A (en) | 2008-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100010709A Pending CN101232651A (en) | 2007-01-23 | 2007-01-23 | Radio frequency zoom out equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101232651A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101335561B (en) * | 2008-08-01 | 2012-03-21 | 京信通信系统（中国）有限公司 | Long-drawing data interchanging equipment and data interchanging method thereof |
| CN106664325A (en) * | 2014-07-28 | 2017-05-10 | 英特尔Ip公司 | Apparatus, system and method of transferring control of a remote radio head between base-band unit (BBU) processing pools |
| WO2020156430A1 (en) * | 2019-02-02 | 2020-08-06 | 华为技术有限公司 | Information transmission method and communication device |
-
2007
- 2007-01-23 CN CNA2007100010709A patent/CN101232651A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101335561B (en) * | 2008-08-01 | 2012-03-21 | 京信通信系统（中国）有限公司 | Long-drawing data interchanging equipment and data interchanging method thereof |
| CN106664325A (en) * | 2014-07-28 | 2017-05-10 | 英特尔Ip公司 | Apparatus, system and method of transferring control of a remote radio head between base-band unit (BBU) processing pools |
| WO2020156430A1 (en) * | 2019-02-02 | 2020-08-06 | 华为技术有限公司 | Information transmission method and communication device |
| US11909461B2 (en) | 2019-02-02 | 2024-02-20 | Huawei Technologies Co., Ltd. | Information transmission method and communication apparatus |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080730 |