CN104378849A - Distributed base station - Google Patents
Distributed base station Download PDFInfo
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- CN104378849A CN104378849A CN201310358980.8A CN201310358980A CN104378849A CN 104378849 A CN104378849 A CN 104378849A CN 201310358980 A CN201310358980 A CN 201310358980A CN 104378849 A CN104378849 A CN 104378849A
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- China
- Prior art keywords
- module
- data
- base station
- remote radio
- rru
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0637—Properties of the code
- H04L1/065—Properties of the code by means of convolutional encoding
Abstract
The invention discloses a distributed base station which comprises a base-band processing unit and a remote radio unit. Uplink traffic channel port data between the base-band processing unit and the remote radio unit are frequency domain data after balance of a physical uplink shared channel (PUSCH). The uplink bandwidth of an Ir port can be effectively reduced.
Description
Technical field
The application relates to mobile communication technology field, particularly relates to a kind of distributed base station.
Background technology
In mobile communication system, the distributed base station of baseband processing unit (BBU)+Remote Radio Unit (RRU) has obtained large-scale application, and this networking mode also will be applied to LTE system, TD-SCDMA system etc.By Optical Fiber Transmission base band I/Q signal between BBU and RRU, the interface between BBU and RRU is called Ir interface, and the bandwidth of Ir interface depends on the transmission rate of baseband signal.
In prior art, the conventional dividing mode of BBU and RRU as shown in Figure 1, radio-frequency front-end process, the A/D of RRU primary responsibility antenna reception data change and intermediate frequency process, BBU is responsible for processing a large amount of baseband digital signal processing sections, comprises all Base-Band Processing functions of the bit-level such as symbol level and decoding such as FFT conversion, channel estimating, equilibrium.
The function of carrying out BBU and RRU in a conventional manner divides, RRU-BBU interface is by the time domain data under the multiple reception antenna base band sampling rate of transmission, up link RRU-BBU transmitted data amount is huge, and consumes resources is too much, and single RRU transmitted data amount is directly proportional to RRU antenna number, bandwidth.
For LTE system, under 20MHz bandwidth, when base station side antenna configuration is 8 antenna multiple-input and multiple-output (MIMO), Ir interface bandwidth is calculated as follows:
Uplink traffic transmission data volume=30.72MHz(sampling rate) × 16 (sampling precision) × 2(I/Q two-way) × 8(antenna number)=7864.32Mbps
Therefore, under 8 antenna LTEs configurations, generally need to adopt bandwidth to be the Optical Fiber Transmission Ir interface data of 10GHz bandwidth.
Because transfer of data at a high speed causes optical interface cost, increases considerably with the chip cost, transmission cost etc. of Interface Matching, seriously reduce the cost performance of equipment, therefore, the problem how reducing Ir interface bandwidth has become one of Important Problems of each operator and equipment manufacturers' concern.
Summary of the invention
This application provides distributed base station, effectively can reduce the upstream bandwidth of Ir interface.
The embodiment of the present application provides a kind of distributed base station, comprises baseband processing unit and Remote Radio Unit, and the reverse link traffic channel interface data between baseband processing unit and Remote Radio Unit is the frequency domain data after Physical Uplink Shared Channel PUSCH equilibrium.
Preferably, described Remote Radio Unit comprises: antenna data receiver module, front end processing block, A/D modular converter, intermediate frequency process module, single-carrier frequency division multiple access (SC-FDMA) demodulation process module, solution resource mapping processing module, channel estimation module and balance processing module;
Described baseband processing unit comprises inverse discrete Fourier transform IDFT and separates precoding module and decoding module.
As can be seen from the above technical solutions, by repartitioning reverse link traffic channel PUSCH function, RRU process is mentioned by most of symbol level process, interface data becomes the frequency domain data after balanced merging from original base band time domain data, thus effectively reduces the interface bandwidth of BBU-RRU.Select the frequency domain data after PUSCH equilibrium as the interface data of BBU and RRU, due to the data that PUSCH equilibrium is after multiple reception antenna merging treatment, have nothing to do with actual antennas number, therefore can greatly reduce interface data transmission amount, and the data volume of transmission is relevant to user scheduling bandwidth.
Accompanying drawing explanation
Fig. 1 is the conventional dividing mode schematic diagram of BBU and RRU in prior art;
Fig. 2 is BBU and the RRU dividing mode schematic diagram that the embodiment of the present application proposes.
Embodiment
RRU-BBU interface data is directly proportional to uplink receiving antenna number.The fundamental design idea of the application is: select the foundation that the module interface had nothing to do with antenna is repartitioned as BBU and RRU function as far as possible, to reach the object reducing RRU-BBU interface data bandwidth.For Traffic Channel, select the frequency domain data after Physical Uplink Shared Channel (PUSCH) equilibrium as the interface data of BBU and RRU, due to the data that PUSCH equilibrium is after multiple reception antenna merging treatment, have nothing to do with actual antennas number, therefore interface data transmission amount can greatly be reduced, and the data volume of transmission is relevant to user scheduling bandwidth, instead of processes all reception data.
Technical scheme is by repartitioning reverse link traffic channel PUSCH function, RRU process is mentioned by most of symbol level process, interface data becomes the frequency domain data after balanced merging from original base band time domain data, thus effectively reduces the interface bandwidth of BBU-RRU.
For making the know-why of technical scheme, feature and technique effect clearly, below in conjunction with specific embodiment, technical scheme is described in detail.
Fig. 2 is that RRU and the BBU functional module that the embodiment of the present application proposes divides schematic diagram, RRU be responsible for each antenna receive data radio-frequency front-end process, modulus (A/D) conversion, intermediate frequency process, single-carrier frequency division multiple access (SC-FDMA) demodulation process, separate resource mapping, channel estimating, equilibrium waits process, after BBU is responsible for balanced merging, the inverse discrete Fourier transform (IDFT) of data separates precoding, separates constellation mapping, the bit-level processing capacities such as decoding.
After being repartitioned by the reverse link traffic channel function of the application, BBU and RRU interface data becomes the frequency domain data after balanced merging, has nothing to do with uplink receiving antenna number, only relevant with the fluxion of transmission; Interface data has changed to frequency domain valid data by time domain in addition.After interface redefines, for LTE20MHz system, the maximum double fluid of uplink is example, then BBU and RRU interface bandwidth is as follows:
Reverse link traffic channel coffret data volume=1200(RB number) * 12(OFDM symbolic number) * 2(double fluid) * 32(IQ bit number)/1ms=921.6Mbps
Repartitioning of the reverse link traffic channel transfer function proposed by the application, the interface data of BBU with RRU relevantly with reception antenna becomes with to transmit fluxion relevant by original, become frequency domain valid data by time domain sampled data, interface bandwidth data volume is effectively reduced.
The foregoing is only the preferred embodiment of the application; not in order to limit the protection range of the application; within all spirit in technical scheme and principle, any amendment made, equivalent replacements, improvement etc., all should be included within scope that the application protects.
Claims (2)
1. a distributed base station, comprises baseband processing unit and Remote Radio Unit, it is characterized in that, the reverse link traffic channel interface data between baseband processing unit and Remote Radio Unit is the frequency domain data after Physical Uplink Shared Channel equilibrium.
2. distributed base station according to claim 1, it is characterized in that, described Remote Radio Unit comprises: antenna data receiver module, front end processing block, A/D modular converter, intermediate frequency process module, single-carrier frequency division multiple access demodulation process module, solution resource mapping processing module, channel estimation module and balance processing module;
Described baseband processing unit comprises inverse discrete Fourier transform solution precoding module and decoding module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310358980.8A CN104378849A (en) | 2013-08-16 | 2013-08-16 | Distributed base station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310358980.8A CN104378849A (en) | 2013-08-16 | 2013-08-16 | Distributed base station |
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| CN104378849A true CN104378849A (en) | 2015-02-25 |
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| CN201310358980.8A Pending CN104378849A (en) | 2013-08-16 | 2013-08-16 | Distributed base station |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017005142A1 (en) * | 2015-07-03 | 2017-01-12 | Huawei Technologies Co., Ltd. | Method and system for partitioning signal processing chains in a communication network |
| CN106506411A (en) * | 2015-09-07 | 2017-03-15 | 普天信息技术有限公司 | Uplink data transmission method and base station |
| CN106656294A (en) * | 2016-12-26 | 2017-05-10 | 京信通信技术(广州)有限公司 | Signal processing method and large-scale array antenna system |
| CN106936480A (en) * | 2015-12-28 | 2017-07-07 | 电信科学技术研究院 | A kind of signal processing method and device |
| EP3247052A1 (en) * | 2016-05-19 | 2017-11-22 | Hon Hai Precision Industry Co., Ltd. | Method and apparatus for data reduction in a communication system between remote radio heads and baseband units |
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| CN102291855A (en) * | 2010-06-18 | 2011-12-21 | 普天信息技术研究院有限公司 | Method for reducing infrared ray (Ir) interface bandwidth and distributive base station |
| CN102546504A (en) * | 2010-12-21 | 2012-07-04 | 华为技术有限公司 | Frequency domain transmission method and device |
| CN102904842A (en) * | 2011-07-29 | 2013-01-30 | 中兴通讯股份有限公司 | Method and system for joint processing of super cell upstream data |
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2013
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Patent Citations (4)
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| CN101753181A (en) * | 2008-12-12 | 2010-06-23 | 大唐移动通信设备有限公司 | Data transmission method, system and device |
| CN102291855A (en) * | 2010-06-18 | 2011-12-21 | 普天信息技术研究院有限公司 | Method for reducing infrared ray (Ir) interface bandwidth and distributive base station |
| CN102546504A (en) * | 2010-12-21 | 2012-07-04 | 华为技术有限公司 | Frequency domain transmission method and device |
| CN102904842A (en) * | 2011-07-29 | 2013-01-30 | 中兴通讯股份有限公司 | Method and system for joint processing of super cell upstream data |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017005142A1 (en) * | 2015-07-03 | 2017-01-12 | Huawei Technologies Co., Ltd. | Method and system for partitioning signal processing chains in a communication network |
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| CN107615875B (en) * | 2015-07-03 | 2020-03-10 | 华为技术有限公司 | Method and system for splitting a signal processing chain in a communication network |
| CN106506411A (en) * | 2015-09-07 | 2017-03-15 | 普天信息技术有限公司 | Uplink data transmission method and base station |
| CN106936480A (en) * | 2015-12-28 | 2017-07-07 | 电信科学技术研究院 | A kind of signal processing method and device |
| US10892785B2 (en) | 2015-12-28 | 2021-01-12 | China Academy Of Telecommunications Technology | Method for determining MIMO detection matrix of scheduled UE |
| EP3247052A1 (en) * | 2016-05-19 | 2017-11-22 | Hon Hai Precision Industry Co., Ltd. | Method and apparatus for data reduction in a communication system between remote radio heads and baseband units |
| CN106656294A (en) * | 2016-12-26 | 2017-05-10 | 京信通信技术(广州)有限公司 | Signal processing method and large-scale array antenna system |
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Application publication date: 20150225 |