CN104378848B - A kind of distributed base station - Google Patents
A kind of distributed base station Download PDFInfo
- Publication number
- CN104378848B CN104378848B CN201310358825.6A CN201310358825A CN104378848B CN 104378848 B CN104378848 B CN 104378848B CN 201310358825 A CN201310358825 A CN 201310358825A CN 104378848 B CN104378848 B CN 104378848B
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- Prior art keywords
- module
- uplink control
- remote radio
- radio unit
- processing
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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
-
- 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
This application discloses a kind of distributed base stations, including baseband processing unit and Remote Radio Unit, the uplink control signal of the Ir interfaces transmission between the baseband processing unit and Remote Radio Unit is made of the measurement of correlation amount and ascending control information of Physical Uplink Control Channel PUCCH.By applying application scheme, it can greatly reduce the data volume of the uplink control signal of Ir interfaces transmission.
Description
Technical field
This application involves mobile communication technology field more particularly to a kind of distributed base stations.
Background technology
In mobile communication system, baseband processing unit（BBU）+ Remote Radio Unit（RRU）Distributed base station
Large-scale application is obtained, which will also be applied to LTE system, TD-SCDMA system etc..Lead between BBU and RRU
Optical fiber transmission base band I/Q signal is crossed, the interface between BBU and RRU is known as Ir interfaces, and the bandwidth of Ir interfaces depends on baseband signal
Transmission rate.
In the prior art BBU and RRU function module as shown in Figure 1,
Based on the division of BBU in the prior art and RRU, RRU is mainly responsible for uplink control signal antenna and receives penetrating for data
Frequency front-end processing, A/D conversions and IF process, BBU are responsible for handling a large amount of baseband digital signal process part, including
All Base-Band Processings such as the symbol level of PUCCH and bit-level Base-Band Processing, including FFT transform, channel estimation, equilibrium and decoding
Function.According to the prior art, the interface data of uplink control signal is the time domain number under multiple reception antenna base band sampling rates
According to interface transmission data amount is huge.
With single RRU, each RRU supports 8 antenna rf units, the system that each radio frequency unit supports 20MHz bandwidth
For, it is per the RRU-BBU bit data amounts TransBitNum transmitted between sub-frame of uplink RRU and BBU：
The ratio that the sampling number of TransBitNum=RRU numbers × number of antennas × mono- subframe × each sampled point occupies
Special bit wide
=1 × 8 × 30720 × 32
=7864320bit
Interface data amount=8（Antenna number）*30.72M（Base band sampling rate）*32（IQ bit numbers）=7864.32Mbps
RRU-BBU transmission data bandwidth requirements needed for i.e. single RRU are 7.86Gbps, and resource cost is huge.
And as LTE based on the prior art under the growing trend of the demands such as high bandwidth, multiple antennas MIMO, being designed
The data volume that will transmit of Ir interfaces will also be multiplied.In the following networking and C-RAN technologies, LTE and later technology
Introduce the technologies such as bandwidth and the MIMO of 20MHz or more so that the digitized radio frequency digital stream on single site be up to 50Gbps with
On, occupancy fiber resource is huge, and the interface bandwidth between BBU-RRU proposes huge challenge.
The interface data transmission of high-speed causes interface cost, transmission cost etc. to increase considerably, and how to reduce Ir interfaces
The problem of bandwidth, has become one of the Important Problems of future device realization and networking.
Invention content
This application provides a kind of distributed base stations, can reduce the uplink control signal transmission bandwidth of Ir interfaces.
A kind of distributed base station provided by the embodiments of the present application, including baseband processing unit and Remote Radio Unit, it is described
The uplink control signal of Ir interfaces transmission between baseband processing unit and Remote Radio Unit is by Physical Uplink Control Channel
The measurement of correlation amount and ascending control information of PUCCH is constituted.
Preferably, the Remote Radio Unit includes：Antenna data receiving module, front end processing block, analog-to-digital conversion mould
Block, IF process module, single carrier frequency division multiplexing SC-FDMA demodulation process module, solution resource impact processing module, channel estimation
Module, balance processing module, despreading processing module, solution constellation mapping block, descrambling module and decoding module.
Preferably, the measurement of correlation amount and ascending control information of the PUCCH include：Discontinuous transmission/certainty confirmation/
Negative acknowledgement DTX/ACK/NACK, channel quality instruction/pre-coding matrix instruction CQI/PMI, order RI, Signal to Interference plus Noise Ratio SINR with
And Timing Advance.
As can be seen from the above technical solutions, it by repartitioning the function of RRU and BBU, BBU will realize in the prior art
SC-FDMA demodulation process, solve resource impact, channel estimation, equilibrium merge, despreading processing, solve constellation mapping, descramble, decoding
Etc. functions move to RRU realization, BBU be substantially carried out using decoding and measurement result processing, to greatly reduce Ir interfaces transmission
The data volume of uplink control signal.
Description of the drawings
Fig. 1 is the functional block diagram of the RRU and BBU of distributed base station in the prior art；
Fig. 2 is the functional block diagram of the RRU and BBU for the distributed base station that the embodiment of the present application proposes.
Specific implementation mode
To keep the technical principle, feature and technique effect of technical scheme clearer, below in conjunction with specific reality
Example is applied technical scheme is described in detail.
The application carries out function division to BBU and RRU again, in order to effectively reduce uplink control signal coffret band
Width, the present invention functionally mention RRU processing by most of, to achieve the purpose that reduce RRU-BBU interface data amounts.It is right
For PUCCH, only measurement of correlation amount and ascending control information（UCI）Etc. information be transmitted as interface data, including
Discontinuous transmission/certainty confirmation/negative acknowledgement（DTX/ACK/NACK）, channel quality instruction/pre-coding matrix instruction
（CQI/PMI）, order（RI）, Signal to Interference plus Noise Ratio（SINR）And the information such as Timing Advance.It is as shown in Figure 2 to repartition mode.
After the function of repartitioning BBU and RRU, Remote Radio Unit includes：Antenna data receiving module, front-end processing mould
Block, analog-to-digital conversion（A/D）Module, IF process module, single carrier frequency division multiplexing（SC-FDMA）Demodulation process module, solution resource
Map processing module, channel estimation module, balance processing module, despreading processing module, solution constellation mapping block, descrambling module and
Decoding module.That is, the SC-FDMA demodulation process that BBU in the prior art is realized, solution resource impact, channel estimation,
Weighing apparatus merges, despreading processing, solves constellation mapping, descrambling, and the functions such as decoding move to RRU realizations, and BBU is substantially carried out using decoding and surveys
Measure result treatment.
According to application scheme, in the case of single RRU, the uplink control signal of Ir interfaces transmission controls for physical uplink
Channel（PUCCH）Handling result, including channel state information（CSI）With downlink HARQ feedback information two parts, wherein PUCCH
The composition of CSI part of interface (the CQI/PMI/RI testing results of PUCCH carryings) is as shown in table 1：
Table 1
PUCCH HARQ feedback informations interface (the SR/ACK infomation detections result of PUCCH carryings) composition is as shown in table 2:
Table 2
It is obtained by above table：For the situation of single RRU, PUCCH transmitted data amounts are：
3280 (CSI interface bit numbers)+1680 (HARQ interface bit numbers)=4960bits；
BBU is repartitioned with after RRU functions, IR interfaces transmit the only former transmitted data amount of data volume of uplink control signal
0.063%, IR interface bandwidths be significantly reduced.
The foregoing is merely the preferred embodiments of the application, not to limit the protection domain of the application, it is all
Within the spirit and principle of technical scheme, any modification, equivalent substitution, improvement and etc. done should be included in this Shen
Within the scope of please protecting.
Claims (2)
1. a kind of distributed base station, including baseband processing unit and Remote Radio Unit, which is characterized in that the Base-Band Processing list
Member and Remote Radio Unit between Ir interfaces transmission uplink control signal by Physical Uplink Control Channel PUCCH correlative measurement
Amount amount and ascending control information are constituted；
Wherein, by the single carrier frequency division multiplexing SC-FDMA demodulation process module in the baseband processing unit, Xie Ziyuanyingshechu
Manage module, channel estimation module, balance processing module, despreading processing module, solution constellation mapping block, descrambling module and decoding mould
The function that block is realized, moves on in the Remote Radio Unit and realizes；
The Remote Radio Unit includes：Antenna data receiving module, front end processing block, analog-to-digital conversion module, IF process
Module, single carrier frequency division multiplexing SC-FDMA demodulation process module, solution resource impact processing module, channel estimation module, at equilibrium
Manage module, despreading processing module, solution constellation mapping block, descrambling module and decoding module.
2. distributed base station according to claim 1, which is characterized in that the measurement of correlation amount of the PUCCH and uplink control
Information processed includes：Discontinuous transmission/certainty confirmation/negative acknowledgement DTX/ACK/NACK, channel quality instruction/precoding square
Battle array instruction CQI/PMI, order RI, Signal to Interference plus Noise Ratio SINR and Timing Advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310358825.6A CN104378848B (en) | 2013-08-16 | 2013-08-16 | A kind of distributed base station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310358825.6A CN104378848B (en) | 2013-08-16 | 2013-08-16 | A kind of distributed base station |
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| Publication Number | Publication Date |
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| CN104378848A CN104378848A (en) | 2015-02-25 |
| CN104378848B true CN104378848B (en) | 2018-08-10 |
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| CN201310358825.6A Expired - Fee Related CN104378848B (en) | 2013-08-16 | 2013-08-16 | A kind of distributed base station |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105611656A (en) * | 2015-09-25 | 2016-05-25 | 巫立斌 | Distributed base station based on Internet of things |
| CN106604310A (en) * | 2015-10-14 | 2017-04-26 | 普天信息技术有限公司 | Random access method, system, base station processing unit and remote radio module |
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2124472A1 (en) * | 2007-03-01 | 2009-11-25 | NTT DoCoMo, Inc. | Base station device and communication control method |
| CN101754475A (en) * | 2008-12-17 | 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 |
| CN102299735A (en) * | 2010-06-25 | 2011-12-28 | 普天信息技术研究院有限公司 | Method for decreasing bandwidth of Ir interface and distributed base station |
| CN102647804A (en) * | 2011-02-21 | 2012-08-22 | 中国移动通信集团公司 | Distributed base station as well as data transmission method and device |
-
2013
- 2013-08-16 CN CN201310358825.6A patent/CN104378848B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2124472A1 (en) * | 2007-03-01 | 2009-11-25 | NTT DoCoMo, Inc. | Base station device and communication control method |
| CN101754475A (en) * | 2008-12-17 | 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 |
| CN102299735A (en) * | 2010-06-25 | 2011-12-28 | 普天信息技术研究院有限公司 | Method for decreasing bandwidth of Ir interface and distributed base station |
| CN102647804A (en) * | 2011-02-21 | 2012-08-22 | 中国移动通信集团公司 | Distributed base station as well as data transmission method and device |
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| CN104378848A (en) | 2015-02-25 |
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