CN102821489A - Base station and data compression method on base station side - Google Patents
Base station and data compression method on base station side Download PDFInfo
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- CN102821489A CN102821489A CN2011101526006A CN201110152600A CN102821489A CN 102821489 A CN102821489 A CN 102821489A CN 2011101526006 A CN2011101526006 A CN 2011101526006A CN 201110152600 A CN201110152600 A CN 201110152600A CN 102821489 A CN102821489 A CN 102821489A
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Abstract
The invention relates to a base station and an uplink data compression method on a base station side. The base station comprises a RRU (radio remote unit) and a BBU (base band unit). The uplink data compression method on the base station side comprises the step of deleting CP (cyclic prefix) information of each OFDM (orthogonal frequency division multiplexing) symbol in uplink data by the RRU before the received uplink data are sent to the BBU. The uplink data compression method on the base station side reduces the data volume of the uplink data, so that speed of an optical interface is reduced, the speed increase of a communication system device is decreased, and the operation cost is lowered.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of base station and base station side data compression method.
Background technology
Data compression is meant under the prerequisite of drop-out not; The reduction data volume is to reduce memory space; Improve a kind of technical method of its transmission, storage and treatment effeciency, or data are reorganized, reduce the redundancy of data and the space of storage according to certain algorithm.Data compression comprises lossy compression method and lossless compress.Lossy compression method is to have utilized the mankind to the insensitive characteristic of some frequency content in image or the sound wave, allows the certain information of loss in the compression process; Though can not recover initial data fully, the part of being lost is less to the influence of understanding original image, has brought bigger compression ratio.Lossy compression method is widely used in voice, image and compression of video data.Lossless compress is to utilize the statistical redundancy of data to compress; Can recover initial data fully and not cause any distortion; But compression ratio receives the one theory of data statistics redundancy, is generally 2: 1 to 5: 1, and these class methods are widely used in text data; The compression of the view data of program and particular application (like fingerprint image, medical image etc.).
For any type of communication, have only when the transmit leg of information can both be understood encoding mechanism with the recipient packed data to communicate by letter and to work.Have only that he can understand packed data when the recipient knows coding method.Some compression algorithms have been utilized this characteristic; In compression process, data are encrypted; For example utilize password encryption, one can correctly obtain data just now with what guarantee only to obtain authorizing, data compression can realize it being because the data of most real worlds all have statistical redundancy.
If allow fidelity loss to a certain degree, can also realize further compression so.Some details and imperfection possibly can't be noticed when for example, people see picture or television image.Equally, two audio sound-recording sample sequences possibly sound the same, but in fact not just the same.The lossy compression method algorithm is bringing less figure place presentation video, video or the audio frequency of use under the situation of minute differences; Owing to can help to reduce consumption like the expensive resource of hard drive space with being connected bandwidth; So compress extremely important; Yet compression needs consumption information to handle resource, and this also possibly be an expensive.So the design demand of data compression scheme is traded off between compressed capability, the distortion factor, required computational resource and other the different factors that need consider.
Radio frequency in the distributed base station zooms out structure in the prior art; Wireless access network is by eNodeB (Evolved NodeB; The base station of evolution) constitutes; Wherein (Evolved Building Base band Unit is eBBU) with evolved Remote Radio Unit (Evolved Radio Remote Unit, eRRU) formation by evolved indoor baseband processing unit for eNodeB; Connect through optical fiber or cable between eBBU and the eRRU, adopt general common rf interface or open agreements such as wave point to carry out data interaction.
Along with the increase of the bandwidth or the antenna number of wireless communication system, light mouth speed will increase according to direct proportion, with the hardware cost that increases equipment greatly, and, along with the continuation of light mouth speed increases, will there be to satisfy the hardware device of corresponding light mouth speed.Therefore, be badly in need of a kind of data compression method at present, to reduce data rate.
Summary of the invention
The objective of the invention is to, a kind of base station and base station side data compression method are provided, to reduce light mouth speed.
The invention provides a kind of base station side upstream data compression method, said method comprises:
Remote Radio Unit (Radio Remote Unit; RRU) upstream data that receives is being sent to baseband processing unit (Building Base band Unit; BBU) preceding; With each OFDM in the above-mentioned upstream data (Orthogonal Frequency Division Multiplexing, OFDM) Cyclic Prefix of symbol (Cyclic Prefix, CP) information deletion.
Further, above-mentioned CP information comprises preposition CP information and rearmounted CP information.
The present invention also provides a kind of base station, comprises RRU and BBU, and above-mentioned RRU is used for deleting the CP information in each OFDM symbol of the upstream data that receives.
Further, be connected through optical fiber or cable between above-mentioned RRU and the above-mentioned BBU.
Further, adopt common rf interface protocol or open Radio interface protocols to carry out data interaction between above-mentioned RRU and the above-mentioned BBU.
The present invention compresses upstream data through the CP information of each OFDM symbol of deletion upstream data, has reduced the data volume of upstream data, thereby has reduced light mouth speed, has alleviated the speedup of communication system equipment, has reduced operation cost.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes a part of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, does not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the embodiment flow chart of base station side data compression method of the present invention;
Fig. 2 is the sketch map of an OFDM symbol on time domain;
Fig. 3 is the embodiment theory diagram of base station of the present invention.
Embodiment
In order to make technical problem to be solved by this invention, technical scheme and beneficial effect clearer, clear,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As shown in Figure 1, be the flow chart of base station side data compression method of the present invention, present embodiment may further comprise the steps:
Step S001:RRU receives upstream data;
Step S002: delete all the CP information in the above-mentioned upstream data;
CP information comprises preposition CP information and rearmounted CP information.
Step S003: above-mentioned upstream data is sent to BBU.
As shown in Figure 2, be the sketch map of an OFDM symbol on time domain, wherein, a is the preposition CP information of OFDM symbol, and b is the rearmounted CP information of OFDM symbol, and T representes the time that an OFDM symbol takies, T on time domain
CpThe time that the CP information of expression OFDM symbol takies on time domain; The sample frequency of upstream data is 30.72Mhz; The sampled point of OFDM symbol is 30.72 * T, uses existing method that upstream data is (30.72 * T) * 15 bits through the data volume that quantizes to produce with the coding back; Use compression method of the present invention, promptly RRU falls all CP information deletions of each OFDM symbol, because the time that the CP information of each OFDM symbol takies on time domain is T before BBU sends the upstream data receive
Cp, the time that takies of OFDM symbol on time domain of therefore deleting after the CP information is T-T
Cp, the sampled point of OFDM symbol is 30.72 * T, is 30.72 * (T-T through the data volume that quantizes to produce with the coding back
Cp) * 15 bit is compared with existing method, and the data volume that the present invention saves each OFDM symbol compression back is 30.72 * T
Cp* 15 bits.
As shown in Figure 2, be the theory diagram of base station of the present invention, comprise RRU 01 and BBU 02, wherein,
RRU 01, is used for deleting the CP information in each OFDM symbol of the upstream data that receives, and the upstream data that obtains is sent to BBU 02;
BBU 02, is used for the upstream data of receiving is carried out Base-Band Processing.
Be connected through optical fiber or cable between RRU 01 and the BBU 02, and adopt common rf interface protocol or open Radio interface protocols etc. to carry out data interaction.
Above-mentioned explanation illustrates and has described the preferred embodiments of the present invention; But as previously mentioned; Be to be understood that the present invention is not limited to the form that this paper discloses, should do not regard eliminating as, and can be used for various other combinations, modification and environment other embodiment; And can in invention contemplated scope described herein, change through the technology or the knowledge of above-mentioned instruction or association area.And change that those skilled in the art carried out and variation do not break away from the spirit and scope of the present invention, then all should be in the protection range of accompanying claims of the present invention.
Claims (5)
1. base station side upstream data compression method is characterized in that said method comprises:
Radio frequency remote unit RRU is before sending to baseband processing unit BBU with the upstream data that receives, with the cyclic prefix CP information deletion of each the orthogonal frequency division multiplex OFDM symbol in the said upstream data.
2. method according to claim 1 is characterized in that, said CP information comprises preposition CP information and rearmounted CP information.
3. a base station comprises RRU and BBU, it is characterized in that said RRU is used for deleting the CP information in each OFDM symbol of the upstream data that receives.
4. base station according to claim 3 is characterized in that, is connected through optical fiber or cable between said RRU and the said BBU.
5. according to claim 3 or 4 described base stations, it is characterized in that, adopt common rf interface protocol or open Radio interface protocols to carry out data interaction between said RRU and the said BBU.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101526006A CN102821489A (en) | 2011-06-08 | 2011-06-08 | Base station and data compression method on base station side |
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| CN2011101526006A CN102821489A (en) | 2011-06-08 | 2011-06-08 | Base station and data compression method on base station side |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944853A (en) * | 2014-04-24 | 2014-07-23 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Quasi-lossless compression method based on corrected OFDM sub-carriers |
| CN104768226A (en) * | 2014-01-02 | 2015-07-08 | 中国移动通信集团公司 | BBU pool data exchange device and baseband unit pool data exchange method |
| CN106612136A (en) * | 2015-10-20 | 2017-05-03 | 电信科学技术研究院 | Downlink data transmission method, device and system |
| CN107018107A (en) * | 2017-03-31 | 2017-08-04 | 信阳师范学院 | Guasi-lossless compression algorithm based on fractional-sample point auxiliary corrective subcarrier |
| WO2020125129A1 (en) * | 2018-12-20 | 2020-06-25 | 中兴通讯股份有限公司 | Data processing method, bbu, rru and computer readable storage medium |
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| WO2009067859A1 (en) * | 2007-10-30 | 2009-06-04 | Datang Mobile Communications Equipment Co., Ltd | A method and apparatus for configuring data channel |
| CN101932002A (en) * | 2009-06-19 | 2010-12-29 | 中兴通讯股份有限公司 | Method for realizing matching between uplink transmission rate and downlink transmission rate as well as BBU and RRU |
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Patent Citations (3)
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| CN1554189A (en) * | 2001-09-12 | 2004-12-08 | ���ǵ�����ʽ���� | Method and apparatus for transferring channel information in OFDM communications |
| WO2009067859A1 (en) * | 2007-10-30 | 2009-06-04 | Datang Mobile Communications Equipment Co., Ltd | A method and apparatus for configuring data channel |
| CN101932002A (en) * | 2009-06-19 | 2010-12-29 | 中兴通讯股份有限公司 | Method for realizing matching between uplink transmission rate and downlink transmission rate as well as BBU and RRU |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104768226A (en) * | 2014-01-02 | 2015-07-08 | 中国移动通信集团公司 | BBU pool data exchange device and baseband unit pool data exchange method |
| CN104768226B (en) * | 2014-01-02 | 2018-09-04 | 中国移动通信集团公司 | A kind of baseband pool DEU data exchange unit and method |
| CN103944853A (en) * | 2014-04-24 | 2014-07-23 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Quasi-lossless compression method based on corrected OFDM sub-carriers |
| CN106612136A (en) * | 2015-10-20 | 2017-05-03 | 电信科学技术研究院 | Downlink data transmission method, device and system |
| CN107018107A (en) * | 2017-03-31 | 2017-08-04 | 信阳师范学院 | Guasi-lossless compression algorithm based on fractional-sample point auxiliary corrective subcarrier |
| WO2020125129A1 (en) * | 2018-12-20 | 2020-06-25 | 中兴通讯股份有限公司 | Data processing method, bbu, rru and computer readable storage medium |
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