CN101938782A - Common public radio interface standard-based CDMA2000 data encapsulation method - Google Patents
Common public radio interface standard-based CDMA2000 data encapsulation method Download PDFInfo
- Publication number
- CN101938782A CN101938782A CN2010102784778A CN201010278477A CN101938782A CN 101938782 A CN101938782 A CN 101938782A CN 2010102784778 A CN2010102784778 A CN 2010102784778A CN 201010278477 A CN201010278477 A CN 201010278477A CN 101938782 A CN101938782 A CN 101938782A
- Authority
- CN
- China
- Prior art keywords
- radio interface
- common public
- public radio
- cdma2000
- gain factor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a common public radio interface standard-based CDMA2000 data encapsulation method. The method comprises baseband data encapsulation, gain factor encapsulation and a frame encapsulation method which is specified by the common public radio interface standard. Through the technical scheme provided by the invention, a baseband data flow between the baseband and radio frequency of a CDMA2000 system can realize effective encapsulation and stable transmission on the WCDMA standard-based common public radio interface standard; and compared with the conventional method, the method has high periodicity and lays a foundation for the baseband to efficiently process data.
Description
Technical field
The present invention relates to the method for packing of base band and rf data in a kind of CDMA2000 (digital cdma wireless technology system) distributed base station system, in particular for the common public radio interface standard-application process of CPRI agreement in the CDMA2000 system, specifically a kind of CDMA2000 data encapsulation method based on the common public radio interface standard.
Background technology
Common public radio interface (Common Public Radio Interface, CPRI) be by comprising that Ericsson, Huawei, NEC, Nortel Networks and Siemens 5 large groups make a concerted effort to formulate, its objective is and formulate internal wireless Equipment Control center, wireless base station (Radio Equipment Control, REC) and wireless device (Radio Equipment, RE) between the standard agreement of interface.Open common public radio interface standard is that third generation wireless base station product and second generation wireless digital repeater station are increasing benefit, improves the flexibility aspect and provides convenience.
Common public radio interface has defined physical layer and link layer two layer protocols, can realize digital baseband signal transmission time division multiplexing.Physical layer is supported optical fiber and copper cable, and the line bit rate scope is that 614.4Mb/s is to 6.144Gb/s.Link layer has defined a synchronous frame structure, comprises basic frame and superframe, and the frame frequency of each basic frame is 3.84MHz, comprises 16 words (word).Superframe then is to be made of 256 basic frames.Defined quick control management channels (Ethernet) and control and management passage (High-Level Data Link Control) at a slow speed simultaneously, be used to transmit the data of control class and administrative class, can finish the maintenance of base band radio frequency part.
The common public radio interface standard is the interface standard between present most widely used base band and the radio frequency, in these standard criterion 2.0 versions, this standard is based on universal mobile telecommunications system (Universal Mobile Telecommunications System, UMTS) be described, and in 3.0 versions, this standard has been added global microwave access intercommunication technological system (World Interoperability for Microwave Access, application WiMax).And for the application of common public radio interface standard at digital cdma wireless technology system (Code Divison Multiple Access, abbreviation " CDMA "), up to the present this tissue is not realized.
In U.S. Pat 7,602, mention among the 751B2 " METHOD AND APPARATUS FOR TRANSPORTING CDMA TRAFFIC OVER A UMTS-COMPATIBLE CPRI INTERFACE " a kind of on common public radio interface the method for transmission of CDMA data flow, promptly on common public radio interface, transmit for the data of CDMA at a slow speed of adjusting 1.2288Msps, propose the idea of 8 CDMA chips of 25 basic frame carryings of common public radio interface, specific implementation as shown in Figure 2.
Though encapsulation has solved the rate-matched problem of 3.84/1.2288 shown in the accompanying drawing 2, has brought other complicated application problems.At first, the difference that the antenna carrier data of putting on each basic frame fixed position are not quite similar and can cause the rear end baseband interface to handle causes the versatility of application to reduce.Secondly, a plurality of antenna carrier gain factor encapsulation will be rethought, cause the complexity of application to improve.
Summary of the invention
The objective of the invention is the problem in digital cdma wireless technology system, used at the common public radio interface standard, a kind of CDMA2000 data encapsulation method based on the common public radio interface standard is proposed, this method possesses good versatility, lower complexity possesses the real-time and the reliability of common public radio interface standard simultaneously.。
Technical scheme of the present invention is:
A kind of CDMA2000 data encapsulation method based on the common public radio interface standard, it comprises base band data encapsulation and gain factor encapsulation;
Base band data encapsulation:, determine to encapsulate in the basic frame in 25 common public radio interface standards the chip of 8 CDMA2000 systems according to the chip period proportionate relationship of the basic frame period in the common public radio interface standard and CDMA2000 system 8: 25; The chip of described 8 CDMA2000 systems is concentrated preceding 8 the basic frame units that are encapsulated in 25 basic frames of common public radio interface standard;
The gain factor encapsulation: gain factor data bit dispersed and distributed is in the chip of CDMA2000 system, occupy the base band data lowest order, set corresponding 24 gain factors of per 256/512/1024/2048 CDMA2000 antenna carrier sampling, this gain factor is contained in preceding 12 antenna carrier sampling, during sampling:
For the over-sampling coefficient is 1, and promptly this gain factor is in preceding 12 antenna carrier;
For the over-sampling coefficient is 2, and promptly this gain factor is in preceding 6 antenna carrier;
For the over-sampling coefficient is 4, and promptly this gain factor is in preceding 3 antenna carrier.
In the base band data encapsulation of the present invention, divide two parts in 25 basic frames, preceding 8 basic frames are valid data, and back 17 basic frames are empty.
The position of gain factor encapsulation of the present invention is that 6400 basic frames are to repeat in the cycle with 25 superframes.
When gain factor of the present invention encapsulated, last bit information of continuous 24 groups of data abandoned, and inserts 24 bit informations of gain factor respectively, and all the other last bits of respectively organizing data all normally carry raw information.
Be equipped with a plurality of antenna carrier in each chip of the present invention, be set in preceding 8 chips of per 25 chips and be packaged with antenna carrier, back 17 chips are empty.
Beneficial effect of the present invention:
Method of the present invention compared with prior art has stronger practicality and versatility, makes things convenient for Base-Band Processing.At first, divide two parts in 25 basic frames, preceding 8 basic frames are valid data, 17 the basic frames in back are empty, compare with the comparatively complicated mode that distributes of 25 basic frame data in the United States Patent (USP) of mentioning in the background technology, regular and periodicity all greatly improves, and the high efficiency of handling for Back end data improves the basis; Though this packaged type need encapsulate after receiving 8 CDMA2000 chips again, this time-delay can be revised at the later stage algorithm.Secondly, gain factor is encapsulated in the common public radio interface standard with data mode, and Back end data need not the gain factor individual processing, only need extract when needed to get final product, and greatly reduces the complexity that Back end data is handled; And for the reasonable package gain factor, last bit information of continuous 24 groups of data abandons, insert 24 bit informations of gain factor respectively, all the other last bits of respectively organizing data normally carry raw information, can bring the performance loss of 24/ (8*2*256)=0.0058 at most, the snr loss is 0.035dB, is a very little value, almost can ignore.
The method of common public radio interface standard carrying CDMA2000 data of the present invention, this method for packing comprises base band data and gain factor method for packing, and the framing method for packing of pressing the common public radio interface standard code.By technical scheme provided by the invention, the base band of CDMA2000 system and the base-band data stream between the radio frequency can effectively encapsulate stable transfer on based on the common public radio interface standard of WCDMA standard, method possesses good periodicity relatively, and lays the first stone for the efficient deal with data of base band.
Description of drawings
Fig. 1 is the frame structure block diagram of common public radio interface standard, wherein: W is the font size in the basic frame, Y is the byte number in the word, and X is basic frame number, and 1 basic frame length is 260.42ns, Z is a Hyper Frame Number, 1 superframe comprises 256 basic frames, and frame length is 6637 μ s, and BFN is a CPRI 10ms frame, 1 BFN comprises 150 superframes, and frame length is 10ms;
Fig. 2 is a U.S. Pat 7,602, the encapsulation block diagram of CDMA data in the common public radio interface standard that 751B2 proposes;
Fig. 3 is the encapsulation block diagram of CDMA2000 base band data in the common public radio interface standard that the present invention proposes;
Fig. 4 is the position view of gain factor in the CDMA2000 base band data that the present invention proposes;
Fig. 5 is the position view of gain factor in the common public radio interface standard that the present invention proposes.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
Shown in Fig. 3-5, a kind of CDMA2000 data encapsulation method based on the common public radio interface standard is characterized in that it comprises base band data encapsulation and gain factor encapsulation;
Base band data encapsulation:, determine to encapsulate in the basic frame in 25 common public radio interface standards the chip of 8 CDMA2000 systems according to the chip period proportionate relationship of the basic frame period in the common public radio interface standard and CDMA2000 system 8: 25; The chip of described 8 CDMA2000 systems is concentrated preceding 8 the basic frame units that are encapsulated in 25 basic frames of common public radio interface standard;
The gain factor encapsulation: gain factor data bit dispersed and distributed is in the chip of CDMA2000 system, occupy the base band data lowest order, set corresponding 24 gain factors of per 256/512/1024/2048 CDMA2000 antenna carrier sampling, this gain factor is contained in preceding 12 antenna carrier sampling, be equipped with a plurality of antenna carrier in each chip, be set in preceding 8 chips of per 25 chips and be packaged with antenna carrier, back 17 chips are empty.During sampling:
For the over-sampling coefficient is 1, and promptly this gain factor is in preceding 12 antenna carrier;
For the over-sampling coefficient is 2, and promptly this gain factor is in preceding 6 antenna carrier;
For the over-sampling coefficient is 4, and promptly this gain factor is in preceding 3 antenna carrier.
In the base band data encapsulation of the present invention, divide two parts in 25 basic frames, preceding 8 basic frames are valid data, and back 17 basic frames are empty.
The position of gain factor encapsulation of the present invention is that 6400 basic frames are to repeat in the cycle with 25 superframes.
When gain factor of the present invention encapsulated, last bit information of continuous 24 groups of data abandoned, and inserts 24 bit informations of gain factor respectively, and all the other last bits of respectively organizing data all normally carry raw information.
During concrete enforcement:
Common public radio interface standard link encapsulation CDMA2000 data method of the present invention as shown in Figure 3, it encapsulates 8 CDMA2000 chips in 25 basic frames of common public radio interface standard, with 6 antenna carrier, over-sampling is 2, and the gain factor statistical window is that 256 chips are example:
Over-sampling is 1 o'clock, and each antenna carrier hits is 1 in the CDMA2000 chip; Over-sampling is 2 o'clock, and each antenna carrier hits is 2 in the CDMA2000 chip; Over-sampling is 4 o'clock, and each antenna carrier hits is 4 in the CDMA2000 chip.Have only this four kinds of over-samplings possibilities, wherein, downlink data only may be 1 or 2, and upstream data only may be 2 or 4, and we are upstream data here, and over-sampling is taken as 2.From base station frame (BFN) head of common public radio interface standard, per 25 basic frames repeat once.In these 25 basic frames, preceding 8 basic frame data character segments are used for carrying the antenna carrier data, and the data arrangement rule is identical in these 8 basic frames, back 17 basic frame data character segments empty promptly complete zero; 25 partly identical common public radio interface standards of basic frame control words are not done change.
The position of data bit in the common public radio interface standard superframe of band gain factor begins note from the base station frame (BFN) of common public radio interface standard head as shown in Figure 4, and per 25 superframe superframes repeat once.
Wherein, the gain factor of corresponding 1 24 bits of 256 CDMA2000 chips is 2 base band data for over-sampling, need give up preceding 6 chips of these 256 chips, also be the real part of 12 sampled datas and each that the imaginary part lowest order inserts gain factor, as shown in Figure 5.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (5)
1. the CDMA2000 data encapsulation method based on the common public radio interface standard is characterized in that it comprises base band data encapsulation and gain factor encapsulation;
Base band data encapsulation:, determine to encapsulate in the basic frame in 25 common public radio interface standards the chip of 8 CDMA2000 systems according to the chip period proportionate relationship of the basic frame period in the common public radio interface standard and CDMA2000 system 8: 25; The chip of described 8 CDMA2000 systems is concentrated preceding 8 the basic frame units that are encapsulated in 25 basic frames of common public radio interface standard;
The gain factor encapsulation: gain factor data bit dispersed and distributed is in the chip of CDMA2000 system, occupy the base band data lowest order, set corresponding 24 gain factors of per 256/512/1024/2048 CDMA2000 antenna carrier sampling, this gain factor is contained in preceding 12 antenna carrier sampling, during sampling:
For the over-sampling coefficient is 1, and promptly this gain factor is in preceding 12 antenna carrier;
For the over-sampling coefficient is 2, and promptly this gain factor is in preceding 6 antenna carrier;
For the over-sampling coefficient is 4, and promptly this gain factor is in preceding 3 antenna carrier.
2. the CDMA2000 data encapsulation method based on the common public radio interface standard according to claim 1 is characterized in that dividing two parts in 25 basic frames in the described base band data encapsulation, and preceding 8 basic frames are valid data, and back 17 basic frames are empty.
3. the CDMA2000 data encapsulation method based on the common public radio interface standard according to claim 1 is characterized in that the position of described gain factor encapsulation is that 6400 basic frames are to repeat in the cycle with 25 superframes.
4. the CDMA2000 data encapsulation method based on the common public radio interface standard according to claim 1, when it is characterized in that described gain factor encapsulates, last bit information of continuous 24 groups of data abandons, insert 24 bit informations of gain factor respectively, all the other last bits of respectively organizing data all normally carry raw information.
5. the CDMA2000 data encapsulation method based on the common public radio interface standard according to claim 1, it is characterized in that being equipped with a plurality of antenna carrier in described each chip, be set in preceding 8 chips of per 25 chips and be packaged with antenna carrier, back 17 chips are empty.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010278477 CN101938782B (en) | 2010-09-10 | 2010-09-10 | Common public radio interface standard-based CDMA2000 data encapsulation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010278477 CN101938782B (en) | 2010-09-10 | 2010-09-10 | Common public radio interface standard-based CDMA2000 data encapsulation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101938782A true CN101938782A (en) | 2011-01-05 |
| CN101938782B CN101938782B (en) | 2013-06-05 |
Family
ID=43391858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010278477 Active CN101938782B (en) | 2010-09-10 | 2010-09-10 | Common public radio interface standard-based CDMA2000 data encapsulation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101938782B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158461A (en) * | 2011-03-04 | 2011-08-17 | 华为技术有限公司 | Method and device for transmitting non-I (in-phase)/Q (quadrature phase) data through common public radio interface (CPRI) |
| WO2014110791A1 (en) * | 2013-01-18 | 2014-07-24 | 华为技术有限公司 | Data transmission method, device, and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005034544A1 (en) * | 2003-09-30 | 2005-04-14 | Telefonaktiebolaget Lm Ericsson (Publ) | Interface, apparatus, and method for communication between a radio equipment control node and a remote radio equipment node in a radio base station |
| US20070133477A1 (en) * | 2005-12-12 | 2007-06-14 | Ebert Roman S | Method and apparatus for transporting CDMA traffic over a UMTS-compatible CPRI interface |
| CN101394197A (en) * | 2008-09-28 | 2009-03-25 | 中兴通讯股份有限公司 | Baseband data transmission method and device for CDMA distributed base station system |
| CN101466172A (en) * | 2008-12-25 | 2009-06-24 | 中兴通讯股份有限公司 | Method and device for implementing compatibility of WCDMA system and GSM system |
-
2010
- 2010-09-10 CN CN 201010278477 patent/CN101938782B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005034544A1 (en) * | 2003-09-30 | 2005-04-14 | Telefonaktiebolaget Lm Ericsson (Publ) | Interface, apparatus, and method for communication between a radio equipment control node and a remote radio equipment node in a radio base station |
| US20070133477A1 (en) * | 2005-12-12 | 2007-06-14 | Ebert Roman S | Method and apparatus for transporting CDMA traffic over a UMTS-compatible CPRI interface |
| CN101394197A (en) * | 2008-09-28 | 2009-03-25 | 中兴通讯股份有限公司 | Baseband data transmission method and device for CDMA distributed base station system |
| CN101466172A (en) * | 2008-12-25 | 2009-06-24 | 中兴通讯股份有限公司 | Method and device for implementing compatibility of WCDMA system and GSM system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158461A (en) * | 2011-03-04 | 2011-08-17 | 华为技术有限公司 | Method and device for transmitting non-I (in-phase)/Q (quadrature phase) data through common public radio interface (CPRI) |
| CN102158461B (en) * | 2011-03-04 | 2014-01-08 | 华为技术有限公司 | Method and device for transmitting non-I (in-phase)/Q (quadrature phase) data through common public radio interface (CPRI) |
| WO2014110791A1 (en) * | 2013-01-18 | 2014-07-24 | 华为技术有限公司 | Data transmission method, device, and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101938782B (en) | 2013-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102118191B (en) | Method, equipment and system for transmitting common public radio interface data | |
| CN100484335C (en) | Encapsulation of independent transmissions over internal interface of distributed radio base station | |
| CN101860394B (en) | Multi-standard IQ data mapping method and apparatus based on CPRI | |
| CN100477864C (en) | Encapsulation of diverse protocols over internal interface of distributed radio base station | |
| CN101159751B (en) | Method and device of transmitting time division multiplex service through IP switch network | |
| CN1956564A (en) | Multi-protocol signal transmission method based on CPRI in distributed base station system and its device | |
| CN102843720B (en) | Method, device and system for compressing and uncompressing data in distributed base station system | |
| CN101282349B (en) | Method and system for promoting application of CPRI interface, processing module for CPRI interface | |
| CN106385390B (en) | Method and system for realizing ten-gigabit Ethernet power port transmission based on FPGA | |
| CN102316055A (en) | Base band unit, base band processing unit (BBU), remote radio unit (RRU) and base station | |
| CN101868054A (en) | Improved distribution-type base station architecture and realization method | |
| CN111212446B (en) | Data processing method, data processing device, computer equipment and storage medium | |
| CN101938285A (en) | Method and device for realizing RRU data interface by using ping-pong operation | |
| CN101466172A (en) | Method and device for implementing compatibility of WCDMA system and GSM system | |
| CN102740377B (en) | Method and equipment for forwarding data and base station | |
| CN101437321B (en) | Method for signaling cascade for radio frequency zooming unit | |
| CN101686185A (en) | Method, device and system for transmitting TDM services in packet network | |
| CN101938782B (en) | Common public radio interface standard-based CDMA2000 data encapsulation method | |
| CN105959980B (en) | A kind of wireless access system based on C-RAN | |
| CN104135294A (en) | E-waveband wireless transmission signal generating equipment | |
| CN105142155B (en) | Optical fiber distribution system and method | |
| CN106230509A (en) | A kind of method and system utilizing ten thousand mbit ethernet transmission wireless signals | |
| US20180139649A1 (en) | Data Frame Transmission Method and Apparatus for Virtual Elastic CPRI Interface | |
| CN201742566U (en) | Multipoint set net type data system | |
| CN101594590A (en) | Be used for the data transmission method of wireless base station and the wireless base station of this method of application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: Yuhuatai District of Nanjing City, Jiangsu province 210012 Bauhinia Road No. 68 Applicant after: Nanjing Sinovatio Technology LLC Address before: Yuhuatai District of Nanjing City, Jiangsu province 210012 Bauhinia Road No. 68 Applicant before: Nanjing Zhongxing Special Software Co., Ltd. |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: NANJING ZHONGXING SPECIAL SOFTWARE CO., LTD. TO: NANJING SINOVATIO TECHNOLOGY LLC |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 210012 Yuhuatai, Jiangsu province tulip Road, No. 17, No. Patentee after: Nanjing Sinovatio Technology LLC Address before: Yuhuatai District of Nanjing City, Jiangsu province 210012 Bauhinia Road No. 68 Patentee before: Nanjing Sinovatio Technology LLC |
|
| CP02 | Change in the address of a patent holder |
Address after: Room 1501, building 2, No.19, ningshuang Road, Yuhuatai District, Nanjing City, Jiangsu Province Patentee after: Nanjing Sinovatio Technology LLC Address before: 210012 tulip Road 17, Yuhuatai District, Jiangsu, Nanjing Patentee before: Nanjing Sinovatio Technology LLC |
|
| CP02 | Change in the address of a patent holder |