CN101325737A - Method for adapting IQ data and CPRI interface of GSM/EDGE - Google Patents
Method for adapting IQ data and CPRI interface of GSM/EDGE Download PDFInfo
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- CN101325737A CN101325737A CNA2007101127635A CN200710112763A CN101325737A CN 101325737 A CN101325737 A CN 101325737A CN A2007101127635 A CNA2007101127635 A CN A2007101127635A CN 200710112763 A CN200710112763 A CN 200710112763A CN 101325737 A CN101325737 A CN 101325737A
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Abstract
The invention discloses a method of adopting IQ data of GSM/EDGE and CPRI interface, comprising: mapping an IQ data of a shock burst of GSM/EDGE to a group of basic frames of CPRI, such group of basic frames of CPRI called as section; 13 sections are a period, 8 periods are a mapping period having 60 ms duration as mapping frame; the mapping frame comprises 6 wireless frames; sending or receiving the generates plural mapping frames by CPRI interface. The invention further discloses a frame structure of adopting IQ data of GSM/EDGE and CPRI interface. The invention is able to satisfy the need of GSM/EDGE to IQ data transmission, and satisfy the CPRI protocol need, thereby realizing GSM/EDGE compatible with CPRI protocol.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to IQ (quadrature modulation) data of a kind of GSM/EDGE (enhanced data rates of global system for mobile communications/GSM evolution) communication system and the adaptation method of CPRI (common public radio interface) interface.
Background technology
Along with IT Technology ﹠ Telecommunications development of technology, the development, particularly GSM mobile network that mobile communication has obtained advancing by leaps and bounds develops particularly rapid, and the user surpasses 2,000,000,000.In addition, wireless network architecture is constantly evolution forward also, and the CPRI standard that is separated into principal character with base band and radio frequency more and more causes the attention of industry.The CPRI standard definition interface between modular base station architecture and base band and the radio-frequency module, like this, more device manufacturer and module manufacturer can participate in the manufacturing of base station, thereby reduce cost, on the other hand, the CPRI agreement also meets the development trend of distributed wireless networks, so CPRI becomes the key character of BSS (base station sub-system) new architecture.Because CPRI is based on the standard of WCDMA (Wideband Code Division Multiple Access (WCDMA)) standard, GSM/EDGE is not considered therefore, how GSM/EDGE pattern and CPRI agreement coupling are also become the problem that everybody relatively pays close attention to.
Summary of the invention
The technical problem to be solved in the present invention just provides the IQ data of a kind of GSM/EDGE and the adaptation method of CPRI interface, thereby makes the CPRI standard also be suitable for the GSM/EDGE standard.
In order to solve the problems of the technologies described above, the invention provides the IQ data of a kind of GSM/EDGE and the adaptation method of CPRI interface, comprising:
With the IQ data map of the burst Burst of GSM/EDGE in one group of basic frame Basic Frame of CPRI, the one group of such Basic Frame section of being called Segment; 13 Segment form one-period period, and 8 period are the mapping cycle that a duration is 60ms, are called mapping frame Mapping frame; Described Mapping frame comprises 6 radio frames Radio Frame; The a plurality of Mapping frame that generate are sent or receive through the CPRI interface.
Further, described IQ data map to a Segment with a Burst comprises:
The IQ data of a Burst are divided into a plurality of fixed-size data blocks, and each data block is mapped among the interior fixed-size data space Data Space of contained fan cycle AxC Period, and described AxCPeriod comprises the Basic Frame of fixed number.
Further, described AxC Period comprises a plurality of Data Space, a Data Space among the Burst IQ data occupancy AxC Period of one road GSM/EDGE writes AxC Period with the IQ data of the Burst of multichannel GSM/EDGE, is used to transmit multichannel GSM/EDGE data.
Further, when the IQ data map with Burst arrives Segment, insert the Segment sign in the blank AxC Period position that Segment begins, as the sign of GSM/EDGE burst.
Further, when inserting the Segment sign in the blank AxC Period position that Segment begins, the 60ms sign is inserted in the starting position of first Segment among the 60ms Mapping frame, as the synchronous sign of 60ms.
Further, when the IQ data map with Burst arrives Segment, in the AxC Period of Segment part blank, insert signaling information with the road.
Further, the size of described Data Space is 80bits, and described AxC period comprises 4 Basic Frame.
Further,
When the CPRI transmission rate is 614.4Mbps, at most 6 road Data Space are write among the AxCperiod.
When the CPRI transmission rate is 1228.8Mbps, at most 12 road Data Space are write among the AxC period.
When the CPRI transmission rate is 2457.6Mbps, at most 24 road Data Space are write among the AxC period.
Further, described Segment comprises two classes: Segment A and Segment B, and wherein Segment A comprises 2212 Basic Frame, and Segment B comprises 2216 Basic Frame.
Further, in each period, the arrangement mode of Segment A and Segment B is: ABBBBBABBBBBB.
Further, with the IQ data map of Burst in the GSM/EDGE IQ Block of Segment;
For downlink data, also attribute block Flag Block, user definition piece User defined signalBlock, free block Unused Block are write among the Segment, wherein among each Segment, FlagBlock comprises 4 Basic Frame, User defined signal Block comprises 12 Basic Frame, and Unused Block comprises 16 or 12 Basic Frame;
For upstream data, also Flag Block, Unused Block are write among the Segment, wherein among each Segment, Flag Block comprises 4 Basic Frame, Unused Block comprises 28 or 24 Basic Frame.
In order to solve the problems of the technologies described above, the invention provides also IQ data and the adaptive frame structure of CPRI interface of a kind of GSM/EDGE, it is characterized in that, each Mapping frame comprises 8 period, each period is made up of 13 Segment, the corresponding Segment of burst Burst among each GSM/EDGE, the duration of described Mapping frame is 60ms.
Further, described Segment comprises a plurality of AxC Period, and described AxC Period comprises the Basic Frame of fixed number; Described AxC Period comprises a plurality of fixed-size data space Data Space, a DataSpace among the Burst IQ data corresponding A xC Period of every road GSM/EDGE, and an AxC Period comprises the IQ data of at least one road GSM/EDGE.
Further, the size of described Data Space is 80bits, and described AxC period comprises 4 Basic Frame.
Further, described Segment comprises two classes: Segment A and Segment B, and wherein Segment A comprises 2212 Basic Frame, and Segment B comprises 2216 Basic Frame.
Further, in each period, the arrangement mode of Segment A and Segment B is: ABBBBBABBBBBB.
Further, for downlink data, described Segment comprises Flag Block, GSM/EDGEIQ Block, User defined signal Block, Unused Block, wherein among each Segment, Flag Block comprises 4 Basic Frame, GSM/EDGE IQ Block comprises 2184 BasicFrame, and User defined signal Block comprises 12 Basic Frame, and Unused Block comprises 16 or 12 Basic Frame.
Further, for upstream data, described Segment comprises Flag Block, GSM/EDGEIQ Block, Unused Block, wherein among each Segment, Flag Block comprises 4 BasicFrame, GSM/EDGE IQ Block comprises 2184 Basic Frame, and Unused Block comprises 28 or 24 Basic Frame.
Method of the present invention satisfies the demand of GSM/EDGE to the IQ transfer of data, also can satisfy the CPRI protocol requirement simultaneously, thereby realizes the compatible CPRI agreement of GSM/EDGE.
Description of drawings
Fig. 1 is the CPRI protocol architecture;
Fig. 2 is a CPRI Radio Frame structure;
Fig. 3 is a CPRI interface Basic Frame structure (1228.8bmps);
Fig. 4 is the Mapping frame frame structures of embodiment of the invention GSM/EDGE IQ data to the CPRI mapping;
Fig. 5 is the AxC period structure of the embodiment of the invention;
Fig. 6 is the descending segment frame format of the embodiment of the invention;
Fig. 7 is the descending symbol IQ data and the AxC period mapping relations of the embodiment of the invention;
Fig. 8 is the up AxC period structure of the embodiment of the invention;
Fig. 9 is the up Segment frame format of the embodiment of the invention;
Figure 10 is the IQ data array of the up symbol of the embodiment of the invention.
Embodiment
The present invention is described in detail below in conjunction with drawings and the specific embodiments.
For content of the present invention better is described, at first introduce the data format of CPRI protocol architecture and GSM/EDGE numeral IQ signal.
CPRI has defined layer1 and layer2 two layer protocols and has been used for the data of transmission user face and chain of command, and Synchronization Control, and protocol architecture as shown in Figure 1.Physical layer (layer1) has defined the speed of CPRI interface, coding, and contents such as frame format and IQ data map, link layer (layer2) has defined the contents such as frame format of chain of command data.
Defined multi-frame structure in the CPRI interface specification, as shown in Figure 2.In UMTS, a Radio Frame (radio frames) is by BFN (Node B Frame Number, the NodeB frame number) numbering, comprise 150 Hyperframe (superframe), Hyperframe comprises 256 Basic Frame (basic frame), Basic Frame comprises some Word (word), and W represents word number among the Basic Frame among the figure, and Y represents byte among the Word (bit) number.The time span of a Radio Frame is 10ms.In the control byte of Radio Frame radio frames, insert special synchronization character (Commba byte), just can realize the 10ms clock synchronization between REC (wireless instruments controller) and the RE (wireless device).
Basic Frame is the elementary cell of CPRI frame structure, the BasicFrame structure of the 1228.8Mbps that Fig. 3 represents.W represents the word number among the Basic Frame among the figure, and the W value is 0～15, and the word of W=0 is control word (control word), and remaining 15 word is IQ Data Block (an IQ data block); Y represents the byte number that word comprises among the Basic Frame, and the value of Y is corresponding with three kinds of transmission rates of CPRI, and during Y=0, CPRI speed is 614.4Mbps, and during Y=1, CPRI speed is 1228.8Mbps, and during Y=3, CPRI speed is 2457.6Mbps.The control word data space that is used for control information transmission is (Y+1) * 8bits; The space that is used to transmit the IQ data is 15 * (Y+1) * 8bits.As shown in Figure 3, when 1228.8Mbps speed, control word is 16bits, and IQ Data Block is 240bits.The length of Basic Frame (cycle) all is T=1/3.84MHz.Can consult CPRI agreement V2.0 version about the detailed content of CPRI agreement.
The character rate of stipulating each burst (Burst) in the GSM standard is 270.833kbps, and the character of transmission is 156.25, and duration 15/26ms is about 577us; 8 Burst are a tdma frame, and time span is about 4.615ms.The IQ data of GSM/EDGE are meant the digital IQ signal between base band and the radio frequency among the present invention, and described character IQ data volume and data rate are as shown in the table:
| Requirement definition | Requirements | Remarks |
| Up IQ sampling width | 24bits | |
| Up |
2 |
| Up |
2 | |
| Up symbol IQ data volume | 192bits | |
| Up IQ data rate | 52Mbps | Each Burst calculates according to 156.25symbol |
| Descending IQ sampling width | 16bits | |
| Descending IQ sample rate | 8 | |
| Descending symbol IQ data volume | 256bits | |
| Descending IQ data rate | 69.33Mbps | Each Burst calculates according to 156.25symbol |
Descending Burst follows some power control informations and PLL (phase-locked loop) information in addition.
The upstream sampling width is less than 24bits, and the over-sampling multiple is less than 2 times, and descending sampling width is less than 16bits, and over-sampling rate can adopt adaptation method of the present invention less than 8 times GSM/EDGE IQ data.
Because useful information is 148symbols (character) among each Burst, remaining 8.25symbol is the protection bit, in order to transmit conveniently, only transmits 156 symbol among each Burst of definition up-downgoing among the present invention.In addition, C﹠amp between the REC of GSM/EDGE and the RE; M (control and maintenance) message also needs to transmit by the CPRI interface.
On physical layer, exist than big-difference between CPRI and the GSM/EDGE, the difference of user's face is mainly reflected in IQ data rate and synchronised clock aspect, and the difference of chain of command is embodied in aspects such as HDLC speed and message format.All make every effort to RE in general system design and be simple and easy to safeguard that therefore, the content of the Signalling exchange between REC and the RE is few generally speaking that the speed of CPRI and message format can satisfy the demand of GSM/EDGE standard.
Therefore, the invention provides a kind of GSM/EDGE IQ data in the mapping of CPRI interface and adaptive method, this method satisfies the demand of said GSM/EDGE to the IQ transfer of data, also can satisfy the CPRI protocol requirement simultaneously, thereby realizes the compatible CPRI agreement of GSM/EDGE.
In order to realize of the mapping of GSM/EDGE IQ data at the CPRI interface, in the present invention, base band or radio frequency unit successively the IQ data map of the time slot of GSM/EDGE (i.e. Burst) in one group of Basic Frame of CPRI, for convenience, the present invention is called Segment (section) with one group of such BasicFrame.
13 Segment form a period (cycle), and 8 period are called Mapping frame (mapping frame) as the mapping cycle that a duration is 60ms; The IQ data that comprise 104 Burst in the GSM/EDGE 60ms are mapped to a Mapping frame successively and comprise among 104 Segment, and promptly 6 Radio Frame comprise 104 Segment altogether.
In a Segment, base band or radio frequency unit are divided into some fixed-size data blocks with the IQ data of a Burst, and each data block is mapped among the interior fixed-size data space Data Space (data field) of Basic Frame.Several Data Space form an AxC Period, and described AxC Period comprises the Basic Frame of fixed number, and a Segment comprises several AxCPeriod.
In when mapping, one road GSM/EDGE carrier wave Burst IQ data only take a Data Space among the AxC Period, the IQ data block that such AxC period can multiplexing multichannel carrier Burst.
Because the CPRI link rate is bigger than GSM/EDGE IQ speed, some AxCPeriod are not filled by the IQ data in Segment.Insert the Segment sign in the blank AxC Period position that Segment begins, wherein the 60ms sign is inserted in the starting position of first Segment among the 60ms Mapping frame.Above-mentioned sign is respectively as GSM/EDGE burst and the synchronous sign of 60ms.
Base band or radio frequency unit insert the signaling information with the road in some blank AxC Period of Segment.
Below mapping mode and frame structure are specifically described:
The IQ data of the GSM/EDGE of the embodiment of the invention to CPRI mapping and adaptive frame structure as shown in Figure 4.Get among the present invention the frame clock (10ms) of CPRI and GSM/EDGE frame clock (4.615ms) common multiple---60ms is as GSM/EDGE IQ data synchronization clock.60ms is equivalent to 104 GSM/EDGE bursts, also is the time span of 6 CPRI radio frames Radio Frame.The present invention defines that 6 continuous Radio Frame are a Mapping frame (each Mapping frame comprises 230400 Basic Frame) among the CPRI; Mapping frame is divided into 8 period (each period comprises 28800 Basic Frame); In order to guarantee the integrality of Basic Frame, a period is divided into 13 Segment, wherein 2 is category-A Segment (Segment A), all the other 11 is category-B Segment (Segment B), Segment A comprises 2212 Basic Frame, Segment B comprises 2216 Basic Frame, and the arrangement mode of Segment A and Segment B is: ABBBBBABBBBBB.Segment B has been Duoed 4 idle Basic Frame than Segment A, and other partial data forms are consistent.Mapping frame just is compared average 104 Segment that have been divided into like this, and each Segment is used for transmitting the IQ data of a burst among the GSM/EDGE.No matter be Segment A or Segment is B, all will transmit the IQ data of up 52Mbps or descending 69.33Mbps and follow message.
Said method has been determined the synchronised clock of the compatible CPRI agreement of GSM/EDGE, and, IQ data and the Segment of each burst of GSM/EDGE set up mapping relations.
Because three kinds of speed of the support of CPRI interface are all greater than the up-downgoing IQ data rate of GSM, so, IQ data that can multiplexing multichannel GSM/EDGE carrier wave in a Segment.For multiplexing GSM/EDGE carrier wave as much as possible, and consider and reduce the complexity that technology realizes, the present invention proposes 4 Basic Frame are formed one group, as a basic GSM/EDGE IQ data multiplex unit, be called AxC period (contained fan cycle), several AxC period transmit one or several GSM/EDGE symbol.Because 2212 and 2216 can be divided exactly by 4, so Segment A and Segment B can mate with AxC period.
AxC period has comprised 4 Basic Frame, its IQ data space is 60 word (4 * 15), the present invention on average is divided into N Data Space to the IQ data space of these 60 word, the size of Data Space is fixed as 80bits, each Data Space carries the IQ data of one road GSM/EDGE carrier wave, promptly can carry N carrier wave in an AxC period.For the IQ data of GSM/EDGE, every road IQ data in each AxC period, only take n DataSpace (n=0,1...N-1).
The N value is relevant with the CPRI transmission rate, because the size of data space is 80bits, the IQ data space of basic frame is determined under the different rates so, for example, 1.2288Gbps the time, BF IQ data space is this 240/80=3 of 240bits, each AxC period has 4 BF, therefore, N=3 * 4=12.
When the CPRI transmission rate is 614.4Mbps, N=6, the size of Data Space is 10 word; When the CPRI transmission rate is 1228.8Mbps, N=12, the size of Data Space is 5 word; When the CPRI transmission rate is 2457.6Mbps, N=24, the size of Data Space is 2.5 word.
1228.8Mbps the AxC period under the speed as shown in Figure 5, the IQ data that AxC period can multiplexing 12 road GSM/EDGE carrier waves are used CH0 respectively, CH1, ..., CH11 represents that every road carrier wave takies a Data space (80bits) in AxC Period.GSM/EDGE IQ data are mapped among the Data Space according to CPRI regulation IQ arrangement mode.
The up-downgoing IQ data rate of GSM/EDGE is unbalanced, the IQ data volume of symbol is also different, therefore, the mapping relations of up-downgoing symbol and AxC period are also variant, CPRI frame format with 1228.8Mbps is an example below, and the symbol of GSM/EDGE and the mapping relations between AxC period and the segment are described.
The mapping relations of descending symbol of GSM/EDGE and Segment.
The mapping relations of descending symbol of GSM/EDGE and Segment as shown in Figure 6, a descending Segment is divided into several functional areas, wherein preceding 4 Basic Frame are as Flag Block (attribute block) (1 AxC Period, Basic Frame0-Basic Frame3), ensuing 2184 Basic Frame are as GSM/EDGE IQ Block (GSM/EDGE IQ piece) (546 AxC Periods, BasicFrame4-Basic Frame2187), 12 Basic Frame are as User defined signal Block (user definition piece) (3 AxC Periods, Basic Frame2188-Basic Frame2199), last 16 Basic Frame are Unused Block (free block) (3AxC Periods, Basic Frame2200-Basic Frame2215).Descending category-A Segment lacks the BasicFrame of 4 free time than category-B Segment, and remainder is identical.
In the GSM/EDGE IQ Block functional areas, per 14 AxC Period (totally 56 BasicFrame) are one group, can transmit 4 Symbol, wherein, preceding 13 AxC Period are used for transmitting 4 Symbol IQ data of 512bits altogether, the 14th AxC Period free time.In order to narrate conveniently, this paper is numbered the unit in 14 the every group AxC Period scopes: AxC Period sequence number is AxC Period0～AxC Period13; Basic Frame sequence number is Basic Frame0～BasicFrame55; The sequence number of Symbol is Symbol0～Symbol3.Entire I Q Block comprises 39 such AxC period groups, and totally 546 AxC Period transmit the IQ data of descending 156 Symbol.
Be that the IQ data that example is described further these 4 Symbol distribute with the CH0 among Fig. 7 below: the IQ data occupancy of Symbol0 Basic Frame0, Basic Frame4, each 80bits of Basic Frame8 and the preceding 16bits of Basic Frame12,256bits altogether; Symbol1 has taken the back 64bits of Basic Frame12, Basic Frame16 and each 80bits of Basic Frame20, the preceding 32bits of Basic Frame24,256bits altogether; Symbol2 has taken the back 48bits of Basic Frame24, Basic Frame28 and each 80bits of Basic Frame32, the preceding 48bits of Basic Frame36,256bits altogether; Symbol3 has taken the back 32bits of Basic Frame3 6, Basic Frame40 and each 80bits of Basic Frame44, the preceding 64bits of Basic Frame48,256bits altogether; The remaining 16bits DataSpace free time among the Basic Frame48.Here the 80bits in the said Basic Frame is meant the Data Space of CH0 in AxC Period.
Flag Block functional areas comprise an AxCperiod, content is that length is the fixed byte of 64bits, synchronous mark as 60ms Mapping frame or segment, wherein 60ms Mappingframe synchronous mark is called 60ms Flag, represent the beginning of a 60ms Mapping frame, the synchronous mark of Segment is called Burst Flag, the beginning of the Segment in the expression 60ms Mapping frame, in addition, 60ms Flag also is the synchronous head of Segment.
User defined block functional areas comprise 3 AxC period, and some follow message, the remainder free time to be used for transmitting descending power information etc.
The mapping relations of up symbol of GSM/EDGE and Segment:
Up IQ data volume is littler than descending, and the GSM/EDGE carrier wave only takies preceding 64bits at the DataSpace of each AxC period, the 16bits free time of back, sees Fig. 8.
The mapping relations of up symbol of GSM/EDGE and Segment as shown in Figure 9, in GSM/EDGE IQ Block, per 7 AxC Period (28 Basic Frame) are one group, can transmit 2 Symbol, preceding 6 AxC Period are used for transmitting 2 Symbol IQ data of 384bits altogether, the 7th AxC Period free time.In order to narrate conveniently, this paper is numbered the unit in every group of 7 AxCPeriod scopes: AxC Period sequence number is AxC Period0～AxCPeriod6; Basic Frame sequence number is Basic Frame0～Basic Frame27; The sequence number of Symbol is Symbol0 and Symbol1, and all numeric order put in order identical with the sequence number of interior 2216 the Basic Frame of category-B Segment.GSM/EDGE IQ Block comprises 78 such AxC Period groups, and totally 546 AxC Period transmit the IQ data of up 156 Symbol.
In AxC Period group, it is such that the IQ data of two Symbol distribute: Symbol0 has taken the 3 * 64=192bits of 3 Data Space among AxC Period0～AxC Period2, and Symbol1 has taken 3 * 64=192bits of inner three the Data Space of AxC Period3～AxC Period5.The 96bits IQ data occupancy that Symbol0 samples for the first time the 64bits of Basic Frame0 and the preceding 32bits of Basic Frame4, the 96bits of sampling has taken the back 32bits of Basic Frame4 and the 64bits of Basic Frame8 for the second time; The 96bits IQ data occupancy that Symbol1 samples for the first time the 64bits of Basic Frame12 and the preceding 32Bits of Basic Frame16, the 96bits of sampling has taken the back 32bits of Basic Frame16 and the 64bits of Basic Frame20 for the second time.Here 64bits and 32bits in the said BasicFrame are meant the Data Space of CH0 in each AxC Period.What Figure 10 represented is IQ data arrangement mode in AxC period of a GSM/EDGE symbol.
Among Figure 10, Primary and Diversity are main collection and ranked data, can be understood as the data that two antennas are adopted, and also have first sampled data, second sampled data is actually a point (antenna is adopted next data) and has carried out double sampling, and this is the agreement regulation.
Flag Block data format is identical with descending Flag Block data format, remaining BasicFrame free time.
By method of the present invention, set up mapping and fitting relation between GSM/EDGE IQ data and the CPRI agreement physical layer, this method does not change the line speed of CPRI physical layer, frame format, characteristics such as code encoding/decoding mode.When GSM/EDGE IQ data according to the method for the invention when the CPRI interface transmits, REC and RE except the 10ms that sets up CPRI synchronously, also to set up the 60ms synchronized relation, REC stamps 60ms clock label in the Flag Block of first Segment of Mapping frame, be 60ms Flag mentioned above, then, RE is by reading 60ms Flag sign, and it is synchronous to set up 60ms.RE has determined that 60ms synchronous head sign just can determine the inner all the elements of Mapping frame, thereby correctly separates frame, obtains GSM/EDGE IQ data.
The method of the invention can satisfy CPRI protocol specification and the GSM/EDGE demand to the IQ transfer of data.
Claims (18)
1. the adaptation method of the IQ data of a GSM/EDGE and CPRI interface is characterized in that, comprising:
With the IQ data map of the burst Burst of GSM/EDGE in one group of basic frame Basic Frame of CPRI, the one group of such Basic Frame section of being called Segment; 13 Segment form one-period period, and 8 period are the mapping cycle that a duration is 60ms, are called mapping frame Mapping frame; Described Mapping frame comprises 6 radio frames Radio Frame; The a plurality of Mapping frame that generate are sent or receive through the CPRI interface.
2. adaptation method according to claim 1 is characterized in that, described IQ data map to a Segment with a Burst comprises:
The IQ data of a Burst are divided into a plurality of fixed-size data blocks, and each data block is mapped among the interior fixed-size data space Data Space of contained fan cycle AxC Period, and described AxCPeriod comprises the Basic Frame of fixed number.
3. adaptation method according to claim 2, it is characterized in that, described AxC Period comprises a plurality of Data Space, a Data Space among the Burst IQ data occupancy AxC Period of one road GSM/EDGE, the IQ data of the Burst of multichannel GSM/EDGE are write AxC Period, be used to transmit multichannel GSM/EDGE data.
4. adaptation method according to claim 2 is characterized in that, when the IQ data map with Burst arrives Segment, inserts the Segment sign in the blank AxC Period position that Segment begins, as the sign of GSM/EDGE burst.
5. adaptation method according to claim 4, it is characterized in that, when the Segment sign was inserted in the blank AxC Period position that Segment begins, the 60ms sign was inserted in the starting position of first Segment among the 60ms Mapping frame, as the synchronous sign of 60ms.
6. adaptation method according to claim 2 is characterized in that, when the IQ data map with Burst arrives Segment, inserts the signaling information with the road in the AxC Period of Segment part blank.
7. adaptation method according to claim 2 is characterized in that, the size of described Data Space is 80bits, and described AxC period comprises 4 Basic Frame.
8. adaptation method according to claim 3 is characterized in that,
When the CPRI transmission rate is 614.4Mbps, at most 6 road Data Space are write among the AxCperiod;
When the CPRI transmission rate is 1228.8Mbps, at most 12 road Data Space are write among the AxC period;
When the CPRI transmission rate is 2457.6Mbps, at most 24 road Data Space are write among the AxC period.
9. adaptation method according to claim 1 is characterized in that, described Segment comprises two classes: Segment A and Segment B, and wherein Segment A comprises 2212 Basic Frame, and Segment B comprises 2216 Basic Frame.
10. adaptation method according to claim 9 is characterized in that, in each period, the arrangement mode of Segment A and Segment B is: ABBBBBABBBBBB.
11. adaptation method according to claim 1 is characterized in that, with the IQ data map of Burst in the GSM/EDGE IQ Block of Segment;
For downlink data, also attribute block Flag Block, user definition piece User defined signalBlock, free block Unused Block are write among the Segment, wherein among each Segment, FlagBlock comprises 4 Basic Frame, User defined signal Block comprises 12 Basic Frame, and Unused Block comprises 16 or 12 Basic Frame;
For upstream data, also Flag Block, Unused Block are write among the Segment, wherein among each Segment, Flag Block comprises 4 Basic Frame, Unused Block comprises 28 or 24 Basic Frame.
12. the IQ data of a GSM/EDGE and the adaptive frame structure of CPRI interface, it is characterized in that, each Mapping frame comprises 8 period, each period is made up of 13 Segment, the corresponding Segment of burst Burst among each GSM/EDGE, the duration of described Mapping frame is 60ms.
13. frame structure according to claim 12 is characterized in that, described Segment comprises a plurality of AxC Period, and described AxC Period comprises the Basic Frame of fixed number; Described AxCPeriod comprises a plurality of fixed-size data space Data Space, a Data Space among the BurstIQ data corresponding A xC Period of every road GSM/EDGE, and an AxC Period comprises the IQ data of at least one road GSM/EDGE.
14. frame structure according to claim 13 is characterized in that, the size of described Data Space is 80bits, and described AxC period comprises 4 Basic Frame.
15. frame structure according to claim 12 is characterized in that, described Segment comprises two classes: Segment A and Segment B, and wherein Segment A comprises 2212 Basic Frame, and Segment B comprises 2216 Basic Frame.
16. frame structure according to claim 15 is characterized in that, in each period, the arrangement mode of Segment A and Segment B is: ABBBBBABBBBBB.
17. frame structure according to claim 12, it is characterized in that, for downlink data, described Segment comprises Flag Block, GSM/EDGE IQ Block, User defined signal Block, Unused Block, wherein among each Segment, Flag Block comprises 4 Basic Frame, GSM/EDGE IQ Block comprises 2184 Basic Frame, User defined signal Block comprises 12 Basic Frame, and Unused Block comprises 16 or 12 Basic Frame.
18. frame structure according to claim 12, it is characterized in that, for upstream data, described Segment comprises Flag Block, GSM/EDGE IQ Block, Unused Block, wherein among each Segment, Flag Block comprises 4 Basic Frame, and GSM/EDGE IQ Block comprises 2184 Basic Frame, and Unused Block comprises 28 or 24 Basic Frame.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010072114A1 (en) * | 2008-12-25 | 2010-07-01 | 中兴通讯股份有限公司 | Wideband code division multiple access (wcdma) system and global system for mobile communication (gsm) system compatibility realizing method and apparatus |
| CN102307395A (en) * | 2011-09-02 | 2012-01-04 | 中兴通讯股份有限公司 | Method for transmitting IQ data of GSM/EDGE by CPRI interface |
| CN102624512A (en) * | 2012-02-22 | 2012-08-01 | 中兴通讯股份有限公司 | Method and system for realizing clock synchronization |
| CN104917533A (en) * | 2015-05-21 | 2015-09-16 | 杭州威力克通信***有限公司 | Method, device and system for IQ data compression |
| WO2018058550A1 (en) * | 2016-09-30 | 2018-04-05 | 海能达通信股份有限公司 | Data mapping method, apparatus, and device |
| CN109997383A (en) * | 2016-12-09 | 2019-07-09 | 华为技术有限公司 | Method for converting protocol and device |
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2007
- 2007-06-15 CN CNA2007101127635A patent/CN101325737A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010072114A1 (en) * | 2008-12-25 | 2010-07-01 | 中兴通讯股份有限公司 | Wideband code division multiple access (wcdma) system and global system for mobile communication (gsm) system compatibility realizing method and apparatus |
| CN101466172B (en) * | 2008-12-25 | 2011-02-23 | 中兴通讯股份有限公司 | Method and device for implementing compatibility of WCDMA system and GSM system |
| US8842654B2 (en) | 2008-12-25 | 2014-09-23 | Zte Corporation | Method and apparatus for realizing compatibility between a WCDMA system and a GSM system |
| CN102307395A (en) * | 2011-09-02 | 2012-01-04 | 中兴通讯股份有限公司 | Method for transmitting IQ data of GSM/EDGE by CPRI interface |
| CN102624512A (en) * | 2012-02-22 | 2012-08-01 | 中兴通讯股份有限公司 | Method and system for realizing clock synchronization |
| CN102624512B (en) * | 2012-02-22 | 2015-10-21 | 中兴通讯股份有限公司 | A kind of method and system realizing clock synchronous |
| CN104917533A (en) * | 2015-05-21 | 2015-09-16 | 杭州威力克通信***有限公司 | Method, device and system for IQ data compression |
| CN104917533B (en) * | 2015-05-21 | 2018-05-01 | 杭州威力克通信***有限公司 | A kind of I/Q data compression method, device and system |
| WO2018058550A1 (en) * | 2016-09-30 | 2018-04-05 | 海能达通信股份有限公司 | Data mapping method, apparatus, and device |
| CN109997383A (en) * | 2016-12-09 | 2019-07-09 | 华为技术有限公司 | Method for converting protocol and device |
| CN109997383B (en) * | 2016-12-09 | 2021-09-07 | 华为技术有限公司 | Protocol conversion method and device |
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