CN103199916B - A kind of data transmission method of Remote Radio Unit - Google Patents
A kind of data transmission method of Remote Radio Unit Download PDFInfo
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- CN103199916B CN103199916B CN201210000774.5A CN201210000774A CN103199916B CN 103199916 B CN103199916 B CN 103199916B CN 201210000774 A CN201210000774 A CN 201210000774A CN 103199916 B CN103199916 B CN 103199916B
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Abstract
A data transmission method for Remote Radio Unit, the method comprises: the capacity calculating transmission unit according to the requirement of real-time of data to be transmitted; The data type comprised by the number of data to be transmitted respective cell, each community obtains control information; According to the data block that the data volume determination data to be transmitted of the capacity of described transmission unit, the capacity of described control information and data to be transmitted is corresponding; Transmit described control information and described data block.After the application embodiment of the present invention, ensure autgmentability and the effective bandwidth of transfer of data.
Description
Technical field
The present invention relates to communication technical field, more specifically, relate to a kind of data transmission method of Remote Radio Unit.
Background technology
Data between indoor baseband processing unit (BBU) and Remote Radio Unit (RRU) are transmitted on optical fiber.Except transmission BBU and RRU needs mutual data, host-host protocol needs bearing fiber latency measurement information simultaneously, RRU eats dishes without rice or wine timing information etc.Mutual data type to be divided the framework of whole base station system by BBU and RRU and determines, optical-fiber time-delay metrical information and RRU timing information of eating dishes without rice or wine is determined by host-host protocol.
Along with more and more higher to base station system treat Capability Requirement, the structure of BBU and RRU divides will variation thereupon.The data class of Remote Radio Unit transmission is in change, and the data volume of often kind of data type is also in change.The feature that the transmission of Remote Radio Unit not only needs flexible adaptation data volume to change, also should reduce the data volume self introduced, to improve the effective rate of utilization of transmission bandwidth simultaneously as far as possible.
Following two schemes is had in the middle of prior art.
Scheme 1, definition transmission frame-form, data arrange according to fixed form in frame structure.
Advantage: timing information is carried on transmission frame-form itself, does not take transmission bandwidth, different types of data occupies diverse location and is convenient to resolve.
Shortcoming: data class or data volume change, needs data to reset in frame, expands poor, dumb.
With common public radio interface (CPRI) frame structure transmission data instance.In each subframe, down direction transmits two kinds of data, and type is A and B; Up direction transmits 3 kinds of data types, and type is A, C and D.
Due to up-downgoing data class and data volume inconsistent, if define the arrangement mode of up-downgoing data respectively, then cause up-downgoing inconsistent, complexity increases.To accomplish that up-downgoing is consistent, then need all to arrange A, B, C, D in each subframe, then cause IR (interface between BBU and RRU) bandwidth demand to increase.Meanwhile, if the data volume of certain data type changes, or add new data type, or up be in debugging mode no longer transmit normal business datum but transmission tune-up data time, then need the arrangement mode redefining data, autgmentability is poor.
Scheme 2, definition transmission packet structure, transmission data are transmitted in transmission package.
Advantage: flexibly, link reliability is high in expansion.
Shortcoming: agreement self information is many, pack arrangement is complicated, and effective bandwidth is low.
For SRIO agreement, IR is upper except transmitting the control information of data and differentiation data necessity, also will transmit packet header bag tail information and the system timing information of SRIO agreement itself, because this reducing the effective bandwidth of system.In addition, SRIO bag physical layer also will transmit the K code distinguishing packet boundary, reduce further the transmission bandwidth of valid data.
Summary of the invention
The embodiment of the present invention proposes a kind of data transmission method of Remote Radio Unit, ensures autgmentability and the effective bandwidth of transfer of data.
The technical scheme of the embodiment of the present invention is as follows:
A data transmission method for Remote Radio Unit, the method comprises:
The capacity of transmission unit is calculated according to the requirement of real-time of data to be transmitted;
The data type comprised by the number of data to be transmitted respective cell, each community obtains control information;
According to the data block that the data volume determination data to be transmitted of the capacity of described transmission unit, the capacity of described control information and data to be transmitted is corresponding;
Described control information and described data block is transmitted in transmission unit.
The capacity that the described requirement of real-time according to data to be transmitted calculates transmission unit comprises: the requirement of real-time of data to be transmitted is high, and the capacity of transmission unit is identical with the capacity of the basic frame of common public radio interface CPRI.
The capacity that the described requirement of real-time according to data to be transmitted calculates transmission unit comprises: the requirement of real-time of data to be transmitted is low, and the capacity of transmission unit equals 4 times of the basic frame capacity of CPRI.
The described data type comprised by the number of data to be transmitted respective cell, each community obtains control information and comprises: the number of data to be transmitted respective cell is N, and the cell ID bit number in control information equals log
2n; The number of the data type that each community comprises is M, and the data type identification bit number in control information equals log
2m; Control information also comprises the data original position mark of 1 bit.
The capacity of the described capacity according to described transmission unit, described control information and data block corresponding to data to be transmitted amount determination data to be transmitted comprise:
The capacity A of described data block is the maximum approximate number of the data to be transmitted amount being less than residual capacity; Obtain described data block according to A cutting data to be transmitted, the capacity that described residual capacity equals described transmission unit deducts the capacity of described control information.
Describedly in transmission unit, transmit described control information comprise with described data block: the control information that the different data to be transmitted of time-sharing send is corresponding in transmission unit and data block.
Described method comprises further:
According to described control information, data receiver judges that the current level of described data block and data receiver matches, then extract described data block;
According to described control information, data receiver judges that described database does not mate with the current level of data receiver, then described data block is sent to subordinate.
As can be seen from technique scheme, in embodiments of the present invention, the capacity of transmission unit is calculated according to the requirement of real-time of data to be transmitted; For the capacity not being both requirement of real-time calculating transmission unit.The data type comprised by the number of data to be transmitted respective cell, each community obtains control information, and control information can increase content according to specific circumstances.According to the data block that the data volume determination data to be transmitted of the capacity of described transmission unit, the capacity of described control information and data to be transmitted is corresponding; Described control information and described data block is transmitted in transmission unit.Due to the concrete condition determination transmission unit according to data to be transmitted, data block and control information, therefore ensure that the autgmentability of transfer of data.In addition, the minimizing of control information ensures effective bandwidth effectively.
Accompanying drawing explanation
Fig. 1 is the data transmission method schematic flow sheet of embodiment of the present invention Remote Radio Unit;
Fig. 2 is the schematic diagram of embodiment of the present invention transmission data.
Embodiment
Express clearly clear for making the object, technical solutions and advantages of the present invention, below in conjunction with drawings and the specific embodiments, the present invention is further described in more detail.
In embodiments of the present invention, due to the concrete condition determination transmission unit according to data to be transmitted, data block and control information, therefore ensure that the autgmentability of transfer of data.In addition, the minimizing of control information ensure that effective bandwidth.
See the data transmission method schematic flow sheet that accompanying drawing 1 is Remote Radio Unit, specifically comprise the following steps:
Step 101, calculate the capacity of transmission unit according to the requirement of real-time of data to be transmitted.
In the application process of reality, the requirement of real-time of data to be transmitted is different.The capacity of transmission unit is calculated according to the requirement of real-time of data to be transmitted.Particularly, transmission unit size is X times of the basic frame sign of CPRI, and the maximum of X is 4, and minimum value is 1.
If transfer of data requirement of real-time is not high, X can be set to 4, because transmission unit is now comparatively large, then corresponding control information proportion is low; If transfer of data requirement of real-time is higher, then X is set to 1, because transmission unit is now less, shared by corresponding control information, bandwidth proportion is maximum, and system effect bandwidth is minimum.
Step 102, the data type comprised by the number of data to be transmitted respective cell, each community obtain control information.
Control information at least comprises cell ID, data type mark and original position mark, also increases the content in control information according to actual conditions.
The number of data to be transmitted respective cell is N, and the cell ID bit number in control information equals log
2n; The number of the data type that each community comprises is M, and the data type identification bit number in control information equals log
2m; Data original position is designated 1 bit.
Such as: system transfers 8 cell data, every community comprises 4 kinds of data types, N=8, M=4.Then this control information at least comprises log
2the cell ID of 8=3,3bit; log
2the data type mark of 4=2,2bit, 1bit data original position identifies.If log
2n is not integer, then the capacity of cell ID is greater than log
2the smallest positive integral of N; If log
2m is not integer, then the capacity of data type mark is greater than log
2the smallest positive integral of M.
Step 103, according to data block corresponding to the data volume determination data to be transmitted of the capacity of described transmission unit, the capacity of described control information and data to be transmitted.
Data to be transmitted is divided into multiple data block, and data to be transmitted transfers to receiving terminal with the form of data block by transmission unit.The capacity A of data block is the maximum approximate number of the data to be transmitted amount being less than residual capacity, obtains data block according to A cutting data to be transmitted, and the capacity that residual capacity equals described transmission unit deducts the capacity of control information.
Such as, containing 1200 data in 1 millisecond, and can transmit 70 data in transmission unit, control information takies 6 data bit.Then residual capacity is 70-6=64, due to 60 be 1200 approximate number, and 60 are less than residual capacity 64, and namely 60 is maximum approximate numbers of the data to be transmitted amount being less than residual capacity.Although 30 or 40 is also the approximate number of data to be transmitted amount, because 30 or 40 is not the maximum approximate number of the data to be transmitted amount being less than residual capacity, therefore data block size is 60.Same kind data block size is identical, and dissimilar data block size can be different.
Step 104, in transmission unit, transmit described control information and described data block.
Transmitting terminal is by data corresponding for data to be transmitted different types of data time-sharing send in transmission unit, and data comprise control information and data block.Due to the data block of the corresponding different capabilities of different types of data, therefore can time-sharing send.
According to the control information received, data receiver judges that whether current with the data receiver rank of data block corresponding to control information matches.If match, then represent that data block that this control information identifies is the data of needs at the corresponding levels, then extract described data block; If do not match, then described data block is sent to subordinate.
Be example below in conjunction with accompanying drawing 2, illustrate that three types data transfer to receiving terminal from transmitting terminal.
At transmitting terminal, transmitting terminal data processing module output type A, type B and type C data are to data transmission blocks.Data transmission blocks first determines the capacity of transmission unit and the control information of transmission unit, then according to the data block of step 103 difference compute type A, type B and Type C.At transmitting terminal, type A has A0 to AK, amounts to K+1 transmission unit; Type B has B0 to Bj, amounts to j+1 transmission unit; Type C has C0 to Ci, amounts to i+1 transmission unit.
By optical fiber by the K+1 of a type A transmission unit, j+1 transmission unit of type B and i+1 transmission unit of Type C are sent to receiving terminal.
In transmission unit, there is multiple data block, because the control information bit number in transmission unit is less, therefore do not embody in fig. 2.Wherein, control information can be placed on the optional position in this transmission unit.
First judge whether the data block of this transmission unit belongs to this rank according to the control information in transmission unit at receiving terminal, if belong to this rank, parse this data.Such receiving terminal obtains type A, type B and type C data.
Data transmission format on optical fiber is still based on the frame structure of CPRI, frame structure Further Division is transmission unit, each transmission unit only transmits a kind of data block in type A, B, C, needs transmission, then do not transmit any data as current without any data block.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a data transmission method for Remote Radio Unit, is characterized in that, the method comprises:
The capacity of transmission unit is calculated according to the requirement of real-time of data to be transmitted; The requirement of real-time of data to be transmitted is high, and the capacity of transmission unit is identical with the capacity of the basic frame of common public radio interface CPRI; The requirement of real-time of data to be transmitted is low, and the capacity of transmission unit equals 4 times of the basic frame capacity of CPRI;
The data type comprised by the number of data to be transmitted respective cell, each community obtains control information;
According to the data block that the data volume determination data to be transmitted of the capacity of described transmission unit, the capacity of described control information and data to be transmitted is corresponding;
Described control information and described data block is transmitted in transmission unit.
2. the data transmission method of Remote Radio Unit according to claim 1, it is characterized in that, the described data type comprised by the number of data to be transmitted respective cell, each community obtains control information and comprises: the number of data to be transmitted respective cell is N, and the cell ID bit number in control information equals log
2n; The number of the data type that each community comprises is M, and the data type identification bit number in control information equals log
2m; Control information also comprises the data original position mark of 1 bit.
3. the data transmission method of Remote Radio Unit according to claim 1, is characterized in that, the capacity of the described capacity according to described transmission unit, described control information and data block corresponding to data to be transmitted amount determination data to be transmitted comprise:
The capacity A of described data block is the maximum approximate number of the data to be transmitted amount being less than residual capacity; Obtain described data block according to A cutting data to be transmitted, the capacity that described residual capacity equals described transmission unit deducts the capacity of described control information.
4. the data transmission method of Remote Radio Unit according to claim 1, it is characterized in that, describedly in transmission unit, transmit described control information comprise with described data block: the control information that the different data to be transmitted of time-sharing send is corresponding in transmission unit and data block.
5. the data transmission method of Remote Radio Unit according to claim 1, it is characterized in that, described method comprises further:
According to described control information, data receiver judges that the current level of described data block and data receiver matches, then extract described data block;
According to described control information, data receiver judges that described database does not mate with the current level of data receiver, then described data block is sent to subordinate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210000774.5A CN103199916B (en) | 2012-01-04 | 2012-01-04 | A kind of data transmission method of Remote Radio Unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210000774.5A CN103199916B (en) | 2012-01-04 | 2012-01-04 | A kind of data transmission method of Remote Radio Unit |
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| CN103199916A CN103199916A (en) | 2013-07-10 |
| CN103199916B true CN103199916B (en) | 2015-08-12 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1529448A (en) * | 2003-10-11 | 2004-09-15 | 中兴通讯股份有限公司 | Method for receiving mobile station reverse channel quality indicating channel of CDMA base station |
| CN1788518A (en) * | 2003-05-13 | 2006-06-14 | 松下电器产业株式会社 | Radio base station device, communication terminal device, and control information transmission method |
| CN101924721A (en) * | 2009-06-10 | 2010-12-22 | 清华大学 | Method for determining downlink multi-access system transmission mode, transmitting end device and receiving end device |
| CN102118759A (en) * | 2011-03-02 | 2011-07-06 | 北京邮电大学 | Downlink transmission frequency division method for cooperating multipoint transmission system on the basis of service quality |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1233180C (en) * | 2001-11-24 | 2005-12-21 | Lg电子株式会社 | Block transmission dispatching technique |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1788518A (en) * | 2003-05-13 | 2006-06-14 | 松下电器产业株式会社 | Radio base station device, communication terminal device, and control information transmission method |
| CN1529448A (en) * | 2003-10-11 | 2004-09-15 | 中兴通讯股份有限公司 | Method for receiving mobile station reverse channel quality indicating channel of CDMA base station |
| CN101924721A (en) * | 2009-06-10 | 2010-12-22 | 清华大学 | Method for determining downlink multi-access system transmission mode, transmitting end device and receiving end device |
| CN102118759A (en) * | 2011-03-02 | 2011-07-06 | 北京邮电大学 | Downlink transmission frequency division method for cooperating multipoint transmission system on the basis of service quality |
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| CN103199916A (en) | 2013-07-10 |
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