CN104486241B - Down channel data processing method in base band resource pool - Google Patents
Down channel data processing method in base band resource pool Download PDFInfo
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Abstract
This application discloses the down channel data processing method in a kind of base band resource pool, including：Outlet buffering area is set in Base-Band Processing exit in advance；The outlet buffering area is sent into data selection after Base-Band Processing；According to time interval set in advance, take out data from the outlet buffering area and carry out front-end processing, the data of the progress front-end processing read from the outlet buffering area are subjected to serial number and recorded.Using the application, can occur the requirement of real-time for ensureing down channel data transfer during down channel time-out congestion in base band resource pool framework.
Description
Technical field
The application is related to wireless communication technology, the down channel data processing method more particularly in base band resource pool.
Background technology
Base band signal process is generally on the premise of real-time demand is met in traditional access network architecture, at special place
Manage and realized on device using fixed algorithm arrangement, the resource consumed is fixed, what the real-time performance of scheme was also to determine.But base
Stand resource pool platform architecture generally use general processor, multinomial processing task is scheduled by operating system, wherein physics
The real-time of layer processing is difficult to be protected compared with traditional platform, and uncertainty can also increase, thus inevitably run into super
When congestion problems：Other tasks of processor scheduling cause the calculating task dead time of physical layer Base-Band Processing long, exceed
Time limit allowed by real-time so that congestion occurs for follow-up business data processing.Hardly deposited in conventional baseband processing procedure
In this problem, so lacking the counte-rplan of this problem.
Specifically, traditional communication equipment is often that a manufacturer provides a whole set of solution, system maintenance or liter
Level dependence is high.And as energy resources anxiety, global mobile communication network operator faced increasingly serious cost in recent years
Pressure.Most of mainstream carriers generally possess the network of multiple different communication standards, for ensure network service quality, it is necessary to
Substantial amounts of base station is disposed to solve the problems, such as the network coverage.But site and the relative scarcity of machine room resource, with a large amount of base station deployments
Demand formed and be difficult to the contradiction coordinated.And because the keen competition of Mobile Communications Market, single user average income increases slowly
Even decline, the " profit " ability of operator does not improve therewith, and this will cause the compression of networking and equipment purchase investment.For
Industry is persistently got a profit to be considered with long-run development, and Mobile Communication Industry circle proposes that solving this by the change access network architecture asks
Topic.
Novel base station system architecture is as shown in figure 1, all baseband processing units (Baseband Unit, BBU) and distal end nothing
Line radio frequency unit (Radio Remote Unit, RRU) is connected by the optical transport network of high bandwidth, low latency.At base band
Reason unit concentrates on a physical site and forms baseband pool.By high bandwidth, low between multiple baseband processing units in baseband pool
Delay, flexibly topological, inexpensive interconnection.Base band resource pool needs to apply base station virtualization technology, more bases in baseband pool
Stand and share computing resource, and the distribution of computing resource unifies dynamic dispatching by system according to portfolio.And wireless signal processing is calculated
Method constitutes wireless communication system physical layer core processing, has the characteristics of computation-intensive, and faces harsh real-time and want
Ask.To ensure real-time that base station focuses on, reducing system energy consumption, virtualization technology is set to play hardware system to greatest extent
System performance, to support the communication system base band data of high-speed cruising to handle, it is necessary to be carried out to the calculating task of base band signal process
Divide and be encapsulated, the calculating task after encapsulation is focused on.Encapsulation scheme can be according to the resource of base station resource pond
Service condition is adjusted, to adapt to dynamic task allocation in multinuclear general processor and meet system requirement of real time.
Different from traditional base station, base station resource pond have accumulated substantial amounts of computing resource, and can to accommodate multiple cell multi-user data same
When handle, the requirement of real-time of wireless communication system physical layer signal transacting is higher, and by taking LTE system as an example, down channel is per 1ms
The data of a subframe are sent to user, up channel receives the data of a subframe per 1ms.Because resource pool platform architecture is led to
Frequently with general processor, multiple processing tasks are scheduled simultaneously by operating system, therefore physical layer process in resource pool
Following problems can inevitably be run into：Processor scheduling causes the calculating task dead time of physical layer Base-Band Processing long,
The regulation time limit is exceeded so that congestion occurs for follow-up business data, as shown in Figure 2.By the problem, referred to as " time-out is gathered around in the application
Plug ".
In Fig. 2, processor scheduled other processing calculating tasks during channel A calculating tasks are handled causes letter
Road A calculating tasks are stagnated, if the channel is up channel, due to receiving front-end processing it is real-time, may make
The data reached can not obtain timely processing and block, if the channel is down channel, due to sending the real-time of front-end processing
Property require high, data may be caused can not to be transported to front end in time.
This problem is hardly occurring used by traditional baseband processing unit (BBU) on application specific processor, but
Operating system intervention is scheduled processing to real time processing tasks on general-purpose platform, and handling overtime congestion causes real-time to be difficult to
The problem of guarantee, will highlight.And the technologies for handling congestions many at present, often for network packet congestion problems, corresponding solution
Certainly scheme can not be directly applied in the application to solve the problems, such as overtime congestion.
The content of the invention
This application provides the data processing method in base band resource pool, can occur time-out in base band resource pool framework
Ensure the requirement of real-time of data transfer during congestion.
To solve the above problems, the application adopts the following technical scheme that：
A kind of data processing method in base band resource pool, including：
Outlet buffering area is set in Base-Band Processing exit in advance a,；
B, the outlet buffering area is sent into the data selection after Base-Band Processing；According to time interval set in advance, from
The outlet buffering area takes out data and carries out front-end processing, by the number of the progress front-end processing read from the outlet buffering area
According to progress serial number and record；
Wherein, when no data in the outlet buffering area, empty data is read and the empty data are continued to number and remembered
Record；
Data selection after Base-Band Processing is sent into the mode of the outlet buffering area to be included：If the processing output of the data
Sequence number is less than or equal to the maximum numbering of the data of the progress front-end processing of current record, then abandons the data, be not sent into institute
State outlet buffering area；Otherwise, the data are sent into outlet buffering area；
Order volume when the processing output serial number of data after the Base-Band Processing data block export after Base-Band Processing
Number.
It is preferred that this method further comprises between the step a and b：It is equivalent for the data distribution before Base-Band Processing
Processing exports sequence number, the order of corresponding data block when being exported after the input data progress Base-Band Processing of the serial number Base-Band Processing
Numbering；
After overtime congestion occurs for down channel and terminates, overtime degree of Congestion O is estimatedM+δ-Ke, when overtime degree of Congestion is more than
Or during equal to 0, equivalent process is exported into serial number KeTo OM+ δ data abandon, and no longer carry out Base-Band Processing；
Wherein, OMFor the maximum numbering of the data of the progress front-end processing of current record, KeFor Base-Band Processing will be carried out
The equivalent process output sequence number of data, δ is natural number set in advance.
As seen from the above technical solution, a kind of data processing method is provided in the application, is set in Base-Band Processing exit
Buffering area is exported, and sends the downlink data read from outlet buffering area according to fixed intervals or sends empty data, for warp
The downlink data for failing to export on time for crossing Base-Band Processing carries out discard processing, meanwhile, for not carrying out Base-Band Processing in time
Stale data also directly abandons, and so as to ensure the requirement of real-time of downlink data transmission, saves baseband processing resource.
Brief description of the drawings
Fig. 1 is the schematic diagram of Novel base station system architecture；
Fig. 2 is the schematic diagram of overtime congestion；
Fig. 3 is the data processing method schematic flow sheet for down channel；
Fig. 4 is the schematic diagram that down channel data sent and exported buffer location；
Fig. 5 a and Fig. 5 b are respectively two exemplary plots for inquiring about data output sequence number table；
Fig. 6 sends data, exports an exemplary plot of sequence number table recording status when being and having data in outlet buffering area；
Data are sent when Fig. 7 is buffering area no data, export the exemplary plot of sequence number table recording status；
Fig. 8 is the exemplary plot for judging the stale data without Base-Band Processing.
Embodiment
In order that the purpose of the application, technological means and advantage are more clearly understood, the application is done below in conjunction with accompanying drawing
It is further described.
The application is intended to design the data processing method in base station resource pond, to tackle the overtime congestion of physical layer, ensures
The real-time of physical layer base band signal processing procedure.The processing of base station resource pond physical layer signal is made up of multiple channels, including upper
Row and down channel.The signal that up channel receives user terminal from air interface is sent at base band after certain processing
Reason, this uplink process have hard real time requirement in receiving terminal；And down channel by base station signal through Base-Band Processing
Certain processing is carried out afterwards, is sent by air interface to user terminal, and this transmitting procedure has hard real time in transmitting terminal
Property require.If overtime congestion occurs in down channel processing procedure, it may cause base station can not as the data of transmitting terminal
In time send, if overtime congestion occurs in up channel processing procedure, may cause base station as receiving terminal data without
Method obtains timely processing, can either way influence the real-time of base band resource pool physical layer process.
For the above-mentioned situation that real-time may be influenceed after overtime congestion occurs for down channel, the application provides accordingly
Data processing method, to avoid the real-time influence on physical layer process.
Specifically, the data processing shown in Fig. 3 is provided corresponding to situation of the base station as down channel transmitting terminal, the application
Method.Wherein, because the requirement of real-time of the transmission of down channel is high, using treatment method, in the exit of Base-Band Processing
Carry out the processing of overtime congestion control.As shown in figure 3, the flow includes：
Step 301, outlet buffering area is set in Base-Band Processing exit in advance.
For down channel, due to needing the data after Base-Band Processing and front-end processing being sent to use by air interface
Family terminal, as shown in figure 4, needing to carry out Real-time Ability operation in Base-Band Processing outlet.Based on this, in this method, in base band
Exit is handled using buffering area is exported, before making the data that Base-Band Processing finishes via being sent to after outlet buffering area buffered
End.Outlet buffering area can be divided into multiple buffer stoppers, the packet exported after each buffer stopper storage Base-Band Processing.
Step 302, before Base-Band Processing, sequence number is exported to enter the data assignment equivalent process of Base-Band Processing.
In physical layer channel, a variety of data processing units, such as transmission block, code block be present, into the number of Base-Band Processing
According to processing unit with output when and differ, in LTE system, down channel input data in units of transmission block, base
Output is in units of frame after tape handling, but fixed conversion relation between them be present.For convenience of subsequent step to overtime congestion
The estimation of degree to enter the data assignment equivalent process of Base-Band Processing, it is necessary to export sequence number.The sequence number is a natural count
Numbering, the sequence counted according to the relation of inputoutput data amount acquisition input data in output in units of output data unit
Number.For example, the corresponding 1 output data unit of m input data unit, then for every m input data unit assignment identical certainly
So number numbering.Numbering is using circulation natural count, n=1,2 ..., N.The equivalent process output sequence number of this step distribution will be in step
It is used for calculating and the relevant treatment for carrying out overtime degree of Congestion in rapid 305.
Step 303, it is the complete data distribution processing output sequence number of Base-Band Processing, and the data that will have been handled according to the sequence number
Optionally write-in outlet buffering area.
What this step was carried out is the write operation for exporting buffering area.For convenience of to data carry out Real-time Ability operation, it is necessary to
For the data block distribution processing output sequence number of the complete output of Base-Band Processing.Method for numbering serial is the data processing list exported with Base-Band Processing
Member is unit, and a natural number numbering, as processing output sequence number are sequentially allocated for the data block that baseband channel has been handled.Numbering
Method is using circulation natural count, n=1,2 ..., N.N exports sequence number for maximum processing, its value can contemplate available bit number with
And the size of labelled amount is configured.1 is returned to after counting down to up to N to restart to number.
When by Base-Band Processing complete data write-in outlet buffering area, it is contemplated that the control process of overtime congestion, can first
Sequence number is exported according to the processing of data, inquiry output sequence number table judges to carry out one, it is determined whether exports the Base-Band Processing
Data write-in outlet buffering area.Wherein, exporting sequence number table, from outlet, buffering area has read and carried out at front end for recording
The numbering of the data of reason, specifically establishing process will introduce in the outlet buffering area read operation of step 304.
When judging whether to need to write outlet buffering area, specifically, output data is read from output sequence number table
Maximum sequence number, if the sequence number is more than or equal to the data block processing output sequence number of inlet/outlet buffering area to be entered, judge the data
Block is out of date, it is not necessary to write-in outlet buffering area, directly discarding, it is not out of date and write outlet buffering area to be otherwise judged to data block.
Fig. 5 a and Fig. 5 b give the example of an inquiry data output sequence number table.In Fig. 5 a, number that Base-Band Processing finishes
The processing being allocated according to block exports serial number 4, the record of contrast output sequence number table, maximum serial number 2, illustrates current data block not
Expired writeable inlet/outlet buffering area.In Fig. 5 b, the allocated processing output serial number 4 of the data block that has handled, contrast output sequence
Number table, wherein the maximum recorded is 5, represent that the data block of currently processed output serial number 4 is out of date, directly discarding, no longer
Write-in outlet buffering area.
Step 304, from outlet, buffering area reads data at set time intervals, in the data output sequence number table of foundation
The output sequence number of middle record data, when exporting buffering area no data, empty data are exported, and update the data and remember in output sequence number table
The sequence number of record.
Because the data that baseband processing unit is exported to front end have hard real time requirement, the data of front end are delivered to
Block should have strict time interval, therefore to ensure to have lasting data to be sent by time requirement is sent, need to monitor front and rear sequence number
Whether whether counting is continuous, have data to supply out after time interval.Specifically,
First, establish output sequence number table the data block for being delivered to front end is numbered and recorded.The output sequence number of foundation
Table can be that a row record, and each is recorded as the data block sequence number for being delivered to front end on time, as shown in table 1.Its initial value is
0, no data output is represented, maximum is identical with the processing output sequence number maximum of data after Base-Band Processing, after reaching maximum,
The data block for subsequently delivering to front end is restarted to number, and the output sequence number recorded before is emptied.
| Output block sequence number |
| 1 |
| 2 |
| 3 |
| … |
Table 1 exports sequence number table
Then, whether there is data latency output according to fixed transmission time interval inspection outlet buffering area.If number
According to, then it is normal to read data, and update the output data sequence number recorded in output state table.If no data, output is empty
Data are filled, and empty data are continued to number and recorded in sequence number table is exported.Empty data refer to no information content
Data, such as 0.
Fig. 6 gives in outlet buffering area to have and sends data during data, exports an example of sequence number table recording status.Such as
Shown in Fig. 6, it is assumed that it is to be output to there is the data block of processing output serial number 4,5 etc. in outlet buffering area.The data of serial number 2,3
From outlet, buffering area is read block, therefore exports and output sequence number 2,3 is have recorded in sequence number table.Data have the strict time when sending
T is spaced, in the T time after the transmission of 3 number blocks, checks in outlet buffering area whether there is data latency.Have, send data
4, and No. 4 outputs of mark in sequence number table is exported.In addition, the data block that Base-Band Processing finishes is assigned to processing output sequence number 6
Write buffering area.
Processing method example during an overtime congestion of generation is provided again.Data, defeated are sent when Fig. 7 is buffering area no data
Go out the example of sequence number table recording status.As shown in fig. 7, cause base band defeated without the data being disposed due to overtime congestion occurs
Go out, after 3 numbers are sent in T time, buffering area still no data, then supplement empty data and send to front end.Exporting simultaneously
The 4th block number evidence is recorded in sequence number table to be sent.
From above-mentioned processing, export in sequence number table can timing in table successively record data output sequence number (including from
The data and empty data truly read in outlet buffering area), that is to say, that the output sequence number is not rely on data at base band
The processing output numbering being allocated after reason, but export the record for the output sequence number that the timing of sequence number table is voluntarily carried out.Do not sending out
In the case of the normal processing rhythm of raw overtime congestion, the processing output sequence number that the data after Base-Band Processing are allocated should be greater than
The maximum recorded in output sequence number table, such situation illustrate that the data transmission time after Base-Band Processing is not missed, and meet hair
Send the requirement of real-time.And after overtime congestion occurs, it may in time not performed due to Base-Band Processing, cause to export buffering area
There is no corresponding data to export, therefore empty data are sent in the corresponding transmission time, and accordingly renewal output sequence number table, treat
When being prepared to enter into outlet buffering area after the data base-band processing of congestion before, it is found that its transmission time has already passed by (i.e. step
The maximum that the processing output sequence number that data are allocated after Base-Band Processing described in 303 is less than or equal in output sequence number table), then
The data need not just be processed again, it is not necessary to enter inlet/outlet buffering area, can directly abandon.Until finding that processing output sequence number is big
In the maximum of output sequence number table, the data are just sent into outlet buffering area, to treat further to handle.Pass through above-mentioned processing, energy
It is enough in time to abandon the data after expired Base-Band Processing, it is not necessary to front-end processing to be carried out to it again, to ensure what is sent
Requirement of real-time.
Step 305, when overtime congestion occurs, overtime degree of Congestion is estimated, and abandon the stale data without Base-Band Processing.
The situation of buffering area no data occurs, is typically due in Base-Band Processing there occurs overtime congestion, congestion can cause to count
According to the stagnation of processing.If dead time is long, make the output of buffering area no data so as to send empty data, even if the number of congestion
Finished according to subsequent treatment into buffering area, also because miss fixed transmission time interval, as stale data without again
Output (situation that data are abandoned i.e. in abovementioned steps 303).In addition, if congestion time is long, part may be caused to be introduced into
The data of Base-Band Processing also turn into stale data, and the partial data can need not carry out Base-Band Processing and directly abandon, otherwise can cause
All the time larger time delay be present in follow-up data.Specific processing is as follows：
First after the generation of overtime congestion, overtime degree of Congestion is estimated.When forward end sends empty data, it would know that and occurred
Overtime congestion.Overtime degree of Congestion is estimated after overtime congestion terminates.Overtime degree of Congestion is used to weigh Base-Band Processing data
The data volume of congestion or time, when can be continued to output by the data that Base-Band Processing after overtime congestion finishes, export in sequence number table
The difference O of the equivalent process sequence number of data of the maximum with base band will be enteredM+ δ-Ke are represented.Wherein, Ke represents to enter
Enter the equivalent process output sequence number of the data of base band, OMThe maximum in output sequence number table is represented, δ is empirical value, with reference to base band
Processing time and forward end send the time interval setting of data, usually natural number, to ensure OMData are entered corresponding to+δ+1
It can be sent on time after entering Base-Band Processing.
Then judge the data without Base-Band Processing whether because congestion is out of date according to overtime degree of Congestion.If time-out is gathered around
Plug degree is more than or equal to 0, it is determined that accordingly the data without Base-Band Processing are out of date, the data without Base-Band Processing of discarding for etc.
Effect processing output serial number Ke to OMData corresponding to+δ.
An example for judging the stale data process without Base-Band Processing is given below.Fig. 8 is to judge without at base band
The stale data example of reason.Because Base-Band Processing process is there occurs overtime congestion, cause the data finished just through Base-Band Processing
Processing output sequence number 4 is assigned to, the data of equivalent process output serial number 7 will enter baseband processing unit, and reality has been pressed
The fixed transmission time sends 4 to 8 numbers to front end with empty data mode, and now overtime degree of Congestion is 8-7=1, is more than
0, judge that 7, the 8 number blocks for being introduced into Base-Band Processing are expired.With reference to Base-Band Processing time and transmission time interval, if setting
Determine δ=1, then abandon 7-9 numbers, No. 10 and later data is sent in real time to front end through Base-Band Processing to meet
Ask.
So far, the process flow in Fig. 3 terminates.On the one hand it is to the data after Base-Band Processing in above-mentioned flow
By comparing and judging, it is determined whether abandon；On the other hand by the judgement before Base-Band Processing to data, as early as possible to missing hair
Send the data of time directly to abandon, no longer carry out Base-Band Processing.Above-mentioned both sides processing be combined with each other, to meet transmitting terminal pair
In the requirement of real-time, and more save the process resource of base band resource pool.In fact, for most basic realization side
Formula, step 302 and 305 processing can not be included, also disclosure satisfy that it is some under the conditions of requirement of real-time；It is, of course, preferable to
Be achieved in that the whole handling process including step 302 and 305 Fig. 3, so as to meet it is various in the case of to real-time
Requirement, and save process resource.
In addition, in above-mentioned flow, can be carried out independently of each other for the read operation and write operation for exporting buffering area,
It is likely to occur on processing time mutually interspersed.
By the flow shown in above-mentioned Fig. 3, handled for the overtime congestion of Base-Band Processing outlet, the number complete to Base-Band Processing
Determine whether to write buffering area according to output sequence number table is combined, and data or filling are read from buffering area by fixed transmission time interval
Empty data are sent, record output sequence number, are carried out discard processing to the data not exported in time, can be saved process resource, avoid
Congestion produces the delay that data are sent, to ensure the requirement of real-time of transmitting terminal.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements done etc., should be included within the scope of protection of the invention with principle.
Claims (1)
- A kind of 1. down channel data processing method in base band resource pool, it is characterised in that including：Outlet buffering area is set in Base-Band Processing exit in advance a,；B, sequence number is exported for the data distribution equivalent process before Base-Band Processing, the input data of the serial number Base-Band Processing carries out base The serial number of corresponding data block when being exported after tape handling；C, the outlet buffering area is sent into the data selection after Base-Band Processing；According to time interval set in advance, from described Export buffering area and take out data progress front-end processing, the data for the progress front-end processing that will be read from the outlet buffering area are entered Row serial number simultaneously records；Wherein, when no data in the outlet buffering area, empty data is read and the empty data are continued to number and recorded；Data selection after Base-Band Processing is sent into the mode of the outlet buffering area to be included：If the processing output sequence number of the data Less than or equal to the maximum numbering of the data of the progress front-end processing of current record, then the data are abandoned, be not sent into it is described go out Mouth buffering area；Otherwise, the data are sent into outlet buffering area；Serial number when the processing output serial number of data after the Base-Band Processing data block exports after Base-Band Processing；After overtime congestion occurs for down channel and terminates, overtime degree of Congestion O is estimatedM+δ-Ke, when overtime degree of Congestion is more than or waits When 0, equivalent process is exported into serial number KeTo OM+ δ data abandon, and no longer carry out Base-Band Processing；Wherein, OMFor the maximum numbering of the data of the progress front-end processing of current record, KeFor the data of Base-Band Processing will be carried out Equivalent process output sequence number, δ is natural number set in advance.
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| CN101431770A (en) * | 2008-12-04 | 2009-05-13 | 上海交通大学 | Control method used for base station congestion of radio communication system up link |
| EP2624652A1 (en) * | 2010-09-29 | 2013-08-07 | Sharp Kabushiki Kaisha | Mobile communication system, mobile-station device, base-station device, communication method, and integrated circuit |
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| CN101146102A (en) * | 2007-10-16 | 2008-03-19 | 深圳国人通信有限公司 | HDLC data uplink and downlink method and communication device in RRU network |
| CN101207570A (en) * | 2007-11-26 | 2008-06-25 | 上海华为技术有限公司 | Data transmission method, data sending rate control method and base station |
| CN101431770A (en) * | 2008-12-04 | 2009-05-13 | 上海交通大学 | Control method used for base station congestion of radio communication system up link |
| EP2624652A1 (en) * | 2010-09-29 | 2013-08-07 | Sharp Kabushiki Kaisha | Mobile communication system, mobile-station device, base-station device, communication method, and integrated circuit |
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