CN106302287B - Data communications method - Google Patents
Data communications method Download PDFInfo
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- CN106302287B CN106302287B CN201510289209.9A CN201510289209A CN106302287B CN 106302287 B CN106302287 B CN 106302287B CN 201510289209 A CN201510289209 A CN 201510289209A CN 106302287 B CN106302287 B CN 106302287B
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000004891 communication Methods 0.000 title claims abstract description 24
- 238000012545 processing Methods 0.000 claims abstract description 52
- 239000000284 extract Substances 0.000 claims abstract description 8
- 238000000605 extraction Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000004821 distillation Methods 0.000 abstract description 4
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2656—Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
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Abstract
The present invention relates to a kind of data communications methods, which comprises sender's sequence judges whether each data field flag bit is sky, records the index mark that first data distinctive emblem position is empty data field；It is identified according to the index, sending the data field flag bit for OFDM symbol data is empty data field；Recipient extracts the OFDM symbol data, and receives the control format instruction CFI of next subframe of base station transmission；When the CFI is effective, judge whether the serial number of the smallest OFDM symbol data is less than the CFI, if it is, extracting the smallest OFDM symbol data of serial number.Data communications method provided by the present application, by detecting bit-level processing unit and PCFICH the and PDCCH symbol of the lower subframe of advantage distillation is handled, to meet the minimum requirement of next subframe PDSCH Channel Processing time delay.It can also making symbol level processing unit detect cavity existing for data communication area and being intended to the data write-in cavity of transmitting.
Description
Technical field
This application involves field of communication technology more particularly to a kind of data communications methods.
Background technique
Long term evolution (Long Term Evolution, LTE) system is due to broader bandwidth, the features such as data throughout is big,
Need terminal baseband chip have stronger processing capacity and communication ability, therefore terminal baseband chip can all use it is multiple
The mode that processing unit works at the same time carries out the parallel processing of continuous-flow type to uplink downlink.In addition, LTE system has height real
The requirement of when property has stringent limitation to the processing delay of uplink downlink, therefore terminal baseband chip is in physical layer scheduling side
Face needs to consider to reduce processing delay as far as possible, guarantees the requirement of system real time.
Strict demand based on above-mentioned LTE terminal to processing capacity and processing delay, for downlink, symbol level processing
It is often worked using two different processing unit for parallel with bit-level processing, it is real using certain data structure between processing unit
The communication of existing data.Due to Physical Downlink Shared Channel (Physical Downlink Shared channel, PDSCH), object
It manages under control format instruction channel (Physical Control Format Indicator channel, PCFICH) and physics
The relation of interdependence of row control channel (Physical Downlink Control channel, PDCCH), if base band is adopted
It is handled with the successive order of arrival for data of eating dishes without rice or wine, inevitably results in symbol level processing unit due to temporarily there is no control
Format indicates (Control Format Indicator, CFI) and Downlink Control Information (Downlink Control
Information, DCI) and be waited for, waste processor resource and increase processing delay.Therefore, Base-Band Processing needs
The mechanism seized is provided, the PDSCH Channel Processing of current subframe, PCFICH and the PDCCH letter of the lower subframe of priority processing are suspended
Road guarantees that the processing delay of next subframe is minimum.Due to the application of preemption mechanism, symbol level processing unit can priority processing
Constellation data is passed to bit-level processing unit, constellation data pair by shared memory by PCFICH and PDCCH channel
Orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, the OFDM) symbol and subframe numbers answered
It may be random ordering, for the data of this random ordering, bit-level processing unit still needs excellent according to the above-mentioned priority seized
The corresponding OFDM symbol planisphere of PCFICH and PDCCH for first extracting next subframe completes corresponding bit-level processing, under
The PDSCH channel symbol grade processing of one subframe provides CFI and DCI information.
In the prior art, the data communication between symbol level and bit-level processing unit often uses first in first out (first
In first out, FIFO) data structure, bit-level processing unit can only be according to number of the symbol level processing unit into FIFO
OFDM symbol is handled one by one according to write sequence, since the time delay of bit-level processing exists, in symbol level processing to next subframe
It may still remain what the processing of current subframe bit-level was not read when the write-in of PCFICH and PDCCH symbol is completed in FIFO
PDSCH symbol, but bit-level processing unit can only have been handled first under could handling after the PDSCH symbol of the current subframe being first written
PCFICH the and PDCCH symbol of one subframe, PCFICH the and PDCCH channel symbol that cannot achieve the lower subframe of advantage distillation carry out
Processing, it cannot be guaranteed that the minimum of next subframe PDSCH Channel Processing time delay.
Summary of the invention
The purpose of the application is to provide a kind of data communications method, by detecting bit-level processing unit and preferentially mentioning
PCFICH the and PDCCH symbol for removing a subframe is handled, to meet next subframe PDSCH Channel Processing time delay most
Smallization requirement.
To achieve the goals above, this application provides a kind of data communications methods, which comprises
Sender's sequence judges whether each data field flag bit is sky, and recording first data distinctive emblem position is empty number
It is identified according to the index in area；
It is identified according to the index, sending the data field flag bit for OFDM symbol data is empty data field；
Recipient extracts the OFDM symbol data, and receives the control format instruction CFI of next subframe of base station transmission；
When the CFI is effective, judge whether the serial number of the smallest OFDM symbol data is less than the CFI, if it is,
Extract the smallest OFDM symbol data of serial number.
Optionally, the method also includes:
When the CFI is invalid, the smallest OFDM symbol data of serial number are extracted, and by the OFDM symbol data extracted
Data field flag bit empties.
Optionally, the method also includes:
When the CFI is effective and the serial number of the smallest OFDM symbol is more than or equal to the CFI, the son of OFDM symbol is judged
Whether frame number is identical, if it is not, then extracting the smallest OFDM symbol data of serial number of current subframe, and the OFDM extracted is accorded with
The data field flag bit of number empties.
Optionally, the method also includes:
When the CFI is effective and the serial number of the smallest OFDM symbol is more than or equal to the CFI, the son of OFDM symbol is judged
Whether frame number is identical, if it is, extracting the smallest OFDM symbol data of serial number, and by the number of the OFDM symbol data extracted
It is emptied according to distinctive emblem position.
Optionally, it is identified in described sender according to the index, sends the data field for OFDM symbol data and mark
After empty data field is in will position, the method also includes: the data distinctive emblem for being stored with OFDM symbol data is set to full.
Optionally, after the smallest OFDM symbol data of extraction serial number, the method also includes: by what is extracted
The data field flag bit of OFDM symbol data empties.
Data communications method provided by the present application, by detecting bit-level processing unit and the lower subframe of advantage distillation
PCFICH and PDCCH symbol handled, thus meet next subframe PDSCH Channel Processing time delay minimum requirement.
It can also making symbol level processing unit detect cavity existing for data communication area and being intended to the data write-in cavity of transmitting.
Detailed description of the invention
Fig. 1 is the data communications method flow chart that the embodiment of the present application one provides；
Fig. 2 is the data communication plot structure body schematic diagram that the embodiment of the present application one provides.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall in the protection scope of this application.
When the technical solution of the application is applied to down link data processing, symbol level processing unit and bit-level processing are single
Data communication is carried out between member, in data communication area, it is understood that there may be following scene:
1. existing simultaneously the PCFICH of next subframe and the PDSCH symbol of current subframe；
2. existing simultaneously the PDCCH of next frame and the PDSCH symbol of current subframe；
3. existing simultaneously the PDSCH symbol of current subframe and the PDSCH symbol of next subframe；
4. only existing the PDSCH symbol of same subframe；
Also, storage sequence of the above OFDM symbol in data communication area may be out-of-order without rule.
Fig. 1 is the data communications method flow chart that the embodiment of the present application one provides.As shown in Figure 1, the method is specifically wrapped
It includes:
Step 101, sender's sequence judges whether each data field flag bit is sky, records first data distinctive emblem position
For the index mark of empty data field.
Specifically, Fig. 2 is data communication plot structure body schematic diagram, as shown in Fig. 2, data field includes: data field 1, data
Area 2 ... data field n, wherein n is natural number.The corresponding flag bit in each data field: 1 flag bit of data field, data field 2 are marked
Will position ... data field n flag position.Each data field flag bit indicates that corresponding data field is empty or is completely, if data distinctive emblem
Position is sky, then data can be written to corresponding data field in sender.Whether sender's needs sequence judges data field flag bit
For sky, by index mark that first data distinctive emblem position is empty data field, (1,2 ... n) is recorded, and is convenient for subsequent transmission
Data.
Step 102, it is identified according to the index, sending the data field flag bit for OFDM symbol data is empty number
According to area.
Specifically, transmitting terminal is identified according to the index that the data field flag bit recorded in step 101 is empty data field, will
It is that empty index identifies corresponding data field that OFDM symbol data, which are sent to data field flag bit,.
Optionally, it is identified in sender according to the index, sends data field flag bit for OFDM symbol data as sky
Data field after, the method also includes: the data distinctive emblem for being stored with OFDM symbol data is set to full.
Step 103, recipient extracts the OFDM symbol data, and receives the control format of next subframe of base station transmission
Indicate CFI.
Specifically, recipient extracts the OFDM symbol data that sender is sent to data field according to data field flag bit, right
OFDM symbol data are ranked up according to the ascending sequence of serial number, and receive next subframe that base station is sent by PCFICH
CFI.
Step 104, when the CFI is effective, judge whether the serial number of the smallest OFDM symbol data is less than the CFI,
If it is, extracting the smallest OFDM symbol data of serial number.
Specifically, whether the CFI that recipient's judgement receives is zero, if be not zero, CFI is effective, then judges minimum
The serial number of OFDM symbol whether be less than CFI, if it is, extracting the smallest OFDM symbol data of serial number.
It should be noted that serial number is most when the CFI is effective and the serial number of the smallest OFDM symbol data is less than CFI
Small OFDM symbol data are the PDCCH data of next subframe.
Optionally, after the smallest OFDM symbol data of extraction serial number, the method also includes: by what is extracted
The data field flag bit of OFDM symbol data empties.
It should be noted that the purpose that the data field flag bit of the OFDM symbol data extracted empties is easy for the number
Continue to be multiplexed according to area.
Optionally, the method also includes: when CFI is invalid, extract the smallest OFDM symbol data of serial number, and will extract
The data field flag bit of OFDM symbol data out empties.
It should be noted that extracting the PDSCH that the smallest OFDM symbol data of serial number are current subframe when CFI is invalid
Or the PCFICH data of next subframe.
Optionally, the method also includes:
When the CFI is effective and the serial number of the smallest OFDM symbol is more than or equal to the CFI, the son of OFDM symbol is judged
Whether frame number is identical, if it is not, then extracting the smallest OFDM symbol data of serial number of current subframe, and the OFDM extracted is accorded with
The data field flag bit of number empties.
It should be noted that when CFI is effective and the serial number of the smallest OFDM symbol is more than or equal to CFI, meanwhile, OFDM symbol
Subframe numbers it is different, then the smallest OFDM symbol data of serial number for extracting current subframe are the PDSCH data of current subframe.
Optionally, the method also includes:
When the CFI is effective and the serial number of the smallest OFDM symbol is more than or equal to the CFI, the son of OFDM symbol is judged
Whether frame number is identical, if it is, extracting the smallest OFDM symbol data of serial number, and by the number of the OFDM symbol data extracted
It is emptied according to distinctive emblem position.
It should be noted that when CFI is effective and the serial number of the smallest OFDM symbol is more than or equal to CFI, meanwhile, OFDM symbol
Subframe numbers it is identical, then the smallest OFDM symbol data of the serial number extracted be same subframe PDSCH data.
Wherein, OFDM symbol data include corresponding subframe numbers and serial number.Subframe numbers be current subframe subframe numbers or under
The subframe numbers of one subframe.The serial number 0,1,2 ... 13 of OFDM symbol.
It should be noted that the sender in the present embodiment is the symbol level processing unit of terminal side, recipient is terminal
The bit-level processing unit of side.Symbol level processing mainly carries out FFT to the received base band original signal of terminal, solution resource block reflects
It penetrates, channel estimation, equilibrium, the mapping of solution layer, demodulation；Bit-level processing is then to descramble the data after demodulation, solve rate
Match, channel decoding and CRC check.
Data communications method provided by the present application, by detecting bit-level processing unit and the lower subframe of advantage distillation
PCFICH and PDCCH symbol handled, thus meet next subframe PDSCH Channel Processing time delay minimum requirement.
It can also making symbol level processing unit detect cavity existing for data communication area and being intended to the data write-in cavity of transmitting.
Professional should further appreciate that, described in conjunction with the examples disclosed in the embodiments of the present disclosure
Object and algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, hard in order to clearly demonstrate
The interchangeability of part and software generally describes each exemplary composition and step according to function in the above description.
These functions are implemented in hardware or software actually, the specific application and design constraint depending on technical solution.
Professional technician can use different methods to achieve the described function each specific application, but this realization
It is not considered that exceeding scope of the present application.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can be executed with hardware, processor
The combination of software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only memory
(ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field
In any other form of storage medium well known to interior.
Above-described specific embodiment has carried out further the purpose of the application, technical scheme and beneficial effects
It is described in detail, it should be understood that being not used to limit the application the foregoing is merely the specific embodiment of the application
Protection scope, within the spirit and principles of this application, any modification, equivalent substitution, improvement and etc. done should all include
Within the scope of protection of this application.
Claims (6)
1. a kind of data communications method, which is characterized in that the described method includes:
Sender be terminal side symbol level processing unit, described sender sequence judge each data field flag bit whether be
Sky records the index mark that first data distinctive emblem position is empty data field；
It is identified according to the index, sending the data field flag bit for OFDM symbol data is empty data field；
Recipient is the bit-level processing unit of terminal side, and the recipient extracts the OFDM symbol data, and receives base station
The control format of the next subframe sent indicates CFI；
When the CFI is not zero, then the CFI is effective, it is described to judge whether the serial number of the smallest OFDM symbol data is less than
CFI, if it is, extracting the smallest OFDM symbol data of serial number.
2. the method according to claim 1, wherein the method also includes:
When the CFI is invalid, the smallest OFDM symbol data of serial number are extracted, and by the data of the OFDM symbol data extracted
Distinctive emblem position empties.
3. the method according to claim 1, wherein the method also includes:
When the CFI is effective and the serial number of the smallest OFDM symbol is more than or equal to the CFI, the subframe numbers of OFDM symbol are judged
It is whether identical, if it is not, then extracting the smallest OFDM symbol data of serial number of current subframe, and the OFDM symbol number that will be extracted
According to data field flag bit empty.
4. according to the method described in claim 3, it is characterized in that, the method also includes:
When the CFI is effective and the serial number of the smallest OFDM symbol is more than or equal to the CFI, the subframe numbers of OFDM symbol are judged
It is whether identical, if it is, extracting the smallest OFDM symbol data of serial number, and by the data field of the OFDM symbol data extracted
Flag bit empties.
5. the method according to claim 1, wherein being identified in described sender according to the index, by OFDM
Symbol data is sent to after the data field that the data field flag bit is sky, the method also includes: OFDM symbol will be stored with
The data distinctive emblem of number is set to full.
6. the method according to claim 1, wherein the smallest OFDM symbol data of extraction serial number it
Afterwards, the method also includes: the data field flag bit of the OFDM symbol data extracted is emptied.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510289209.9A CN106302287B (en) | 2015-05-29 | 2015-05-29 | Data communications method |
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| CN201510289209.9A CN106302287B (en) | 2015-05-29 | 2015-05-29 | Data communications method |
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| CN106302287A CN106302287A (en) | 2017-01-04 |
| CN106302287B true CN106302287B (en) | 2019-07-16 |
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| CN102781095A (en) * | 2011-05-09 | 2012-11-14 | 华为技术有限公司 | Method, base station, user equipment and system for data transmission |
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| WO2014017866A1 (en) * | 2012-07-26 | 2014-01-30 | 엘지전자 주식회사 | Method and user device for receiving downlink signal, and method and base station for transmitting downlink signal |
-
2015
- 2015-05-29 CN CN201510289209.9A patent/CN106302287B/en not_active Expired - Fee Related
Patent Citations (5)
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| KR20120051706A (en) * | 2009-08-23 | 2012-05-22 | 엘지전자 주식회사 | Transmission method of downlink signal in wireless communication system and transmission apparatus therefor |
| WO2011128013A1 (en) * | 2010-04-13 | 2011-10-20 | Panasonic Corporation | Mapping of control information to control channel elements |
| CN102781095A (en) * | 2011-05-09 | 2012-11-14 | 华为技术有限公司 | Method, base station, user equipment and system for data transmission |
| WO2014017866A1 (en) * | 2012-07-26 | 2014-01-30 | 엘지전자 주식회사 | Method and user device for receiving downlink signal, and method and base station for transmitting downlink signal |
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