CN103906113B - Judge the method for the empty inspection uplink scheduling control information of user terminal - Google Patents
Judge the method for the empty inspection uplink scheduling control information of user terminal Download PDFInfo
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- CN103906113B CN103906113B CN201210586894.8A CN201210586894A CN103906113B CN 103906113 B CN103906113 B CN 103906113B CN 201210586894 A CN201210586894 A CN 201210586894A CN 103906113 B CN103906113 B CN 103906113B
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Abstract
The present invention relates to the data transfer in LTE system, especially provides a kind of method for judging the empty inspection uplink scheduling control information of user terminal, and it is effectively reduced negatively affects caused by empty inspection uplink scheduling control information.This method includes the signal on user terminal parsing PHICH channels, judges whether to need to transmit data again according to analysis result；Increase following steps while PHICH channel signals are parsed：A. judge whether to detect the signal that HARQ indicates channel, if it is not received by the signal of HARQ instruction channels, then output represents the decoding of the empty inspection of user terminal, perform step B, if receive the signal of described HARQ instruction channels, then continue to parse PHICH channels, judge whether user terminal will transmit data again；B. harq buffer device is emptied, user terminal terminates data transfer.
Description
Technical field
The present invention relates to the data transfer in LTE system, more particularly to judges the whether empty inspection uplink scheduling control of user terminal
The method of information processed.
Background technology
In LTE system, uplink scheduling is controlled by network side.Network side is in control channel to the UE specified
（User terminal）Transmitting and scheduling control information.UE must be after the schedule information of network allocation be received, could be in specified time-frequency
Data are sent in resource.
In LTE system, uplink employs synchronous HARQ（Hybrid automatic repeat-request）Mechanism.Network side passes to UE
Defeated scheduling control information, scheduling UE carry out PUSCH in subframe n（Physical Uplink Shared Channel）After transmission, inherently in n+kphihch
The PHICH of subframe（Physical HARQ Indicator Channel）Upper transmission HI information（HARQ indicates the signal of channel）, feed back this time up
Whether transmission is by network side decoding success.kphihchValue pre-defined in 3GPP 36.213 agreements.
Fig. 1 is the coded modulation process of PHICH channels.HI information can pass through 3 times of repeated encodings in network side transmitting terminal, i.e.,
1bit raw informations are repeated 3 times coding.Afterwards, for coding information with BPSK modulation system, modulation turns into 3symb plural number symbols
Number.Each symbol is finally multiplied by scrambler sequence, so as to complete the coded modulation mistake of PHICH channels multiplied by with an orthogonal sequence
Journey.
Because PHICH channels can be multiplied by an orthogonal sequence in modulation, therefore multiple HI information can be by being multiplied by phase
Mutually orthogonal different sequences, so as to be carried on same running time-frequency resource.The multiple PHICH being so carried on same running time-frequency resource
Signal is referred to as a PHICH group.So a PHICH resource can be indexed by two indices,Wherein,Indicate that HI information is fed back in which PHICH group,Which orthogonal sequence used when indicating modulation /demodulation.
Fig. 2 is the flow that existing UE uploads data, step 201, when UE detects scheduling control information, then configures PUSCH
Send data to network side；Step 202, UE can parse PHICH channels in specified subframe and obtain HI information, and UE is according to receiving
ACK or NACK judges whether to need to reconfigure PUSCH transmission data.
The probability of empty inspection in any one communication system be present.In LTE system, in network side not really to UE
In the case of transmitting and scheduling control information, UE is also possible to empty inspection and arrives scheduling control information, and UE can be really not authorized
Running time-frequency resource on configuration PUSCH carry out data transmission, and network side also will not corresponding sub-frame transmission feed back HI information, then
It is NACK that UE parses the feedback information obtained after PHICH channels in specified subframe, then UE will configure PUSCH and carry out weight
Pass, i.e., data are transmitted again on no authorized running time-frequency resource, however, these running time-frequency resources may be by network side
It is scheduled to other UE in lower cell to use, such UE empty inspection is possible to that the interference to other UE can be caused.If according to existing
Implementation process, this mistake will continue as far as UE and send data to maximum retransmission, and so be likely to disturb always
Reception of the network side to other UE upstream datas in same cell.
The content of the invention
It is an object of the invention to provide a kind of method for judging the empty inspection uplink scheduling control information of user terminal, its is effective
Reduce and negatively affected caused by empty inspection uplink scheduling control information.
In order to solve the above technical problems, embodiments of the present invention, which provide one kind, judges the empty inspection uplink scheduling of user terminal
The method of control information, this method include the signal on user terminal parsing PHICH channels, judge whether need according to analysis result
Again data to be transmitted；Increase following steps while PHICH channel signals are parsed：
A. judge whether to detect that HARQ indicates the signal of channel, if being not received by the signal of HARQ instruction channels,
Then output represents the decoding of the empty inspection of user terminal, performs step B, if receiving the signal of described HARQ instruction channels,
Continue to parse PHICH channels, judge whether user terminal will transmit data again；
B. harq buffer device is emptied, user terminal terminates data transfer.
As a further improvement on the present invention, in the step A, by the relative work(for detecting PHICH channel signals
Rate come judge whether user terminal receive HARQ instruction channel signal.
As a further improvement on the present invention, the relative power be PHICH channels UE frequency expansion sequence despreading after
Soft bit general power.
As a further improvement on the present invention, soft bit general power and threshold value PDTXCompare, if result is less than threshold value PDTX,
It is DTX then to export analysis result, illustrates scheduling control information when UE void has examined initial transmission, if soft bit general power is big
In threshold value PDTX, then illustrate that network side has issued scheduling control information really, then continue to parse the signal on PHICH channels, judge
Whether user terminal will transmit data again.
Upstream data information is constantly retransmitted always in the case where void is examined present invention effectively prevents UE, constantly to cell
Interior other UE are interfered.Especially in the case of semi-persistent scheduling, due to being empty inspection, network side will not issue semi-persistent scheduling
Release, so UE can send invalid upward signal always, persistently disturb other users, and the present invention can be reduced effectively
Above-mentioned interference, due to reducing the interference to other users, the uplink data handling capacity in whole cell can also obtain
It must improve.Simultaneously as not sending data in the running time-frequency resource of with no authorized, UE can be made to reduce invalid transmission, reduce UE
Power consumption.
Brief description of the drawings
Fig. 1 is the coded modulation process of PHICH channels；
Fig. 2 is the flow that existing UE uploads data；
Fig. 3 is the flow that UE of the present invention uploads data；
Fig. 4 is the flow chart of present invention parsing PHICH channels；
Fig. 5 is PHICH channels demodulation constellation schematic diagram；
Fig. 6 is another flow chart of present invention parsing PHICH channels.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, each reality below in conjunction with accompanying drawing to the present invention
The mode of applying is explained in detail.However, it will be understood by those skilled in the art that in each embodiment of the present invention,
In order that reader more fully understands the application and proposes many ins and outs.But even if without these ins and outs and base
Many variations and modification in following embodiment, each claim of the application technical side claimed can also be realized
Case.
This patent proposes a kind of method for judging the empty inspection uplink scheduling control information of user terminal, and it passes through detection
The signal power of PHICH channels, judge the whether empty inspection ascending control informations of UE.
If network side issued uplink scheduling control information really, then network side is bound in specified subframe upload
Defeated HI information, feedback network side joint receive the situation of data.If UE, in initial transmission, void has examined the scheduling that network side issues
Control information, then network side will not go receive the data from UE, also will not give UE send HI information.Therefore UE can pass through inspection
Survey whether the ascending control information whether network side have sent HI information to detect when judging UE initial transmissions is empty inspection.
, can on same running time-frequency resource due to employing the multiplex mode of code division multiplexing for PHICH channels in network side
There can be multiple HI information with different spread spectrum sequence codings, the HI of the different spread spectrum sequence codings phase on PHICH channels
Orthogonal relation is kept between mutually, so the present invention is using to soft ratio of the PHICH channels after the frequency expansion sequence despreading specified
Special general power checks.
Referring to Fig. 3, step 201, when UE detects scheduling control information, then configuration PUSCH sends data to network side；
In step 202, UE can parse PHICH channels in specified subframe, increase during PHICH channels are parsed
The detection of soft bit general power, if soft bit general power is less than a given threshold PDTX, then then export PHICH channels
Analysis result is DTX, illustrates scheduling control information when UE void has examined initial transmission, performs step 301；If soft bit total work
Rate is not less than a given threshold PDTX, then illustrate that network side has issued HI information to UE really, then judge that soft bit general power is
It is no to be less than another given threshold b, if being NACK less than threshold value b, PHICH channel output analysis result, perform step 203；Such as
Fruit is ACK not less than threshold value b, PHICH channel output analysis result, and UE is received on ACK illustrates that network side has been successfully received
Row data, the re-transmission of UE no longer collocating uplink data.
In step 301, the Buffer of corresponding HARQ instance process is emptied（Buffer）, the re-transmission of UE no longer collocating uplink data.
In step 203, UE receives NACK, illustrates that network side does not have successfully received the upstream data that UE is sent, therefore, UE is again
Configuration PUSCH sends data again.
It is that one of present invention parsing PHICH is preferably real referring to Fig. 4, being the flow chart of present invention parsing PHICH channels
Apply example.
Step 401, after having received the signal on PHICH channels, front end symbol level processing is carried out, obtains the IQ roads of 12 symbols
Data；
Step 402, every 4 symbols carry out related calculation with the frequency expansion sequence corresponding to UE, are de-spread, obtain 3 symbolic solutions
Expand sequence；
Step 403, linear transformation is carried out to the IQ circuit-switched datas after despreading, obtains the component h on H directions, referring to Fig. 5,
In planisphere, the component h obtained on H directions is exactly to have done linear transformation, if IQ circuit-switched datas are respectively i, q, then
Step 404, the amplitude limit of [- 1,1] is done to component h, obtains demodulation result soft bit s；
Step 405,3 demodulation soft bits are obtained by 3 symbols despreading sequence, the knot after being added to this 3 demodulation soft bits
Fruit takes absolute value, and obtains soft bit general power；
Step 406, soft bit general power and threshold value PDTXCompare, if result is less than threshold value PDTX, then analysis result is exported
For DTX, illustrate scheduling control information when UE void has examined initial transmission, if soft bit general power is more than threshold value PDTX, then say
Bright network side has issued scheduling control information really, performs step 407；
Step 407, judge that soft bit general power is less than another given threshold b, if it is judged that being yes, then output decoding
As a result ACK, if it is judged that being no, then output decoding result is NACK.
In step 401, if what is obtained is the IQ circuit-switched datas of 6 symbols；Then in step 402, every 2 symbols and UE institutes
Corresponding frequency expansion sequence carries out related calculation, and is de-spread, and obtains 3 symbols despreading sequence, and other steps are constant.
Referring to Fig. 6, be the flow chart of present invention parsing PHICH channels, be present invention parsing PHICH another is preferable
Embodiment.
Step 401 to step 404 in step 601 to step 604 and Fig. 4 is the same, in secondary no longer Ao Shu.
Step 605,3 demodulation soft bits are obtained by 3 symbol I/Q datas, absolute value addition is done to 3 demodulation soft bits；
Step 606, if 3 demodulation soft bit absolute value addition results are less than threshold value P 'DTX, then HI decoding results are exported
For DTX；If result is not less than threshold value p 'DTX, then step 607 is performed；
Step 607,3 demodulation soft bits are directly added；
Step 608,3 demodulation direct addition results of soft bit, if result is less than threshold value b, export compared with threshold value b
NACK；If soft bit addition result is not less than threshold value PNACK, then it is ACK to export HI decoding results.
Upstream data information is constantly retransmitted always in the case where void is examined present invention effectively prevents UE, constantly to cell
Interior other UE are interfered.Due to reducing the interference to other users, the uplink data handling capacity in whole cell
It can be improved.Simultaneously as not sending data in the running time-frequency resource of with no authorized, UE can be made to reduce invalid transmission,
Reduce UE power consumption.
In present pre-ferred embodiments, PDTXAnd P 'DTXIt is to be emulated by communication link algorithm model, and refers to agreement
It is required that empty inspection determine with false dismissal probability.Such as a kind of simple method is exactly to build one simply with emulation tool
Traffic model, such as Gauss strong noise channel model, one group of experiment is carried out, from one group of threshold value, is tested under a certain threshold value, terminal
The empty inspection in side or false dismissal probability；Then according to protocol requirement and the empty inspection false dismissal probability suggested, suitable threshold value is selected.
It will be understood by those skilled in the art that the respective embodiments described above are to realize the specific embodiment of the present invention,
And in actual applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (8)
1. a kind of method for judging the empty inspection uplink scheduling control information of user terminal, this method includes user terminal parsing PHICH
Signal on channel, judge whether to need to transmit data again according to analysis result；Characterized in that, in parsing PHICH channels
Increase following steps while upper signal：
A. judge whether to detect that HARQ indicates the signal of channel, it is defeated if being not received by the signal of HARQ instruction channels
Go out to represent the decoding of the empty inspection of user terminal, perform step B, if receiving the signal of described HARQ instruction channels, continue
PHICH channels are parsed, judge whether user terminal will transmit data again；
B. harq buffer device is emptied, user terminal terminates data transfer.
2. according to the method for claim 1, it is characterised in that in the step A, believed by detecting on PHICH channels
Number relative power come judge whether user terminal receive HARQ instruction channel signal.
3. according to the method for claim 2, it is characterised in that the relative power is PHICH channels UE spread spectrum sequence
Soft bit general power after row despreading.
4. according to the method for claim 3, it is characterised in that soft bit general power and threshold value PDTXCompare, if result is small
In threshold value PDTX, then it is DTX to export analysis result, illustrates scheduling control information when UE void has examined initial transmission, if, soft ratio
Special general power is more than threshold value PDTX, then illustrate that network side has issued scheduling control information really, then continue to parse on PHICH channels
Signal, judge whether user terminal will transmit data again.
5. according to the method for claim 2, it is characterised in that the method for detection measurement PHICH channel signal relative powers
Comprise the following steps：
Step 401, front end symbol level processing is carried out to the signal on PHICH channels, obtains IQ circuit-switched datas；
Step 402, IQ circuit-switched datas carry out related calculation with the frequency expansion sequence corresponding to user terminal, are de-spread, and obtain 3 symbolic solutions
Expand sequence；
Step 403, linear transformation is carried out to despreading sequence, obtains the component h on H directions；
Step 404, the amplitude limit of [- 1,1] is done to component h, obtains demodulation result soft bit s；
Step 405,3 demodulation soft bits are obtained by 3 symbols despreading sequence, the result after being added to this 3 demodulation soft bits takes
Absolute value, obtain soft bit general power；
Step 406, soft bit general power and threshold value PDTXCompare, if result is less than threshold value PDTX, then exporting analysis result is
DTX, illustrate scheduling control information when user terminal void has examined initial transmission, if soft bit general power is not less than threshold value
PDTX, then illustrate that network side has issued scheduling control information really.
6. according to the method for claim 2, it is characterised in that the method for detection measurement PHICH channel signal relative powers
Comprise the following steps：
Step 601, front end symbol level processing is carried out to the signal on PHICH channels, obtains IQ circuit-switched datas；
Step 602, IQ circuit-switched datas carry out related calculation with the frequency expansion sequence corresponding to user terminal, are de-spread, and obtain 3 symbolic solutions
Expand sequence；
Step 603, linear transformation is carried out to despreading sequence, obtains the component h on H directions；
Step 604, the amplitude limit of [- 1,1] is done to component h, obtains demodulation result soft bit s；
Step 605,3 demodulation soft bits are obtained by 3 symbol I/Q datas, the absolute value of 3 demodulation soft bits is added；
Step 606, if 3 demodulation soft bit absolute value addition results are less than threshold value P 'DTX, then exporting HI decodings result is
DTX, illustrate scheduling control information when user terminal void has examined initial transmission, if soft bit general power is not less than threshold value
P′DTX, then illustrate that network side has issued scheduling control information really.
7. the method according to claim 5 or 6, it is characterised in that if carrying out front end symbol to the signal on PHICH channels
The processing of number level, obtains 12 symbol IQ circuit-switched datas, then every 4 IQ circuit-switched datas do related fortune to the frequency expansion sequence corresponding to user terminal
Calculate.
8. the method according to claim 5 or 6, it is characterised in that if carrying out front end symbol to the signal on PHICH channels
The processing of number level, obtains 6 symbol IQ circuit-switched datas, then every 2 IQ circuit-switched datas do related fortune to the frequency expansion sequence corresponding to user terminal
Calculate.
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| CN106130700B (en) * | 2016-08-09 | 2020-02-28 | 北京松果电子有限公司 | Method and device for detecting physical hybrid automatic repeat request (HARQ) indication and user equipment |
| CN108259400B (en) * | 2017-12-22 | 2021-05-18 | 北京小米松果电子有限公司 | Soft bit processing method, device and storage medium |
| CN111432371A (en) * | 2019-01-09 | 2020-07-17 | 华为技术有限公司 | Communication method and device |
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| WO2011122495A1 (en) * | 2010-03-30 | 2011-10-06 | シャープ株式会社 | Wireless communication method, mobile station device, wireless communication system, and integrated circuit |
| CN102238624A (en) * | 2010-04-30 | 2011-11-09 | 北京三星通信技术研究有限公司 | Method for obtaining uplink data receiving condition |
| CN102447550A (en) * | 2010-09-30 | 2012-05-09 | 上海贝尔股份有限公司 | Method and device for processing mixed automatic retransmitting request |
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| CN101505212A (en) * | 2008-02-04 | 2009-08-12 | 上海贝尔阿尔卡特股份有限公司 | Method for operating HARQ buffer |
| WO2011122495A1 (en) * | 2010-03-30 | 2011-10-06 | シャープ株式会社 | Wireless communication method, mobile station device, wireless communication system, and integrated circuit |
| CN102238624A (en) * | 2010-04-30 | 2011-11-09 | 北京三星通信技术研究有限公司 | Method for obtaining uplink data receiving condition |
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