CN103973418A - Transmission method and device based on communication channel activation detection - Google Patents
Transmission method and device based on communication channel activation detection Download PDFInfo
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- CN103973418A CN103973418A CN201310033187.0A CN201310033187A CN103973418A CN 103973418 A CN103973418 A CN 103973418A CN 201310033187 A CN201310033187 A CN 201310033187A CN 103973418 A CN103973418 A CN 103973418A
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- base station
- terminal
- business datum
- schedule information
- harq
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
Abstract
The invention discloses a transmission method and device based on communication channel activation detection and relates to the field of communication. The method includes the steps that a base station issues scheduling information containing scheduling resource indication to a terminal, wherein the scheduling information is used for enabling the terminal to send service data; the base station receives the service data uploaded by the terminal; the base station checks the service data; when the base station checks that the service data are wrong, the base station judges whether the terminal loses the scheduling information according to the service data; the base station conducts judgment processing and HARQ processing in an HARQ mode according to the judgment result so as to control the terminal to conduct HARQ according to a processing result. The transmission method and device based on communication channel activation detection can reduce the LTE uplink packet error rate and effectively increase the resource utilization rate of a PDCCH.
Description
Technical field
The present invention relates to the communications field, particularly up mixed automatic retransfer HARQ treatment technology in Long Term Evolution LTE system.
Background technology
In LTE system, in order to improve the systematic function covering under limitation scene, often adopt HARQ, and HARQ can specifically be divided into incremental redundancy (Incremental Redundancy, IR) adaptive model and soft merging (Chase Combining, CC) pattern and IR non-self-adapting pattern.
For CC pattern, feature is that data retransmission is identical with the grouped data sending above, only has a kind of redundancy versions, and data retransmission and storage data are carried out the laggard row decoding of soft merging by receiving terminal.
For IR pattern, new biography packet has contained whole information and is for the first time, receiving terminal cyclic redundancy check (CRC) (Cyclic Redundancy Check, CRC) after wrong, erroneous packet is stored in the register of receiving terminal, and this scheme has multiple redundancy versions, and each retransmission packet has contained identical information bit and different incremental redundancy version, receiving terminal carries out soft bit merging to the information bit retransmitting, and is carrying out decoding after new check digit is merged to code word.For base station side, under IR adaptive model, the HARQ of re-transmission redistributes frequency domain resource, therefore, and the frequency domain resource that need to use physical downlink control channel PDCCH resource again to indicate this re-transmission of UE HARQ to distribute.What it is generally acknowledged Downlink Control Information DCI0 instruction that PDCCH sends is all adaptive HARQ.And under IR non-self-adapting pattern, the frequency domain resource that the HARQ retransmitting uses is identical with the frequency domain resource that this HARQ transmitted use last time, now, this HARQ does not need to use PDCCH resource, only by physical mixed automatic re-transmission indicating channel (Physical Hybrid-ARQ Indicator Channel, PHICH) (Acknowledgement, ACK) or (Negative Acknowledgement, NACK) unconfirmed confirmed in instruction.
LTE uplink retransmission is in order to solve uplink mistake bag, if but the DCI0 that UE issues eNB authorizes loss, retransmit and also not necessarily can solve mistake bag, under IR adaptive model, RV is used to refer to the original position of passed data, if lacked the DCI0 of RV=0, physical layer cannot solution to packet.Under IR non-self-adapting pattern, if DCI0 loses, the RV version of base station side and UE side is just inconsistent, physical layer also cannot solution to packet, thereby finally cause HARQ bust this to cause packet loss.IR adaptive model is that new biography and re-transmission all need to issue DCI0 instruction, and IR non-self-adapting pattern is to only have new biography need to issue DCI0 instruction, retransmits and does not need to issue DCI0.This shows and IR non-self-adapting pattern compare IR adaptive model to have a larger advantage be exactly to save PDCCH resource.But the HARQ retransmitting under IR adaptive model redistributes frequency domain resource, and under IR non-self-adapting pattern, frequency domain resource is fixed, if the in the situation that of many UE, it is larger that limited frequency domain resource can cause under IR non-self-adapting pattern HARQ to retransmit failed probability.
The problem that base station need to solve is how can ensure reduce mistake bag as far as possible and how more reasonably to utilize PDCCH resource.
Summary of the invention
The object of the present invention is to provide a kind of transmission method and device of detecting of activating based on channel, solve the undetected DCI0 of UE existing in prior art and cause HARQ failure, and then cause the problem of packet loss.
According to an aspect of the present invention, provide a kind of transmission method detecting that activates based on channel, having comprised:
Base station issues for making terminal send the schedule information of business datum to terminal;
The business datum that base station receiving terminal is uploaded;
Verification is carried out to described business datum in base station;
In the time of check errors, base station utilizes described business datum, judges whether terminal has lost described schedule information;
Base station utilizes judged result, carries out mixed automatic retransfer HARQ mode adjudging and processes and HARQ retransmission process, so that control terminal carries out HARQ re-transmission according to result.
Preferably, base station is according to described schedule information, the business datum of uploading at predetermined running time-frequency resource receiving terminal.
Preferably, described base station judges whether terminal has been lost the step of described schedule information and comprised:
Signal power or the signal to noise ratio of described business datum calculated in base station;
When the signal to noise ratio that is less than signal power threshold value or described business datum when the signal power of described business datum is less than snr threshold, base station determines that described business datum does not adapt with described schedule information, and the described schedule information that judged lost terminal.
The step of described HARQ mode adjudging processing comprises:
In the time of the described schedule information that judged lost terminal of base station, be IR adaptive model by HARQ mode adjustment, otherwise, be IR non-self-adapting pattern by HARQ mode adjustment.
Described HARQ retransmission process step comprises:
In the time of the described schedule information that judged lost terminal of base station, keep former RV value, otherwise, upgrade RV value.
Described schedule information comprises and is used to indicate the Downlink Control Information DCI0 that the redundancy versions RV value of scheduling resource is zero.
The step that described control terminal carries out HARQ re-transmission according to result comprises:
Base station resends schedule information according to IR adaptive model to terminal, and described schedule information comprises that RV value is zero Downlink Control Information DCI0;
Terminal, according to described schedule information, is sent to base station by business datum.
Preferably, the step that described control terminal carries out HARQ re-transmission according to result comprises:
Base station sends physical mixed automatic re-transmission indicating channel PHICH indication information to terminal;
Terminal, according to described PHICH indication information, is upgraded RV value, and business datum is sent to base station.
According to a further aspect in the invention, provide a kind of transmitting device detecting that activates based on channel, comprise be arranged on base station side with lower unit:
Data transmit-receive unit, for issuing to terminal for making terminal send the schedule information of business datum, and the business datum uploaded of receiving terminal;
Data check unit, for carrying out verification to described business datum;
Activate decision unit, for when the check errors, utilize described business datum, judge whether terminal has lost described schedule information;
Mode decision unit, for utilizing judged result, carries out the processing of mixed automatic retransfer HAQR mode adjudging;
Retransmission process unit, for utilizing judged result, carries out HARQ retransmission process, so that control terminal carries out HARQ re-transmission according to result.
Preferably, described data transmit-receive unit is also for sending physical mixed automatic re-transmission indicating channel PHICH indication information or resend schedule information to terminal.
Compared with prior art, beneficial effect of the present invention is:
The present invention not only can effectively reduce mistake bag, and can effectively promote PDCCH resource utilization.
Brief description of the drawings
Fig. 1 is the transmission method flow chart that activation detects based on channel that the embodiment of the present invention provides;
Fig. 2 is the transmitting device structured flowchart that activation detects based on channel that the embodiment of the present invention provides;
Fig. 3 be described in Fig. 2 in device channel activate overhaul flow chart;
Fig. 4 is IR adaptive model and IR non-self-adapting mode adjudging flow chart in Fig. 3;
Fig. 5 is HARQ retransmission process flow chart in Fig. 3.
Embodiment
To a preferred embodiment of the present invention will be described in detail, should be appreciated that following illustrated preferred embodiment, only for description and interpretation the present invention, is not intended to limit the present invention below in conjunction with accompanying drawing.
LTE ascending HARQ is in order to solve uplink mistake bag, uplink need to rely on DCI0 to come to UE instruction scheduling resource, if but there is larger interference in down channel, or some other reasons, UE has lost the DCI0 that base station issues, can finally cause like this ascending HARQ failure, cause mistake bag.In the present invention, activate detection by carry out DCI0 in base station side, judge whether UE loses DCI0, if lost DCI0, base station side keeps RV value according to certain rule.If do not lose, upgrade RV value.The HARQ retransmitting under IR adaptive model need to redistribute PDCCH frequency domain resource, need to re-issue DCI0.And PDCCH frequency domain resource is fixed under IR non-self-adapting pattern, only need in new biography, issue DCI0.The in the situation that of many UE, limited PDCCH frequency domain resource will cause the probability of HARQ failure under IR non-self-adapting pattern larger, the pluses and minuses of comprehensive these two kinds of patterns, can be under IR adaptive model and IR non-self-adapting pattern flexible transformation reach and both reduce the failure of LTE ascending HARQ, make again PDCCH resource obtain more reasonably utilizing.
A kind of providing based on channel is provided and activates the transmission method detecting, by using DCI0 to activate testing mechanism, make corresponding selection judgement.Fig. 1 is the transmission method flow chart that activation detects based on channel that the embodiment of the present invention provides, and as shown in Figure 1, step comprises:
Step 101, base station issue for making terminal send the schedule information of business datum to terminal, and described schedule information comprises and is used to indicate the Downlink Control Information DCI0 that the redundancy versions RV value of scheduling resource is zero.
Step 102, base station be according to described schedule information, the business datum of uploading at predetermined running time-frequency resource receiving terminal.
Verification is carried out to described business datum in step 103, base station.
Step 104, in the time of check errors, base station utilizes signal power or the signal to noise ratio of described business datum, judges whether terminal has lost described schedule information.When the signal to noise ratio that is less than signal power threshold value or described business datum when the signal power of described business datum is less than snr threshold, described schedule information that base station has judged lost terminal.
Step 105, base station utilize judged result, carry out mixed automatic retransfer HAQR mode adjudging and process and HARQ retransmission process, so that control terminal carries out HARQ re-transmission according to result.
In described step 105, in the time of the described schedule information that judged lost terminal of base station, base station is IR adaptive model by HARQ mode adjustment, and keep former RV value, then, resend schedule information to terminal, described schedule information comprises that RV value is zero Downlink Control Information DCI0, so that terminal, according to described schedule information, is sent to base station by business datum.In the time that base station judges that terminal is not lost described schedule information, base station is IR non-self-adapting pattern by HARQ mode adjustment, and upgrades RV value, then, send PHICH indication information to terminal, so that terminal is according to described PHICH indication information, upgrade RV value, and business datum is sent to base station.
The present invention is directed to the scene of LTE ascending HARQ transmission, also provide a kind of providing based on channel to activate the transmitting device detecting, reduce the failure of LTE ascending HARQ by using DCI0 to activate testing mechanism, make PDCCH resource obtain more reasonably utilizing simultaneously.Fig. 2 be the embodiment of the present invention provide activate based on channel the transmitting device structured flowchart detecting, as shown in Figure 2, comprise be arranged on base station side with lower unit:
Data transmit-receive unit, for issuing to terminal for making terminal send the schedule information of business datum, and according to described schedule information, the business datum of uploading at predetermined running time-frequency resource receiving terminal, wherein, described schedule information comprises and is used to indicate the Downlink Control Information DCI0 that the redundancy versions RV value of scheduling resource is zero.
Data check unit, for carrying out verification to the described business datum of receiving.
Activate decision unit, for when the data check unit check errors, utilize power or the signal to noise ratio of described business datum, judge whether terminal has lost described schedule information.Signal to noise ratio or the power measurement amount etc. of the business datum that specifically, base station side is uploaded by computing terminal detect UE and whether have lost the DCI0 of base station side.When the signal to noise ratio that is less than signal power threshold value or described business datum when the signal power of described business datum is less than snr threshold, described schedule information that base station has judged lost terminal.
Mode decision unit, for utilizing judged result, carries out the processing of mixed automatic retransfer HAQR mode adjudging.Specifically, DCI0 based on activating judging unit activates judgement, carry out issuing of DCI0 or do not issue according to certain rules modification HARQ pattern, in the time activating the decision unit described schedule information that judged lost terminal, mode decision unit is IR adaptive model by HARQ mode adjustment, issues DCI0, otherwise, be IR non-self-adapting pattern by HARQ mode adjustment, do not issue DCI0.
Retransmission process unit, for utilizing judged result, carries out HARQ retransmission process, so that control terminal carries out HARQ re-transmission according to result.Specifically, the DCI0 based on activating decision unit activates judgement, and according to certain rules modification RV value,, in the time of the activation decision unit described schedule information that judged lost terminal, retransmission process unit keeps former RV value, otherwise, renewal RV value.
Wherein, when data check unit check errors and while activating the decision unit described schedule information that judged lost terminal, data transmit-receive unit resends schedule information to terminal, described schedule information comprises that RV value is zero Downlink Control Information DCI0, so that terminal, according to described schedule information, is sent to base station by the business datum of re-transmission.When data check unit check errors and activate decision unit while judging that terminal is not lost described schedule information, data transmit-receive unit only sends PHICH indication information to terminal, so that terminal, according to described PHICH indication information, is upgraded RV value, and the business datum of re-transmission is sent to base station.
That describes this device in detail below in conjunction with accompanying drawing 3 to Fig. 5 realizes principle and operating mechanism:
Fig. 3 be described in Fig. 2 in device channel activate overhaul flow chart, as shown in Figure 3, step comprises:
The first step, base station side issue RV value and equal the new biography business datum that 0 DCI0 dispatches UE, and UE goes up sending service data according to the DCI0 of base station.
Second step, base station, at the running time-frequency resource of specifying, are detected the upper business datum of sending out of UE, and described business datum are carried out to CRC check, and judge whether UE has lost DCI0.
The 3rd step, according to judged result, judgement uplink transmission mode be with IR adaptive model or with IR non-self-adapting pattern.Whether concrete judgement flow process as shown in Figure 4, has lost DCI0 if base station judges UE, and judgement is IR adaptive model, otherwise, adjudicate as IR non-self-adapting pattern.
The 4th step, according to judged result, carry out the selection of the RV version of HARQ re-transmission.As shown in Figure 5, base station judges that UE has lost DCI0 to concrete HARQ retransmission process flow process, and RV value is got last RV value, and RV value remains unchanged, otherwise, upgrade RV value.
That is to say, if CRC check mistake, base station need to be enabled retransmission mechanism and ensure transmission so, and according to DCI0 testing result, the selection of the RV version retransmitting.If UE has lost the DCI0 of base station, DCI0 un-activation, the RV version number that now HARQ retransmits is consistent with the RV version number of transmission last time (new biography or re-transmission), and RV version number continues as 0, and re-issue DCI0, uplink transmission mode is adjusted into adaptive model.If UE does not lose DCI0, the RV version number that now HARQ retransmits is updated to 2, and uplink transmission mode is adjusted into non-self-adapting pattern.
Although above the present invention is had been described in detail, the invention is not restricted to this, those skilled in the art of the present technique can carry out various amendments according to principle of the present invention.Therefore, all amendments of doing according to the principle of the invention, all should be understood to fall into protection scope of the present invention.
Claims (10)
1. activate based on channel the transmission method detecting, it is characterized in that, comprising:
Base station issues for making terminal send the schedule information of business datum to terminal;
The business datum that base station receiving terminal is uploaded;
Verification is carried out to described business datum in base station;
In the time of check errors, base station utilizes described business datum, judges whether terminal has lost described schedule information;
Base station utilizes judged result, carries out mixed automatic retransfer HAQR mode adjudging and processes and HARQ retransmission process, so that control terminal carries out HARQ re-transmission according to result.
2. method according to claim 1, is characterized in that, base station is according to described schedule information, the business datum of uploading at predetermined running time-frequency resource receiving terminal.
3. method according to claim 2, is characterized in that, described base station judges whether terminal has been lost the step of described schedule information and comprised:
Signal power or the signal to noise ratio of described business datum calculated in base station;
When the signal to noise ratio that is less than signal power threshold value or described business datum when the signal power of described business datum is less than snr threshold, base station determines that described business datum does not adapt with described schedule information, and the described schedule information that judged lost terminal.
4. method according to claim 3, is characterized in that, the step of described HARQ mode adjudging processing comprises:
In the time of the described schedule information that judged lost terminal of base station, be IR adaptive model by HARQ mode adjustment, otherwise, be IR non-self-adapting pattern by HARQ mode adjustment.
5. method according to claim 4, is characterized in that, described HARQ retransmission process step comprises:
In the time of the described schedule information that judged lost terminal of base station, keep former redundancy versions RV value, otherwise, upgrade RV value.
6. according to the method described in claim 1-5 any one, it is characterized in that, described schedule information comprises and is used to indicate the Downlink Control Information DCI0 that the RV value of scheduling resource is zero.
7. method according to claim 6, is characterized in that, the step that described control terminal carries out HARQ re-transmission according to result comprises:
Base station resends schedule information according to IR adaptive model to terminal, and described schedule information comprises that RV value is zero Downlink Control Information DCI0;
Terminal, according to described schedule information, is sent to base station by business datum.
8. method according to claim 6, is characterized in that, the step that described control terminal carries out HARQ re-transmission according to result comprises:
Base station sends physical mixed automatic re-transmission indicating channel PHICH indication information to terminal;
Terminal, according to described PHICH indication information, is upgraded RV value, and business datum is sent to base station.
9. activate based on channel the transmitting device detecting, it is characterized in that, comprise be arranged on base station side with lower unit:
Data transmit-receive unit, for issuing to terminal for making terminal send the schedule information of business datum, and the business datum uploaded of receiving terminal;
Data check unit, for carrying out verification to described business datum;
Activate decision unit, for when the check errors, utilize described business datum, judge whether terminal has lost described schedule information;
Mode decision unit, for utilizing judged result, carries out the processing of mixed automatic retransfer HAQR mode adjudging;
Retransmission process unit, for utilizing judged result, carries out HARQ retransmission process, so that control terminal carries out HARQ re-transmission according to result.
10. device according to claim 9, is characterized in that, described data transmit-receive unit is also for sending physical mixed automatic re-transmission indicating channel PHICH indication information or resend schedule information to terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310033187.0A CN103973418B (en) | 2013-01-29 | 2013-01-29 | A kind of transmission method and device based on Channel Activation detection |
| PCT/CN2013/085647 WO2014117543A1 (en) | 2013-01-29 | 2013-10-22 | Transmission method and apparatus based on channel activation detection |
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| CN201310033187.0A CN103973418B (en) | 2013-01-29 | 2013-01-29 | A kind of transmission method and device based on Channel Activation detection |
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Also Published As
| Publication number | Publication date |
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| CN103973418B (en) | 2018-10-19 |
| WO2014117543A1 (en) | 2014-08-07 |
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