CN101404815B - Descending control information processing method - Google Patents
Descending control information processing method Download PDFInfo
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- CN101404815B CN101404815B CN200810175945A CN200810175945A CN101404815B CN 101404815 B CN101404815 B CN 101404815B CN 200810175945 A CN200810175945 A CN 200810175945A CN 200810175945 A CN200810175945 A CN 200810175945A CN 101404815 B CN101404815 B CN 101404815B
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Abstract
The invention discloses a method used for processing descending control information. The method comprises the steps as follows: under the condition that a channel quality indication signaling shows virtual cyclic redundancy check, the channel quality indication signaling is arranged as a fixed value, which is used for indicating a trigger terminal to process a non-periodic report. According to the technical proposal of the invention, CQI indication signaling is shown as the fixed value of virtual CRC indication signaling to indicate the trigger terminal to process the non-periodic report. Compared with the prior art, the invention improves the detection performance of a physical descending control channel.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of processing method of Downlink Control Information.
Background technology
Long Term Evolution (Long Term Evolution abbreviates LTE as) system is the essential planning of third generation partnership, and Fig. 1 shows the structural representation of basic frame structure in the LTE system; As shown in Figure 1, frame structure is divided into radio frames, field, subframe, time slot and four grades of symbol, wherein; The length of a radio frames is 10ms, and a radio frames is made up of two fields, and the length of each field is 5ms; A field is made up of 5 sub-frame; The length of each subframe is 1ms, and a sub-frame is made up of two time slots, and the length of each time slot is 0.5ms.
When the LTE system adopts the regular circulation prefix, time slot comprise 7 length be 66.7us on/descending symbol, wherein, the circulating prefix-length of first symbol is 5.21us, the circulating prefix-length of other 6 symbols is 4.69us.
When the LTE system adopts extended cyclic prefix, time slot comprise 6 length be 66.7us on/descending symbol, wherein, the circulating prefix-length of each symbol is 16.67us.
Downlink Control Information (Downlink Control Information; Abbreviate DCI as) transmit (Physical Downlink Control Channel through Physical Downlink Control Channel; Abbreviate PDCCH as); Terminal (User Equipment abbreviates UE as) is carried out blind Detecting through the CRC (Cyclic Redundancy Check abbreviates CRC as) of DCI and is judged the PDCCH that carries DCI.But because the limited length of CRC causes the likelihood ratio of flase drop higher, thereby causes the decline of systematic function.
In order to improve the detection performance of Physical Downlink Control Channel; The bit that need from the DCI signaling, save is used for virtual CRC; In the practical implementation process; The bit that can save is set to 0 and is used for virtual CRC, and wherein, the bit of saving possibly come from new data indication (the New data indicator among the DCI; Abbreviate NDI as), the Physical Uplink Shared Channel that is used to be scheduled (Physical Uplink Shared Channel; Abbreviate PUSCH as) transmission power control instruction (TPC request), non-periodic channel quality indication (ChannelQuality Indicator abbreviates CQI as) be CQI request, data demodulates pilot tone the cyclic shift amount, mix and retransmit (Hybrid Automatic Repeat Request abbreviates H-ARQ as) process identification (PID) (ID) etc. automatically.
At present; Aperiodic CQI be designated as 1 the expression triggering terminal carry out reporting aperiodic CQI; Be that 0 expression does not have triggering terminal to carry out reporting CQI aperiodic, if the fixed value when CQI aperiodic is used for virtual CRC is set to 0, then the terminal can only periodic report CQI; The condition feedback that is unfavorable for down channel like this can cause the descending scheduling performance decrease.
Summary of the invention
Consider that the fixed value when CQI aperiodic that exists in the correlation technique is used for virtual CRC is set at 0 o'clock; The condition feedback that is unfavorable for down channel; Cause the problem of descending scheduling decreased performance and propose the present invention; For this reason, main purpose of the present invention is to provide a kind of processing method of Downlink Control Information, to address the above problem.
A kind of processing method of Downlink Control Information is provided according to an aspect of the present invention.
Processing method according to Downlink Control Information of the present invention is using the channel quality indication signaling to represent under the situation of virtual CRC; The channel quality indication signaling is set to fixed value; And fixed value is used to indicate triggering terminal to carry out reporting aperiodic, and the said fixing value is 1 or 0.
Further; This method also comprises: other Downlink Control Information instructions that are different from the channel quality indication signaling in use are represented under the situation of virtual CRC; Other Downlink Control Information instructions are set to fixed value; Wherein, the instruction of other Downlink Control Information comprises one of following: the cyclic shift amount of new data indication, transmission power control instruction, data demodulates pilot tone, hybrid automatic repeat request process sign.
Further; This method also comprises: the Downlink Control Information instruction that is different from the channel quality indication signaling in use is represented under the situation of virtual CRC; The new data indication is set to fixed value; Other Downlink Control Information instructions except that the indication of channel quality indication signaling and new data are set to be different from fixed value, and wherein, it is one of following that other Downlink Control Information instructions comprise: the cyclic shift amount of transmission power control instruction, data demodulates pilot tone, H-ARQ process identification (PID).
Through above-mentioned at least one technical scheme of the present invention, carry out reporting aperiodic through the fixed value indication triggering terminal of the CQI indication signaling being represented virtual CRC indication signaling, than prior art, improved the detection performance of Physical Downlink Control Channel.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural representation according to basic frame structure in the correlation technique LTE system;
Fig. 2 is the flow chart according to the processing method of the Downlink Control Information of the inventive method embodiment.
Embodiment
Functional overview
Basic ideas of the present invention are: because aperiodic, the CQI occurrence frequency was less; Therefore aperiodic the CQI indication signaling be arranged to 1 probability much smaller than aperiodic the CQI indication signaling be arranged to 0 probability; If but do not use aperiodic CQI indication signaling to be used for virtual CRC, the bit number of virtual CRC would then be reduced, based on this; The present invention has provided a kind of definition mode when aperiodic, the CQI indication signaling was used for virtual CRC; Solve the problems referred to above, make that aperiodic, the CQI indication signaling both can be used to indicate virtual CRC, guaranteed good feedback of down channel situation again.
To combine accompanying drawing to describe the present invention in detail below.
Method embodiment
According to the embodiment of the invention, a kind of processing method of Downlink Control Information is provided.
Need to prove that for the ease of describing, illustrated and described the technical scheme of method embodiment of the present invention hereinafter with the form of step, shown hereinafter step can be carried out in the computer system such as a set of computer-executable instructions.Though in relevant accompanying drawing, logical order has been shown, in some cases, can have carried out step shown or that describe with the order that is different from here.
Fig. 2 is the flow chart according to the processing method of the Downlink Control Information of the embodiment of the invention, and is as shown in Figure 2, and this method may further comprise the steps:
Step S202 is using the CQI indication signaling to represent that under the situation of virtual CRC, the CQI indication signaling is set to fixed value, and wherein, this fixed value can be 1 or 0;
Step S204, the said fixing value is used to indicate triggering terminal to carry out reporting aperiodic.
In the practical implementation process, other Downlink Control Information instructions that are different from the CQI indication signaling in use are represented can comprise following two kinds of processing modes under the situation of virtual CRC.
Mode one: other Downlink Control Information instructions that are different from the CQI indication signaling are set to the said fixing value; Wherein, the instruction of other Downlink Control Information comprises one of following: the new data indication is NDI, TPC request, the cyclic shift amount of data demodulates pilot tone, H-ARQ process ID.
Mode two: the new data indication is that NDI is set to the said fixing value; Other Downlink Control Information instructions except that CQI indication signaling and new data indication are set to be different from the said fixing value; Here, the instruction of other Downlink Control Information comprises one of following: TPC request, the cyclic shift amount of data demodulates pilot tone, H-ARQ process ID.
Can find out; Pass through technique scheme; Make that aperiodic, the CQI indication signaling both can be used for virtual CRC, can be used to again ask the feedback of down channel situation, and used descending control information format is just the same; Just be used for different scheduling type (semi-continuous scheduling or dynamic dispatching), this scheduling type is distinguished through high-level signaling.
The technical scheme that provides through the embodiment of the invention; Fixed value indication triggering terminal through the CQI indication signaling being represented virtual CRC indication signaling carries out reporting aperiodic; Than prior art, make that aperiodic, the CQI indication signaling both can be used for virtual CRC, guarantee better detection probability; Simultaneously guarantee good feedback of down channel situation again, improved the detection performance of Physical Downlink Control Channel.
Instance one
The cyclic shift amount and the H-ARQ process ID of the TPC command (power control signaling) of the new data indication signaling in the use Downlink Control Information, the PUSCH that is used to be scheduled, CQI indication signaling, data demodulates pilot tone (DM-RS) are represented virtual CRC; Wherein, Cyclic shift amount and the H-ARQ process ID of power control signaling, DM-RS are set to 0; And new data indication signaling and CQI indication signaling be set to 1, and the CQI indication signaling is set to 1 expression and triggers UE and carry out reporting aperiodic.
Can find out, in instance one, use the CQI indication signaling to represent that under the situation of virtual CRC, the CQI indication signaling is set to 1, and the CQI indication signaling is set to 1 expression and triggers UE and carry out reporting aperiodic.Simultaneously, be different from use under the situation of the virtual CRC of other Downlink Control Information instruction expression of CQI indication signaling, the new data indication signaling is set to 1, and cyclic shift amount and the H-ARQ process ID of power control signaling, DM-RS are set to 0.
Instance two
For the Downlink Control Information that is used for semi-continuous scheduling, when using its descending CQI indication signaling to represent virtual CRC, the CQI indication signaling is set to 1; The descending CQI indication signaling of other types Downlink Control Information is confirmed according to the request of scheduling; For example, when needing triggering terminal to carry out reporting CQI aperiodic, the CQI indication signaling is set to 1; When not needing triggering terminal to carry out reporting CQI aperiodic, the CQI indication signaling is set to 0.
Instance three
For the Downlink Control Information that is used for semi-continuous scheduling, when using its descending CQI indication signaling to represent virtual CRC, the CQI indication signaling is set to 0; The descending CQI indication signaling of other types Downlink Control Information is confirmed according to the request of scheduling; For example, when needing triggering terminal to carry out reporting CQI aperiodic, the CQI indication signaling is set to 0; When not needing triggering terminal to carry out reporting CQI aperiodic, the CQI indication signaling is set to 1.
Through the technical scheme of instance two and instance three, can reduce the overhead bit that the physical resource of semi-continuous scheduling data is represented.
Instance four
The cyclic shift amount and the H-ARQ process ID of the TPC command of the new data indication signaling in the use Downlink Control Information, the PUSCH that is used to be scheduled, CQI indication signaling, data demodulates pilot tone are represented virtual CRC; And all signalings in the above-mentioned Downlink Control Information all are set to 1, and the CQI indication signaling is set to 1 expression and triggers UE and carry out reporting aperiodic.
Can find out, in instance four, use the CQI indication signaling to represent that under the situation of virtual CRC, the CQI indication signaling is set to 1, and the CQI indication signaling is set to 1 expression and triggers UE and carry out reporting aperiodic.Simultaneously; Other Downlink Control Information instructions that are different from the CQI indication signaling in use are represented under the situation of virtual CRC; With other Downlink Control Information, for example the new data indication signaling is set to 1, cyclic shift amount and the H-ARQ process ID of power control signaling, DM-RS all are set to 1.
Instance five
The cyclic shift amount and the H-ARQ process ID of the TPC command of the new data indication signaling in the use Downlink Control Information, the PUSCH that is used to be scheduled, CQI indication signaling, data demodulates pilot tone are represented virtual CRC; And all signalings in the above-mentioned Downlink Control Information all are set to 0; And the new data indication signaling is set to 0 expression and has new data transmission, CQI indication signaling to be set to 0 expression to trigger UE and carry out reporting aperiodic.
Can find out, in instance five, use the CQI indication signaling to represent that under the situation of virtual CRC, the CQI indication signaling is set to 0, and the CQI indication signaling is set to 0 expression and triggers UE and carry out reporting aperiodic.Simultaneously; Other Downlink Control Information instructions that are different from the CQI indication signaling in use are represented under the situation of virtual CRC; With other Downlink Control Information, for example the new data indication signaling is set to 0, cyclic shift amount and the H-ARQ process ID of power control signaling, DM-RS all are set to 0.
As stated; By means of the processing method of Downlink Control Information provided by the invention, carry out reporting aperiodic through the fixed value indication triggering terminal of the CQI indication signaling being represented virtual CRC indication signaling, than prior art; Make that aperiodic, the CQI indication signaling both can be used for virtual CRC; Guarantee better detection probability, guarantee good feedback of down channel situation again simultaneously, improved the detection performance of Physical Downlink Control Channel.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. the processing method of a Downlink Control Information is characterized in that, comprising:
Using the channel quality indication signaling to represent under the situation of virtual CRC that said channel quality indication signaling is set to fixed value, and said fixed value is used to indicate triggering terminal to carry out reporting aperiodic.
2. method according to claim 1 is characterized in that, also comprises:
Other Downlink Control Information instructions that are different from said channel quality indication signaling in use represent under the situation of virtual CRC that said other Downlink Control Information instructions are set to said fixed value.
3. method according to claim 2 is characterized in that, it is one of following that said other Downlink Control Information instruction comprises: the cyclic shift amount of new data indication, transmission power control instruction, data demodulates pilot tone, hybrid automatic repeat request (HARQ) sign.
4. method according to claim 1 is characterized in that, also comprises:
The Downlink Control Information instruction that is different from said channel quality indication signaling in use is represented under the situation of virtual CRC; The new data indication is set to said fixed value, and other Downlink Control Information instructions except that said channel quality indication signaling and the indication of said new data are set to be different from said fixed value.
5. method according to claim 4 is characterized in that, it is one of following that said other Downlink Control Information instruction comprises: the cyclic shift amount of transmission power control instruction, data demodulates pilot tone, hybrid automatic repeat request (HARQ) sign.
6. according to each described method in the claim 1 to 5, it is characterized in that said fixed value is 1 or 0.
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| JP5320170B2 (en) * | 2009-06-05 | 2013-10-23 | 株式会社日立製作所 | Wireless communication system, base station and terminal |
| CN101925112B (en) * | 2009-06-10 | 2013-01-23 | 大唐移动通信设备有限公司 | Method and equipment for determining number of channel control blocks |
| CN101594205B (en) * | 2009-06-22 | 2014-08-06 | 中兴通讯股份有限公司南京分公司 | Method for transmitting downlink control signaling of LTE-Advanced system |
| CN101989901B (en) * | 2009-08-06 | 2013-07-10 | 华为技术有限公司 | Downlink data retransmission judging method and device |
| CN101800622B (en) | 2010-01-08 | 2015-10-21 | 中兴通讯股份有限公司 | The signaling configuration method of Physical Uplink Shared Channel and system |
| CN102404085B (en) * | 2010-09-17 | 2014-11-05 | 华为技术有限公司 | Reporting method for channel status information, base station thereof and user equipment thereof |
| WO2013017154A1 (en) * | 2011-07-29 | 2013-02-07 | Fujitsu Limited | Control channel for wireless communication |
| CN103051413B (en) * | 2011-10-17 | 2016-12-07 | 华为技术有限公司 | Realize the method and device that channel quality indicator (CQI) reports |
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Non-Patent Citations (2)
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| Qualcomm Europe.Details on Semi-Persistent Scheduling Activation with Single PDCCH,R1-082542.《3GPP TSG-RAN WG1 #53bis》.2008, * |
| QualcommEurope.DetailsonSemi-PersistentSchedulingActivationwithSinglePDCCH R1-082542.《3GPP TSG-RAN WG1 #53bis》.2008 |
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