CN101986588B - Channel state information feedback method and terminal - Google Patents
Channel state information feedback method and terminal Download PDFInfo
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- CN101986588B CN101986588B CN201010538433.4A CN201010538433A CN101986588B CN 101986588 B CN101986588 B CN 101986588B CN 201010538433 A CN201010538433 A CN 201010538433A CN 101986588 B CN101986588 B CN 101986588B
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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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
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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
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
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Abstract
The invention discloses channel state information feedback method and terminal, wherein a kind of method comprises: UE arranges multiple RI group; UE determines RI; When RI upgrades or the RI group at RI place of the RI group at RI place feedback relative last time changes, UE reports and carries precoding type and indicate PTI value to be the feedback report of 0, and is 0 carry out information feedback according to PTI.By the present invention, reach and improve information feedback accuracy, and reduce the effect of performance loss.
Description
Technical field
The present invention relates to the communications field, in particular to channel state information feedback method and terminal.
Background technology
In wireless communication system, transmitting terminal and receiving terminal often take the mode of spatial reuse to use many antennas to obtain higher speed.Relative to general method for spacial multiplex, a kind of technology of enhancing be receiving terminal by feedback of channel information to transmitting terminal, transmitting terminal uses according to the channel condition information obtained launches precoding technique, greatly can improve transmission performance.
At third generation partner program (3rdGenerationPartnershipProject, referred to as 3GPP) Long Term Evolution (LongTermEvolution, referred to as LTE) in, channel condition information generally comprises but is not limited to following several:
The characteristic vector information of channel, is often called precoding information again.Owing to using code book to feed back this precoding information, be also often called pre-coding matrix instruction (PrecodingMatrixIndicator, referred to as PMI) information.
Channel quality information (ChannelQualityInformation, referred to as CQI), characterize the quality information of channel, channel quality is characterized with the modulation coding mode recommended, more the modulation coding mode of high-order represents that performance is better, 16 kinds of CQI hierarchical selection are supported altogether in LTE, as shown in table 1.
Table 1LTE system CQI level diagram
The order information (RankIndication, referred to as RI) of channel, represents the number of plies of the spatial reuse that channel can be supported, sometimes referred to as the information of layer.RI is positive integer, and generally speaking the value of RI is no more than the number Nt of transmitting antenna.
In traditional feedback, RI/PMI/CQI mates mutually, and such as, PMI could determine corresponding code book according to RI value.CQI carries out feeding back according to RI and PMI, RI.And RI/PMI determines according to the criterion that CQI value is maximum.Stronger correlation is there is between three.
In the standard of LTE, the minimum feedback unit of channel information is subband (Subband), a subband is by several Resource Block (ResourceBlock, referred to as RB) composition, each RB is made up of multiple Resource Unit (ResourceElement, referred to as RE); RE is the least unit of running time-frequency resource in LTE.Object corresponding during UE feedback channel information can be subband, or multiple subband (Multi-Subbands) or fractional bandwidth (BandwidthParts, referred to as BP), and broadband (Wideband).
There is a lot of feedback model in LTE, under different transmission modes, have different feedback models, mainly pay close attention to the feedback model under the transmission mode of Closed-Loop Spatial Multiplexing here.
The feedback system of PMI/RI/CQI comprises following two kinds:
(1) periodic feedback, is mainly carried on the feedback on Physical Uplink Control Channel (PhysicalUplinkControlChannel, referred to as PUCCH).Periodic feedback is that system must configure, and is the most frequently used configuration.
(2) non-periodic feedback, is carried on the feedback on Physical Uplink Shared Channel (PhysicalUplinkSharedChannel, referred to as PUSCH).Non-periodic feedback is irregularly triggering feedback, belongs to auxiliary feedback system, although can improve precision, its expense is larger.
One have 4 kinds of feedback kind (Type) in PUCCH upper signal channel feedback system information cycle in LTE, Closed-Loop Spatial Multiplexing relates to wherein that first three is planted.
Feedback kind (ReportType) 1: the subband CQI of the subband (SB) that feedback UE selects;
Feedback kind (ReportType) 2: CQI and PMI (W) information of feedback broadband (WB);
Feedback kind (ReportType) 3: feedback RI information;
Feedback kind (ReportType) 4: the CQI only feeding back broadband (WB).
Fig. 1 is the feedback schematic diagram according to PUCCHMode2-1 in LTE system in correlation technique, and shown in Fig. 1, the feedback of PMI and CQI is according to corresponding RI information.
Senior Long Term Evolution (LongTermEvolutionAdvanced, LTE-A) system, as the evolution standard of LTE, supports larger system bandwidth (reaching as high as 100MHz), and the existing standard of backward compatibility LTE.In order to improve covering and the throughput of cell edge, LTE-A proposes the technology that some feedbacks strengthen, mainly strengthen the feedback accuracy of code book, this technology can improve ternational Mobile Telecommunications (InternationalMobileTelecommunications-Advance, referred to as the IMT-Advance) system of evolution the availability of frequency spectrum, alleviate frequency spectrum resource in short supply.
This feedback strengthens technology:
(1) feed back two PMI instructions and indicate precoding/characteristic vector information
(2) PMI represent broadband or long time channel attribute, another PMI represents and determines on frequency band or the attribute of channel in short-term.
The feedback aspect of channel information proposes a kind of structure fed back based on two PMI, two PMI are respectively a PMI (PMI1) and the 2nd PMI (PMI2), due to instruction two matrixes that these two PMI often imply, so carry out these two PMI corresponding through conventional matrix W 1 and W2.
The 8 antenna system Rank1-4 code book forms of LTE-A respectively as shown in following table 2-5, Rank5-8 code book similarly φ
n=e
j π n/2, v
m=[1e
j2 π m/32e
j4 π m/32e
j6 π m/32]
t
Table 2LTE-ARank1 code book form signal table
Table 3LTE-ARank2 code book form signal table
Table 4LTE-ARank3 code book form signal table
Table 5LTE-ARank4 code book form signal table
In lte-a system, due to the feedback occurring PMI1 and PMI2, consider that expense limits, the design of its feedback system has had some to change with the feedback in LTE, a main change is precoding type instruction (PrecoderTypeIndication, referred to as PTI) having occurred 1bit.If this information spinner is in order to switch feedback report dynamically.
Fig. 2 is according to the feedback schematic diagram in correlation technique during PTI=0 in one-period, as shown in Figure 2, when PTI=0, the cycle of PMI1 is more than or equal to the cycle of WBPMI2 & CQI, for M times of relation, M is that the integer being more than or equal to 1 is configured by high-level signaling; When PTI=0, the cycle of RI & PTI is more than or equal to the cycle of PMI1, is MRI relation doubly, MRI be more than or equal to 1 integer.
Fig. 3 is according to the feedback schematic diagram in correlation technique during PTI=1 in one-period, as shown in Figure 3, when PTI=1, the cycle of WBPMI2 & CQI is more than or equal to the cycle of SBPMI2 & CQI, for J*K+1, J is the BP number that current bandwidth is corresponding, and K is the parameter of high-rise configuration, and value is integer.When PTI=1, the cycle of RI & PTI is more than or equal to WBPMI2 & CQI, is also MRI times, and MRI is unified to be configured by high level.
For the situation of PTI=0 and PTI=1, the period assignment of each Report is independent. and the configuration in cycle is generally (be WBPMI2 & CQI during PTI=0 with the Report of feedback frequency the fastest (cycle is minimum), be SBPMI2 & CQI during PTI=1) cycle be least unit, be designated as Nc, then configure the period-luminosity relation between each Report.
The method of information feedback is carried out in LTE-A, occur that RI value carries out upgrading and the situation of PTI=1, Fig. 4 is the schematic diagram according to RI and PMI1 mismatch new in correlation technique, UE should find PMI1 and PMI2 corresponding with channel information from code book corresponding to NewRI as shown in Figure 4, and now PMI1 still for RI upgrade before the PMI1 that reports, this PMI1 is the index of channel before of finding out from code book corresponding to old RI is applicable to, the PMI1 matched with old RI, because channel status changes, if mate according to old RI the feedback effects that PMI1 finds corresponding code word not reach channel information to upgrade fast, can causing property loss of energy, if and determine PMI2 according to new RI, the information such as CQI then can be brought due to the unmatched problem of new RI and PMI1, obtain the CSI information of mistake, performance loss is more serious.
To sum up, in correlation technique, carry out channel state information feedback method, channel condition information can be caused inaccurate, and then cause the problem of performance loss.
Summary of the invention
Main purpose of the present invention is to provide channel state information feedback method and terminal, carries out channel state information feedback method at least to solve in above-mentioned correlation technique, channel condition information can be caused inaccurate, and then cause the problem of performance loss.
To achieve these goals, according to an aspect of the present invention, provide a kind of channel state information feedback method, be applied to 8 antenna systems.
Channel state information feedback method according to the present invention comprises: terminal (UE) arranges multiple order information (RI) group; UE determines RI; When RI upgrades or the RI group at RI place of the RI group at RI place feedback relative last time changes, UE reports and carries precoding type and indicate (PTI) value to be the feedback report of 0, and is 0 carry out information feedback according to PTI.
Further, RI group comprises one or more RI.
Further, RI group is: RI group 1={RI=1, RI=2}, RI group 2={RI=3, RI=4}, RI group 3={RI=5, RI=6, RI=7, RI=8}; Or RI group 1={RI=1, RI=2}, RI group 2={RI=3, RI=4}, RI group 3={RI=5, RI=6, RI=7, RI group 4={RI=8}.
Further, said method also comprises: adjacent two carry PTI value be 0 feedback report between the time interval in, cancel feedback RI.
Further, said method also comprises: adjacent two carry PTI be 0 feedback report between the time interval in, feed back the RI information in same RI group.
To achieve these goals, according to a further aspect in the invention, additionally provide a kind of channel state information feedback method, be applied to 8 antenna systems.
Channel state information feedback method according to the present invention comprises: in the feedback cycle of configurating channel state information, precoding type instruction PTI value is that the very first time interval of the feedback report of 0 equals second time interval that PTI value is the feedback report of 1, wherein, the very first time be spaced apart PTI be the feedback report of 0 on call time and time interval of calling time in PTI value next time, second time interval, to be PTI the be feedback report of 1 calls time and time interval of calling time in PTI value next time; Use feedback cycle feeding back channel state information.
Further, configuring PTI in feedback cycle is that cycle of three feedback kind reports in the feedback report of 0 or 1 instruction is identical.
To achieve these goals, in accordance with a further aspect of the present invention, a kind of terminal is additionally provided.
Terminal according to the present invention comprises: arrange module, for multiple order information (RI) group; Determination module, for determining RI; Reporting module, when the RI group for the RI place of the RI group feedback relative last time when RI renewal or RI place changes, reporting and carrying precoding type instruction (PTI) value is the feedback report of 0; Feedback module, for being 0 carry out information feedback according to PTI.
Further, above-mentioned terminal also comprises: the first processing module, for adjacent two carry PTI value be 0 feedback report between the time interval in, cancel feedback RI.
Further, above-mentioned terminal also comprises: the second processing module, for adjacent two carry PTI value be 0 feedback report between the time interval in, feed back the RI information in same RI group.
To achieve these goals, according to another aspect of the invention, a kind of terminal is additionally provided.
Terminal according to the present invention comprises: time configuration module, the very first time interval being the feedback report of 0 for precoding type instruction PTI value in the feedback cycle of configurating channel state information equals second time interval that PTI is the feedback report of 1, wherein, the very first time be spaced apart PTI value be the feedback report of 0 on call time and time interval of calling time in PTI value next time, second time interval, to be PTI value the be feedback report of 1 calls time and time interval of calling time in PTI value next time; Information feedback module, for using feedback cycle feeding back channel state information.
Further, configuration module comprises: configuration submodule, is that the cycle that in the feedback report of 0 or 1, three feedback kind are reported is identical for configuring PTI value in feedback cycle respectively.
Pass through the present invention, terminal is adopted to determine RI, when RI is more capable or the RI group of the RI group at RI place feedback relative last time changes, report PTI value be 0 feedback report, and the feedback of channel condition information is carried out according to the feedback model that PTI is 0 correspondence, solve in correlation technique and carry out channel state information feedback method, channel condition information can be caused inaccurate, and then cause performance loss problem, reach and improve information feedback accuracy, and reduce the effect of performance loss.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the feedback schematic diagram according to PUCCHMode2-1 in LTE system in correlation technique;
Fig. 2 is according to the feedback schematic diagram in correlation technique during PTI=0 in one-period;
Fig. 3 is according to the feedback schematic diagram in correlation technique during PTI=1 in one-period;
Fig. 4 is the schematic diagram according to RI and PMI1 mismatch new in correlation technique;
Fig. 5 is the schematic diagram of error propagation according to PTI=0 in correlation technique and different cycles configuration;
Fig. 6 is the first pass figure of the channel state information feedback method according to the embodiment of the present invention;
Fig. 7 is the second flow chart of the channel state information feedback method according to the embodiment of the present invention;
Fig. 8 is the first structured flowchart of the terminal according to the embodiment of the present invention;
Fig. 9 is preferred first structured flowchart of the terminal according to the embodiment of the present invention;
Figure 10 is the second structured flowchart of the terminal according to the embodiment of the present invention; And
Figure 11 is preferred second structured flowchart of the terminal according to the embodiment of the present invention.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
Present embodiments provide a kind of channel state information feedback method, Fig. 6 is the first pass figure of the channel state information feedback method according to the embodiment of the present invention, and as shown in Figure 6, the method comprises:
Step S602: terminal arranges multiple order information (RI) group.
Step S604: terminal determines RI.
Step S606: when the RI group at the RI place that RI upgrades or the RI group at RI place was fed back relative last time changes, UE reports and carries the feedback report that PTI value is 0, and carries out information feedback according to the feedback model that PTI is 0 correspondence.
Pass through above-mentioned steps, when RI upgrades or RI place RI group changes, report PTI=0 and the feedback model corresponding according to PTI=0 to carry out information feedback simultaneously, overcome in correlation technique when RI upgrade or place RI group change time, still code book corresponding to PMI1 is searched according to old RI, cause the inaccurate problem of information feedback, reach and improve information feedback accuracy, and reduce the effect of performance loss.
Preferably, RI group comprises one or more RI.By the preferred embodiment, RI group comprises one or more RI, RI is carried out grouping and arranges, improve the accuracy that RI reports.
Preferably, above-mentioned RI group is: RI group 1={RI=1, RI=2}, RI group 2={RI=3, RI=4}, RI group 3={RI=5, RI=6, RI=7, RI=8} or RI group 1={RI=1, RI=2}, RI group 2={RI=3, RI=4}, RI group 3={RI=5, RI=6, RI=7}, RI group 4={RI=8}.By the preferred embodiment, by being divided into multiple groups to control respectively RI, improve the accuracy rate that RI reports.
Preferably, said method also comprises: in the time interval between the feedback report that adjacent two PTI values are 0, cancels feedback RI.By the preferred embodiment, in the time interval between the feedback report that PTI is 0, the value of RI does not change, and cancels RI value feedback, reduces the overhead bit of system.
Preferably, said method also comprises: in the time interval between the feedback report that adjacent two PTI are 0, feed back the RI information in same RI group.By the preferred embodiment, in the time interval between the feedback report that PTI is 0, although the value change of RI, also in same RI group, adopt the information of less amount of information to be used to refer to the RI information of RI in RI group, reduce the overhead bit of system.
Present embodiments provide a kind of channel state information feedback method, Fig. 7 is the second flow chart of the channel state information feedback method according to the embodiment of the present invention, and as shown in Figure 7, the method comprises:
Step S702: in the feedback cycle of configurating channel state information, precoding type instruction (PTI) is that the very first time interval of the feedback report of 0 equals second time interval that PTI is the feedback report of 1, wherein, the very first time be spaced apart PTI be the feedback report of 0 on call time and time interval of calling time in PTI value next time, second time interval, to be PTI the be feedback report of 1 calls time and time interval of calling time in PTI value next time.
Step S704: use feedback cycle feeding back channel state information.
Pass through above-mentioned steps, second time interval of to be the very first time interval of the feedback report of 0 and PTI the be feedback report of 1 of the PTI in the feedback cycle of configurating channel state information is equal, when overcoming PTI=0 in correlation technique to be mistakenly detected as PTI=1 or PTI=1 be PTI=0 by error detection, UE is held and eNodeB end generation mismatch, all feedbacks when causing all cannot correctly receive, (Fig. 5 is the schematic diagram of the error propagation according to PTI=0 in correlation technique and different cycles configuration for problem that reponse system is paralysed, as shown in Figure 5), improve the accuracy of information feedback and the robustness of reponse system.
Preferably, below one of step S702 is preferred embodiment described.Configuring PTI in feedback cycle is respectively that cycle of three feedback kind reports in the feedback report of 0 or 1 is identical.By the preferred embodiment, be that the cycle parameter of three feedback kind reports in the feedback report of 0 or 1 is set to identical by PTI, improve the robustness of reponse system.
Embodiment 1
Present embodiments provide a kind of channel state information feedback method, in the present embodiment, UE judges PTI value according to channel information in feedback procedure, RI value, PMI1 value (WB), WBPMI2 or SBPMI2 value, WBCQI or SBCQI value; Then select corresponding reporting policy, reporting schemes may be dynamic change, is mainly a set of reporting schemes of PTI=0 instruction and a set of reporting schemes of PTI=1 instruction.Before PTI value upgrades, reporting schemes can not change.
In the present embodiment, a UE reports RI=2, and the time point of PTI=0 is starting point; Before PTI value upgrades, feed back according to the mode shown in Fig. 2; UE upper once feed back RI/PTI before repeatedly calculate and report PMI1 and WBPMI2 & CQI.
The time point that next RI/PTI reports is (according to RI=2 above, the configuration of PTI=0 feedback cycle can calculate future time point) UE can report new RI value and PTI value, suppose that UE reports RI=2, PTI=1, UE repeatedly reported WBPMI2 & CQI and SBPMI2 & CQI before upper once RI/PTI time point.
The time point that next RI/PTI reports is (according to RI=2 above, the configuration of PTI=1 feedback cycle can calculate future time point) UE reports RI=3, and UE reports PTI=0, UE repeatedly reported PMI1 and WBPMI2 & CQI before upper once RI/PTI.
By that analogy, when RI value does not change, PTI=0 or 1 can be reported, when RI value changes, report PTI=0.
Embodiment 2
Present embodiments provide a kind of channel state information feedback method, in the present embodiment, similar to Example 1, UE judges PTI value according to channel information in feedback procedure, RI value, PMI1 value (WB), WBPMI2 or SBPMI2 value, WBCQI or SBCQI value; Then select corresponding reporting policy, reporting schemes may be dynamic change, is mainly a set of reporting schemes of PTI=0 instruction and a set of reporting schemes of PTI=1 instruction.Before PTI value upgrades, reporting schemes can not change.
In the present embodiment, a UE reports RI=2, and the time point of PTI=0 is starting point; Before PTI value upgrades, feed back according to the mode shown in Fig. 2; UE upper once feed back RI/PTI before repeatedly calculate and report PMI1 and WBPMI2 & CQI.
The time point that next RI/PTI reports is (according to RI=2 above, the configuration of PTI=0 feedback cycle can calculate future time point) UE can report new RI value and PTI value, suppose that UE reports RI=2, PTI=1, UE repeatedly reported WBPMI2 & CQI and SBPMI2 & CQI before upper once RI/PTI time point.
The time point that next RI/PTI reports is (according to RI=2 above, the configuration of PTI=1 feedback cycle can calculate future time point) UE reports RI=3, and UE reports PTI=0, UE repeatedly reported PMI1 and WBPMI2 & CQI before upper once RI/PTI.
Preferably, between the feedback report of two RI/PTI=0, in the report of RI/PTI=1, RI value does not all change, therefore can only feedback PTI and do not feed back the information of RI, saves feedback overhead, improves feedback reliability.
Embodiment 3
Provide a kind of channel state information feedback method in the present embodiment, in the present embodiment, UE judges PTI value according to channel information in feedback procedure, RI value, PMI1 value (WB), WBPMI2orSBPMI2 value, WBCQIorSBCQI value; Then select corresponding reporting policy, reporting schemes may be dynamic change, is mainly a set of reporting schemes of PTI=0 instruction and a set of reporting schemes of PTI=1 instruction.Before PTI value upgrades, reporting schemes can not change.
In the present embodiment, define the value comprising one or more RI in multiple RIGroup, RIGroup, such as:
RIGroup1＝{RI＝1，RI＝2}
RIGroup2＝{RI＝3，RI＝4}
RIGroup3＝{RI＝5，RI＝6，RI＝7，RI＝8}。
Or
RIGroup1＝{RI＝1，RI＝2}
RIGroup2＝{RI＝3，RI＝4}
RIGroup3＝{RI＝5，RI＝6，RI＝7}
RIGroup4＝{RI＝8}。
It should be noted that, aforesaid way is the preferred dividing mode of RI group, and in the present embodiment, RI group divides the dividing mode including but are not limited to above-mentioned RIGroup.
When the RI value reported changes between Group, UE reports PTI=0 to upgrade the feedback of PMI1.When the RI value reported changes in Group, UE can report any one in PTI=0 or 1.
Suppose that a UE reports RI=2, the time point of PTI=0 is starting point; Before PTI value upgrades, feed back according to the mode shown in Fig. 2; UE upper once feed back RI/PTI before repeatedly calculate and report PMI1 and WBPMI2 & CQI.
The time point that next RI/PTI reports is (according to RI=2 above, the configuration of PTI=0 feedback cycle can calculate future time point) UE can report new RI value and PTI value, because RI changes in the group of Group1, therefore PTI can report 0 or 1. hypothesis UE to report RI=1, PTI=1, UE repeatedly reported WBPMI2 & CQI and SBPMI2 & CQI before upper once RI/PTI time point.
The time point that next RI/PTI reports is (according to RI=1 above, the configuration of PTI=1 feedback cycle can calculate future time point) UE reports RI=3, and UE should report PTI=0, UE repeatedly reported PMI1 and WBPMI2 & CQI before upper once RI/PTI.
By that analogy, when OldRI value and NewRI value just change or do not change in certain Group, PTI=0 or 1 can be reported, when OldRI value and NewRI value change between certain Group, should PTI=0 be reported.
Embodiment 4
A kind of channel state information feedback method is provided in the present embodiment, similar to Example 3, but between the report and the report of next PTI=0 of previous PTI=0, the RI information of use just indicates the RI information in Group, can use less bit to feed back.Such as:
Between the report of RI=1, PTI=0 and next time PTI=0, RI only needs 1bit information to feed back, and represents RI=1 or 2;
Between the report of RI=3, PTI=0 and next time PTI=0, RI only needs 1bit information to feed back, and represents RI=3 or 4.
Embodiment 5
Present embodiments provide a kind of channel condition information method, when the configuration cycle of the present embodiment, configuration PTI=0 is equal to the time interval that the time interval that PTI reports equals PTI=1 to PTI next time next time, and uses this configuration to carry out channel condition information to feed back.
The method has two kinds of modes:
(1) mode one: for PTI=0 and PTI=1,3 Report share identical cycle parameter.
Such as: three Report of PTI=0 instruction arrange from big to small with feedback cycle and are designated as ReportA0, ReportB0, ReportC0 respectively; Three Report indicated by PTI=1 arrange from big to small with feedback cycle and are designated as ReportA1, ReportB1, ReportC1 respectively.
Wherein, ReportC1 and the ReportC0 cycle is equal, ReportB1 and the ReportB0 cycle is equal, ReportA1 and the ReportA0 cycle is equal;
(2) mode two:
ReportC1 and the ReportC0 cycle is equal, and ReportB1 is M1 times of the ReportC1 cycle, and ReportB0 is M0 times of the ReportC0 cycle, and ReportA1 is N1 times of the ReportB1 cycle, and ReportA0 is N0 times of the ReportB0 cycle;
Wherein, M1, M0, N1, N0 are integer, and, M1*N1=M0*N0.
Or
ReportC1 and the ReportC0 cycle is unequal, be respectively Nc1 and Nc0 (unit ms), ReportB1 is M1 times of the ReportC1 cycle, and ReportB0 is M0 times of the ReportC0 cycle, ReportA1 is N1 times of the ReportB1 cycle, and ReportA0 is N0 times of the ReportB0 cycle;
Wherein, M1, M0, N1, N0, Nc1, Nc0 are integer, and, M1*N1*Nc1=M0*N0*Nc0.
Embodiment 6
Present embodiments provide a kind of channel state information feedback method, the present embodiment configuration mode, with shown in embodiment 5, can use a higher level parameters jointly to configure for M1, M0, and pre-determines relation between it, as M1=K × M0 or M0=K × M1.A higher level parameters can be used jointly to configure for N1, N0, and pre-determine relation between it, as N1=J × N0 or M0=J × N1.K and J is positive integer.
Present embodiments provide a kind of terminal.Fig. 8 is the first structured flowchart of the terminal according to the embodiment of the present invention, and as shown in Figure 8, this terminal comprises: arrange module 82, determination module 84, reporting module 86 and feedback module 88, be described in detail below to said structure:
Module 82 is set, for arranging multiple order information (RI) group; Determination module 84, is connected to and arranges module 82, for determining RI; Reporting module 86, be connected to determination module 84, upgrade for the RI that determines at determination module 84 or the RI group at RI place of RI group feedback relative last time at RI place changes time, report and carry precoding type and indicate (PTI) value to be the feedback report of 0; Feedback module 88, is connected to reporting module 86, for being that the feedback model of 0 correspondence carries out information feedback according to PTI.
Fig. 9 is preferred first structured flowchart of the terminal according to the embodiment of the present invention, and as shown in Figure 9, terminal also comprises: the first processing module 92 and the second processing module 94, is described in detail said structure below:
First processing module 92, for adjacent two carry PTI value be 0 feedback report between the time interval in, cancel feedback RI.
Second processing module 94, for adjacent two carry PTI value be 0 described feedback report between the time interval in, feed back the RI information in same RI group.
Present embodiments provide a kind of terminal.Figure 10 is the second structured flowchart of the terminal according to the embodiment of the present invention, and as shown in Figure 10, this terminal comprises: configuration module 102 and information feedback module 104, be described in detail said structure below:
Time configuration module 102, the very first time interval being the feedback report of 0 for PTI value in the feedback cycle of configurating channel state information equals second time interval that PTI is the feedback report of 1, wherein, the very first time be spaced apart PTI value be the feedback report of 0 on call time and time interval of calling time in PTI value next time, second time interval, to be PTI value the be feedback report of 1 calls time and time interval of calling time in PTI value next time; Information feedback module 104, is connected to time configuration module 102, for using feedback cycle feeding back channel state information.
Figure 11 is preferred second structured flowchart of the terminal according to the embodiment of the present invention, and configuration module 102 comprises: the first configuration submodule 1022, second configures submodule 1024, is described below to said structure.
Configuration submodule 1022 is that the cycle that in the feedback report of 0 or 1, three feedback kind are reported is identical for configuring PTI value in feedback cycle respectively.
Pass through above-described embodiment, provide channel state information feedback method and terminal, pass through the method, when RI upgrades or RI place RI group changes, report PTI=0 and the feedback model corresponding according to PTI=0 to carry out information feedback simultaneously, overcome in correlation technique, when RI upgrades or place RI group changes, still corresponding PMI is searched according to old RI, cause the inaccurate problem of channel feedback information, reach and improve information feedback accuracy, and reduce the effect of performance loss.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a channel state information feedback method, is applied to 8 antenna systems, it is characterized in that, comprising:
Terminal UE arranges multiple order information RI group;
Described UE determines RI;
When the RI group at the RI place that RI upgrades or the RI group at described RI place was fed back relative last time changes, described UE reports and carries precoding type instruction PTI value is the feedback report of 0, and carries out information feedback according to the feedback system that PTI is 0 correspondence.
2. method according to claim 1, is characterized in that, described RI group comprises one or more RI.
3. method according to claim 2, is characterized in that, described RI group is:
RI group 1={RI=1, RI=2}, RI group 2={RI=3, RI=4}, RI group 3={RI=5, RI=6, RI=7, RI=8}; Or
RI group 1={RI=1, RI=2}, RI group 2={RI=3, RI=4}, RI group 3={RI=5, RI=6, RI=7, RI group 4={RI=8}.
4. method according to claim 1, is characterized in that, also comprises:
Adjacent two carry described PTI value be 0 described feedback report between the time interval in, cancel feedback RI.
5. method according to claim 1, is characterized in that, also comprises:
Adjacent two carry PTI be 0 described feedback report between the time interval in, feed back the RI information in same RI group.
6. method according to claim 1, is characterized in that, it is characterized in that,
Wherein, in the feedback cycle of configurating channel state information, precoding type instruction PTI value is that the very first time interval of the feedback report of 0 equals second time interval that described PTI value is the feedback report of 1, wherein, the described very first time be spaced apart described PTI be the feedback report of 0 on call time and time interval of calling time in described PTI value next time, described second time interval, to be described PTI the be feedback report of 1 calls time and time interval of calling time in described PTI value next time;
Use described feedback cycle feeding back channel state information.
7. method according to claim 6, is characterized in that, configuring PTI described in described feedback cycle is that cycle of three feedback kind report in the feedback report of 0 or 1 instruction is identical.
8. a terminal, is characterized in that, comprising:
Module is set, for multiple order information RI group;
Determination module, for determining RI;
Reporting module, when the RI group for the RI place of the RI group feedback relative last time when RI renewal or described RI place changes, reporting and carrying precoding type instruction PTI value is the feedback report of 0;
Feedback module, for being that the feedback system of 0 correspondence carries out information feedback according to PTI.
9. terminal according to claim 8, is characterized in that, also comprises:
First processing module, for adjacent two carry described PTI value be 0 described feedback report between the time interval in, cancel feedback described RI.
10. terminal according to claim 8, is characterized in that, also comprises:
Second processing module, for adjacent two carry described PTI value be 0 described feedback report between the time interval in, feed back the RI information in same RI group.
11. terminals according to claim 8, also comprise:
Time configuration module, the very first time interval being the feedback report of 0 for precoding type instruction PTI value in the feedback cycle of configurating channel state information equals second time interval that described PTI is the feedback report of 1, wherein, the described very first time be spaced apart described PTI value be the feedback report of 0 on call time and time interval of calling time in described PTI value next time, described second time interval, to be described PTI value the be feedback report of 1 calls time and time interval of calling time in described PTI value next time;
Described feedback module, also for using described feedback cycle feeding back channel state information.
12. terminals according to claim 11, is characterized in that, described time configuration module comprises:
Configuration submodule is that the cycle that in the feedback report of 0 or 1, three feedback kind are reported is identical for configuring PTI value described in described feedback cycle respectively.
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| JP5357126B2 (en) * | 2010-10-04 | 2013-12-04 | 株式会社エヌ・ティ・ティ・ドコモ | Feedback method, mobile terminal apparatus and radio base station apparatus |
| CN101986588B (en) * | 2010-11-09 | 2016-03-30 | 中兴通讯股份有限公司 | Channel state information feedback method and terminal |
| CN103718593A (en) * | 2011-11-08 | 2014-04-09 | 富士通株式会社 | Information feedback method, configuration method and device in coordinated multipoint transmission mode |
| CN103220069A (en) * | 2012-01-20 | 2013-07-24 | 华为技术有限公司 | Method and device for feeding back channel state information |
| EP2710758B1 (en) | 2012-05-11 | 2022-07-06 | Sun Patent Trust | Method of csi reporting, user equipment and enode b |
| CN104579539B (en) * | 2013-10-17 | 2019-01-29 | 辰芯科技有限公司 | A kind of method of LTE terminal and calculating order designator |
| CN106034008B (en) * | 2015-03-13 | 2020-06-19 | 电信科学技术研究院 | Method and device for determining value of precoding type indicator |
| CN108242947B (en) * | 2016-12-26 | 2021-03-19 | 展讯通信（上海）有限公司 | PTI value determination method and device and mobile terminal |
| US10924162B2 (en) | 2017-05-05 | 2021-02-16 | At&T Intellectual Property I, L.P. | Facilitation of incremental feedback for 5G or other next generation network |
| CN108809374B (en) | 2017-05-05 | 2021-08-13 | 华为技术有限公司 | Data transmission method, terminal equipment and network equipment |
| WO2021097589A1 (en) * | 2019-11-18 | 2021-05-27 | Qualcomm Incorporated | Optimization of channel state feedback (csf) report |
| EP4150964A4 (en) * | 2020-05-11 | 2023-06-14 | Telefonaktiebolaget LM Ericsson (PUBL) | Network node, terminal device, and methods therein for rank report configuration |
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