Embodiment
Inventor notices realizing in process of the present invention: in real system, a transmission mode may comprise multiple transmission plan, and supports the pattern between all kinds of transmission plans to switch; And in order to guarantee better transmission performance and the stability of a system, in the transmission mode of supporting CoMP to transmit, often need to support the switching to unicast.Concrete, system also can be passed through the different CSI-RS(Channel State Information Reference Signal of configuration, channel state information reference signals), make UE can measure the down channel of each transfer point.Wherein, this transfer point may not be the transfer point of a physics, but a virtual transfer point, and each virtual transmission is o'clock corresponding to a CSI-RS resource, is made up of the transfer point of one or more physics.
At TDD(Time Division Duplexing, time division duplex) in system, eNB(evolved NodeB, base station) can pass through SRS(Sounding Reference Signal, upstream detection pilot frequency) channel estimating, and obtain the spatial character of part or all of down channel by channel reciprocity.For example, if each antenna has been realized good up-downgoing reciprocity calbration in transfer point, can not feed back the PMI(Precoding Matrix Indicator of each transfer point, pre-coding matrix indication) index information; If each antenna has been realized good up-downgoing reciprocity calbration between transfer point, the also relative phase information between feedback transmission point not.Further, in FDD(Frequency Division Duplex, Frequency Division Duplexing (FDD)) in system, also there is certain reciprocal relation in long-term, the broad-band channel state information of up-downgoing channel, in some cases, also can not feed back the broadband/long-term PMI information of each transfer point.
Having realized after down channel measurement, carry out information feedback according to the needed channel condition information of transmission plan, all kinds of transmission plans need corresponding channel condition information support.For example, DPS needs the channel condition information of multiple transfer points, or the channel condition information of some transfer points and the corresponding CSI-RS index information of this transfer point; CBF and irrelevant JT need to main transfer point RI(Rank Indication, order indication) channel condition information of not limited channel condition information and the RI=1 of non-main transfer point; Relevant JT need to main transfer point the not limited channel condition information of RI, the channel condition information of the RI=1 of each transfer point, and the relative phase information of each transfer point.Wherein, main transfer point is the transfer point to UE transmission data in DPS and CBF, if or JT while returning back to unicast to the transfer point of UE transmission data.
In the time of actual realization, the mode that can feed back by classification realizes general feedback, to measuring assembly, (measuring assembly is that network equipment is a transfer point set of UE configuration, UE need to observe the channel condition information of the transfer point in this measuring assembly, and realize feedback) in the channel condition information of each transfer point feedback single-point, and phase information and/or the amplitude information between feedback transmission point respectively.Afterwards, network equipment is based on the synthetic channel condition information that transfer point in measuring assembly is arrived to UE of this two parts information.
To comprise two transfer points in measuring assembly as example, two transfer points are designated as respectively H to the channel of UE
1and H
2, UE is that two transfer points are selected respectively pre-coding matrix w
1and w
2(pre-coding matrix is channel condition information), the phase place of two minizones and amplitude information g can choose as follows:
Wherein, g belongs to predefined codebook set; If w
1and w
2columns be designated as M, the diagonal matrix that g is M*M, when M=1, g deteriorates to a scalar; If g is scalar, its codebook set A can be 16QAM(Quadrature Amplitude Modulation, digital modulator) point in planisphere, also QPSK(Quadrature Phase Shift Keying, Quadrature Phase Shift Keying) point in planisphere.
In such scheme, UE puts on an equal footing all transfer points in the time of feedback.And in fact, the effect of these transfer points is not identical; For example, in cooperative scheduling/wave beam forming and dynamic transmission point selection scheme, only have 1 point to send data to UE, the required precision meeting of the channel information of this transfer point is higher than other transfer point, and this transfer point should support space multiplexing transmission (allowing RANK(is spatial reuse number of data layers) >1).
Based on the processing mode of different schemes, inventor finds: dynamic transmission point selection scheme in fact only needs the channel condition information of 1 transfer point, and in order to support other schemes, the information of other transfer points also needs feedback, but do not have any meaning for dynamic transmission point selection scheme.In addition, JP scheme supports high RANK transmission can't bring obvious performance boost, and can bring very high complexity to feedback, therefore supports the feedback of JP scheme only to need the channel condition information of the RANK 1 of each transfer point.
In addition, at existing LTE(Long Term Evolution, Long Term Evolution) in system, support two class information feedback modes, based on PUCCH(Physical Uplink Control Channel, Physical Uplink Control Channel) periodic feedback and based on PUSCH(Physical Uplink Shared Channel, Physical Uplink Shared Channel) aperiodic channel status information feedback.
As shown in table 1, in the periodic feedback based on PUCCH, comprise 4 class Report modes (reporting mode), be respectively pattern 1-0,2-0,1-1 and 2-1; As shown in table 2, various reports pattern comprises altogether 1,1a, 2,2a, 2b, 2c, 3,4,5,6 totally 10 kinds of Report Types (reporting type).Wherein, pattern 1-0 and 2-0 support not comprise the information feedback of PMI feedback, can be for the MIMO(Multiple-Input Multiple-Output in TDD system, multiple-input and multiple-output) transmission; But above Report mode all cannot be supported CoMP transmission.
Table 1
Table 2
Based on above-mentioned discovery, the embodiment of the present invention provides a kind of feedback method, method of reseptance and equipment thereof of channel condition information, UE passes through to support the cycle Report mode of CoMP transmission to network equipment reporting status information of channel, thereby can support various CoMP transmission plans.
Below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment mono-
The embodiment of the present invention one provides a kind of feedback receiver method (for UE side, being feeding back channel state information, for network equipment, is receiving channel state information) of channel condition information, and as shown in Figure 1, the method comprises the following steps:
Step 101, UE determines channel condition information based on channel estimation value.
Step 102, UE utilizes the cycle Report mode feeding back channel state information of supporting CoMP transmission, and UE passes through PUCCH channel to network equipment (as eNB, base station etc.) feeding back channel state information.
Wherein, cycle Report mode comprises: for feeding back main transfer point CQI(Channel Quality Indicator, channel quality indication) Report Type; And/or, for feeding back the Report Type of non-main transfer point CQI.
In the embodiment of the present invention, at the Report Type for feeding back main transfer point CQI, also can comprise the corresponding channel state information reference signals CSI-RS numbering of main transfer point.
At the Report Type for feeding back non-main transfer point CQI, also can comprise the relative phase information between non-main transfer point and main transfer point.
At the Report Type for feeding back main transfer point CQI, for feeding back the Report Type of main transfer point CQI and the Report Type of non-main transfer point CQI, for feeding back the Report Type of non-main transfer point CQI, CQI is the CQI that single codeword CQI(only comprises a code word).
At the Report Type for feeding back main transfer point CQI, comprise Report Type for feeding back main transfer point broadband CQI and/or for feeding back the Report Type of main transfer point subband CQI.
In the embodiment of the present invention, in order to support CoMP transmission, in designed cycle Report mode, can comprise existing PUCCH Report Type, also can comprise some new Report Types.Therefore:
Be the PUCCH Report Type 4(reporting type 4 of LTE/LTE-A system for the Report Type that feeds back main transfer point broadband CQI); Or, be Report Type 4a(reporting type 4a for the Report Type that feeds back main transfer point broadband CQI, be improved reporting type 4), this report type 4a is used for feeding back main transfer point broadband CQI and the corresponding CSI-RS numbering of main transfer point.Wherein, for Report Type 4a, the CSI-RS index information of its main transfer point comprising is B bit altogether.
Be the PUCCH Report Type 1(reporting type 1 of LTE/LTE-A system for the Report Type that feeds back main transfer point subband CQI); Or, be Report Type 1b(reporting type 1b for the Report Type that feeds back main transfer point subband CQI, be improved reporting type 1), this report Class1 b, for feeding back the main transfer point subband CQI(that does not comprise subband location index information for Report Type 1b, can not comprise subband location index information).
At the Report Type for feeding back non-main transfer point CQI, comprise Report Type for feeding back non-main transfer point broadband CQI and/or for feeding back the Report Type of non-main transfer point subband CQI.Wherein:
Be the PUCCH Report Type 4(reporting type 4 of LTE/LTE-A system for the Report Type that feeds back non-main transfer point broadband CQI); Or, be Report Type 4-e(reporting type 4-e for the Report Type that feeds back non-main transfer point broadband CQI), this report type 4-e is used for feeding back broadband relative phase information between non-main transfer point broadband CQI information and non-main transfer point and main transfer point.
It should be noted that, in the time not comprising with the relative phase information of main transfer point in Report Type 4-e, Report Type 4-e can deteriorate to existing Report Type 4, but be with original transmission mode difference: in original reporting mode, Report Type 4 feeds back the broadband CQI information of same transfer point, and in reporting mode in the embodiment of the present invention, the Report Type 4 not reporting in the same time feeds back the broadband CQI information of different transfer points.
Be the PUCCH Report Type 1(reporting type 1 of LTE/LTE-A system for the Report Type that feeds back non-main transfer point subband CQI); Or, be Report Type 1-e(reporting type 1-e for feeding back the Report Type of non-main transfer point subband CQI).
In said process, Report Type 1-e is used for feeding back subband relative phase information between non-main transfer point subband CQI information and non-main transfer point and main transfer point.
In said process, Report Type 1-e is for feeding back the subband relative phase information that does not comprise subband location index information between non-main transfer point subband CQI and/or non-main transfer point and main transfer point.
In said process, in Report Type 1-e, also can comprise subband location index information.
In the embodiment of the present invention, in the time not comprising subband location index information, between the non-main transfer point subband CQI that Report Type 1-e feeds back and/or non-main transfer point and main transfer point, subband relative phase information is with the last main transfer point subband CQI information of feeding back is corresponding identical with reference to frequency domain resource position before.
It should be noted that above-mentioned relative phase information can be the phase information in broadband, and the bit number of each broadband phase information is B3; Above-mentioned relative phase information can be the phase information of subband, and the subband position that the phase information of subband reports with CQI is identical; The bit number of the phase information of each subband is B4.
In the embodiment of the present invention, the CQI information bit in Report Type 4-e and/or Report Type 1-e is less than 4 bits.Wherein, it is that information bit that the CQI of each code word comprises can be less than the information bit that the CQI of the each code word of main transfer point comprises that the information bit that the CQI of each code word comprises is less than information bit that the CQI of each code word of main transfer point comprises, for example, the bit number of broadband single codeword CQI and subband single codeword CQI is respectively B1 or B2 bit.
It should be noted that, the report cycle of channel condition information with report timing off-set amount to carry out semi-static control by high-level signaling, and report cycle and report timing off-set amount to carry out separate configurations.Further, the Report Type that the various combination of reporting source of channel state information content is corresponding different, and priority corresponding to different Report Types; When according to the report cycle of each Report Type when reporting timing off-set amount to determine to bump between different Report Types, UE selects the Report Type of high priority to report.
Particularly, a kind of Report mode comprises above-mentioned partial report type, and the Report Type set comprising is when different, is different Report modes; In above-mentioned new Report mode, can also increase other Report Type, and in this report pattern, the report cycle of each Report Type with report timing off-set amount to carry out semi-static control by high-level signaling, and its report cycle can separate configurations with the timing off-set amount that reports.In the embodiment of the present invention, need to be in advance for the each Report Type using in new Report mode distributes different priority, and work as according to the report cycle of each Report Type and timing off-set, determine in the time bumping between different Report Types, UE need to select the Report Type of high priority to report, and abandons the Report Type of low priority.
In the embodiment of the present invention, in order to guarantee that network equipment can obtain the frequency selectivity information of down channel, and keep as far as possible lower PUCCH feedback overhead, the mode that can adopt polling mode take BP as unit to carry out or carry out take BP as unit subband selection of giving the correct time on subband is carried out, and indicates by the subband index (subband lable) of L bit.
Based on above-mentioned situation, the Report mode that the embodiment of the present invention provides can be as shown in table 3.
Table 3
The channel condition information of the UE side feedback based on above-mentioned, at network side, can also comprise the following steps:
Step 103, network equipment utilization supports the cycle Report mode of CoMP transmission to receive the channel condition information of UE feedback.
Wherein, this cycle Report mode comprises: for feeding back the Report Type of main transfer point channel quality indicator (CQI); And/or, for feeding back the Report Type of non-main transfer point CQI.
In the embodiment of the present invention, at the Report Type for feeding back main transfer point CQI, also can comprise the corresponding channel state information reference signals CSI-RS numbering of main transfer point.
At the Report Type for feeding back non-main transfer point CQI, also can comprise the relative phase information between non-main transfer point and main transfer point.
At the Report Type for feeding back main transfer point CQI, for feeding back the Report Type of main transfer point CQI and the Report Type of non-main transfer point CQI, for feeding back the Report Type of non-main transfer point CQI, CQI is single codeword CQI.
At the Report Type for feeding back main transfer point CQI, comprise Report Type for feeding back main transfer point broadband CQI and/or for feeding back the Report Type of main transfer point subband CQI.
At the Report Type for feeding back non-main transfer point CQI, comprise Report Type for feeding back non-main transfer point broadband CQI and/or for feeding back the Report Type of non-main transfer point subband CQI.
Step 104, network equipment is processed according to channel condition information.In this processing procedure embodiment of the present invention, repeat no longer in detail.
Embodiment bis-
Based on the inventive concept same with said method, a kind of subscriber equipment is also provided in the embodiment of the present invention, as shown in Figure 2, this subscriber equipment comprises:
Determination module 11, for determining channel condition information based on channel estimation value;
Sending module 12, supports the cycle Report mode of multipoint cooperative CoMP transmission to feed back described channel condition information for utilizing; Wherein, described cycle Report mode comprises: for feeding back the Report Type of main transfer point channel quality indicator (CQI); And/or, for feeding back the Report Type of non-main transfer point CQI.
For feeding back the Report Type of main transfer point CQI, also can comprise the corresponding channel state information reference signals CSI-RS numbering of main transfer point described.
For feeding back the Report Type of non-main transfer point CQI, also can comprise the relative phase information between described non-main transfer point and main transfer point described.
Described, for feeding back the Report Type of main transfer point CQI, for feeding back the Report Type of main transfer point CQI and the Report Type of non-main transfer point CQI, for feeding back the Report Type of non-main transfer point CQI, CQI is single codeword CQI.
For feeding back the Report Type of main transfer point CQI, comprise Report Type for feeding back main transfer point broadband CQI and/or for feeding back the Report Type of main transfer point subband CQI described.
Described is LTE/LTE-A Physical Uplink Control Channel PUCCH Report Type 4 for feeding back the Report Type of main transfer point broadband CQI; Or described is Report Type 4a for feeding back the Report Type of main transfer point broadband CQI, described Report Type 4a is used for feeding back main transfer point broadband CQI and the corresponding CSI-RS numbering of main transfer point.
Described is LTE/LTE-A Physical Uplink Control Channel PUCCH Report Type 1 for feeding back the Report Type of main transfer point subband CQI; Or described is Report Type 1b for feeding back the Report Type of main transfer point subband CQI, described Report Type 1b is for feeding back the main transfer point subband CQI that does not comprise subband location index information.
For feeding back the Report Type of non-main transfer point CQI, comprise Report Type for feeding back non-main transfer point broadband CQI and/or for feeding back the Report Type of non-main transfer point subband CQI described.
Described is LTE/LTE-A Physical Uplink Control Channel PUCCH Report Type 4 for feeding back the Report Type of non-main transfer point broadband CQI; Or described is Report Type 4-e for feeding back the Report Type of non-main transfer point broadband CQI, described Report Type 4-e is used for feeding back broadband relative phase information between non-main transfer point broadband CQI information and described non-main transfer point and main transfer point.
Described is LTE/LTE-A Physical Uplink Control Channel PUCCH Report Type 1 for feeding back the Report Type of non-main transfer point subband CQI; Or described is Report Type 1-e for feeding back the Report Type of non-main transfer point subband CQI;
Wherein, described Report Type 1-e is used for feeding back subband relative phase information between non-main transfer point subband CQI information and described non-main transfer point and main transfer point; Or described Report Type 1-e is for feeding back the subband relative phase information that does not comprise subband location index information between non-main transfer point subband CQI and/or described non-main transfer point and main transfer point.
Between the non-main transfer point subband CQI that described Report Type 1-e feeds back and/or described non-main transfer point and main transfer point, subband relative phase information is with the last main transfer point subband CQI information of feeding back is corresponding identical with reference to frequency domain resource position before.
Described Report Type 1-e comprises subband location index information.
CQI information bit in Report Type 4-e and/or Report Type 1-e is less than 4 bits.
The report cycle of described channel condition information with report timing off-set amount to carry out semi-static control by high-level signaling, and described report cycle with report timing off-set amount to carry out separate configurations.
The Report Type corresponding to various combination of described reporting source of channel state information content, and priority corresponding to different Report Types; When according to the report cycle of each Report Type when reporting timing off-set amount to determine to bump between different Report Types, described sending module, reports for the Report Type of selecting high priority.
Wherein, the modules of apparatus of the present invention can be integrated in one, and also can separate deployment.Above-mentioned module can be merged into a module, also can further split into multiple submodules.
Embodiment tri-
Based on the inventive concept same with said method, a kind of network equipment is also provided in the embodiment of the present invention, as shown in Figure 3, this network equipment comprises:
Receiver module 21, supports the cycle Report mode of multipoint cooperative CoMP transmission to receive the channel condition information of subscriber equipment feedback for utilizing; Described cycle Report mode comprises: for feeding back the Report Type of main transfer point channel quality indicator (CQI); And/or, for feeding back the Report Type of non-main transfer point CQI;
Processing module 22, for processing according to described channel condition information.
Described for feeding back the Report Type of main transfer point CQI, also can comprise the corresponding channel state information reference signals CSI-RS numbering of main transfer point.
For feeding back the Report Type of non-main transfer point CQI, also can comprise the relative phase information between described non-main transfer point and main transfer point described.
Described, for feeding back the Report Type of main transfer point CQI, for feeding back the Report Type of main transfer point CQI and the Report Type of non-main transfer point CQI, for feeding back the Report Type of non-main transfer point CQI, CQI is single codeword CQI.
For feeding back the Report Type of main transfer point CQI, comprise Report Type for feeding back main transfer point broadband CQI and/or for feeding back the Report Type of main transfer point subband CQI described.
For feeding back the Report Type of non-main transfer point CQI, comprise Report Type for feeding back non-main transfer point broadband CQI and/or for feeding back the Report Type of non-main transfer point subband CQI described.
The report cycle of described channel condition information with report timing off-set amount to carry out semi-static control by high-level signaling, and described report cycle with report timing off-set amount to carry out separate configurations.
Wherein, the modules of apparatus of the present invention can be integrated in one, and also can separate deployment.Above-mentioned module can be merged into a module, also can further split into multiple submodules.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions (can be personal computers in order to make a computer equipment, server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device in embodiment can be distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from the present embodiment.The module of above-described embodiment can be merged into a module, also can further split into multiple submodules.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Disclosed is above only several specific embodiment of the present invention, and still, the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.