CN102916766B - The method and apparatus of feedback, acquisition channel condition information - Google Patents

The method and apparatus of feedback, acquisition channel condition information Download PDF

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CN102916766B
CN102916766B CN201110224423.8A CN201110224423A CN102916766B CN 102916766 B CN102916766 B CN 102916766B CN 201110224423 A CN201110224423 A CN 201110224423A CN 102916766 B CN102916766 B CN 102916766B
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subband
subbands
cqi
broadband
report
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CN102916766A (en
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王建国
周永行
孙卫军
刘江华
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2012/079724 priority patent/WO2013020488A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0645—Variable feedback
    • H04B7/065—Variable contents, e.g. long-term or short-short
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0658—Feedback reduction
    • H04B7/066—Combined feedback for a number of channels, e.g. over several subcarriers like in orthogonal frequency division multiplexing [OFDM]
    • 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
    • H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
    • 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
    • H04L1/0028—Formatting
    • H04L1/0029—Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/03777—Arrangements for removing intersymbol interference characterised by the signalling
    • H04L2025/03802—Signalling on the reverse channel

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a kind of method of feeding back channel state information, wherein, system bandwidth is divided at least two subbands, said method comprising the steps of: user equipment (UE) obtains broadband channel quality instruction CQI and/or selects broadband pre-coding matrix instruction PMI, and the report moment determined according to the period 1, report described broadband CQI and/or described broadband P MI; And report between the moment at broadband CQI described in two continuous print and/or described broadband P MI, described UE selects two first-selected subbands, obtain the respective subband CQI of described two first-selected subbands and/or subband PMI, and at the respective subband CQI of described two the first-selected subbands of report moment report of setting and/or subband PMI.According to the present invention, can realize timely selection scheduling or rapid link self adaptation frequently, the feedback accuracy avoiding time delay to cause declines.

Description

The method and apparatus of feedback, acquisition channel condition information
Technical field
The present invention relates to wireless communication technology, particularly relate to the method and apparatus of feeding back channel state information and obtain the method and apparatus of channel condition information.
Background technology
In a communications system, channel condition information (ChannelStateInformation, CSI) may be used for scheduling, link circuit self-adapting and precoding etc. usually.At third generation Partnership Program (The3rdGenerationPartnershipProject, 3GPP) Long Term Evolution (LongTermEvolution, LTE) in system, CSI comprises order instruction (RankIndication, RI), pre-coding matrix instruction (PrecodingMatrixIndicator, PMI), channel quality instruction (ChannelQualityIndicator, CQI) and precoding type instruction (PrecodingTypeIndicator, PTI).Subscriber equipment (UserEquipment, UE) can by periodically and aperiodicity two kinds of patterns to enode b (evolvedNodeB, eNB) CSI is fed back, both are respectively by Physical Uplink Control Channel (PhysicalUplinkControlChannel, PUCCH) and Physical Uplink Shared Channel (PhysicalUplinkSharedChannel, PUSCH) transmit CSI information.
Existing LTE system is according to different frequency domain granularity feedback CSI information.System bandwidth is divided into multiple subband, can calculate CQI/PMI, be referred to as subband CQI/PMI for single subband wherein; Also for whole system bandwidth calculation CQI/PMI, broadband CQI/PMI can be referred to as.RI is then usual to be obtained for whole system bandwidth calculation.In addition, system bandwidth can be divided into multiple portions of bandwidth (BandwidthPart, BP), and each BP can comprise multiple subband.
For using the periodicity CSI feedback of PUCCH, eNB is by the high-level signaling semi-statically configuration UE CSI (CQI, PMI, PTI and/or RI) that uses different Mode Feedback different.Feedback broadband CQI and subband CQI can be fed back by PUCCH pattern 2-0 and PUCCH pattern 2-1, PUCCH pattern 2-1 can also be utilized further to feed back broadband P MI (for R10 (Release10, i.e. version 10) system all right feedback further subband PMI), wherein subband is selected from the subband that certain BP comprises.Above-mentioned pattern only feeds back CSI corresponding to a BP at every turn, and the order that can be increased according to frequency by multiple subframes different in time travels through each BP successively, thus realizes the feedback to the subband CQI/ subband PMI that each BP selects.For the CQI/PMI of broadband, above-mentioned subband CQI/ subband PMI feedback provides meticulousr frequency domain dispatching, link circuit self-adapting or precoding.
There is following problem in the method for the feeding back channel state information in LTER10 system:
1, from BP, a first-selected subband is selected and the CQI fed back on this first-selected subband or subband PMI, and have ignored the information of other subband in this BP, therefore more subband CQI on this BP or subband PMI information cannot be provided, be unfavorable for realizing selection scheduling or rapid link self adaptation frequently in time.
2, once can only feed back a first-selected subband CQI or subband PMI on a BP, therefore the subband CQI on more BP or subband PMI information can not be provided in time, be unfavorable for realizing selection scheduling or rapid link self adaptation frequently in time.
Summary of the invention
The embodiment of the present invention provides a kind of method of feeding back channel state information and device thereof and obtains method and the device thereof of channel condition information, to realize selection scheduling or rapid link self adaptation frequently in time.
A method for feeding back channel state information, wherein, system bandwidth is divided at least two subbands, said method comprising the steps of:
UE obtains broadband channel quality instruction CQI and/or broadband pre-coding matrix instruction PMI, and the report moment determined according to the period 1, report described broadband CQI and/or described broadband P MI; And
UE selects two first-selected subbands, obtain the respective subband CQI of described two first-selected subbands and/or subband PMI, and report the respective subband CQI of described two the first-selected subbands of report moment report that set between the moment and/or subband PMI at broadband CQI described in two continuous print and/or described broadband P MI.
According to an embodiment of the invention, the interval in the report moment of above-mentioned setting is fixedly installed as second round, and this second round is hN pd, N pdfor the cycle in units of subframe that the parameter notified based on high-level signaling is determined, described h be more than or equal to 1 integer.
In addition, particularly, report that the report moment of described subband CQI or subband PMI can to report between subframe at two continuous print broadband CQI or broadband P MI and meet the subframe of the condition of following equation 1:
... equation 1.
According to an embodiment of the invention, the above-mentioned period 1 can be HN pd, wherein N pd is the cycle in units of subframe that the parameter notified based on high-level signaling is determined, H is the integer based on the definition of high-level signaling parameter.Further, the value of H can be:
H=JK+1, or
or
wherein, J is the number of BP, and parameter K is configured by high-level signaling, and wherein, expression is not less than smallest positive integral, expression is not more than maximum integer.
In addition, the subframe of the condition meeting following equation 2 can be utilized, report described broadband CQI or broadband P MI with the period 1 of HNpd:
... equation 2
Wherein, n ffor frame number, n sfor timeslot number, N oFFSET, CQIthe side-play amount obtained for the parameter notified based on high-level signaling or the side-play amount arranged according to actual conditions, mod (x) represents that mould x operates.
According to an embodiment of the invention, system bandwidth can be divided at least one BP, and each BP comprises at least one subband, and two above-mentioned first-selected subbands are two subbands from same BP or two subbands from different B P.
According to an embodiment of the invention, in the report moment of above-mentioned setting, the interval in its adjacent report moment is fixed.Further, the interval in above-mentioned adjacent report moment is equal and be fixed as above-mentioned N pd, be called second round.
According to an embodiment of the invention, the interval in above-mentioned adjacent report moment can be specified in advance.Such as, the interval between the adjacent report moment is specified can be followed successively by 1,2,2,2,3 etc.Can be avoided with other possible report (such as ACK/NACK etc.) time of origin conflict by the interval of given settings.
According to an embodiment of the invention, two above-mentioned first-selected subbands are two subbands from same BP, or from two subbands of different B P.
According to an embodiment of the invention, when above-mentioned two first-selected subbands are two subbands from same BP, two subbands in corresponding different report moment from BP respectively be BP jwith+BP (j+1) mod (J), wherein j and (j+1) mod (J) is the index of BP, and J is the number of BP.Such as, for 5 BP, BP is followed successively by 0, BP 1..., BP 4, BP 0, BP 1....And when above-mentioned two first-selected subbands are two subbands from different B P, two subbands can be respectively from BP jand BP (j+1) mod (J)the first-selected subband of middle selection, namely one of them subband is from BP j, another subband is from BP (j+1) mod (J), wherein j and (j+1) mod (J) is the index of BP.Such as, for 5 BP, (BP is followed successively by 0, BP 1), (BP 2, BP 3), (BP 4, BP 0), (BP 1, BP 2) ....Again such as, for 4 BP, (BP is followed successively by 0, BP 1), (BP 2, BP 3), (BP 0, BP 1), (BP 2, BP 3) ....
According to an embodiment of the invention, in the report moment at least defined at one, described two first-selected subbands are two subbands from same BP; And in the report moment at least defined at one, described two first-selected subbands are respectively from two subbands of two different B P.Such as, for 5 BP, two first-selected subbands are respectively from two subbands of two different B P, are followed successively by (BP 0, BP 1), (BP 2, BP 3), described two first-selected subbands are from same BP, i.e. BP 4two subbands.Again such as, described two first-selected subbands are from same BP, i.e. BP 0two subbands, two first-selected subbands are respectively from two subbands of two different B P, are followed successively by (BP 1, BP 2), (BP 3, BP 4).In addition, other compound mode that may specify can also be adopted.
According to an embodiment of the invention, the report moment at least set by one, select a first-selected subband and report subband CQI and/or the subband PMI of described first-selected subband, and in the report moment at least defined at one, select two first-selected subbands and report the respective subband CQI of described two first-selected subbands and/or subband PMI.Such as, for 5 BP, two first-selected subbands are respectively from two subbands of two different B P, are followed successively by (BP 0, BP 1), (BP 2, BP 3), a described first-selected subband is from BP 4.Again such as, a described first-selected subband is BP 0, two first-selected subbands are respectively from two subbands of two different B P, are followed successively by (BP 1, BP 2), (BP 3, BP 4).In addition, other compound mode that may specify can also be adopted.
According to an execution mode, method of the present invention is further comprising the steps of: adopt LTER10PUCCHFormat3 (LTE version 10, PUCCH format 3) to transmit the bit sequence be made up of respective subband CQI or PMI and the subband label of two first-selected subbands.
According to an execution mode, in the method for the invention, report that the respective subband CQI of two first-selected subbands and/or subband PMI comprises:
The bit sequence be made up of respective subband CQI or PMI and the subband label of selected two first-selected subbands is carried out two RM coding, and through discrete Fourier transform expansion OFDM DFT-S-OFDM transmission after QPSK modulation.
According to an embodiment of the invention, the present invention also provides a kind of method obtaining channel condition information, and wherein, system bandwidth is divided at least two subbands, said method comprising the steps of:
Enode b eNB configures the parameter required for the moment of period 1 and setting; The described period 1 indicates the report moment of PMI for the broadband channel quality instruction CQI and/or broadband pre-coding matrix determining UE, and the moment of described setting is for determining that UE reports the moment of two first-selected subband CQI and/or subband PMI;
The broadband CQI that the reception UE that eNB determined based on the period 1 reports and/or broadband P MI, and based on the respective subband CQI of two first-selected subbands reporting of reception UE of setting and/or subband PMI.The parameter of described period 1 required for the described dispensing unit configuration period 1 is determined; The parameter of moment required for the moment of described dispensing unit configuration setting of described setting is determined;
According to an execution mode, the time at intervals of the setting that the parameter required for moment that described eNB configuration sets is determined is fixed as second round, and described second round is hN pd, wherein N pdfor the cycle in units of subframe, described h be more than or equal to 1 integer.
According to an execution mode, comprise eNB further and sent the parameter determining described Npd for UE by high-level signaling to UE.
According to an execution mode, the described period 1 is HNpd, and wherein Npd is the cycle in units of subframe, and H is integer.Comprise further: eNB sends the parameter determining described Npd and/or H for UE to UE by high-level signaling.
According to an execution mode, the value of H is:
H=JK+1, or
or
wherein, J is the number of portions of bandwidth BP, and parameter K is configured by high-level signaling, and wherein, expression is not less than smallest positive integral, expression is not more than maximum integer.
According to an execution mode, further, for UE, eNB determines that the parameter of described H is parameter K to UE transmission by high-level signaling.
According to an embodiment of the invention, the present invention also provides a kind of device of feeding back channel state information, wherein, system bandwidth is divided at least two subbands, described device comprises: wide-band-message reporting unit, sub-band information reporting unit and transmitting element, wherein
Described wide-band-message reporting unit is for obtaining broadband channel quality instruction CQI and/or broadband pre-coding matrix instruction PMI, and the report moment determined according to the period 1, described broadband CQI and/or described broadband P MI is supplied to described transmitting element,
Described sub-band information reporting unit is used for UE and selects two first-selected subbands, obtain the respective subband CQI of described two first-selected subbands and/or subband PMI, and the report moment set between the moment is reported at broadband CQI described in two continuous print and/or described broadband P MI, the respective subband CQI of described two first-selected subbands and/or subband PMI is supplied to described transmitting element, and
Described transmitting element sends above-mentioned broadband CQI and/or broadband P MI or subband CQI and/or subband PMI.
According to an embodiment of the invention, the present invention also provides a kind of device obtaining channel condition information, and wherein, system bandwidth is divided at least two subbands, and described device comprises:
Dispensing unit, for configuring the parameter in the moment of period 1 and setting; The described period 1 indicates the report moment of PMI for the broadband channel quality instruction CQI and/or broadband pre-coding matrix determining UE, and the moment of described setting is for determining that UE reports the moment of two first-selected subband CQI and/or subband PMI;
Receiving element, the broadband CQI that the reception UE for determining based on the period 1 reports and/or broadband P MI, and based on the respective subband CQI of two first-selected subbands reporting of reception UE of setting and/or subband PMI.
Further, the time at intervals of the setting that the parameter required for the moment of the setting of described dispensing unit configuration is determined is fixed as second round, and described second round is hN pd, wherein N pdfor the cycle in units of subframe, described h be more than or equal to 1 integer;
Described dispensing unit comprises further:
Transmitting element, determines described N for being used for UE by high-level signaling to UE transmission pdparameter.
Further, the parameter required for the period 1 of described dispensing unit configuration is used for determining that the period 1 is HN pd, wherein N pdfor the cycle in units of subframe, H is integer;
Described dispensing unit comprises further:
Transmitting element, determines described N for being used for UE by high-level signaling to UE transmission pdand/or the parameter of H.
Further, described system bandwidth is divided at least one portions of bandwidth BP, and each of at least one BP described comprises subband described at least one; Described dispensing unit is further used for the value determining described H according to following formula:
H=JK+1, or
or
Wherein, J is the number of portions of bandwidth BP, and parameter K is configured by high-level signaling, and wherein, expression is not less than smallest positive integral, expression is not more than maximum integer;
Described transmitting element send for determining that the parameter of described H is described parameter K.
According to the embodiment of the present invention, two first-selected subbands can be selected and the subband CQI fed back in a report subframe on each first-selected subband and/or subband PMI from a BP, thus more subband CQI or subband PMI information on this BP can be provided, be conducive to realizing timely selection scheduling or link circuit self-adapting frequently.
According to the embodiment of the present invention, can feed back respectively from subband CQI and/or the subband PMI of two first-selected subbands of two BP in a report subframe, thus the subband CQI on more BP and/or subband PMI information can be provided in time, be conducive to realizing timely selection scheduling or rapid link self adaptation frequently.
According to the embodiment of the present invention, the report cycle of broadband CQI or broadband P MI can be set neatly, make broadband CQI and/or broadband P MI can the current channel condition of self adaptation, thus the feedback accuracy avoiding time delay to cause declines.
Accompanying drawing explanation
Figure 1 shows that the schematic diagram of the granularity of existing feeding back channel state information.
Figure 2 shows that the schematic diagram of existing feedback broadband CSI and subband CSI, illustrate the state of PUCCH pattern 2-0.
Figure 3 shows that the flow chart of the method for the feeding back channel state information according to an embodiment of the invention.
Figure 4 shows that according to the two RM coding of the employing of an embodiment of the invention, through schematic diagram that DFT-S-OFDM (discrete Fourier transform expansion OFDM) transmits after QPSK tune.
Figure 5 shows that the flow chart of the method for the acquisition channel condition information according to an embodiment of the invention.
Figure 6 shows that the structural representation of the device of feeding back channel state information according to an embodiment of the invention.
Figure 7 shows that according to the two RM coding of the employing of an embodiment of the invention, through the structural representation of the transmitting element of DFT-S-OFDM transmission after QPSK tune.
Figure 8 shows that the structural representation of the device obtaining channel condition information according to an embodiment of the invention.
Embodiment
In order to be illustrated more clearly in the technical scheme of the specific embodiment of the present invention, below the accompanying drawing used the specific embodiment of the present invention is briefly described.But following accompanying drawing is some embodiments of the present invention, and it will be apparent to one skilled in the art that under the prerequisite not paying creative work, can also obtain other execution mode according to these accompanying drawings.
Fig. 3 is the flow chart of the method for the feeding back channel state information of an embodiment of the invention.Described system bandwidth is divided at least two subbands, and described system bandwidth is divided at least one portions of bandwidth BP, and wherein each BP comprises at least one subband.Described method comprises:
Step 301:UE obtains broadband CQI and/or selects broadband P MI, and the report moment report broadband CQI and/or broadband P MI determined according to the period 1.
Step 302:UE selects two subbands (being called " first-selected subband "), obtain the respective subband CQI of described two first-selected subbands and/or subband PMI, report the respective subband CQI of described two the first-selected subbands of report moment report that set between subframe and/or subband PMI at two continuous print broadband CQI and/or broadband P MI.
In above-mentioned steps 301, particularly, UE supposition when selecting broadband P MI is transmitted in whole system bandwidth.The selection of above-mentioned broadband P MI can calculate based on the RI reported recently before this or preassigned RI calculates.In addition, the selection of above-mentioned broadband P MI also can calculate based on maximum capacity or other criterion such as throughput-maximized.
In addition, UE can calculate broadband CQI, and this broadband CQI reflects the transmission in whole system bandwidth.Further, this broadband CQI calculates and can calculate based on RI and/or PMI obtained recently.
In addition, in above-mentioned steps 301, the above-mentioned period 1 can be HN pd, that is, UE is with cycle H N pdreport described broadband CQI or broadband P MI.Wherein N pdfor the cycle in units of subframe that the parameter notified based on high-level signaling is determined, H is the integer based on the definition of high-level signaling parameter.
More specifically, H can be
H=JK+1, or
or
wherein, J is the number of BP, the parameter that parameter K is configured by high-level signaling, expression is not less than smallest positive integral, be not more than maximum integer.
Further, UE is according to cycle H N pd, utilize the subframe meeting the condition of following equation 1 to report described broadband CQI or broadband P MI:
(equation 1)
Wherein, n ffor frame number, n sfor time slot (slot) number, N oFFSET, CQIfor the parameter notified based on high-level signaling obtains side-play amount, mod (x) represents that mould x operates.In addition, the N in equation 1 oFFSET, CQIalso can arrange in addition according to actual conditions.
In addition, in above-mentioned steps 302, the report time at intervals of described setting can be fixed as hN pd, be referred to as second round, wherein h can for the integer being more than or equal to 1.In a preferred embodiment, h=1; Particularly, report that between the moment, UE is according to N second round at two continuous print broadband CQI or broadband P MI pd, select one or two first-selected subbands and report the respective subband CQI of one or two first-selected subbands described or subband PMI and subband label in the report moment of setting.
More specifically, the report moment of described setting can be reported between subframe at two continuous print broadband CQI or broadband P MI and be met the subframe of the condition of following equation 2:
(equation 2)
In addition, described two the first-selected subbands selected by UE can be from two subbands of same BP or respectively from two subbands of different B P; Particularly, during two subband of described two first-selected subbands from same BP, report between subframe at two continuous print broadband CQI or broadband P MI, can according to increasing from BP 0to BP j-1order, travel through each BP successively, go round and begin again.Such as, for 5 BP, BP is followed successively by 0, BP 1, BP 2, BP 3, BP 4, BP 0, BP 1, BP 2Again such as, for 4 BP, BP is followed successively by 0, BP 1, BP 2, BP 3, BP 0, BP 1, BP 2
In addition, described two the first-selected subbands selected by UE also can be the first-selected subbands selected respectively from two different BP.Two subbands can be respectively from BP jand BP (j+1) mod (J)the first-selected subband of middle selection, namely one of them subband is from BP j, another subband is from BP (j+1) mod (J), wherein j and (j+1) mod (J) is the index of BP.Such as, for 5 BP, (BP is followed successively by 0, BP 1), (BP 2, BP 3), (BP 4, BP 0), (BP 1, BP 2) ...Again such as, for 4 BP, (BP is followed successively by 0, BP 1), (BP 2, BP 3), (BP 0, BP 1), (BP 2, BP 3) ...
In addition, described two the first-selected subbands selected by UE can be the report moment at least defined at one, and described two first-selected subbands are two subbands from same BP; And in the report moment at least defined at one, described two first-selected subbands are respectively from two subbands of two different B P.Such as, for 5 BP, two first-selected subbands can be respectively from two subbands of two different B P, are followed successively by (BP 0, BP 1), (BP 2, BP 3), described two first-selected subbands are from same BP, i.e. BP 4two subbands.Again such as, described two first-selected subbands can be from same BP, i.e. BP 0two subbands, and two first-selected subbands be respectively from two subbands of two different B P, namely successively from (BP 1, BP 2), (BP 3, BP 4) two subbands.Certainly, other compound mode that may specify can also be adopted.
In addition, the report moment at least defined at one, select a first-selected subband and report subband CQI and/or the subband PMI of described first-selected subband, and in the report moment at least defined at one, select two first-selected subbands and report the respective subband CQI of described two first-selected subbands and/or subband PMI.Such as, for 5 BP, two first-selected subbands can be respectively from two subbands of two different B P, are followed successively by (BP 0, BP 1), (BP 2, BP 3), a described first-selected subband is from BP 4.Again such as, a described first-selected subband is BP 0, two first-selected subbands can be respectively from two subbands of two different B P, are followed successively by (BP 1, BP 2), (BP 3, BP 4).Certainly, other compound mode that may specify can also be adopted.
In addition, UE select subband PMI time, assuming that only transmit on selected first-selected subband.The selection of described subband PMI can calculate based on the RI reported recently before this or calculate according to preassigned RI.In addition, the selection of described subband PMI can calculate based on maximum capacity or other criterion such as throughput-maximized.
In addition, UE can calculate subband CQI, and this subband CQI is only reflected in the transmission on selected first-selected subband.Further, this subband CQI calculates and can calculate based on the RI obtained recently and/or subband PMI.
In addition, the bit sequence that respective subband CQI or PMI of two first-selected subbands selected by UE and subband label are formed can adopt LTER10PUCCHFormat3 (LTE version 10, PUCCH format 3) to transmit; Or, adopt two RM coding, transmit through DFT-S-OFDM (discrete Fourier transform expansion OFDM) after QPSK tune.
Particularly, as mentioned above, UE utilizes the subframe meeting above-mentioned condition to report CQI or PMI that two first-selected subbands are corresponding.The bit sequence be made up of subband CQI and/or PMI and the subband label of above-mentioned two first-selected subbands can adopt two RM coding and after QPSK adjusts, transmit through DFT-S-OFDM.As shown in Figure 4, concrete steps are as follows:
1) bit sequence be made up of two subband CQI and/or PMI that will transmit and subband label is divided into two parts, Part I comprises bit, Part II comprises bit, wherein N is total bit number of the bit sequence that will transmit;
2) to by above-mentioned steps 1) every part of obtaining adopts (32, O) RM (Reed-Muller) code coding generation 32 bits, and then 8 of end bits are removed and obtain 24 coded-bits;
3) to by step 2) coded-bit of every part that obtains carries out QPSK modulation, and each part obtains 12 QPSK modulation symbols;
4) alternately choose with by step 3) the corresponding QPSK modulation symbol of two parts of obtaining, obtain 24 QPSK modulation symbols, described 24 modulation symbols be sequentially mapped on two time slots and transmit.
Figure 5 shows that the flow chart of the method for the acquisition channel condition information according to an embodiment of the invention.Wherein, system bandwidth is divided at least two subbands.Method according to the acquisition channel condition information of the present embodiment comprises the following steps:
Step 501: enode b eNB configures the parameter required for the moment of period 1 and setting; The described period 1 indicates the report moment of PMI for the broadband channel quality instruction CQI and/or broadband pre-coding matrix determining UE, and the moment of described setting is for determining that UE reports the moment of two first-selected subband CQI and/or subband PMI.
The broadband CQI of UE that step 502:eNB determined based on the period 1 and/or the report moment of broadband P MI, receive described broadband CQI and/or broadband P MI;
Step 503:eNB reports the report moment set between the moment based on broadband CQI described in two continuous print and/or described broadband P MI, receive the respective subband CQI of two first-selected subbands that UE reports and/or subband PMI.
The report time at intervals of described setting can be fixed as second round, and described second round is hN pd, wherein N pdfor the cycle in units of subframe, described h be more than or equal to 1 integer.
Described method can comprise further: be used for UE by high-level signaling to UE transmission and determine described N pdparameter.
The described period 1 can be HN pd, wherein N pdfor the cycle in units of subframe, H is integer;
Described method can comprise further: sent the parameter determining described H for UE to UE by high-level signaling.
If described system bandwidth is divided at least one portions of bandwidth BP, each of at least one BP described comprises subband described at least one; The value of described H can be:
H=JK+1, or
or
Wherein, J is the number of portions of bandwidth BP, and parameter K is the parameter that eNB is arranged, and wherein, expression is not less than smallest positive integral, expression is not more than maximum integer.
Described sent to UE by high-level signaling determine that the parameter of described H is described parameter K for UE.
Above by the parameter that high-level signaling sends, be the parameter of the semi-static configuration of eNB, the cycle of the cycle of broadband P MI or CQI or subband PMI or CQI can be reported to have the longer time than UE.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in a computer read/write memory medium, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
Fig. 6 is the structural representation of the device of feeding back channel state information according to an embodiment of the invention.
The device 600 of the feeding back channel state information of Fig. 6 comprises: wide-band-message reporting unit 601, sub-band information reporting unit 602 and transmitting element 603.
Wide-band-message reporting unit 601 obtains broadband CQI and/or selects broadband P MI, and reports broadband CQI and/or broadband P MI according to the report moment that the period 1 is determined.
In addition, sub-band information reporting unit 602 selects two subbands (being called " first-selected subband "), obtain the respective subband CQI of described two first-selected subbands and/or subband PMI, report the report moment set between subframe at two continuous print broadband CQI and/or broadband P MI, report the respective subband CQI of described two first-selected subbands and/or subband PMI.
Transmitting element 603 sends above-mentioned broadband CQI and/or broadband P MI and subband CQI and/or subband PMI.
Particularly, wide-band-message reporting unit 601 supposition when selecting broadband P MI is transmitted in whole system bandwidth.The selection of above-mentioned broadband P MI can calculate based on the RI reported recently before this or preassigned RI calculates.In addition, the selection of above-mentioned broadband P MI also can calculate based on maximum capacity or other criterion such as throughput-maximized.
In addition, wide-band-message reporting unit 601 can calculate broadband CQI, and this broadband CQI reflects the transmission in whole system bandwidth.Further, this broadband CQI calculates and can calculate based on RI and/or PMI obtained recently.
In addition, in wide-band-message reporting unit 601, the above-mentioned period 1 can be HN pd, that is, UE is with cycle H N pdreport described broadband CQI or broadband P MI.Wherein N pdfor the cycle in units of subframe that the parameter notified based on high-level signaling is determined, H is the integer based on the definition of high-level signaling parameter.
More specifically, H can be
H=JK+1, wherein, J is the number of BP, and parameter K is configured by high-level signaling, is the wheel number in traversal BP full cycle; Or
wherein, J is the number of BP, and parameter K is configured by high-level signaling, is the wheel number in traversal BP full cycle, and wherein, expression is not less than smallest positive integral; Or
wherein, J is the number of BP, and parameter K is configured by high-level signaling, is the wheel number in traversal BP full cycle, and wherein, be not more than maximum integer.
Further, UE is according to cycle H N pd, utilize the subframe meeting the condition of following equation 1 to report described broadband CQI or broadband P MI:
(equation 1)
Wherein, n ffor frame number, n sfor time slot (slot) number, N oFFSET, CQIfor the parameter notified based on high-level signaling obtains side-play amount, mod (x) represents that mould x operates.In addition, the N in equation 1 oFFSET, CQIalso can arrange in addition according to actual conditions.
In addition, in sub-band information reporting unit 602, the report time at intervals of described setting can be fixed as hN pd, be referred to as second round, wherein h be more than or equal to 1 integer.In a preferred embodiment, h=1; Particularly, report that between subframe, sub-band information reporting unit 602 is according to N second round at two continuous print broadband CQI or broadband P MI pd, report the respective subband CQI of described two first-selected subbands or subband PMI and subband label.
More specifically, report moment of described setting can be reported between subframe at two continuous print broadband CQI or broadband P MI and be met the subframe of the condition of following equation 2:
(equation 2)
In addition, described two first-selected subbands selected by sub-band information reporting unit 602 can be from two subbands of same BP or respectively from two subbands of different B P, particularly, during two subband of described two first-selected subbands from same BP, report between subframe at two continuous print broadband CQI or broadband P MI, can according to increasing from BP 0to BP j-1order, travel through each BP successively, and report in each subframe meeting above-mentioned equation 2 successively, go round and begin again.
In addition, described two the first-selected subbands selected by sub-band information reporting unit 602 also can be the first-selected subbands selected respectively from two different BP.Particularly, two subbands can be respectively from BP jand BP (j+1) mod (J)the first-selected subband of middle selection, namely one of them subband is from BP j, another subband is from BP (j+1) mod (J), wherein j and (j+1) mod (J) is the index of BP.Such as, for 5 BP, (BP can be followed successively by 0, BP 1), (BP 2, BP 3), (BP 4, BP 0), (BP 1, BP 2) ...Again such as, for 4 BP, (BP can be followed successively by 0, BP 1), (BP 2, BP 3), (BP 0, BP 1), (BP 2, BP 3) ...
In addition, described two the first-selected subbands selected by UE can be the report moment at least defined at one, and described two first-selected subbands are two subbands from same BP; And in the report moment at least defined at one, described two first-selected subbands are respectively from two subbands of two different B P.Such as, for 5 BP, two first-selected subbands can be respectively from two subbands of two different B P, are followed successively by (BP 0, BP 1), (BP 2, BP 3), described two first-selected subbands can be from same BP, i.e. BP 4two subbands.Again such as, described two first-selected subbands are from same BP, i.e. BP 0two subbands, two first-selected subbands are respectively from two subbands of two different B P, are followed successively by (BP 1, BP 2), (BP 3, BP 4).Certainly, other compound mode that may specify can also be adopted.
In addition, the report moment at least defined at one, select a first-selected subband and report subband CQI and/or the subband PMI of described first-selected subband, and in the report moment at least defined at one, select two first-selected subbands and report the respective subband CQI of described two first-selected subbands and/or subband PMI.Such as, for 5 BP, two first-selected subbands can be respectively from two subbands of two different B P, are followed successively by (BP 0, BP 1), (BP 2, BP 3), a described first-selected subband is from BP 4.Again such as, a described first-selected subband can be BP 0, two first-selected subbands are respectively from two subbands of two different B P, are followed successively by (BP 1, BP 2), (BP 3, BP 4).Certainly, other compound mode that may specify can also be adopted.
In addition, sub-band information reporting unit 602 select subband PMI time, assuming that only transmit on selected first-selected subband.The selection of described subband PMI can calculate based on the RI reported recently before this or calculate according to preassigned RI.In addition, the selection of described subband PMI can calculate based on maximum capacity or other criterion such as throughput-maximized.
In addition, sub-band information reporting unit 602 can calculate subband CQI, and this subband CQI is only reflected in the transmission on selected first-selected subband.Further, this subband CQI calculates and can calculate based on the RI obtained recently and/or subband PMI.
In addition, the bit sequence that respective subband CQI or PMI of two first-selected subbands selected by sub-band information reporting unit 602 and subband label are formed can adopt LTER10PUCCHFormat3 (LTE version 10, PUCCH format 3) to transmit; Or, adopt two RM coding, transmit through DFT-S-OFDM (discrete Fourier transform expansion OFDM) after QPSK tune.
Particularly, as mentioned above, sub-band information reporting unit 602 utilizes the subframe meeting above-mentioned condition to report CQI or PMI that two first-selected subbands are corresponding.The bit sequence be made up of subband CQI and/or PMI and the subband label of above-mentioned two first-selected subbands can adopt two RM coding and after QPSK adjusts, transmit through DFT-S-OFDM.Particularly, as shown in Figure 7, sub-band information reporting unit 602 can comprise: sub-band information acquisition unit 6021, subsection part 6022, RM code generating unit 6023, QPSK modulation portion 6024 and time slot mapping portion 6025.
Sub-band information acquisition unit 6021 according to N above-mentioned second round pdthe timing acquisition conformed to two subband CQI and/or PMI, and send the bit sequence be made up of two subband CQI and/or PMI that will transmit and subband label to subsection part 6022.
Subsection part 6022 is divided into the received bit sequence be made up of two subband CQI and/or PMI that will transmit and subband label two parts and is sent to RM code generating unit 6023, and wherein, the Part I of bit sequence comprises bit, Part II comprises bit, wherein N is total bit number of the bit sequence that will transmit.
RM code generating unit 6023 to by above-mentioned bit sequence two parts in each part adopt (32, O) RM code coding generation 32 bits, then remove 8 of end bits and obtain 24 coded-bits and obtained coded-bit is sent to QPSK modulation portion 6024.
The coded-bit of QPSK modulation portion 6024 to the every part being received from RM code generating unit 6023 carries out QPSK modulation, and each part obtains 12 QPSK modulation symbols.
Time slot mapping portion 6025 alternately chooses the QPSK modulation symbol corresponding with the two parts obtained by QPSK modulation portion 6024, obtains 24 QPSK modulation symbols, is sequentially mapped on two time slots by described 24 modulation symbols and transmits.
Figure 8 shows that the structural representation of the device obtaining channel condition information according to an embodiment of the invention.In the present embodiment, system bandwidth is divided at least two subbands.The device 800 of the acquisition channel condition information shown in Fig. 8 comprises dispensing unit 801, receiving element 802.
Dispensing unit 801 is for configuring the parameter in the moment of period 1 and setting; The described period 1 indicates the report moment of PMI for the broadband channel quality instruction CQI and/or broadband pre-coding matrix determining UE, and the moment of described setting is for determining that UE reports the moment of two first-selected subband CQI and/or subband PMI.
The broadband CQI that receiving element 802 reports for the reception UE determined based on the period 1 and/or broadband P MI, and the respective subband CQI of two the first-selected subbands reported based on the reception UE of setting and/or subband PMI.
In above-mentioned transmitting element 801, the above-mentioned period 1 can be HN pd.That is, eNB indicates UE with cycle H N pdreport described broadband CQI or broadband P MI.Wherein N pdfor the cycle in units of subframe, H is determined integer as required.Described dispensing unit comprises further: transmitting element, for being sent the parameter determining described Npd and/or H for UE to UE by high-level signaling.
More specifically, H can be
H=JK+1, wherein, J is the number of BP, and parameter K is integer; Or
wherein, J is the number of BP, and parameter K is integer, and wherein, expression is not less than smallest positive integral; Or
wherein, J is the number of BP, and parameter K is integer, and wherein, be not more than maximum integer.
In addition, described transmitting element send for determining that the parameter of described H can be described parameter K.
In addition, the time at intervals of the setting that the parameter required for the moment of the setting of described dispensing unit configuration is determined is fixed as second round, and described second round can be hN pd, wherein N pdfor the cycle in units of subframe, described h be more than or equal to 1 integer.Further, described dispensing unit can comprise transmitting element, determines described N for being used for UE by high-level signaling to UE transmission pdparameter.
According to embodiments of the invention, two first-selected subbands can be selected and the subband CQI fed back in a report subframe on each first-selected subband and/or subband PMI from a BP, thus more subband CQI or subband PMI information on this BP can be provided, be conducive to realizing timely selection scheduling or link circuit self-adapting frequently.
According to embodiments of the invention, can feed back respectively from subband CQI and/or the subband PMI of two first-selected subbands of two BP in a report subframe, thus the subband CQI on more BP and/or subband PMI information can be provided in time, be conducive to realizing timely selection scheduling or rapid link self adaptation frequently.
According to embodiments of the invention, the report cycle of broadband CQI or broadband P MI can be set neatly, make broadband CQI and/or broadband P MI can the current channel condition of self adaptation, thus the feedback accuracy avoiding time delay to cause declines.
It should be noted that above execution mode and embodiment only for illustrating that the object of technical scheme of the present invention provides, and the present invention is not limited to this.Although with reference to aforesaid execution mode and embodiment to invention has been detailed description, but one skilled in the art will appreciate that and can carry out various amendment to the technical scheme described in each execution mode aforementioned and embodiment or various equivalent replacement be carried out to portion of techniques feature wherein; And carried out the spirit and scope that these amendments or the corresponding technical schemes of replacing do not depart from the technical scheme of each execution mode described in the present invention and embodiment in itself.

Claims (28)

1. a method for feeding back channel state information, wherein, system bandwidth is divided at least two subbands, said method comprising the steps of:
User equipment (UE) obtains broadband channel quality instruction CQI and/or broadband pre-coding matrix instruction PMI, and the report moment determined according to the period 1, report described broadband CQI and/or described broadband P MI; And
Described UE selects two first-selected subbands, obtain the respective subband CQI of described two first-selected subbands and/or subband PMI, report the report moment of a setting between the moment at broadband CQI described in two continuous print and/or described broadband P MI, report the respective subband CQI of described two first-selected subbands and/or subband PMI;
Wherein, the respective subband CQI of described report two first-selected subbands and/or subband PMI comprises:
The bit sequence be made up of respective subband CQI or PMI and the subband label of selected two first-selected subbands is carried out two RM coding, and through discrete Fourier transform expansion OFDM DFT-S-OFDM transmission after QPSK modulation, concrete steps are as follows:
1) bit sequence be made up of two subband CQI and/or PMI that will transmit and subband label is divided into two parts, Part I comprises bit, Part II comprises bit, wherein N is total bit number of the bit sequence that will transmit;
2) to by described step 1) every part of obtaining adopts (32, O) RM (Reed-Muller) code coding generation 32 bits, and 8 of end bits are removed and obtains 24 coded-bits;
3) to by described step 2) coded-bit of every part that obtains carries out QPSK modulation, and each part obtains 12 QPSK modulation symbols;
4) alternately choose with by described step 3) the corresponding QPSK modulation symbol of two parts of obtaining, obtain 24 QPSK modulation symbols, described 24 modulation symbols be sequentially mapped on two time slots and transmit.
2. the method for claim 1, wherein
The interval in the report moment of described setting is fixedly installed as second round, and this second round is hN pd, N pdfor the cycle in units of subframe that the parameter notified based on high-level signaling is determined, described h be more than or equal to 1 integer.
3. method as claimed in claim 1 or 2, wherein,
The described period 1 is HN pd, wherein N pdfor the cycle in units of subframe that the parameter notified based on high-level signaling is determined, H is the integer determined based on high-level signaling parameter.
4. method as claimed in claim 3, wherein, described system bandwidth is divided at least one portions of bandwidth BP, and each of at least one BP described comprises subband described at least one; The value of described H is:
H=JK+1, or
or
wherein, J is the number of portions of bandwidth BP, and parameter K is configured by high-level signaling, and wherein, expression is not less than smallest positive integral, expression is not more than maximum integer.
5. the method for claim 1, wherein described system bandwidth is divided at least one portions of bandwidth BP, and each of at least one BP described comprises subband described at least one;
Described two first-selected subbands are two subbands from same BP;
Or
Two subbands from different B P.
6. method as claimed in claim 5, wherein,
When described two first-selected subbands are two subbands from same BP, the first-selected subband in corresponding different report moment from BP respectively be BP jand BP (j+1) mod (J), wherein j and (j+1) mod (J) is the index of BP, and J is the number of BP;
When described two first-selected subbands are two subbands from different B P, described different B P is respectively BP jand BP (j+1) mod (J), wherein j and (j+1) mod (J) is the index of BP, and J is the number of BP.
7. method as claimed in claim 6, wherein,
Described two first-selected subbands are two subbands from different B P, and in the report moment of described setting, described different B P is respectively BP jand BP (j+1) mod (J)time, in the report moment of the adjacent described setting of the next one, described different B P is respectively BP kand BP (k+1) mod (J), wherein j and k meets relation: k=(j+2) mod (J).
8. the method for claim 1, wherein described system bandwidth is divided at least one portions of bandwidth BP, and each of at least one BP described comprises subband described at least one;
At least in the report moment of a described setting, described two first-selected subbands are two subbands from same BP; And at least in the report moment of a described setting, described two first-selected subbands are respectively from two subbands of two different B P.
9. the method for claim 1, wherein
At least in the report moment of a described setting, select a first-selected subband and report subband CQI and/or the subband PMI of described first-selected subband, and at least in the report moment of a described setting, select two first-selected subbands and report the respective subband CQI of described two first-selected subbands and/or subband PMI.
10. method as claimed in claim 9, wherein, described system bandwidth is divided at least one portions of bandwidth BP, and each of at least one BP described comprises subband described at least one;
Two first-selected subbands of described selection are respectively from BP jand BP (j+1) mod (J)the first-selected subband of middle selection, wherein j and (j+1) mod (J) is the index of BP, and J is the number of BP; Described selection first-selected subband is from BP 0or BP j-1, or from the BP set jthe first-selected subband of middle selection.
11. 1 kinds of methods obtaining channel condition information, wherein, system bandwidth is divided at least two subbands, said method comprising the steps of:
The broadband channel quality instruction CQI of enode b eNB based on the UE determined according to period 1 parameter and/or the report moment of broadband pre-coding matrix instruction PMI, receive described broadband CQI and/or broadband P MI; And
Based on the report moment of reporting a setting between the moment at broadband CQI described in two continuous print and/or described broadband P MI, receive the respective subband CQI of two first-selected subbands that UE reports and/or subband PMI;
Wherein, the respective subband CQI of described two first-selected subbands reporting of reception UE and/or subband PMI comprises:
The bit sequence be made up of respective subband CQI or PMI and the subband label of selected two first-selected subbands is carried out two RM coding, and through discrete Fourier transform expansion OFDM DFT-S-OFDM transmission after QPSK modulation, concrete steps are as follows:
1) bit sequence be made up of two subband CQI and/or PMI that will transmit and subband label is divided into two parts, Part I comprises bit, Part II comprises bit, wherein N is total bit number of the bit sequence that will transmit;
2) to by described step 1) every part of obtaining adopts (32, O) RM (Reed-Muller) code coding generation 32 bits, and 8 of end bits are removed and obtains 24 coded-bits;
3) to by described step 2) coded-bit of every part that obtains carries out QPSK modulation, and each part obtains 12 QPSK modulation symbols;
4) alternately choose with by described step 3) the corresponding QPSK modulation symbol of two parts of obtaining, obtain 24 QPSK modulation symbols, described 24 modulation symbols be sequentially mapped on two time slots and transmit.
12. methods according to claim 11, wherein, the report time at intervals of described setting is fixed as second round,
Described second round is hN pd, wherein N pdfor the cycle in units of subframe, described h be more than or equal to 1 integer;
Described method comprises further: be used for UE by high-level signaling to UE transmission and determine described N pdparameter.
13. methods as described in claim 11 or 12, wherein,
The described period 1 is HN pd, wherein N pdfor the cycle in units of subframe, H is integer;
Described method comprises further: sent the parameter determining described H for UE to UE by high-level signaling.
14. methods as claimed in claim 13, wherein, described system bandwidth is divided at least one portions of bandwidth BP, and each of at least one BP described comprises subband described at least one; The value of described H is:
H=JK+1, or
or
wherein, J is the number of portions of bandwidth BP, and parameter K is the parameter of eNB configuration, and wherein, expression is not less than smallest positive integral, expression is not more than maximum integer;
Described by high-level signaling to UE send be used for UE determine that the parameter of described H is described parameter K.
The device of 15. 1 kinds of feeding back channel state informations, wherein, system bandwidth is divided at least two subbands, and described device comprises: wide-band-message reporting unit, sub-band information reporting unit and transmitting element, wherein,
Described wide-band-message reporting unit is for obtaining broadband channel quality instruction CQI and/or broadband pre-coding matrix instruction PMI, and the report moment determined according to the period 1, described broadband CQI and/or described broadband P MI is supplied to described transmitting element,
Described sub-band information reporting unit is used for UE and selects two first-selected subbands, obtain the respective subband CQI of described two first-selected subbands and/or subband PMI, and report that the respective subband CQI of described two first-selected subbands and/or subband PMI is supplied to described transmitting element by the report moment of a setting between the moment at broadband CQI described in two continuous print and/or described broadband P MI, and
Described transmitting element sends above-mentioned broadband CQI and/or broadband P MI or subband CQI and/or subband PMI;
Wherein, described transmitting element is also for carrying out two RM coding by the bit sequence be made up of respective subband CQI or PMI and the subband label of selected two first-selected subbands, and send through discrete Fourier transform expansion OFDM DFT-S-OFDM after QPSK modulation, concrete steps are as follows:
1) bit sequence be made up of two subband CQI and/or PMI that will transmit and subband label is divided into two parts, Part I comprises bit, Part II comprises bit, wherein N is total bit number of the bit sequence that will transmit;
2) to by described step 1) every part of obtaining adopts (32, O) RM (Reed-Muller) code coding generation 32 bits, and 8 of end bits are removed and obtains 24 coded-bits;
3) to by described step 2) coded-bit of every part that obtains carries out QPSK modulation, and each part obtains 12 QPSK modulation symbols;
4) alternately choose with by described step 3) the corresponding QPSK modulation symbol of two parts of obtaining, obtain 24 QPSK modulation symbols, described 24 modulation symbols be sequentially mapped on two time slots and transmit.
16. devices as claimed in claim 15, wherein,
In described sub-band information reporting unit, the interval in the report moment of described setting is fixedly installed as second round, and described second round is hN pd, N pdfor the cycle in units of subframe that the parameter notified based on high-level signaling is determined, described h be more than or equal to 1 integer.
17. devices as described in claim 15 or 16, wherein,
In described wide-band-message reporting unit, the described period 1 is HN pd, wherein N pdfor the cycle in units of subframe that the parameter notified based on high-level signaling is determined, H is the integer determined based on high-level signaling parameter.
18. devices as claimed in claim 17, wherein, described system bandwidth is divided at least one portions of bandwidth BP, and each of at least one BP described comprises subband described at least one; In described wide-band-message reporting unit, the value of described H is:
H=JK+1, or
or
wherein, J is the number of portions of bandwidth BP, and parameter K is configured by high-level signaling, and wherein, expression is not less than smallest positive integral, expression is not more than maximum integer.
19. devices as claimed in claim 15, wherein,
Described system bandwidth is divided at least one portions of bandwidth BP, and each of at least one BP described comprises subband described at least one;
In described sub-band information reporting unit, described two first-selected subbands are two subbands from same BP or two subbands from different B P.
20. devices as claimed in claim 19, wherein, in described sub-band information reporting unit,
When described two first-selected subbands are two subbands from same BP, the first-selected subband in corresponding different report moment from BP respectively be BP jand BP (j+1) mod (J), wherein j and (j+1) mod (J) is the index of BP, and J is the number of BP;
When described two first-selected subbands are two subbands from different B P, described different B P is respectively BP jand BP (j+1) mod (J), wherein j and (j+1) mod (J) is the index of BP, and J is the number of BP.
21. devices as claimed in claim 20, wherein, in described sub-band information reporting unit,
Described two first-selected subbands are two subbands from different B P, and in the report moment of described setting, described different B P is respectively BP jand BP (j+1) mod (J)time, in the report moment of the adjacent described setting of the next one, described different B P is respectively BP kand BP (k+1) mod (J), wherein j and k meets relation: k=(j+2) mod (J).
22. devices as claimed in claim 15, wherein, described system bandwidth is divided at least one portions of bandwidth BP, and each of at least one BP described comprises subband described at least one; In described sub-band information reporting unit,
At least in the report moment of a described setting, described two first-selected subbands are two subbands from same BP; And at least in the report moment of a described setting, described two first-selected subbands are respectively from two subbands of two different B P.
23. devices as claimed in claim 15, wherein, in described sub-band information reporting unit,
At least in the report moment of a described setting, select a first-selected subband and report subband CQI and/or the subband PMI of described first-selected subband, and at least in the report moment of a described setting, select two first-selected subbands and report the respective subband CQI of described two first-selected subbands and/or subband PMI.
24. devices as claimed in claim 23, wherein, described system bandwidth is divided at least one portions of bandwidth BP, and each of at least one BP described comprises subband described at least one; In described sub-band information reporting unit,
Two first-selected subbands of described selection are respectively from BP jand BP (j+1) mod (J)the first-selected subband of middle selection, wherein j and (j+1) mod (J) is the index of BP, and J is the number of BP; Described selection first-selected subband is from BP 0or BP j-1, or from the BP set jthe first-selected subband of middle selection.
25. 1 kinds of devices obtaining channel condition information, wherein, system bandwidth is divided at least two subbands, and described device comprises:
Dispensing unit, for configuring the parameter in the moment of period 1 and setting; The described period 1 indicates the report moment of PMI for the broadband channel quality instruction CQI and/or broadband pre-coding matrix determining UE, and the moment of described setting is for determining that UE reports the moment of two first-selected subband CQI and/or subband PMI;
Receiving element, the broadband CQI that the reception UE for determining based on the period 1 reports and/or broadband P MI, and based on the respective subband CQI of two first-selected subbands reporting of reception UE of a setting and/or subband PMI;
Wherein, described receiving element is also for carrying out two RM coding by the bit sequence be made up of respective subband CQI or PMI and the subband label of selected two first-selected subbands, and send through discrete Fourier transform expansion OFDM DFT-S-OFDM after QPSK modulation, concrete steps are as follows:
1) bit sequence be made up of two subband CQI and/or PMI that will transmit and subband label is divided into two parts, Part I comprises bit, Part II comprises bit, wherein N is total bit number of the bit sequence that will transmit;
2) to by described step 1) every part of obtaining adopts (32, O) RM (Reed-Muller) code coding generation 32 bits, and 8 of end bits are removed and obtains 24 coded-bits;
3) to by described step 2) coded-bit of every part that obtains carries out QPSK modulation, and each part obtains 12 QPSK modulation symbols;
4) alternately choose with by described step 3) the corresponding QPSK modulation symbol of two parts of obtaining, obtain 24 QPSK modulation symbols, described 24 modulation symbols be sequentially mapped on two time slots and transmit.
26. devices as claimed in claim 25, wherein, the time at intervals of the setting that the parameter required for the moment of the setting of described dispensing unit configuration is determined is fixed as second round, and described second round is hN pd, wherein N pdfor the cycle in units of subframe, described h be more than or equal to 1 integer;
Described device comprises further:
Transmitting element, determines described N for being used for UE by high-level signaling to UE transmission pdparameter.
27. devices as claimed in claim 25, wherein, the parameter required for the period 1 of described dispensing unit configuration is used for determining that the period 1 is HN pd, wherein N pdfor the cycle in units of subframe, H is integer;
Described device comprises further:
Transmitting element, determines described N for being used for UE by high-level signaling to UE transmission pdand/or the parameter of H.
28. devices as claimed in claim 27, wherein, described system bandwidth is divided at least one portions of bandwidth BP, and each of at least one BP described comprises subband described at least one; Described dispensing unit is further used for the value determining described H according to following formula:
H=JK+1, or
or
Wherein, J is the number of portions of bandwidth BP, and parameter K is configured by high-level signaling, and wherein, expression is not less than smallest positive integral, expression is not more than maximum integer;
Described transmitting element send for determining that the parameter of described H is described parameter K.
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