CN102916785A - Information feedback method, user equipment and base station - Google Patents
Information feedback method, user equipment and base station Download PDFInfo
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- CN102916785A CN102916785A CN2011103619749A CN201110361974A CN102916785A CN 102916785 A CN102916785 A CN 102916785A CN 2011103619749 A CN2011103619749 A CN 2011103619749A CN 201110361974 A CN201110361974 A CN 201110361974A CN 102916785 A CN102916785 A CN 102916785A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
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Abstract
The embodiment of the invention discloses an information feedback method, user equipment and a base station. The method comprises the following steps of: receiving a control signaling sent by the base station, wherein the control signaling carries feedback indication information of an expanded physical downlink control channel (E-PDCCH); and feeding back channel state information (CSI) of the E-PDCCH to the base station on a corresponding subframe according to the feedback indication information. The user equipment comprises a first receiving module and a feedback module. The base station comprises a sending module and a second receiving module. According to the embodiment of the invention, the performance of the E-PDCCH be improved.
Description
Technical field
The embodiment of the invention relates to the communication technology, relates in particular to a kind of information feedback method, subscriber equipment and base station.
Background technology
In wireless communication system, link adaptation techniques and multi-emitting receive (Multiple-input and Multiple-output more; Hereinafter to be referred as: the MIMO) data throughout of the remarkable elevator system of technology energy.Link adaptation techniques is according to channel quality indication (the Channel Quality Indicator of receiving terminal feedback; Hereinafter to be referred as: CQI) dynamically adjust modulation system and code rate, so that system increases message transmission rate under the prerequisite that satisfies certain detection performance; Mimo system all adopts many antennas than traditional a single aerial system at transmitting-receiving two-end.Mimo system sends a plurality of independently data flow by space multiplexing technique and promotes message transmission rate, and independently the data flow number is called order (rank).Long Term Evolution (Long Term Evolution; Hereinafter to be referred as: LTE) system definition come the performance of elevator system based on the transmission mode of Closed-Loop Spatial Multiplexing, Closed-Loop Spatial Multiplexing has adopted the precoding technique based on code book, namely design in advance a code book that comprises all possible pre-coding matrix, pre-coding matrix can be indicated with an index of code book, is referred to as pre-coding matrix indication (Precoding Matrix Indicator; Hereinafter to be referred as: PMI).Subscriber equipment (User Equipment; Hereinafter to be referred as: UE) estimate descending mimo channel based on downlink reference signal, and determine optimum order, pre-coding matrix and channel quality information based on this channel estimating, and the order that its difference is corresponding indication (Rank Indicator; Hereinafter to be referred as: RI), PMI and CQI feed back to the base station, the feedback of RI, PMI and CQI is referred to as the CSI feedback.The concrete feedback content of UE depends on transmission mode, and for example PMI only just needs feedback under the closed loop transmission pattern.UE may need to feed back PMI simultaneously when feedback CQI, be designated as CQI/PMI.
In the LTE system, the base station also needs by Downlink Control Information (Downlink ControlInformation; Hereinafter to be referred as: DCI) inform that scheduling UE receives the necessary information of signal, such as information such as the frequency resource of distributing and modulation coding modes, DCI is usually at Physical Downlink Control Channel (Physical Downlink Control Channel; Hereinafter to be referred as: PDCCH) upper transmission.In the following evolution of LTE-Advanced, in order further to improve systematic function, need the expense of the DCI of transmission further to increase.Therefore, because the restriction of resource, transmission means and the modulation system of existing PDCCH, its capacity may not satisfy requirement in the future, thus the data throughout of system for restricting.Resource, transmission means and modulation system that the solution of the raising PDCCH capacity that exists at present can be used for expansion PDCCH, namely the distribution portion resource is used for sending DCI on the resource of traditional transmission data, and newly assigned this part resource is called Physical Downlink Control Channel (the Extended Physical Downlink Control Channel of expansion; Hereinafter to be referred as: E-PDCCH).Compare with traditional PDCCH, E-PDCCH can adopt based on demodulated reference signal (Demodulation Reference Signals; Hereinafter to be referred as: precoding technique DM-RS), also can adopt the more modulation system and the rank that increases transmission of high-order, with further raising capacity.
Yet, there is not the CSI feedback for E-PDCCH in the prior art, cause the hydraulic performance decline of E-PDCCH.
Summary of the invention
The embodiment of the invention is to provide a kind of information feedback method, subscriber equipment and base station, improves the performance of E-PDCCH.
To achieve these goals, the embodiment of the invention provides a kind of information feedback method, comprising:
Receive the control signal that the base station issues, carry the feedback indication information for the Physical Downlink Control Channel E-PDCCH of expansion in the described control signal;
According to described feedback indication information on corresponding subframe to the channel condition information CSI of described base station feedback for described E-PDCCH.
The embodiment of the invention provides a kind of information feedback method, comprising:
Send control signaling to subscriber equipment, carry the feedback indication information for the Physical Downlink Control Channel E-PDCCH of expansion in the described control signal;
Receive the channel condition information CSI for described E-PDCCH that described subscriber equipment feeds back in corresponding subframe according to described feedback indication information.
The embodiment of the invention provides a kind of subscriber equipment, comprising:
The first receiver module is used for receiving the control signal that the base station issues, and carries the feedback indication information for the Physical Downlink Control Channel E-PDCCH of expansion in the described control signal;
Feedback module, be used for according to described feedback indication information on corresponding subframe to the channel condition information CSI of described base station feedback for described E-PDCCH.
The embodiment of the invention provides a kind of base station, comprising:
Sending module is used for sending control signaling to subscriber equipment, carries the feedback indication information for the Physical Downlink Control Channel E-PDCCH of expansion in the described control signal;
The second receiver module is used for receiving the channel condition information CSI for described E-PDCCH that described subscriber equipment feeds back in corresponding subframe according to described feedback indication information.
A kind of information feedback method, subscriber equipment and base station that the embodiment of the invention provides, receive the control signal that the base station issues by UE, from control signal, obtain the feedback indication information for E-PDCCH, according to this feedback indication information on corresponding subframe to the CSI of base station feedback for E-PDCCH; Present embodiment has been introduced the CSI feedback for E-PDCCH, thereby has improved rank adaptation performance, precoding performance and the link circuit self-adapting performance of E-PDCCH.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do one to the accompanying drawing of required use in embodiment or the description of the Prior Art and introduce simply, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the flow chart of information feedback method embodiment one of the present invention;
Fig. 2 is the flow chart of information feedback method embodiment two of the present invention;
Fig. 3 is the flow chart of information feedback method embodiment three of the present invention;
Fig. 4 is the flow chart of information feedback method embodiment four of the present invention;
Fig. 5 is the flow chart of information feedback method embodiment five of the present invention;
Fig. 6 is the structure chart of subscriber equipment embodiment one of the present invention;
Fig. 7 is the structure chart of subscriber equipment embodiment two of the present invention;
Fig. 8 is the structure chart of base station embodiment one of the present invention;
Fig. 9 is the structure chart of base station embodiment two of the present invention;
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Fig. 1 is the flow chart of information feedback method embodiment one of the present invention, and as shown in Figure 1, present embodiment provides a kind of information feedback method, and this enforcement specifies technical scheme of the present invention from UE one side, can specifically comprise the steps:
Step 101 receives the control signal that the base station issues, and carries the feedback indication information for the Physical Downlink Control Channel E-PDCCH of expansion in the described control signal.
In the LTE-Advanced system, UE can be to the CSI of base station feedback for E-PDCCH, and UE receives first the control signal that issues from the base station, carries the feedback indication information for E-PDCCH in this control signal.UE can adopt periodic manner feedback CSI, also can adopt the aperiodicity mode to feed back CSI, and the control signal that is specifically issued by the base station decides.When UE adopted periodic manner feedback CSI, the control signal that UE is handed down in the base station was specially Radio Resource control (Radio Resource Control; Hereinafter to be referred as: RRC) signaling, the feedback indication information for E-PDCCH need to be carried in the base station in this RRC signaling, periodic quantity and deviant that the feedback indication information for E-PDCCH that carries in the RRC signaling feeds back for the CSI for E-PDCCH, perhaps, that carries in the RRC signaling is period 1 value and the first deviant for the CQI/PMI feedback of E-PDCCH for the feedback indication information of E-PDCCH, and second week time value and the second deviant fed back for the RI of E-PDCCH.When UE adopted the aperiodicity mode to feed back CSI, the base station was specially descending control signaling to the control signal that UE issues, and the feedback indication information that carry in this descending control signaling the base station is specially CSI feedback request bit.
In the present embodiment, E-PDCCH is than Physical Downlink Shared Channel (Physical Downlink Shared Channel; Hereinafter to be referred as: PDSCH), the CSI of its feedback has extra restriction.For example, in order to guarantee the detection performance of E-PDCCH, the rank of its transmission need to be restricted to a less value, as be set to be less than or equal to 2.Base station and UE arrange first to be designated as n for the rank of the maximum of E-PDCCH, and then RI needs
Individual bit be used for expression rank ∈ 1,2 ..., n}.In addition, also can limit the PMI that feeds back for E-PDCCH.This restriction can only realize with some the specific pre-coding matrixes in the precoding codebook by telling the UE terminal, i.e. codebook subset restriction.For E-PDCCH and PDSCH, can adopt different codebook subset restrictions.The restriction of codebook subset can be notified by RRC signaling or L1 dynamic signaling, and perhaps this restriction can be scheduled to, without any need for signaling.
In addition, can limit the modulation system that E-PDCCH only adopts lower-order, such as quaternary phase keying (Quaternary Phase Shift Keying; Hereinafter to be referred as: QPSK), 16 quadrature amplitude modulation (Quadrature Amplitude Modulation; Hereinafter to be referred as: QAM) etc.Be the subset of PDSCH CQI (as shown in table 1) for the CQI of E-PDCCH this moment, if for example only in the support matrix 1 modulation system be the part of QPSK, then E-PDCCH CQI can be expressed as the 3-bit CQI shown in the table 2; If more for example only in the support matrix 1 modulation system be QPSK and efficency less than or equal to 0.3770 part, then E-PDCCH CQI can be expressed as the 2-bit CQI shown in the table 3.
Table 14-bit PDSCH CQI Table
Table 23-bit E-PDCCH CQI Table
Table 32-bit E-PDCCH CQI Table
And the frequency resource that E-PDCCH takies is by high-rise semi-static configuration, and the frequency resource that PDSCH takies is by the DCI dynamic assignment.
Step 102, according to described feedback indication information on corresponding subframe to the channel condition information CSI of described base station feedback for described E-PDCCH.
UE is at the control signal that receives the base station transmission, and after getting access to the feedback indication information that wherein carries, UE according to this feedback indication information on corresponding subframe to the CSI of base station feedback for E-PDCCH, corresponding subframe is herein specifically determined according to the feedback indication information.CSI in the present embodiment comprises at least a among CQI, PMI and the RI, and based on whole bandwidth or the predetermined bandwidth of part.The predetermined bandwidth of part is namely passed through the continuous or discrete frequency resource of the semi-static configuration of RRC signaling, and can adopt existing PDSCH resource allocation methods is E-PDCCH configuration frequency resource.Wherein, CQI selects to obtain from all CQI index (index) or subset wherein (for example aforementioned table 2 of this subset or table 3), PMI selects to obtain from predefined code book or subset wherein, and RI selects to obtain from all orders or subset wherein.
In the prior art, for different feedback models and different system bandwidths, defined the granularity of the feedback of different PUSCH, and the size of different subbands.Such as the feedback model to PUSCH 3-1, the UE end needs the PMI in a broadband of feedback, needs the CQI of each subband of feedback.Concerning PUSCH3-1, the subband size of feedback CQI is as shown in the table.
The subband size of table 4PUSCH 3-1 pattern
Take system bandwidth as 50 RB as example, in table 4, the subband size of the UE feedback that obtains is 6 RB.In E-PDCCH, (it is 12 subcarriers that a RB is defined as at frequency domain here at a RB, to account for two time slots in time domain, or subframe) on, the number of available subcarrier is about as much as 3 CCE (Control Channel Element, control channel element) on the PDCCH channel.Consider a PDCCH signaling, can according to channel condition, be carried on 1,2,4 or 8 CCE.Such E-PDDCH signaling probably just sends at 1 or 2 RB.Take system bandwidth as 50 RB as example, according to the feedback granularity of PUSCH3-1, the subband size is 6 RB, if at high-frequency channel optionally, and such as the ETU channel, maximum delay the chances are 5us, corresponding correlation bandwidth approximately is 200kHz.A RB is 180kHz at frequency domain.Like this, different RB basically, even adjacent RB, the correlation of its frequency domain is also very low, causes the channel variation of adjacent RB also larger.Like this, even obtained best subband by PUSCH, but owing to E-PDCCH sends at whole subband.Such as, E-PDCCH only accounts for a RB, and the channel quality on this RB might not be fine also, causes the E-PDCCH hydraulic performance decline.Do not dispatched preferably gain.
For above problem, can be for the special feedback granularity of CSI feedback definition of E-PDCCH, this feedback granularity can be by system bandwidth, report the system configuration such as pattern (reporting mode) to determine, static or the semi-static or dynamic-configuration mode notification terminal that also can be sent by the base station.Described semi-static notice can be the high-level signaling notice, and described dynamic notice can be the physical layer signaling notice.The described pattern that reports can be the pattern that reports for PDSCH feedback, and such as PUSCH3-1, PUCCH2-1 etc. also can be the pattern that reports for the special definition of E-PDCCH.
Described CSI feedback granularity for E-PDCCH can be identical with the CSI feedback granularity of PDSCH, and namely subband is big or small, also can be different, and for example the CSI than PDSCH feeds back the less feedback granularity of granularity.Be exemplified below: to the pattern that reports of certain new definition of E-PDCCH, definition feedback granularity is as shown in table 5
The frequency domain granule size of table 5E-PDCCH feedback
Also can, the CSI of corresponding PDSCH reports pattern PUSCH3-1, the feedback granularity of the E-PDCCH that definition is corresponding is as shown in table 6
The frequency domain granule size of table 6E-PDCCH feedback
Perhaps, can utilize CSI corresponding to PDSCH to report pattern, increase extra indication, unite be used to the CSI information that reports E-PDCCH.
For example report among the pattern PUSCH 3-1 at CSI corresponding to PDSCH, when system bandwidth was 50RB, the subband size was 6, can increase extra bit and indicate 1 or several RB best in each subband.For example, best 2 RB in all each subbands of subband indicating; Perhaps at several best best RB of subband indicating, for example, at 2 best RB of 2 best subband indicatings, the CQI that then reports according to PUSCH obtains 2 the highest subbands of CQI.Selecting best several subbands and selecting in the process of best several RB, can be with reference to following system of selection.If need to select best m subband or RB, but there is the CQI of n subband or RB identical and be that best (n＞m), then select m individual according to predefined mode is such as according to selective sequentials such as frequency domain positions, subband index number.
Utilize CSI corresponding to original PDSCH to report pattern, increase again the method for extra indication bit, can be still with CSI corresponding to original PDSCH report PMI that pattern feeds back and (or) information such as CQI, only indicate a best m subband or RB position; Also can feed back separately described best m subband or the corresponding PMI in RB position and (or) information such as CQI, perhaps the modulation system of E-PDCCH is fixed as quarternary phase-shift keying (QPSK) QPSK, need not the CQI indication.
When the feedback indication information was specially the feedback periodic quantity of CSI and deviant, then UE can determine the subframe numbers of periodic feedback CSI according to this periodic quantity and deviant, UE on the subframe of this subframe numbers indication to the CSI of base station feedback for E-PDCCH.Be specially period 1 value and the first deviant of feedback CQI/PMI when the feedback indication information, and when the feedback second week time value of RI and the second deviant, then UE can determine the first subframe numbers of periodic feedback CQI/PMI according to this period 1 value and the first deviant, can determine the second subframe numbers of periodic feedback RI according to second week time value and the second deviant, UE on the subframe of the first subframe numbers indication to the CQI/PMI of base station feedback for E-PDCCH, on the subframe of the second subframe numbers indication to the RI of base station feedback for E-PDCCH.When feedback indication information when being specially CSI feedback request bit, if this CSI feedback request bit is default bit value, then UE directly on the subframe of setting to base station feedback CSI.
In the present embodiment, when periodically occurring in the same subframe for the CSI of E-PDCCH feedback and acyclic CSI feedback for E-PDCCH, can only keep acyclic CSI for E-PDCCH and feed back.When occurring in the same subframe for the CSI of E-PDCCH feedback and CSI feedback for PDCCH, can only keep the CSI feedback for E-PDCCH, to guarantee the performance of E-PDCCH.
In the present embodiment, the particular content of the CSI that feeds back of UE depends on the transmission mode that disposes.When the base station is configured to support multilayer transmission to the downlink transfer pattern of UE, then UE need to feed back RI, and for the transmission mode of not supporting multilayer transmission such as transmit diversity, the RI perseverance is 1, so UE does not need to feed back RI.If transmission mode is closed loop transmission such as Closed-Loop Spatial Multiplexing, then UE need to feed back PMI information; If transmission mode is open-loop transmission such as Open-Loop Spatial Multiplexing, then UE does not need to feed back PMI information.No matter be under which kind of transmission mode, UE needs to feed back CQI so that base station selected transport block size and modulation system.If UE feedback RI and PMI, then the calculating of CQI is based on RI and the PMI that feeds back.PMI and the CQI of UE feedback can reflect channel information broadband (wideband) or subband (subband), and wherein the broadband represents whole frequency resources that system supports, subband then is the component frequency resource by certain rule definition.The PMI of UE feedback subband and CQI information are convenient to the base station and are carried out frequency selective scheduling by subband, thereby obtain larger multi-user diversity gain.
Present embodiment provides a kind of information feedback method, receive the control signal that the base station issues by UE, from control signal, obtain the feedback indication information for E-PDCCH, according to this feedback indication information on corresponding subframe to the CSI of base station feedback for E-PDCCH; Present embodiment has been introduced the CSI feedback for E-PDCCH, thereby has improved rank adaptation performance, precoding performance and the link circuit self-adapting performance of E-PDCCH.
Fig. 2 is the flow chart of information feedback method embodiment two of the present invention, and as shown in Figure 2, present embodiment provides a kind of information feedback method, and one side specifies technical scheme of the present invention from the base station in this enforcement, can specifically comprise the steps:
Step 201 sends control signaling to subscriber equipment, carries the feedback indication information for the Physical Downlink Control Channel E-PDCCH of expansion in the described control signal.
In the present embodiment, the base station can be specially the RRC signaling to the control signal that UE issues, the feedback indication information for E-PDCCH need to be carried in the base station in this RRC signaling, periodic quantity and deviant that the feedback indication information for E-PDCCH that carries in the RRC signaling feeds back for the CSI for E-PDCCH, perhaps, that carries in the RRC signaling is period 1 value and the first deviant for the CQI/PMI feedback of E-PDCCH for the feedback indication information of E-PDCCH, and second week time value and the second deviant fed back for the RI of E-PDCCH.The base station also can be specially descending control signaling to the control signal that UE issues, and the feedback indication information that carry in this descending control signaling the base station is specially CSI feedback request bit.
Step 202 receives described subscriber equipment at the channel condition information CSI for described E-PDCCH that feeds back in corresponding subframe according to described feedback indication information.
UE is at the control signal that receives the base station transmission, and after getting access to the feedback indication information that wherein carries, UE according to this feedback indication information on corresponding subframe to the CSI of base station feedback for E-PDCCH, then the base station receives the CSI that UE feeds back in corresponding subframe, and corresponding subframe is herein specifically determined according to the feedback indication information.When UE periodic feedback CSI, the subframe of the subframe numbers indication that the base station can be determined in periodic quantity and deviant receives the CSI for E-PDCCH of UE feedback, the subframe of the first subframe numbers indication that the base station also can be determined in period 1 value and the first deviant receives the CQI/PMI for E-PDCCH of UE feedback, and the subframe of the second subframe numbers indication of determining in second week time value and the second deviant receives the RI for E-PDCCH that UE feeds back.When UE aperiodicity feedback CSI, the feedback indication information that the base station issues is specially CSI feedback request bit, if this CSI feedback request bit is default bit value, then the base station directly receives the CSI of UE feedback in the subframe of setting.
CSI in the present embodiment comprises at least a among CQI, PMI and the RI, and based on whole bandwidth or the predetermined bandwidth of part.The predetermined bandwidth of part is namely passed through the continuous or discrete frequency resource of the semi-static configuration of RRC signaling.Wherein, CQI selects to obtain from all CQI index (index) or subset wherein, and PMI selects to obtain from predefined code book or subset wherein, and RI selects to obtain from all orders or subset wherein.
Present embodiment provides a kind of information feedback method, issue control signal by the base station to UE, in control signal, carry the feedback indication information for E-PDCCH, and receive the CSI for E-PDCCH that UE feeds back in corresponding subframe according to this feedback indication information; Present embodiment has been introduced the CSI feedback for E-PDCCH, thereby has improved rank adaptation performance, precoding performance and the link circuit self-adapting performance of E-PDCCH.
Fig. 3 is the flow chart of information feedback method embodiment three of the present invention, and as shown in Figure 3, present embodiment provides a kind of information feedback method, can specifically comprise the steps:
Present embodiment is that UE periodically feeds back the CSI for E-PDCCH, and the sight that all feeds back in same subframe of the CQI among the CSI, PMI and RI.For this feedback kind, the base station needs configuration pin to periodic quantity and the deviant of the CSI feedback of E-PDCCH, and periodic quantity and the deviant that CSI feeds back can be determined according to channel variation speed and CSI accuracy requirement in the base station.This step is that being carried in the RRC signaling for the periodic quantity of the CSI of E-PDCCH feedback and deviant of will disposing of base station is issued to UE.
UE determines the employed subframe numbers of feedback CSI according to the periodic quantity of wherein carrying and deviant after receiving the RRC signaling that the base station issues.Particularly, the subframe numbers that obtains of UE can satisfy the condition of following formula (1):
Wherein, n
fBe the frame number of present frame, N
PBe the periodic quantity that the CSI for E-PDCCH that carries in the RRC signaling feeds back, N
OffsetBe the deviant for the CSI of E-PDCCH feedback of carrying in the RRC signaling,
Expression subframe residing position on present frame represents that namely this subframe is which subframe on the present frame, and mod is for asking modular arithmetic.By following formula (1) as can be known, the subframe that satisfies condition may have a plurality of, and may have a plurality of subframes all to satisfy condition in a frame, and the subframe numbers of indication represents this subframe residing position in whole frame structure herein.Can be met the n of condition by following formula (1)
fAnd n
s, determine thus the employed subframe numbers of feedback CSI
After determining subframe numbers according to periodic quantity and deviant, to the CSI of base station feedback for E-PDCCH, the CSI in the present embodiment can comprise at least a or multiple arbitrarily among CQI, PMI and the RI on the indicated same subframe of the subframe numbers that UE determines in above-mentioned steps 302.Present embodiment is to base station feedback CSI on the subframe that satisfies following formula (1), CQI among the CSI, PMI and RI all feed back in same subframe, because it is a plurality of that the subframe that satisfies condition has, so present embodiment is that UE is periodically to CQI, PMI and the RI of base station feedback for E-PDCCH.
Present embodiment provides a kind of information feedback method, receive the RRC signaling that the base station issues by UE, from the RRC signaling, obtain periodic quantity and deviant for E-PDCCH, according to this periodic quantity and deviant on the subframe that satisfies condition periodically to the CSI of base station feedback for E-PDCCH; Present embodiment has been introduced the CSI feedback for E-PDCCH, thereby has improved rank adaptation performance, precoding performance and the link circuit self-adapting performance of E-PDCCH, thereby increases the power system capacity of E-PDCCH.
Fig. 4 is the flow chart of information feedback method embodiment four of the present invention, and as shown in Figure 4, present embodiment provides a kind of information feedback method, can specifically comprise the steps:
Step 401, the base station issues the RRC signaling to UE, carries period 1 value and the first deviant for the CQI/PMI of E-PDCCH feedback in the RRC signaling, and second week time value and the second deviant fed back for the RI of E-PDCCH.
Present embodiment is that UE periodically feeds back the CSI for E-PDCCH, and the CQI among the CSI and PMI all feed back in same subframe, the sight that RI feeds back in independent subframe, and namely CQI/PMI feeds back in different subframes with RI.For this feedback kind, configuration pin need to be distinguished to period 1 value and first deviant of the CQI/PMI feedback of E-PDCCH in the base station, and for second week time value and second deviant of the RI of E-PDCCH feedback, period 1 value, the first deviant, second week time value and second deviant of CSI feedback can be determined according to channel variation speed and CSI accuracy requirement in the base station.This step is period 1 value and the first deviant for the CQI/PMI of E-PDCCH feedback that the base station will dispose, and the second week time value that feeds back for the RI of E-PDCCH and the second deviant are carried in the RRC signaling and are issued to UE.
Step 402, UE determines the first subframe numbers of feedback CQI/PMI according to this period 1 value and the first deviant.
UE determines employed the first subframe numbers of feedback CQI/PMI according to the period 1 value of wherein carrying and the first deviant after receiving the RRC signaling that the base station issues.Particularly, the first subframe numbers of obtaining of UE can satisfy the condition of following formula (2):
Wherein, n
fBe the frame number of present frame, N
P, 1Be the period 1 value that the CQI/PMI for E-PDCCH that carries in the RRC signaling feeds back, N
Offset, 1Be first deviant for the CQI/PMI of E-PDCCH feedback of carrying in the RRC signaling,
Expression subframe residing position on present frame represents that namely this subframe is which subframe on the present frame, and mod is for asking modular arithmetic.By following formula (2) as can be known, the subframe that satisfies condition may have a plurality of, and may have a plurality of subframes all to satisfy condition in a frame, and the first subframe numbers of indication represents this subframe residing position in whole frame structure herein.Can be met the n of condition by following formula (2)
fAnd n
s, determine thus employed the first subframe numbers of feedback CQI/PMI
Step 403, UE determines the second subframe numbers of feedback RI according to second week time value and the second deviant.
UE determines employed the second subframe numbers of feedback RI according to the second week time value that wherein carries and the second deviant after receiving the RRC signaling that the base station issues.Particularly, the second subframe numbers of obtaining of UE can satisfy the condition of following formula (3):
Wherein, n
fBe the frame number of present frame, N
P, 2Be the second week time value that the RI for E-PDCCH that carries in the RRC signaling feeds back, N
Offset, 2Be second deviant for the RI of E-PDCCH feedback of carrying in the RRC signaling,
Expression subframe residing position on present frame represents that namely this subframe is which subframe on the present frame, and mod is for asking modular arithmetic.By following formula (3) as can be known, the subframe that satisfies condition may have a plurality of, and may have a plurality of subframes all to satisfy condition in a frame, and the second subframe numbers of indication represents this subframe residing position in whole frame structure herein.Can be met the n of condition by following formula (3)
fAnd n
s, determine thus employed the second subframe numbers of feedback RI
Step 404, on the indicated subframe of the first subframe numbers that step 402 is determined to CQI and the PMI of base station feedback for E-PDCCH.
After determining the first subframe numbers according to period 1 value and the first deviant, on the indicated same subframe of the first subframe numbers that UE determines in above-mentioned steps 402 to CQI and the PMI of base station feedback for E-PDCCH.Present embodiment on the first subframe that satisfies following formula (2) to base station feedback CQI and PMI because that the subframe that satisfies condition has is a plurality of, so present embodiment is that UE is periodically to CQI and the PMI of base station feedback for E-PDCCH.
Step 405, on the indicated subframe of the second subframe numbers that step 403 is determined to the RI of base station feedback for E-PDCCH.
After determining the second subframe numbers according to second week time value and the second deviant, on the indicated same subframe of the second subframe numbers that UE determines in above-mentioned steps 403 to the RI of base station feedback for E-PDCCH.Present embodiment on the second subframe that satisfies following formula (3) to base station feedback RI because that the subframe that satisfies condition has is a plurality of, so present embodiment is that UE is periodically to the RI of base station feedback for E-PDCCH.
Present embodiment provides a kind of information feedback method, receive the RRC signaling that the base station issues by UE, from the RRC signaling, obtain period 1 value, the first deviant, second week time value and the second deviant for E-PDCCH, according to this period 1 value and the first deviant on the subframe that satisfies condition periodically to CQI and the PMI of base station feedback for E-PDCCH, according to this second week time value and the second deviant on the subframe that satisfies condition periodically to the RI of base station feedback for E-PDCCH; Present embodiment has been introduced the CSI feedback for E-PDCCH, thereby has improved rank adaptation performance, precoding performance and the link circuit self-adapting performance of E-PDCCH, thereby increases the power system capacity of E-PDCCH.
Fig. 5 is the flow chart of information feedback method embodiment five of the present invention, and as shown in Figure 5, present embodiment provides a kind of information feedback method, can specifically comprise the steps:
Present embodiment is that UE aperiodicity ground feedback is for the scene of the CSI of E-PDCCH.In order to support acyclic CSI feedback for E-PDCCH, the CSI feedback request bit for E-PDCCH can be carried in the base station in descending control signaling, and whether this CSI feedback request bit is used for the sign base station asks to feed back for the CSI of E-PDCCH.Particularly, the base station can be according to whether needs triggering UE feeds back the value that aperiodic CSI determines this feedback request bit.The base station can send the instruction of this CSI feedback of request in the process of uplink scheduling DCI, namely send the above-mentioned CSI feedback request bit of mentioning.In the LTE-Advanced agreement, the descending control command that is used for uplink scheduling can be DCI format 0 and 4 two kinds of forms of DCI format, DCI format 0 form is applicable to up single antenna and sends in the scene, DCI format 4 forms are applicable to upstream multi-antenna and send in the scene, can select as the case may be wherein a kind of form, then increase therein the CSI feedback request bit for E-PDCCH.
UE is after receiving the descending control signaling that the base station issues, therefrom get access to the CSI feedback request bit for E-PDCCH that wherein carries, UE judges whether this CSI feedback request bit is the bit value of presetting, and the default bit value in the present embodiment can be specially 1.When the CSI feedback request bit for E-PDCCH that carries in the descending control signal is 1, execution in step 503, otherwise show that the base station do not ask acyclic CSI feedback for E-PDCCH, then process ends.
When the CSI feedback request bit for E-PDCCH that carries in the descending control signaling that UE receives is 1, show that base station requests UE feedback is for the CSI of E-PDCCH, then UE is after receiving this CSI feedback request bit, the backward base station feedback CSI of subframe that postpones default subframe delay quantity, namely UE postpones after knowing this instruction after some subframes to base station feedback CSI.Subframe delay quantity herein can set in advance according to actual conditions, as is set to 20, and then the subframe after 20 subframes of delay is fed back CSI after receiving.
Present embodiment provides a kind of information feedback method, receive the descending control signaling that the base station issues by UE, from descending control signaling, obtain the CSI feedback request bit for E-PDCCH, when this CSI feedback request bit during for default bit value, after the subframe that postpones default subframe delay quantity to the CSI of base station feedback for E-PDCCH; Present embodiment has been introduced the CSI feedback for E-PDCCH, thereby has improved rank adaptation performance, precoding performance and the link circuit self-adapting performance of E-PDCCH, thereby increases the power system capacity of E-PDCCH.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: the various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Fig. 6 is the structure chart of subscriber equipment embodiment one of the present invention, and as shown in Figure 6, present embodiment provides a kind of subscriber equipment, can specifically carry out each step among the said method embodiment one, repeats no more herein.The subscriber equipment that present embodiment provides can specifically comprise the first receiver module 601 and feedback module 602.Wherein, the first receiver module 601 is used for receiving the control signal that the base station issues, and carries the feedback indication information for the Physical Downlink Control Channel E-PDCCH of expansion in the described control signal.Feedback module 602 be used for according to described feedback indication information on corresponding subframe to the channel condition information CSI of described base station feedback for described E-PDCCH.
Fig. 7 is the structure chart of subscriber equipment embodiment two of the present invention, and as shown in Figure 7, present embodiment provides a kind of subscriber equipment, can specifically carry out each step among said method embodiment three, embodiment four or the embodiment five, repeats no more herein.The subscriber equipment that present embodiment provides is on above-mentioned basis shown in Figure 6, and the described feedback indication information for E-PDCCH in the first receiver module 601 comprises periodic quantity and the deviant for the CSI feedback of E-PDCCH.Feedback module 602 can specifically comprise the first determining unit 612 and the first feedback unit 622.Wherein, the first determining unit 612 is used for determining according to following formula (1) subframe numbers of feedback CSI.The first feedback unit 622 is used on the indicated subframe of the described subframe numbers of determining to the CSI of described base station feedback for described E-PDCCH.
Perhaps, described feedback indication information for E-PDCCH in the first receiver module 601 in the present embodiment comprises period 1 value and the first deviant for the CQI/PMI of E-PDCCH feedback, and second week time value and the second deviant fed back for the RI of E-PDCCH.Feedback module 602 can specifically comprise the second determining unit 632, the 3rd determining unit 642, the second feedback unit 652 and the 3rd feedback unit 662.The second determining unit 632 is used for the first subframe numbers according to described period 1 value and the definite feedback of described the first deviant CQI/PMI, and the first subframe numbers satisfies the condition of following formula (2).The 3rd determining unit 642 is used for the second subframe numbers according to described second week time value and the definite feedback of described the second deviant RI, and the second subframe numbers satisfies the condition of following formula (3).The second feedback unit 652 is used on the indicated subframe of described the first subframe numbers to CQI and the PMI of described base station feedback for described E-PDCCH.The 3rd feedback unit 662 is used on the indicated subframe of described the second subframe numbers to the RI of described base station feedback for described E-PDCCH.
Perhaps, the described feedback indication information for E-PDCCH in the first receiver module 601 in the present embodiment is the CSI feedback request bit for E-PDCCH.Feedback module 602 can comprise specifically that the 4th feedback unit 672, the four feedback units 672 are used for when described CSI feedback request bit for E-PDCCH is the bit value of presetting the backward described base station feedback CSI of subframe that postpones default subframe delay quantity.
Particularly, the CSI in the present embodiment comprises at least a among CQI, PMI and the RI, and based on whole bandwidth or the predetermined bandwidth of part.The predetermined bandwidth of part is namely passed through the continuous or discrete frequency resource of the semi-static configuration of RRC signaling.Wherein, CQI selects to obtain from all CQI index or subset wherein, and PMI selects to obtain from predefined code book or subset wherein, and RI selects to obtain from all orders or subset wherein.
Present embodiment provides a kind of subscriber equipment, and the control signal that issues by receiving the base station obtains the feedback indication information for E-PDCCH from control signal, according to this feedback indication information on corresponding subframe to the CSI of base station feedback for E-PDCCH; Present embodiment has been introduced the CSI feedback for E-PDCCH, thereby has improved rank adaptation performance, precoding performance and the link circuit self-adapting performance of E-PDCCH.
Fig. 8 is the structure chart of base station embodiment one of the present invention, and as shown in Figure 8, present embodiment provides a kind of subscriber equipment, can specifically carry out each step among the said method embodiment two, repeats no more herein.The base station that present embodiment provides can specifically comprise sending module 801 and the second receiver module 802.Wherein, sending module 801 is used for sending control signaling to subscriber equipment, carries the feedback indication information for the Physical Downlink Control Channel E-PDCCH of expansion in the described control signal.The second receiver module 802 is used for receiving the channel condition information CSI for described E-PDCCH that described subscriber equipment feeds back in corresponding subframe according to described feedback indication information.
Fig. 9 is the structure chart of base station embodiment two of the present invention, and as shown in Figure 9, present embodiment provides a kind of subscriber equipment, can specifically carry out each step among said method embodiment three, embodiment four or the embodiment five, repeats no more herein.The base station that present embodiment provides is on above-mentioned basis shown in Figure 8, and the described feedback indication information for E-PDCCH in the sending module 801 comprises periodic quantity and the deviant for the CSI feedback of E-PDCCH.The second receiver module 802 can specifically comprise the first receiving element 812, the first receiving element 812 is used for receiving the CSI for described E-PDCCH that described subscriber equipment feeds back in the indicated subframe of subframe numbers of determining according to described periodic quantity and described deviant, and described subframe numbers can be determined according to following formula (1).
Perhaps, described feedback indication information for E-PDCCH in the sending module 801 in the present embodiment comprises period 1 value and the first deviant for the CQI/PMI of E-PDCCH feedback, and second week time value and the second deviant fed back for the RI of E-PDCCH.The second receiver module 802 can specifically comprise the second receiving element 822 and the 3rd receiving element 832.Wherein, the second receiving element 822 is used for receiving described subscriber equipment at CQI and the PMI for the described E-PDCCH that feed back according to described period 1 value and the definite indicated subframe of the first subframe numbers of described the first deviant, and described the first subframe numbers can be definite according to following formula (2).The 3rd receiving element 832 is used for receiving the RI for described E-PDCCH that described subscriber equipment feeds back in the indicated subframe of the second subframe numbers of determining according to described second week time value and described the second deviant, and described the second subframe numbers can be determined according to following formula (3).
Perhaps, the described control signal in the sending module 801 in the present embodiment is descending control signaling, and described feedback indication information for E-PDCCH is the CSI feedback request bit for E-PDCCH.The second receiver module 802 can specifically comprise the 4th receiving element 842, the 4th receiving element 842 is used for receiving the CSI that described subscriber equipment feeds back after the subframe that postpones default subframe delay quantity when described CSI feedback request bit for E-PDCCH is the bit value of presetting.
Present embodiment provides a kind of base station, by issuing control signal to UE, carries the feedback indication information for E-PDCCH in control signal, and receives the CSI for E-PDCCH that UE feeds back in corresponding subframe according to this feedback indication information; Present embodiment has been introduced the CSI feedback for E-PDCCH, thereby has improved rank adaptation performance, precoding performance and the link circuit self-adapting performance of E-PDCCH.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that previous embodiment is put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of embodiment of the invention technical scheme.
Claims (28)
1. an information feedback method is characterized in that, comprising:
Receive the control signal that the base station issues, carry the feedback indication information for the Physical Downlink Control Channel E-PDCCH of expansion in the described control signal;
According to described feedback indication information on corresponding subframe to the channel condition information CSI of described base station feedback for described E-PDCCH.
2. method according to claim 1 is characterized in that, described feedback indication information for E-PDCCH comprises periodic quantity and the deviant for the CSI feedback of E-PDCCH;
Describedly comprising to the CSI of described base station feedback for described E-PDCCH on corresponding subframe according to described feedback indication information:
Determine the subframe numbers of feedback CSI according to following formula:
Wherein, n
fBe the frame number of present frame, N
PBe described periodic quantity, N
OffsetBe described deviant,
Expression subframe residing position on present frame, mod is for asking modular arithmetic;
On the indicated subframe of the subframe numbers of determining to the CSI of described base station feedback for described E-PDCCH.
3. method according to claim 1, it is characterized in that, described feedback indication information for E-PDCCH comprises period 1 value and the first deviant for the CQI/PMI of E-PDCCH feedback, and second week time value and the second deviant fed back for the RI of E-PDCCH;
Describedly comprising to the CSI of described base station feedback for described E-PDCCH on corresponding subframe according to described feedback indication information:
According to the first subframe numbers of described period 1 value and the definite feedback of described the first deviant CQI/PMI, described the first subframe numbers satisfies the following formula condition:
Wherein, n
fBe the frame number of present frame, N
P, 1Be described period 1 value, N
Offse, 1Be described the first deviant,
Expression subframe residing position on present frame, mod is for asking modular arithmetic;
According to the second subframe numbers of described second week time value and the definite feedback of described the second deviant RI, described the second subframe numbers satisfies the following formula condition:
Wherein, n
fBe the frame number of present frame, N
P, 2Be described second week time value, N
Offse, 2Be described the second deviant,
Expression subframe residing position on present frame, mod is for asking modular arithmetic;
On the indicated subframe of described the first subframe numbers to CQI and the PMI of described base station feedback for described E-PDCCH;
On the indicated subframe of described the second subframe numbers to the RI of described base station feedback for described E-PDCCH.
4. method according to claim 1 is characterized in that, described feedback indication information for E-PDCCH is the CSI feedback request bit for E-PDCCH;
Describedly comprising to the CSI of described base station feedback for described E-PDCCH on corresponding subframe according to described feedback indication information:
When described CSI feedback request bit for E-PDCCH is the bit value of presetting, the backward described base station feedback CSI of subframe that postpones default subframe delay quantity.
5. according to claim 1,2 or 4 described methods, it is characterized in that described CSI comprises at least a or multiple arbitrarily among channel quality indicator (CQI), pre-coding matrix indication PMI and the order indication RI.
6. arbitrary described method is characterized in that according to claim 1～5, and described CSI is based on whole bandwidth or the predetermined bandwidth of part.
7. method according to claim 1 is characterized in that, described feedback indication information for E-PDCCH comprises subframe deviant and the position of PUSCH on frequency domain for the CSI feedback of E-PDCCH.
8. arbitrary described method is characterized in that according to claim 1-7, is describedly also comprising following any one on the corresponding subframe before the channel condition information CSI of described base station feedback for described E-PDCCH according to described feedback indication information:
Determine the frequency domain granularity of E-PDCCH CSI feedback according to system bandwidth;
Determine the frequency domain granularity that E-PDCCH CSI feeds back according to the static configuration that the base station sends;
Determine the frequency domain granularity that E-PDCCH CSI feeds back according to the semi-static configuration that the base station sends;
Determine the frequency domain granularity that E-PDCCH CSI feeds back according to the dynamic-configuration that the base station sends.
9. method according to claim 8 is characterized in that, also comprises after determining:
According to described frequency domain granularity, determine E-PDCCH CSI to be feedback;
10. described method is characterized in that according to claim 1～7, also comprises:
When the described E-PDCCH of PUSCH feedback, when described system bandwidth was identical, the frequency domain granule size of the CSI feedback that described E-PDCCH is corresponding was less than or equal to the frequency domain granule size of CSI feedback corresponding to Physical Uplink Shared Channel PUSCH; Or
When the described E-PDCCH of PUCCH feedback, when described system bandwidth was identical, the frequency domain granule size of the CSI feedback that described E-PDCCH is corresponding was less than or equal to the frequency domain granule size of CSI feedback corresponding to Physical Uplink Control Channel PUCCH.
11. method according to claim 10 is characterized in that, also comprises:
The CSI that described E-PDCCH is corresponding reports pattern to report pattern identical with CSI corresponding to PUSCH or PUCCH, also can be different.
12. method according to claim 10 is characterized in that, the frequency domain granule size that the frequency domain granule size of the CSI feedback that described E-PDCCH is corresponding is less than or equal to CSI feedback corresponding to Physical Uplink Shared Channel PUSCH comprises following any one:
When described system bandwidth is 6-7 Resource Block RB, determine that described subband size is 1RB;
When described system bandwidth is 8-10RB, determine that described subband size is 2RB;
When described system bandwidth is 11-26RB, determine that described subband size is 2RB;
When described system bandwidth is 27-63RB, determine that described subband size is 3RB;
When described system bandwidth is 64-110RB, determine that described subband size is 4RB.
13. arbitrary described method is characterized in that according to claim 1～7, also comprises:
In CSI feedback information corresponding to E-PDCCH, comprise position indication information;
Described position indication information is used to indicate at least one the best RB of channel conditions in the frequency domain granularity of feedback of CSI corresponding to PDSCH, and perhaps described position indication information is used to indicate at least one the best RB of channel conditions in one or several best frequency domain granularity of the channel conditions of feedback of CSI corresponding to PDSCH.
14. the method according to claim 13 is characterized in that, also comprises:
PMI in CSI information corresponding to E-PDCCH and/or CQI obtain from the CSI feedback information of PDSCH, described PMI and (or) position indication information of the corresponding frequency domain resource positional information of CQI from CSI feedback information corresponding to E-PDCCH obtain; Perhaps,
Also comprise frequency domain granularity and/or the corresponding PMI of RB and/or the CQI that the indicated channel conditions of described position indication information is best in CSI feedback information corresponding to E-PDCCH.
15. the method according to claim 1-14 is characterized in that, the modulation system of described E-PDCCH is fixed as quarternary phase-shift keying (QPSK) QPSK, need not the CQI indication.
16. according to claim 3 or 5 described methods, it is characterized in that, described CQI selects to obtain from all CQI index or subset wherein, and described PMI selects to obtain from predefined code book or subset wherein, and described RI selects to obtain from all orders or subset wherein.
17. an information feedback method is characterized in that, comprising:
Send control signaling to subscriber equipment, carry the feedback indication information for the Physical Downlink Control Channel E-PDCCH of expansion in the described control signal;
Receive the channel condition information CSI for described E-PDCCH that described subscriber equipment feeds back in corresponding subframe according to described feedback indication information.
18. method according to claim 17 is characterized in that, described feedback indication information for E-PDCCH comprises periodic quantity and the deviant for the CSI feedback of E-PDCCH;
The described subscriber equipment of described reception comprises according to the channel condition information CSI for described E-PDCCH that described feedback indication information feeds back in corresponding subframe:
Receive the CSI for described E-PDCCH that described subscriber equipment feeds back in the indicated subframe of subframe numbers of determining according to described periodic quantity and described deviant, described subframe numbers is determined according to following formula:
Wherein, n
fBe the frame number of present frame, N
PBe described periodic quantity, N
OffsetBe described deviant,
Expression subframe residing position on present frame, mod is for asking modular arithmetic.
19. method according to claim 17, it is characterized in that, described feedback indication information for E-PDCCH comprises period 1 value and the first deviant for the CQI/PMI of E-PDCCH feedback, and second week time value and the second deviant fed back for the RI of E-PDCCH;
The described subscriber equipment of described reception comprises according to the channel condition information CSI for described E-PDCCH that described feedback indication information feeds back in corresponding subframe:
Receive CQI and PMI for described E-PDCCH that described subscriber equipment feeds back in the indicated subframe of the first subframe numbers of determining according to described period 1 value and described the first deviant, described the first subframe numbers satisfies the following formula condition:
Wherein, n
fBe the frame number of present frame, N
P, 1Be described period 1 value, N
Offse, 1Be described the first deviant,
Expression subframe residing position on present frame, mod is for asking modular arithmetic;
Receive the RI for described E-PDCCH that described subscriber equipment feeds back in the indicated subframe of the second subframe numbers of determining according to described second week time value and described the second deviant, described the second subframe numbers satisfies the following formula condition:
Wherein, n
fBe the frame number of present frame, N
P, 2Be described second week time value, N
Offse, 2Be described the second deviant,
Expression subframe residing position on present frame, mod is for asking modular arithmetic.
20. method according to claim 17 is characterized in that, described feedback indication information for E-PDCCH is the CSI feedback request bit for E-PDCCH;
The described subscriber equipment of described reception comprises according to the channel condition information CSI for described E-PDCCH that described feedback indication information feeds back in corresponding subframe:
When described CSI feedback request bit for E-PDCCH is the bit value of presetting, receive the CSI that described subscriber equipment feeds back after the subframe that postpones default subframe delay quantity.
21. a subscriber equipment is characterized in that, comprising:
The first receiver module is used for receiving the control signal that the base station issues, and carries the feedback indication information for the Physical Downlink Control Channel E-PDCCH of expansion in the described control signal;
Feedback module, be used for according to described feedback indication information on corresponding subframe to the channel condition information CSI of described base station feedback for described E-PDCCH.
22. subscriber equipment according to claim 21 is characterized in that, the described feedback indication information for E-PDCCH in described the first receiver module comprises periodic quantity and the deviant for the CSI feedback of E-PDCCH;
Described feedback module comprises:
The first determining unit is used for the subframe numbers according to the definite feedback of following formula CSI:
Wherein, n
fBe the frame number of present frame, N
PBe described periodic quantity, N
OffsetBe described deviant,
Expression subframe residing position on present frame, mod is for asking modular arithmetic;
The first feedback unit is used on the indicated subframe of the described subframe numbers of determining to the CSI of described base station feedback for described E-PDCCH.
23. subscriber equipment according to claim 21, it is characterized in that, described feedback indication information for E-PDCCH in described the first receiver module comprises period 1 value and the first deviant for the CQI/PMI of E-PDCCH feedback, and second week time value and the second deviant fed back for the RI of E-PDCCH;
Described feedback module comprises:
The second determining unit is used for the first subframe numbers according to described period 1 value and the definite feedback of described the first deviant CQI/PMI, and described the first subframe numbers satisfies the following formula condition:
Wherein, n
fBe the frame number of present frame, N
P, 1Be described period 1 value, N
Offse, 1Be described the first deviant,
Expression subframe residing position on present frame, mod is for asking modular arithmetic;
The 3rd determining unit is used for the second subframe numbers according to described second week time value and the definite feedback of described the second deviant RI, and described the second subframe numbers satisfies the following formula condition:
Wherein, n
fBe the frame number of present frame, N
P, 2Be described second week time value, N
Offse, 2Be described the second deviant,
Expression subframe residing position on present frame, mod is for asking modular arithmetic;
The second feedback unit is used on the indicated subframe of described the first subframe numbers to CQI and the PMI of described base station feedback for described E-PDCCH;
The 3rd feedback unit is used on the indicated subframe of described the second subframe numbers to the RI of described base station feedback for described E-PDCCH.
24. subscriber equipment according to claim 21 is characterized in that, the described feedback indication information for E-PDCCH in described the first receiver module is the CSI feedback request bit for E-PDCCH;
Described feedback module comprises:
The 4th feedback unit is used for when described CSI feedback request bit for E-PDCCH is the bit value of presetting the backward described base station feedback CSI of subframe that postpones default subframe delay quantity.
25. a base station is characterized in that, comprising:
Sending module is used for sending control signaling to subscriber equipment, carries the feedback indication information for the Physical Downlink Control Channel E-PDCCH of expansion in the described control signal;
The second receiver module is used for receiving the channel condition information CSI for described E-PDCCH that described subscriber equipment feeds back in corresponding subframe according to described feedback indication information.
26. base station according to claim 25 is characterized in that, the described feedback indication information for E-PDCCH in the described sending module comprises periodic quantity and the deviant for the CSI feedback of E-PDCCH;
Described the second receiver module comprises:
The first receiving element is used for receiving the CSI for described E-PDCCH that described subscriber equipment feeds back in the indicated subframe of subframe numbers of determining according to described periodic quantity and described deviant, and described subframe numbers is determined according to following formula:
Wherein, n
fBe the frame number of present frame, N
PBe described periodic quantity, N
OffsetBe described deviant,
Expression subframe residing position on present frame, mod is for asking modular arithmetic.
27. base station according to claim 25, it is characterized in that, described feedback indication information for E-PDCCH in the described sending module comprises period 1 value and the first deviant for the CQI/PMI of E-PDCCH feedback, and second week time value and the second deviant fed back for the RI of E-PDCCH;
Described the second receiver module comprises:
The second receiving element is used for receiving described subscriber equipment at CQI and the PMI for the described E-PDCCH that feed back according to described period 1 value and the definite indicated subframe of the first subframe numbers of described the first deviant, and described the first subframe numbers satisfies the following formula condition:
Wherein, n
fBe the frame number of present frame, N
P, 1Be described period 1 value, N
Offse, 1Be described the first deviant,
Expression subframe residing position on present frame, mod is for asking modular arithmetic;
The 3rd receiving element is used for receiving the RI for described E-PDCCH that described subscriber equipment feeds back in the indicated subframe of the second subframe numbers of determining according to described second week time value and described the second deviant, and described the second subframe numbers satisfies the following formula condition:
Wherein, n
fBe the frame number of present frame, N
P, 2Be described second week time value, N
Offse, 2Be described the second deviant,
Expression subframe residing position on present frame, mod is for asking modular arithmetic.
28. base station according to claim 25 is characterized in that, the described feedback indication information for E-PDCCH in the described sending module is the CSI feedback request bit for E-PDCCH;
Described the second receiver module comprises:
The 4th receiving element is used for receiving the CSI that described subscriber equipment feeds back after the subframe that postpones default subframe delay quantity when described CSI feedback request bit for E-PDCCH is the bit value of presetting.
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| CN201110361974.9A CN102916785B (en) | 2011-08-04 | 2011-11-15 | Information feedback method, user equipment and base station |
| PCT/CN2012/079178 WO2013017034A1 (en) | 2011-08-04 | 2012-07-26 | Information feedback method, user equipment and base station |
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| CN201110361974.9A CN102916785B (en) | 2011-08-04 | 2011-11-15 | Information feedback method, user equipment and base station |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014183264A1 (en) * | 2013-05-14 | 2014-11-20 | 华为技术有限公司 | Csi feedback method of enhanced physical downlink control channel and user equipment |
| CN105099603A (en) * | 2014-04-28 | 2015-11-25 | 北京三星通信技术研究有限公司 | Channel state information report method and device |
| CN105165083A (en) * | 2013-07-11 | 2015-12-16 | 华为技术有限公司 | Method for feeding back channel state information (CSI), user equipment, and base station |
| CN106559182A (en) * | 2015-09-25 | 2017-04-05 | 中兴通讯股份有限公司 | The configuration acquisition methods of channel parameter, apparatus and system |
| CN107113815A (en) * | 2015-01-28 | 2017-08-29 | 富士通株式会社 | Channel information feedback method, device and the communication system of unauthorized frequency range |
| US20180077689A1 (en) * | 2016-09-15 | 2018-03-15 | Qualcomm Incorporated | Multiple bandwidth operation |
| CN108024280A (en) * | 2016-11-04 | 2018-05-11 | 华为技术有限公司 | The method and apparatus of information feedback |
| WO2018127038A1 (en) * | 2017-01-05 | 2018-07-12 | 华为技术有限公司 | Method of transmitting channel state information, device, and system |
| CN110278013A (en) * | 2014-12-23 | 2019-09-24 | 华为技术有限公司 | A kind of channel measurement and feedback method, the network equipment and system |
| CN111901068A (en) * | 2020-05-22 | 2020-11-06 | 中兴通讯股份有限公司 | Information feedback method, device, communication node and storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101677261A (en) * | 2008-09-18 | 2010-03-24 | 华为技术有限公司 | Management method and apparatus of period parameters of channel quality indication (CQI) feedback |
| CN101931440A (en) * | 2009-06-19 | 2010-12-29 | 华为技术有限公司 | Channel state information acquisition method and device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212282B (en) * | 2006-12-27 | 2010-12-08 | 华为技术有限公司 | Multi-input/multi-output based communication method and system |
| JP5456037B2 (en) * | 2009-06-02 | 2014-03-26 | パナソニック株式会社 | Terminal device, communication method, and integrated circuit |
-
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- 2011-11-15 CN CN201110361974.9A patent/CN102916785B/en active Active
-
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- 2012-07-26 WO PCT/CN2012/079178 patent/WO2013017034A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101677261A (en) * | 2008-09-18 | 2010-03-24 | 华为技术有限公司 | Management method and apparatus of period parameters of channel quality indication (CQI) feedback |
| CN101931440A (en) * | 2009-06-19 | 2010-12-29 | 华为技术有限公司 | Channel state information acquisition method and device |
Non-Patent Citations (1)
| Title |
|---|
| SAMSUNG: "R1-103687,Channel Quality Feedback Enhancement for Heterogeneous Network", 《3GPP TSG RAN WG1 #61BIS》 * |
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| CN102916785B (en) | 2017-04-12 |
| WO2013017034A1 (en) | 2013-02-07 |
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