CN102026280A - Feedback method and equipment for channel state information - Google Patents

Feedback method and equipment for channel state information Download PDF

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Publication number
CN102026280A
CN102026280A CN2009100923805A CN200910092380A CN102026280A CN 102026280 A CN102026280 A CN 102026280A CN 2009100923805 A CN2009100923805 A CN 2009100923805A CN 200910092380 A CN200910092380 A CN 200910092380A CN 102026280 A CN102026280 A CN 102026280A
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condition information
channel condition
unit
carrier wave
main carrier
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CN102026280B (en
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曹亘
郑瑞明
程顺川
张欣
潘峮
胡南
王军
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China Mobile Communications Group Co Ltd
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China Mobile Communications Group Co Ltd
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Abstract

The embodiment of the invention discloses a feedback method and feedback equipment for channel state information. The method comprises the following steps of: in a physical uplink control channel (PUCCH), feeding back the channel state information of a main carrier unit, and feeding back the channel state information of an auxiliary carrier unit in a differential quantization coding mode; in a physical uplink shared channel (PUSCH), feeding back the channel state information of a plurality of subcarriers in the main carrier unit in the differential quantization coding mode according to the difference of the channel state information of the plurality of subcarriers in the main carrier unit and the channel state information of the main carrier unit; and feeding back the channel state information of a plurality of subcarriers in the auxiliary carrier unit in the differential quantization coding mode according to the difference of the channel state information of the plurality of subcarriers in the auxiliary carrier unit and the channel state information of the auxiliary carrier unit. The feedback method and the feedback equipment save bit overhead required in the feedback of the channel state information of a plurality of carrier units.

Description

Feedback method of channel status information and equipment
Technical field
The present invention relates to communication field, relate in particular to a kind of feedback method of channel status information and equipment.
Background technology
At LTE-Advanced (Long Term Evolution-Advanced, advanced Long Term Evolution, hereinafter to be referred as LTE-A) in the system, in order to support than the wideer system bandwidth of LTE system to need by the resource of a plurality of carrier waves unit (claiming member carrier again) is carried out using after the polymerization such as 100MHz.Concrete polymerization methods comprises followingly having two kinds:
(1) a plurality of continuous carrier wave unit is carried out polymerization, for LTE-A provides bigger transmission bandwidth.
(2) a plurality of discontinuous carrier waves unit is carried out polymerization, for LTE-A provides bigger transmission bandwidth; The discontinuous carrier polymerization has more polymerization flexibility.
And in the scheme of existing LTE feedback, only considered the feedback information of single carrier wave unit, do not consider under the situation that the feedback information spending that brings when a plurality of carrier wave cell channel quality information feedback increases how to reduce the method for overhead transmission feedback information.CQI (the ChannelQuality Indication of current LTE agreement regulation, the channel quality indication) feedback scheme, be only applicable to the situation of single carrier wave unit, after using carrier aggregation technology, how further the expense of feedback information is a problem demanding prompt solution in the prior art on a plurality of carrier waves of the reduction unit.
Summary of the invention
Embodiments of the invention provide a kind of feedback method of channel status information and equipment, are used for saving the required overhead bit of channel condition information feedback of a plurality of carrier waves unit.
Embodiments of the invention provide a kind of feedback method of channel status information, comprising:
Go physically among the control channel PUCCH, the channel condition information of main carrier unit is fed back, and the mode by the difference quantization encoding is fed back the channel condition information of auxilliary carrier wave unit;
Among the capable physically shared channel PUSCH, according to the difference of the channel condition information of the channel condition information of a plurality of subcarriers in the described main carrier unit and described main carrier unit, the mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the described main carrier unit; According to the difference of the channel condition information of the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit and described auxilliary carrier wave unit, the mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit.
Wherein, described channel condition information is represented by modulating-coding form MCS grade.
Wherein, described mode by the difference quantization encoding is fed back the channel condition information of described auxilliary carrier wave unit, comprising:
When the frequency band correlation of described main carrier unit and auxilliary carrier wave unit is strong, use the mode of the difference quantization encoding that mixes feedback that the channel condition information of assisting the carrier wave unit is fed back, concrete:
Obtain the difference of the MCS grade of channel condition information correspondence of the auxilliary carrier wave unit MCS grade corresponding, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively with the channel condition information of main carrier unit.
Wherein, described mode by the difference quantization encoding is fed back the channel condition information of described auxilliary carrier wave unit, comprising:
When the frequency band correlation of described main carrier unit and auxilliary carrier wave unit is weak, use the mode of the difference quantization encoding that mixes feedback that the channel condition information of assisting the carrier wave unit is fed back, concrete:
At fixing one or more special time slots, feed back the MCS grade of the channel condition information correspondence of described auxilliary carrier wave unit; At other transmission time slots, obtain the difference of the MCS grade of the MCS grade of channel condition information correspondence of described auxilliary carrier wave unit and described special time slot feedback, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively.
Wherein, described according to a plurality of subcarriers in the described main carrier unit channel condition information and the difference of the channel condition information of described main carrier unit, mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the described main carrier unit, comprising:
MCS grade according to the channel condition information correspondence of the MCS grade of the channel condition information correspondence of previous moment main carrier unit and a plurality of subcarriers of current time, obtain the difference of the MCS grade of the MCS grade of each subcarrier of current time and main carrier unit, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively;
Described according to a plurality of subcarriers in the described auxilliary carrier wave unit channel condition information and the difference of the channel condition information of described auxilliary carrier wave unit, mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit, comprising:
MCS grade according to the channel condition information correspondence of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of previous moment and a plurality of subcarriers of current time, obtain the difference of the MCS grade of the MCS grade of each subcarrier of current time and auxilliary carrier wave unit, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively.
Wherein, described channel condition information to the main carrier unit feeds back and comprises:
In PUCCH, coding by regular length or the mode by the difference quantization encoding are fed back the channel condition information of main carrier unit.
Wherein, described in PUCCH, the mode by the difference quantization encoding is fed back the channel condition information of main carrier unit and is comprised:
At fixing one or more special time slots, feed back the MCS grade of the channel condition information correspondence of described main carrier unit; At other transmission time slots, obtain the difference of the MCS grade of the MCS grade of channel condition information correspondence of described main carrier unit and described special time slot feedback, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively.
Embodiments of the invention also provide a kind of acquisition methods of channel condition information, comprising:
Go physically among the control channel PUCCH,, obtain the channel condition information of main carrier unit according to the channel condition information of the main carrier unit that feeds back; According to the channel condition information of the auxilliary carrier wave unit that feeds back by the mode of difference quantization encoding, obtain the channel condition information of auxilliary carrier wave unit;
Among the capable physically shared channel PUSCH, the channel condition information of a plurality of subcarriers in the described main carrier unit that feeds back according to the channel condition information of main carrier unit and by the mode of difference quantization encoding obtains the channel condition information of a plurality of subcarriers in the described main carrier unit; The channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit that feeds back according to the channel condition information of auxilliary carrier wave unit and by the mode of difference quantization encoding obtains the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit.
Wherein, described channel condition information is represented by modulating-coding form MCS grade.
Wherein, the channel condition information of the auxilliary carrier wave unit that described basis is fed back by the mode of difference quantization encoding obtains the channel condition information of auxilliary carrier wave unit, comprising:
When the frequency band correlation of described main carrier unit and auxilliary carrier wave unit is strong, according to the absolute value and the positive and negative situation of the difference of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of the MCS grade of the channel condition information correspondence of main carrier unit and the feedback MCS grade corresponding, obtain the channel condition information of assisting the carrier wave unit with the channel condition information of main carrier unit.
Wherein, the channel condition information of the auxilliary carrier wave unit that described basis is fed back by the mode of difference quantization encoding obtains the channel condition information of auxilliary carrier wave unit, comprising:
When the frequency band correlation of described main carrier unit and auxilliary carrier wave unit is weak, obtain MCS grade in the channel condition information correspondence of the described auxilliary carrier wave unit that fixing one or more special time slots feed back; At other transmission time slots, obtain the absolute value and the positive and negative situation of difference of the MCS grade of the MCS grade of channel condition information correspondence of described auxilliary carrier wave unit of feedback and described special time slot feedback, obtain the channel condition information of auxilliary carrier wave unit.
Wherein, described according to the main carrier unit channel condition information and the described main carrier unit that feeds back by the mode of difference quantization encoding in the channel condition information of a plurality of subcarriers, obtain the channel condition information of a plurality of subcarriers in the described main carrier unit, comprising:
According to the absolute value and the positive and negative situation of the difference of the MCS grade of the MCS grade of each subcarrier of current time of the MCS grade of the channel condition information correspondence of previous moment main carrier unit and feedback and main carrier unit, obtain the channel condition information of a plurality of subcarriers in the described main carrier of the current time unit;
The channel condition information of a plurality of subcarriers in the channel condition information of the auxilliary carrier wave unit of described basis and the described auxilliary carrier wave unit that feeds back by the mode of difference quantization encoding obtains the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit, comprising:
According to the absolute value and the positive and negative situation of the difference of the MCS grade of the MCS grade of each subcarrier of current time of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of previous moment and feedback and auxilliary carrier wave unit, obtain the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave of the current time unit.
Wherein, the channel condition information of described main carrier unit according to feedback, the channel condition information that obtains the main carrier unit comprise:
In PUCCH, the channel condition information of the main carrier unit that feeds back according to the coding by regular length or by the mode of difference quantization encoding obtains the channel condition information of main carrier unit.
Wherein, described in PUCCH, the channel condition information of the main carrier unit that feeds back according to the coding by regular length or by the mode of difference quantization encoding, the channel condition information that obtains the main carrier unit comprises:
Obtain MCS grade in the channel condition information correspondence of the described main carrier unit that fixing one or more special time slots feed back; At other transmission time slots, obtain the absolute value and the positive and negative situation of difference of the MCS grade of the MCS grade of channel condition information correspondence of described main carrier unit of feedback and described special time slot feedback, obtain the channel condition information of main carrier unit.
Embodiments of the invention also provide a kind of terminal equipment, comprising:
Main carrier location mode feedback information unit is used at PUCCH, and the channel condition information of main carrier unit is fed back;
Auxilliary carrier wave location mode feedback information unit is used at PUCCH, by the mode of difference quantization encoding the channel condition information of assisting the carrier wave unit is fed back;
Unit of sub-carriers state information feedback unit, be used at PUSCH, according to the difference of the channel condition information of the channel condition information of a plurality of subcarriers in the described main carrier unit and described main carrier unit, the mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the described main carrier unit; According to the difference of the channel condition information of the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit and described auxilliary carrier wave unit, the mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit.
Wherein, described channel condition information is represented by modulating-coding form MCS grade.
Wherein, described auxilliary carrier wave location mode feedback information unit comprises:
The first feedback subelement, be used for frequency band correlation when strong in described main carrier unit and auxilliary carrier wave unit, use the mode of the difference quantization encoding that mixes feedback that the channel condition information of assisting the carrier wave unit is fed back, concrete: as to obtain the difference of the MCS grade of channel condition information correspondence of the auxilliary carrier wave unit MCS grade corresponding, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively with the channel condition information of main carrier unit; And/or
The second feedback subelement, when being used for a little less than the frequency band correlation of described main carrier unit and auxilliary carrier wave unit, use the mode of the difference quantization encoding that mixes feedback that the channel condition information of assisting the carrier wave unit is fed back, concrete: at fixing one or more special time slots, feed back the MCS grade of the channel condition information correspondence of described auxilliary carrier wave unit; At other transmission time slots, obtain the difference of the MCS grade of the MCS grade of channel condition information correspondence of described auxilliary carrier wave unit and described special time slot feedback, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively.
Wherein, described unit of sub-carriers state information feedback unit specifically is used for:
MCS grade according to the channel condition information correspondence of the MCS grade of the channel condition information correspondence of previous moment main carrier unit and a plurality of subcarriers of current time, obtain the difference of the MCS grade of the MCS grade of each subcarrier of current time and main carrier unit, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively;
MCS grade according to the channel condition information correspondence of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of previous moment and a plurality of subcarriers of current time, obtain the difference of the MCS grade of the MCS grade of each subcarrier of current time and auxilliary carrier wave unit, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively.
Wherein, described main carrier location mode feedback information unit specifically is used for:
In PUCCH, the coding by regular length feeds back the channel condition information of main carrier unit; Or the mode by the difference quantization encoding feeds back the channel condition information of main carrier unit, and is concrete: as at fixing one or more special time slots, to feed back the MCS grade of the channel condition information correspondence of described main carrier unit; At other transmission time slots, obtain the difference of the MCS grade of the MCS grade of channel condition information correspondence of described main carrier unit and described special time slot feedback, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively.
Embodiments of the invention also provide a kind of network equipment, comprising:
Main carrier location mode information acquisition unit is used at PUCCH, according to the channel condition information of the main carrier unit that feeds back, obtains the channel condition information of main carrier unit;
Auxilliary carrier wave location mode information acquisition unit is used at PUCCH, according to the channel condition information of the auxilliary carrier wave unit that feeds back by the mode of difference quantization encoding, obtains the channel condition information of auxilliary carrier wave unit;
Unit of sub-carriers state information acquisition unit, be used at PUSCH, the channel condition information of a plurality of subcarriers in the described main carrier unit that feeds back according to the channel condition information of main carrier unit and by the mode of difference quantization encoding obtains the channel condition information of a plurality of subcarriers in the described main carrier unit; The channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit that feeds back according to the channel condition information of auxilliary carrier wave unit and by the mode of difference quantization encoding obtains the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit.
Wherein, described channel condition information is represented by modulating-coding form MCS grade.
Wherein, described auxilliary carrier wave location mode information acquisition unit comprises:
The first feedback subelement, be used for frequency band correlation when strong in described main carrier unit and auxilliary carrier wave unit, according to the absolute value and the positive and negative situation of the difference of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of the MCS grade of the channel condition information correspondence of main carrier unit and the feedback MCS grade corresponding, obtain the channel condition information of assisting the carrier wave unit with the channel condition information of main carrier unit; And/or
The second feedback subelement when being used for a little less than the frequency band correlation of described main carrier unit and auxilliary carrier wave unit, obtains the MCS grade in the channel condition information correspondence of the described auxilliary carrier wave unit that fixing one or more special time slots feed back; At other transmission time slots, obtain the absolute value and the positive and negative situation of difference of the MCS grade of the MCS grade of channel condition information correspondence of described auxilliary carrier wave unit of feedback and described special time slot feedback, obtain the channel condition information of auxilliary carrier wave unit.
Wherein, described unit of sub-carriers state information acquisition unit specifically is used for:
According to the absolute value and the positive and negative situation of the difference of the MCS grade of the MCS grade of each subcarrier of current time of the MCS grade of the channel condition information correspondence of previous moment main carrier unit and feedback and main carrier unit, obtain the channel condition information of a plurality of subcarriers in the described main carrier of the current time unit;
According to the absolute value and the positive and negative situation of the difference of the MCS grade of the MCS grade of each subcarrier of current time of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of previous moment and feedback and auxilliary carrier wave unit, obtain the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave of the current time unit.
Wherein, described main carrier location mode feedback information unit specifically is used for:
In PUCCH,, obtain the channel condition information of main carrier unit according to the channel condition information of the main carrier unit that feeds back by the coded system of regular length; Or according to the channel condition information of the main carrier unit that feeds back by the mode of difference quantization encoding, obtain the channel condition information of main carrier unit, concrete: as to obtain MCS grade in the channel condition information correspondence of the described main carrier unit that fixing one or more special time slots feed back; At other transmission time slots, obtain the absolute value and the positive and negative situation of difference of the MCS grade of the MCS grade of channel condition information correspondence of described main carrier unit of feedback and described special time slot feedback, obtain the channel condition information of main carrier unit.
Compared with prior art, embodiments of the invention have the following advantages:
Under the situation of multi-carrier polymerizing, mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in a plurality of subcarriers and the described auxilliary carrier wave unit in auxilliary carrier wave unit, the main carrier unit, has saved required overhead bit in the channel condition information feedback of a plurality of carrier waves unit.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of the feedback method of channel status information that provides in the embodiment of the invention;
Fig. 2 is another flow chart of the feedback method of channel status information that provides in the embodiment of the invention
Fig. 3 is the main carrier unit used in the embodiment of the invention and the schematic diagram of auxilliary carrier wave unit;
Fig. 4 is the feedback system schematic diagram of the channel condition information of the main carrier unit that provides in the embodiment of the invention;
Fig. 5 is the feedback system schematic diagram of the channel condition information of the auxilliary carrier wave unit that provides in the embodiment of the invention;
Fig. 6 is the feedback system schematic diagram of the channel condition information of the unit of sub-carriers that provides in the embodiment of the invention
Fig. 7 is the schematic diagram of the channel condition information of the main carrier unit that obtains terminal equipment feedback that provides in the embodiment of the invention and auxilliary carrier wave unit;
Fig. 8 is the schematic diagram of the channel condition information of the unit of sub-carriers of obtaining terminal equipment feedback that provides in the embodiment of the invention;
Fig. 9 is the structural representation of the terminal equipment that provides in the embodiment of the invention;
Figure 10 is the structural representation of the network equipment that provides in the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only 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 is obtained under the creative work prerequisite.
Embodiments of the invention provide a kind of feedback method of channel status information, when being applied to carry out the terminal equipment side of channel condition information feedback, as shown in Figure 1, comprising:
Step s101, at PUCCH (Physical Uplink Control Channel, Physical Uplink Control Channel) in, channel condition information to the main carrier unit feeds back, and by the mode of difference quantization encoding the channel condition information of assisting the carrier wave unit is fed back;
Step s102, at PUSCH (Physical Uplink Shared Channel, Physical Uplink Shared Channel) in, according to the difference of the channel condition information of the channel condition information of a plurality of subcarriers in the main carrier unit and main carrier unit, the mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the main carrier unit; According to the difference of channel condition information with the channel condition information of auxilliary carrier wave unit of a plurality of subcarriers in the auxilliary carrier wave unit, the channel condition information of assisting a plurality of subcarriers in the carrier wave unit is fed back by the mode of difference quantization encoding.
For the feedback method of channel status information that embodiments of the invention provide, when being applied to obtain the network equipment of channel condition information of feedback, as shown in Figure 2, comprising:
Step s201, in PUCCH, according to the channel condition information of the main carrier unit of feedback, obtain the channel condition information of main carrier unit; According to the channel condition information of the auxilliary carrier wave unit that feeds back by the mode of difference quantization encoding, obtain the channel condition information of auxilliary carrier wave unit;
Step s202, in PUSCH, the channel condition information of a plurality of subcarriers in the main carrier unit that feeds back according to the channel condition information of main carrier unit and by the mode of difference quantization encoding obtains the channel condition information of a plurality of subcarriers in the main carrier unit; The channel condition information of a plurality of subcarriers in the auxilliary carrier wave unit that feeds back according to the channel condition information of auxilliary carrier wave unit and by the mode of difference quantization encoding obtains the channel condition information of a plurality of subcarriers in the auxilliary carrier wave unit.
Below in conjunction with concrete application scenarios, the embodiment of feedback method of channel status information among the present invention is described.
Under the multi-carrier polymerizing situation, for terminal equipment, to the corresponding channel status of each carrier wave unit independent measurement, and SINR (the Signal to Interference plusNoise Ratio that obtains according to the channel status measurement result, Signal to Interference plus Noise Ratio) or other the reflection current channel conditions information, the throughput grade of SINR or reflection current channel condition is mapped to corresponding MCS (Modulation and Coding Scheme, modulating-coding form) grade.The MCS grade of the channel status correspondence of each carrier wave unit is: MCS 1, MCS 2, MCS 3... MCS N, wherein N is the carrier wave element number that has activated.
In the application scenarios of the present invention, on PUCCH, the channel condition information of assisting the carrier wave unit is fed back by the mode of difference quantization encoding; On PUSCH, the mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in main carrier unit and the auxilliary carrier wave unit.Below respectively the feedback system among PUCCH and the PUSCH is described.
(1) channel condition information of feedback main carrier unit and auxilliary carrier wave unit on PUCCH.
At first introduce the feedback system of the channel condition information of main carrier unit.
The relation of main carrier unit and auxilliary carrier wave unit as shown in Figure 3.Wherein, the main carrier unit is a carrier wave unit by the static appointment of high-level signaling.The main carrier unit can use following two kinds of feedback systems that channel condition information is fed back according to the indication information of high-level signaling, its schematic diagram as shown in Figure 4:
(1) the quantification MCS class information of feedback regular length (for example length is 5 bits); Or
(2) use the independent feedback mode, the MCS class information through quantizing in specific transmission time or agreement time slot feedback is in other transmission times or the current MCS grade that measures of slot transmission and specific transmission time or arrange the difference of the MCS class information of slot transmission.
Below introduce the feedback system of the channel condition information of auxilliary carrier wave unit.
In the embodiments of the invention, feedback system for the channel condition information of assisting the carrier wave unit, network side is configured and sends the high-level signaling information about configuration in advance, and terminal is selected mixing feedback system or independent feedback mode about auxilliary carrier wave unit according to high-level signaling information.The choice criteria of dual mode is relevant with the frequency band correlation of auxilliary carrier wave unit and main carrier unit, when the frequency band correlation of assisting carrier wave unit and main carrier unit is strong, adopts and mixes feedback system; When the frequency band correlation of auxilliary carrier wave unit and main carrier unit is more weak, adopt the independent feedback mode.Wherein, the difference with the MCS grade of the MCS grade of weak criterion and auxilliary carrier wave unit and carrier wave unit by force of the frequency band correlation of auxilliary carrier wave unit and main carrier unit is relevant, and the big more then correlation of difference is weak more, and the more little then correlation of difference is strong more.
For mixing feedback system: when the frequency band correlation of auxilliary carrier wave unit and main carrier unit is strong, the MCS grade MCS that auxilliary carrier wave cell channel state information measures with auxilliary carrier wave unit iDifference DELTA with main carrier unit MCS grade MCS iRepresent.Difference DELTA iAccount form as shown in Equation (1):
Δ i＝MCS i-MCS (1)
In the LTE system of prior art, MCS is divided into 16 grades, so the MCS grade needs 4 bit quantizations coding.Under the situation of carrier aggregation, 5 bit feedback state informations are selected to use according to the MCS grade that measures in the main carrier unit of prior LTE system appointment.Difference DELTA for auxilliary carrier wave unit MCS grade and main carrier unit MCS grade i, in cataloged procedure, need the information indication Δ of 1 bit iPositive and negative situation.The frequency band correlation of considering main carrier unit and auxilliary carrier wave unit is bigger, i.e. Δ iThe value span is not too large, Δ iAdopt 3 bit quantizations coding can satisfy the requirement of channel condition information feedback accuracy, wherein the 1st bit indicated Δ iPositive and negative situation, the scope that back 2 bits decisions quantizes (is a Δ iAbsolute value).Except adopting 3 bit quantizations coding, can certainly adopt 4 bit quantizations coding, then wherein the 1st bit indicated Δ iPositive and negative situation, the scope that back 3 bits decisions quantizes.
For the independent feedback mode: auxilliary carrier wave unit and main carrier unit frequency band correlation a little less than, auxilliary carrier wave unit selection dynamic time feedback system, at the transmission time slot of specific transmission time or agreement (as T 1) the feedback MCS grade that quantification obtains according to channel condition information, the MCS grade adopts 5 bit quantizations coding; At the transmission time slot of other constant transmissions times or agreement (as T 2) feedback and difference DELTA in the MCS grade of the transmission time slot of specific transmission time or agreement transmission, this difference can adopt the quantization encoding of 3 bits (or some bits), the positive and negative situation of the 1st bit indication Δ wherein, the scope (being the absolute value of Δ) that back 2 bits (or some bits) decision quantizes.The difference DELTA account form is as shown in Equation (2):
Δ = MCS T 1 - MCS T 2 (2)
Can certainly adopt 4 bit quantizations coding, then wherein the 1st bit indicated Δ iPositive and negative situation, the scope that back 3 bits decisions quantizes.
The feedback system schematic diagram of the channel condition information of auxilliary carrier wave unit as shown in Figure 5 in the embodiment of the invention.
Therefore, no matter adopt any mode, compare, can effectively reduce overhead bit with directly using 5 bit feedback state informations in the prior art.
(2) on PUSCH, the mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in main carrier unit and the auxilliary carrier wave unit.
Each carrier wave unit (comprising main carrier unit and auxilliary carrier wave unit) when feeding back the channel quality information of a plurality of subcarriers, needs the channel quality information of feedback to be directly proportional with the carrier wave unit number N of polymerization according to high-level signaling.Consider that the feedack amount is bigger, current PUCCH channel can not satisfy transmission requirement, therefore, and can be at the channel condition information of a plurality of subcarriers of PUSCH Channel Transmission carrier wave unit.
Channel condition information for a plurality of subcarriers of main carrier unit, its feedback system is: according to the broadband MCS grade of previous moment main carrier unit measurement, measure the MCS grade of a plurality of subcarriers with current time, calculate the MCS grade MCS of current time subcarrier SubcarrierMCS grade MCS with the main carrier unit WidebandDifference.This difference has reflected the channel condition information of current subcarrier.The difference DELTA account form is as shown in Equation (3):
Δ = MCS wideband - MCS subcarrie r i (3)
Wherein i is used to identify different subcarriers.This difference can adopt the quantization encoding of 3 bits (or some bits) equally, the positive and negative situation of the 1st bit indication Δ wherein, the scope (being the absolute value of Δ) that back 2 bits (or some bits) decision quantizes.
Channel condition information for a plurality of subcarriers of assisting the carrier wave unit, its feedback system is: the broadband MCS grade of the auxilliary carrier wave unit that measures according to previous moment, the MCS grade of a plurality of subcarriers that measure with current time is calculated the MCS grade of current time subcarrier
Figure B2009100923805D0000141
Broadband MCS grade MCS with auxilliary carrier wave unit Wideband, T, PUCCHDifference.This difference has reflected the channel condition information of current subcarrier.Difference DELTA PUSCHAccount form is as shown in Equation (4):
Δ PUSCH = MCS wideband , T , PUCCH - MCS subcarrie r j , t (4)
Wherein j is used to identify different subcarriers.This difference DELTA PUSCHCan adopt the quantization encoding of 3 bits (or some bits) equally, the positive and negative situation of the 1st bit indication Δ wherein, the scope (being the absolute value of Δ) that back 2 bits (or some bits) decision quantizes.
The feedback system schematic diagram of the channel condition information of above-mentioned unit of sub-carriers as shown in Figure 6 in the embodiment of the invention.
Owing to utilize the broad-band channel state information that measures the carrier wave unit of previous moment, when therefore transmitting the channel condition information of a plurality of subcarriers, the difference that only needs the broadband MCS grade of the MCS grade of transmission current time subcarrier and carrier wave unit does not need to transmit simultaneously the broad-band channel state information of all carrier wave unit.
In the embodiments of the invention, network equipment is decoded to the channel condition information that receives when receiving terminal equipment at the channel condition information that feeds back.Concrete, in PUCCH, the channel condition information of the auxilliary carrier wave unit that feeds back according to the correlation of main carrier unit and auxilliary carrier wave unit and by the mode of difference quantization encoding obtains the channel condition information of assisting the carrier wave unit; In PUSCH, the channel condition information of a plurality of subcarriers in main carrier unit that feeds back according to the channel condition information of main carrier unit and auxilliary carrier wave unit and by the mode of difference quantization encoding and the auxilliary carrier wave unit obtains the channel condition information of a plurality of subcarriers in main carrier unit and the auxilliary carrier wave unit.
Below respectively the obtain manner of the channel condition information that feeds back among PUCCH and the PUSCH is described.
(1) on PUCCH, obtains the main carrier unit of terminal equipment feedback and the channel condition information of auxilliary carrier wave unit.
Obtain manner for the channel condition information of main carrier unit:
Network equipment can be gone up the directly quantification MCS class information of the regular length (for example length is 5 bits) of feedback of terminal equipment according to PUCCH, obtains the channel condition information of main carrier unit; Or network equipment is according to the terminal equipment that the receives difference at the MCS class information that transmits through the MCS class information that quantizes and at the current MCS grade that measures of other transmission times transmission and specific transmission time or predetermined time slot of specific transmission time or agreement time slot feedback, and then obtains the channel condition information of main carrier unit.
Obtain manner for the channel condition information of assisting the carrier wave unit:
When the frequency band correlation of main carrier unit and auxilliary carrier wave unit is strong, be that terminal equipment is when taking to mix the mode of feedback, network equipment can be according to the absolute value and the positive and negative situation of the difference of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of the MCS grade of the channel condition information correspondence of main carrier unit and the terminal equipment feedback MCS grade corresponding with the channel condition information of main carrier unit, and then obtains the channel condition information of assisting the carrier wave unit by differential decoding.
When the frequency band correlation of main carrier unit and auxilliary carrier wave unit is more weak, be terminal equipment when taking the mode of independent feedback, network equipment can obtain the MCS grade of terminal equipment in the channel condition information correspondence of the auxilliary carrier wave unit of fixing one or more special time slots feedbacks; At other transmission time slots, network equipment can obtain the absolute value and the positive and negative situation of MCS grade and the difference of the MCS grade of special time slot feedback of channel condition information correspondence of the auxilliary carrier wave unit of terminal equipment feedback, and then obtains the channel condition information of assisting the carrier wave unit by differential decoding.
Fig. 7 is the schematic diagram that obtains the channel condition information of the main carrier unit of terminal equipment feedback and auxilliary carrier wave unit in the embodiment of the invention.
(2) on PUSCH, obtain the unit of sub-carriers channel condition information that terminal equipment feeds back.
For a plurality of subcarriers in the main carrier unit, network equipment can be according to the absolute value and the positive and negative situation of the difference of the MCS grade of the MCS grade of each subcarrier of current time of the MCS grade of the channel condition information correspondence of previous moment main carrier unit and terminal equipment feedback and main carrier unit, and then obtains the channel condition information of a plurality of subcarriers in the current time main carrier unit by differential decoding;
For a plurality of subcarriers in the auxilliary carrier wave unit, network equipment can be according to the MCS grade of each subcarrier of current time of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of previous moment and terminal equipment feedback and the absolute value and the positive and negative situation of the difference of the MCS grade of auxilliary carrier wave unit, and then obtains the channel condition information that current time is assisted a plurality of subcarriers in the carrier wave unit by differential decoding.
Fig. 8 is the schematic diagram of channel condition information that obtains the unit of sub-carriers of terminal equipment feedback in the embodiment of the invention.
The said method that the application of the invention provides, under the situation of multi-carrier polymerizing, mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in a plurality of subcarriers and the described auxilliary carrier wave unit in auxilliary carrier wave unit, the main carrier unit, has saved required overhead bit in the channel condition information feedback of a plurality of carrier waves unit.
Embodiments of the invention also provide a kind of terminal equipment, as shown in Figure 9, comprising:
Main carrier location mode feedback information unit 10 is used at PUCCH, and the channel condition information of main carrier unit is fed back;
Auxilliary carrier wave location mode feedback information unit 20 is used at PUCCH, by the mode of difference quantization encoding the channel condition information of assisting the carrier wave unit is fed back;
Unit of sub-carriers state information feedback unit 30, be used at PUSCH, according to the difference of the channel condition information of the channel condition information of a plurality of subcarriers in the main carrier unit and main carrier unit, the mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the main carrier unit; According to the difference of channel condition information with the channel condition information of auxilliary carrier wave unit of a plurality of subcarriers in the auxilliary carrier wave unit, the channel condition information of assisting a plurality of subcarriers in the carrier wave unit is fed back by the mode of difference quantization encoding.
Wherein, channel condition information is represented by modulating-coding form MCS grade.
Main carrier location mode feedback information unit 10 specifically is used for: at PUCCH, the coding by regular length (as 5 bit quantizations coding) feeds back the channel condition information of main carrier unit; Or the mode by the difference quantization encoding feeds back the channel condition information of main carrier unit, and is concrete: at fixing one or more special time slots, and the MCS grade of the channel condition information correspondence of feedback main carrier unit; At other transmission time slots, obtain the difference of the MCS grade of the MCS grade of channel condition information correspondence of main carrier unit and special time slot feedback, the absolute value and the positive and negative situation of difference are fed back by the bit of length-specific respectively.
Wherein, auxilliary carrier wave location mode feedback information unit 20 may further include:
The first feedback subelement 21, be used for when the frequency band correlation of main carrier unit and auxilliary carrier wave unit is strong, use the mode of the difference quantization encoding that mixes feedback that the channel condition information of assisting the carrier wave unit is fed back, concrete: as to obtain the MCS grade of the channel condition information correspondence of auxilliary carrier wave unit, the difference of the MCS grade corresponding, the absolute value and the positive and negative situation of difference are fed back by the bit of length-specific respectively with the channel condition information of main carrier unit; And/or
The second feedback subelement 22, be used for when the frequency band correlation of main carrier unit and auxilliary carrier wave unit is more weak, use the mode of the difference quantization encoding that mixes feedback that the channel condition information of assisting the carrier wave unit is fed back, concrete: at fixing one or more special time slots, the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of feedback; At other transmission time slots, obtain the MCS grade of the channel condition information correspondence of assisting the carrier wave unit and the difference of the MCS grade that special time slot feeds back, the absolute value and the positive and negative situation of difference are fed back by the bit of length-specific respectively.
Wherein, unit of sub-carriers state information feedback unit 30 specifically is used for:
MCS grade according to the channel condition information correspondence of the MCS grade of the channel condition information correspondence of previous moment main carrier unit and a plurality of subcarriers of current time, obtain the difference of the MCS grade of the MCS grade of each subcarrier of current time and main carrier unit, the absolute value and the positive and negative situation of difference are fed back by the bit of length-specific respectively;
MCS grade according to the channel condition information correspondence of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of previous moment and a plurality of subcarriers of current time, obtain the difference of the MCS grade of the MCS grade of each subcarrier of current time and auxilliary carrier wave unit, the absolute value and the positive and negative situation of difference are fed back by the bit of length-specific respectively.
Embodiments of the invention also provide a kind of network equipment, as shown in figure 10, comprising:
Main carrier location mode information acquisition unit 40 is used at PUCCH, according to the channel condition information of the main carrier unit that feeds back, obtains the channel condition information of main carrier unit;
Auxilliary carrier wave location mode information acquisition unit 50 is used at PUCCH, and the channel condition information of the auxilliary carrier wave unit that feeds back according to the mode of difference quantization encoding obtains the channel condition information of auxilliary carrier wave unit;
Unit of sub-carriers state information acquisition unit 60, be used at PUSCH, the channel condition information of a plurality of subcarriers in the main carrier unit that feeds back according to the channel condition information of main carrier unit and by the mode of difference quantization encoding obtains the channel condition information of a plurality of subcarriers in the main carrier unit; The channel condition information of a plurality of subcarriers in the auxilliary carrier wave unit that feeds back according to the channel condition information of auxilliary carrier wave unit and by the mode of difference quantization encoding obtains the channel condition information of a plurality of subcarriers in the auxilliary carrier wave unit.
Wherein, channel condition information is represented by modulating-coding form MCS grade.
Wherein, main carrier location mode feedback information unit 40 specifically is used for:
In PUCCH,, obtain the channel condition information of main carrier unit according to the channel condition information of the main carrier unit that feeds back by the coded system of regular length; Or according to the channel condition information of the main carrier unit that feeds back by the mode of difference quantization encoding, obtain the channel condition information of main carrier unit, concrete: as to obtain MCS grade in the channel condition information correspondence of the main carrier unit that fixing one or more special time slots feed back; At other transmission time slots, obtain the absolute value and the positive and negative situation of difference of the MCS grade of the MCS grade of channel condition information correspondence of main carrier unit of feedback and special time slot feedback, obtain the channel condition information of main carrier unit.
Wherein, auxilliary carrier wave location mode information acquisition unit 50 comprises:
First obtains subelement 51, be used for when the frequency band correlation of main carrier unit and auxilliary carrier wave unit is strong, according to the absolute value and the positive and negative situation of the difference of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of the MCS grade of the channel condition information correspondence of main carrier unit and the feedback MCS grade corresponding, obtain the channel condition information of assisting the carrier wave unit with the channel condition information of main carrier unit; And/or
Second obtains subelement 52, is used for when the frequency band correlation of main carrier unit and auxilliary carrier wave unit is more weak, obtains the MCS grade in the channel condition information correspondence of the auxilliary carrier wave unit that fixing one or more special time slots feed back; At other transmission time slots, obtain the absolute value and the positive and negative situation of difference of the MCS grade of the MCS grade of channel condition information correspondence of auxilliary carrier wave unit of feedback and special time slot feedback, obtain the channel condition information of auxilliary carrier wave unit.
Wherein, unit of sub-carriers state information acquisition unit 60 specifically is used for:
According to the absolute value and the positive and negative situation of the difference of the MCS grade of the MCS grade of each subcarrier of current time of the MCS grade of the channel condition information correspondence of previous moment main carrier unit and feedback and main carrier unit, obtain the channel condition information of a plurality of subcarriers in the current time main carrier unit;
According to the MCS grade of each subcarrier of current time of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of previous moment and feedback and the absolute value and the positive and negative situation of the difference of the MCS grade of auxilliary carrier wave unit, obtain the channel condition information that current time is assisted a plurality of subcarriers in the carrier wave unit.
The above-mentioned terminal equipment that the application of the invention provides, under the situation of multi-carrier polymerizing, mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in a plurality of subcarriers and the described auxilliary carrier wave unit in auxilliary carrier wave unit, the main carrier unit, has saved required overhead bit in the channel condition information feedback of a plurality of carrier waves unit.
For example, under the situation of multi-carrier polymerizing, when feeding back according to the broad-band channel state information feedback system of existing LTE system, (5 * N) bits, N are the carrier wave element number of polymerization to needs.When adopting differential feedback mode provided by the invention, the channel condition information for main carrier unit and auxilliary carrier wave unit if differential quantization bit numerical digit is 3 bits, then needs (3 * N+2) bits.Compare with independent broadband feedback, can save (the expense of 2 * N-2) bits.For main carrier unit and auxilliary carrier wave unit sub-carriers location mode information, on Uplink Shared Channel, no longer need to transmit the broad-band channel state information of current time, therefore compared with prior art can save (the expense of 5 * N) bits.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, unit in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the unit in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.A unit can be merged in the unit of the foregoing description, also can further split into a plurality of subelements.
The invention described above embodiment sequence number is not represented the quality of embodiment just to description.

Claims (24)

1. a feedback method of channel status information is characterized in that, comprising:
Go physically among the control channel PUCCH, the channel condition information of main carrier unit is fed back, and the mode by the difference quantization encoding is fed back the channel condition information of auxilliary carrier wave unit;
Among the capable physically shared channel PUSCH, according to the difference of the channel condition information of the channel condition information of a plurality of subcarriers in the described main carrier unit and described main carrier unit, the mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the described main carrier unit; According to the difference of the channel condition information of the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit and described auxilliary carrier wave unit, the mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit.
2. the method for claim 1 is characterized in that, described channel condition information is represented by modulating-coding form MCS grade.
3. method as claimed in claim 2 is characterized in that, described mode by the difference quantization encoding is fed back the channel condition information of described auxilliary carrier wave unit, comprising:
When the frequency band correlation of described main carrier unit and auxilliary carrier wave unit is strong, use the mode of the difference quantization encoding that mixes feedback that the channel condition information of assisting the carrier wave unit is fed back, concrete:
Obtain the difference of the MCS grade of channel condition information correspondence of the auxilliary carrier wave unit MCS grade corresponding, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively with the channel condition information of main carrier unit.
4. method as claimed in claim 2 is characterized in that, described mode by the difference quantization encoding is fed back the channel condition information of described auxilliary carrier wave unit, comprising:
When the frequency band correlation of described main carrier unit and auxilliary carrier wave unit is weak, use the mode of the difference quantization encoding that mixes feedback that the channel condition information of assisting the carrier wave unit is fed back, concrete:
At fixing one or more special time slots, feed back the MCS grade of the channel condition information correspondence of described auxilliary carrier wave unit; At other transmission time slots, obtain the difference of the MCS grade of the MCS grade of channel condition information correspondence of described auxilliary carrier wave unit and described special time slot feedback, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively.
5. method as claimed in claim 2, it is characterized in that, described according to a plurality of subcarriers in the described main carrier unit channel condition information and the difference of the channel condition information of described main carrier unit, mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the described main carrier unit, comprising:
MCS grade according to the channel condition information correspondence of the MCS grade of the channel condition information correspondence of previous moment main carrier unit and a plurality of subcarriers of current time, obtain the difference of the MCS grade of the MCS grade of each subcarrier of current time and main carrier unit, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively;
Described according to a plurality of subcarriers in the described auxilliary carrier wave unit channel condition information and the difference of the channel condition information of described auxilliary carrier wave unit, mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit, comprising:
MCS grade according to the channel condition information correspondence of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of previous moment and a plurality of subcarriers of current time, obtain the difference of the MCS grade of the MCS grade of each subcarrier of current time and auxilliary carrier wave unit, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively.
6. as each described method in the claim 1 to 5, it is characterized in that described channel condition information to the main carrier unit feeds back and comprises:
In PUCCH, coding by regular length or the mode by the difference quantization encoding are fed back the channel condition information of main carrier unit.
7. method as claimed in claim 6 is characterized in that, and is described in PUCCH, and the mode by the difference quantization encoding is fed back the channel condition information of main carrier unit and comprised:
At fixing one or more special time slots, feed back the MCS grade of the channel condition information correspondence of described main carrier unit; At other transmission time slots, obtain the difference of the MCS grade of the MCS grade of channel condition information correspondence of described main carrier unit and described special time slot feedback, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively.
8. the acquisition methods of a channel condition information is characterized in that, comprising:
Go physically among the control channel PUCCH,, obtain the channel condition information of main carrier unit according to the channel condition information of the main carrier unit that feeds back; According to the channel condition information of the auxilliary carrier wave unit that feeds back by the mode of difference quantization encoding, obtain the channel condition information of auxilliary carrier wave unit;
Among the capable physically shared channel PUSCH, the channel condition information of a plurality of subcarriers in the described main carrier unit that feeds back according to the channel condition information of main carrier unit and by the mode of difference quantization encoding obtains the channel condition information of a plurality of subcarriers in the described main carrier unit; The channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit that feeds back according to the channel condition information of auxilliary carrier wave unit and by the mode of difference quantization encoding obtains the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit.
9. method as claimed in claim 8 is characterized in that, described channel condition information is represented by modulating-coding form MCS grade.
10. method as claimed in claim 9 is characterized in that, the channel condition information of the auxilliary carrier wave unit that described basis is fed back by the mode of difference quantization encoding obtains the channel condition information of auxilliary carrier wave unit, comprising:
When the frequency band correlation of described main carrier unit and auxilliary carrier wave unit is strong, according to the absolute value and the positive and negative situation of the difference of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of the MCS grade of the channel condition information correspondence of main carrier unit and the feedback MCS grade corresponding, obtain the channel condition information of assisting the carrier wave unit with the channel condition information of main carrier unit.
11. method as claimed in claim 9 is characterized in that, the channel condition information of the auxilliary carrier wave unit that described basis is fed back by the mode of difference quantization encoding obtains the channel condition information of auxilliary carrier wave unit, comprising:
When the frequency band correlation of described main carrier unit and auxilliary carrier wave unit is weak, obtain MCS grade in the channel condition information correspondence of the described auxilliary carrier wave unit that fixing one or more special time slots feed back; At other transmission time slots, obtain the absolute value and the positive and negative situation of difference of the MCS grade of the MCS grade of channel condition information correspondence of described auxilliary carrier wave unit of feedback and described special time slot feedback, obtain the channel condition information of auxilliary carrier wave unit.
12. method as claimed in claim 9, it is characterized in that, described according to the main carrier unit channel condition information and the described main carrier unit that feeds back by the mode of difference quantization encoding in the channel condition information of a plurality of subcarriers, obtain the channel condition information of a plurality of subcarriers in the described main carrier unit, comprising:
According to the absolute value and the positive and negative situation of the difference of the MCS grade of the MCS grade of each subcarrier of current time of the MCS grade of the channel condition information correspondence of previous moment main carrier unit and feedback and main carrier unit, obtain the channel condition information of a plurality of subcarriers in the described main carrier of the current time unit;
The channel condition information of a plurality of subcarriers in the channel condition information of the auxilliary carrier wave unit of described basis and the described auxilliary carrier wave unit that feeds back by the mode of difference quantization encoding obtains the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit, comprising:
According to the absolute value and the positive and negative situation of the difference of the MCS grade of the MCS grade of each subcarrier of current time of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of previous moment and feedback and auxilliary carrier wave unit, obtain the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave of the current time unit.
13., it is characterized in that the channel condition information of described main carrier unit according to feedback, the channel condition information that obtains the main carrier unit comprise as each described method in the claim 8 to 12:
In PUCCH, the channel condition information of the main carrier unit that feeds back according to the coding by regular length or by the mode of difference quantization encoding obtains the channel condition information of main carrier unit.
14. method as claimed in claim 13, it is characterized in that, described in PUCCH, the channel condition information of the main carrier unit that feeds back according to the coding by regular length or by the mode of difference quantization encoding, the channel condition information that obtains the main carrier unit comprises:
Obtain MCS grade in the channel condition information correspondence of the described main carrier unit that fixing one or more special time slots feed back; At other transmission time slots, obtain the absolute value and the positive and negative situation of difference of the MCS grade of the MCS grade of channel condition information correspondence of described main carrier unit of feedback and described special time slot feedback, obtain the channel condition information of main carrier unit.
15. a terminal equipment is characterized in that, comprising:
Main carrier location mode feedback information unit is used at PUCCH, and the channel condition information of main carrier unit is fed back;
Auxilliary carrier wave location mode feedback information unit is used at PUCCH, by the mode of difference quantization encoding the channel condition information of assisting the carrier wave unit is fed back;
Unit of sub-carriers state information feedback unit, be used at PUSCH, according to the difference of the channel condition information of the channel condition information of a plurality of subcarriers in the described main carrier unit and described main carrier unit, the mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the described main carrier unit; According to the difference of the channel condition information of the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit and described auxilliary carrier wave unit, the mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit.
16. terminal equipment as claimed in claim 15 is characterized in that, described channel condition information is represented by modulating-coding form MCS grade.
17. terminal equipment as claimed in claim 16 is characterized in that, described auxilliary carrier wave location mode feedback information unit comprises:
The first feedback subelement, be used for frequency band correlation when strong in described main carrier unit and auxilliary carrier wave unit, use the mode of the difference quantization encoding that mixes feedback that the channel condition information of assisting the carrier wave unit is fed back, concrete: as to obtain the difference of the MCS grade of channel condition information correspondence of the auxilliary carrier wave unit MCS grade corresponding, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively with the channel condition information of main carrier unit; And/or
The second feedback subelement, when being used for a little less than the frequency band correlation of described main carrier unit and auxilliary carrier wave unit, use the mode of the difference quantization encoding that mixes feedback that the channel condition information of assisting the carrier wave unit is fed back, concrete: at fixing one or more special time slots, feed back the MCS grade of the channel condition information correspondence of described auxilliary carrier wave unit; At other transmission time slots, obtain the difference of the MCS grade of the MCS grade of channel condition information correspondence of described auxilliary carrier wave unit and described special time slot feedback, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively.
18. terminal equipment as claimed in claim 16 is characterized in that, described unit of sub-carriers state information feedback unit specifically is used for:
MCS grade according to the channel condition information correspondence of the MCS grade of the channel condition information correspondence of previous moment main carrier unit and a plurality of subcarriers of current time, obtain the difference of the MCS grade of the MCS grade of each subcarrier of current time and main carrier unit, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively;
MCS grade according to the channel condition information correspondence of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of previous moment and a plurality of subcarriers of current time, obtain the difference of the MCS grade of the MCS grade of each subcarrier of current time and auxilliary carrier wave unit, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively.
19., it is characterized in that described main carrier location mode feedback information unit specifically is used for as each described terminal equipment in the claim 15 to 18:
In PUCCH, the coding by regular length feeds back the channel condition information of main carrier unit; Or the mode by the difference quantization encoding feeds back the channel condition information of main carrier unit, and is concrete: as at fixing one or more special time slots, to feed back the MCS grade of the channel condition information correspondence of described main carrier unit; At other transmission time slots, obtain the difference of the MCS grade of the MCS grade of channel condition information correspondence of described main carrier unit and described special time slot feedback, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively.
20. a network equipment is characterized in that, comprising:
Main carrier location mode information acquisition unit is used at PUCCH, according to the channel condition information of the main carrier unit that feeds back, obtains the channel condition information of main carrier unit;
Auxilliary carrier wave location mode information acquisition unit is used at PUCCH, according to the channel condition information of the auxilliary carrier wave unit that feeds back by the mode of difference quantization encoding, obtains the channel condition information of auxilliary carrier wave unit;
Unit of sub-carriers state information acquisition unit, be used at PUSCH, the channel condition information of a plurality of subcarriers in the described main carrier unit that feeds back according to the channel condition information of main carrier unit and by the mode of difference quantization encoding obtains the channel condition information of a plurality of subcarriers in the described main carrier unit; The channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit that feeds back according to the channel condition information of auxilliary carrier wave unit and by the mode of difference quantization encoding obtains the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit.
21. network equipment as claimed in claim 20 is characterized in that, described channel condition information is represented by modulating-coding form MCS grade.
22. network equipment as claimed in claim 21 is characterized in that, described auxilliary carrier wave location mode information acquisition unit comprises:
The first feedback subelement, be used for frequency band correlation when strong in described main carrier unit and auxilliary carrier wave unit, according to the absolute value and the positive and negative situation of the difference of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of the MCS grade of the channel condition information correspondence of main carrier unit and the feedback MCS grade corresponding, obtain the channel condition information of assisting the carrier wave unit with the channel condition information of main carrier unit; And/or
The second feedback subelement when being used for a little less than the frequency band correlation of described main carrier unit and auxilliary carrier wave unit, obtains the MCS grade in the channel condition information correspondence of the described auxilliary carrier wave unit that fixing one or more special time slots feed back; At other transmission time slots, obtain the absolute value and the positive and negative situation of difference of the MCS grade of the MCS grade of channel condition information correspondence of described auxilliary carrier wave unit of feedback and described special time slot feedback, obtain the channel condition information of auxilliary carrier wave unit.
23. network equipment as claimed in claim 21 is characterized in that, described unit of sub-carriers state information acquisition unit specifically is used for:
According to the absolute value and the positive and negative situation of the difference of the MCS grade of the MCS grade of each subcarrier of current time of the MCS grade of the channel condition information correspondence of previous moment main carrier unit and feedback and main carrier unit, obtain the channel condition information of a plurality of subcarriers in the described main carrier of the current time unit;
According to the absolute value and the positive and negative situation of the difference of the MCS grade of the MCS grade of each subcarrier of current time of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of previous moment and feedback and auxilliary carrier wave unit, obtain the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave of the current time unit.
24., it is characterized in that described main carrier location mode feedback information unit specifically is used for as each described network equipment in the claim 21 to 23:
In PUCCH,, obtain the channel condition information of main carrier unit according to the channel condition information of the main carrier unit that feeds back by the coded system of regular length; Or according to the channel condition information of the main carrier unit that feeds back by the mode of difference quantization encoding, obtain the channel condition information of main carrier unit, concrete: as to obtain MCS grade in the channel condition information correspondence of the described main carrier unit that fixing one or more special time slots feed back; At other transmission time slots, obtain the absolute value and the positive and negative situation of difference of the MCS grade of the MCS grade of channel condition information correspondence of described main carrier unit of feedback and described special time slot feedback, obtain the channel condition information of main carrier unit.
CN200910092380.5A 2009-09-11 2009-09-11 Feedback method and equipment for channel state information Expired - Fee Related CN102026280B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
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WO2011140982A1 (en) * 2010-08-12 2011-11-17 华为技术有限公司 Method, user equipment and base station for feeding back and obtaining channel state information of a plurality of component carriers
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CN103166734B (en) * 2011-12-14 2017-08-25 华为技术有限公司 The acquisition methods and device of channel condition information
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CN104185215A (en) * 2013-05-22 2014-12-03 普天信息技术研究院有限公司 Merging processing method for control information
CN104185215B (en) * 2013-05-22 2017-11-14 普天信息技术研究院有限公司 The merging treatment method of control information
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