CN102291225B

CN102291225B - Channel state information periodic feedback method and device

Info

Publication number: CN102291225B
Application number: CN2011102405954A
Authority: CN
Inventors: 荆梅芳; 苏昕; 张然然; 拉盖施; 沈祖康
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2011-08-19
Filing date: 2011-08-19
Publication date: 2013-12-04
Anticipated expiration: 2031-08-19
Also published as: CN102291225A

Abstract

The invention discloses a channel state information periodic feedback method and a device, which relate to the communication technology. The channel state information periodic feedback method provided by the embodiment of the invention comprises the following steps of: determining channel state information according to a channel state information feedback mode, wherein the channel state information comprises the channel state information for PDSCH (Physical Downlink Shared Channel) transmission feedback and the channel state information for other channel transmission feedback; and feeding back the channel state information to a base station. The channel state information not only includes the channel state information for the PDSCH transmission feedback, but also includes feedback to the channel state information of other channels, such as a PDCCH (Physical Downlink Control Channel) and the like, so that the base station can conveniently acquire channel conditions of other channels so as to implement better support to other channels.

Description

A kind of channel state information periodic feedback method and device

Technical field

The present invention relates to the communication technology, relate in particular to a kind of channel state information periodic feedback method and device.

Background technology

At LTE(Long Term Evolution, Long Term Evolution) in system, Physical Downlink Control Channel (PDCCH, physical downlink control channel) in each wireless sub-frame, sent, and with Physical Downlink Shared Channel (physical downlink shared channel, PDSCH) form TDM(Time Division Multiple, time division multiplexing) multiplexing relation.As shown in Figure 1, PDCCH is by the top n OFDM(Orthogonal Frequency Division Multiplex of a descending sub frame, OFDM) the symbol transmission, wherein the possible value of N is 1,2,3,4, and N=4 only allows to appear in the system that system bandwidth is 1.4MHz.

In the LTE system, the control area of transmission PDCCH is the CCE(control channel element by logical partitioning, the control channel unit) form, wherein CCE is to RE(resource element, the least resource unit) mapping adopted the mode interweaved fully.Downlink Control Information (downlink control information, DCI) it is unit that transmission also is based on CCE, the DCI for a UE can be sent in M continuous CCE, in the LTE system, the possible value of M is 1,2,4,8, be called CCE polymerization grade (Aggregation Level).

UE(User Equipment, subscriber equipment) after receiving radio frames, carry out the PDCCH blind check in control area, whether search exists the PDCCH for its transmission, blind check is used the RNTI(radio network temporary identifier of this UE, the wireless network temporary indentification) to the trial of decoding of different DCI forms and CCE polymerization grade, if decoding is correct, receive the DCI for this UE.LTE UE is at non-DRX(Discontinuous Reception, discontinuous reception) each descending sub frame in state needs blind check is carried out in control area, search PDCCH.

Due to MU-MIMO(multi-user multiple input multiple output, multi-user's multiple-input and multiple-output), CoMP(cooperative multiple points, coordinate multipoint), the RRH(remote radio head of the technology He Tong community ID such as carrier aggregation, the radio remote termination), the introducing of the configuration such as 8 antennas, LTE-A(Long Term Evolution Advanced, follow-up Long Term Evolution) capacity and the efficiency of transmission of the Physical Downlink Shared Channel of system are significantly promoted; And relatively early stage LTE version (as Rel-8/9), the PDCCH of LTE-A system does not but benefit from new technology and obtains lifting.

On the one hand, the application of new technology makes the PDSCH can be simultaneously for more users provide transfer of data, and this will improve the demand to the PDCCH channel capacity greatly; On the other hand, the DM-RS(Demodulation Reference Symbol applied in PDSCH, demodulation reference mark) with at Relay backhaul(relay backhaul) in the R-PDCCH(Relay PDCCH of application) etc. new technology be PDCCH enhancing provides governed technology and experience.

Limited in order to solve the down control channel capacity, and the efficiency of transmission of raising Downlink Control Information, a solution is: send the PDCCH strengthened in PDSCH territory when retaining original PDCCH territory in descending sub frame, as shown in Figure 2.

Original PDCCH territory still adopts existing sending and receiving technology, use original PDCCH resource, send diversity as adopted while sending, during reception based on CRS(Cell-specific Reference Signal, the cell-level reference signal) adopt the blind check technology, at public search space and user-specific search volume, DCI is carried out to blind check, and take top n OFDM symbol and send, wherein the possible value of N is 1,2,3,4, and N=4 only allows to appear in the system that system bandwidth is 1.4MHz, this part PDCCH territory is called the original PDCCH of legacy PDCCH() territory.

More advanced sending and receiving technology can be used in the PDCCH territory strengthened, as adopt precoding while sending, during reception, based on DM-RS, detected, taking legacy PDCCH territory running time-frequency resource in addition sends, use the part resource of original PDSCH, mode with PDSCH by frequency division realizes multiplexing, and this part PDCCH territory is called Enhanced PDCCH(and strengthens PDCCH) territory.This Enhanced PDCCH and PDSCH realize that by the frequency division mode multiplexing scheme is called FDM E-PDCCH(frequency division multiplexing E-PDCCH).

The resource location that PDSCH is used can be indicated by the Downlink Control Information DCI in PDCCH, and for the PDCCH strengthened, a kind of method is the resource location that can only indicate E-PDCCH to use by high-level signaling.Because the mutual cycle of high-level signaling is longer, if indicate definite E-PDCCH resource location by high-level signaling, can make E-PDCCH can't fully obtain the frequency selectivity gain.So generally, high-level signaling can distribute one group of available resources for E-PDCCH, and the channel condition information that base station can be fed back based on UE in transmission is selected the part resource for E-PDCCH in the available resources scope of high level configuration.When UE carries out the reception of E-PDCCH resource, can in the available resources scope of high level configuration, carry out the E-PDCCH blind check.Thereby obtain the compromise of blind check complexity and the scheduling degree of freedom.

Support to strengthen the PDCCH transmission, need corresponding information feedback.As channel quality indication (channel quality indicator, CQI), for the user, dispatch, determine the polymerization grade, adjust Modulation and Coding Scheme (modulation and coding scheme, MCS) and MU-MIMO pairing situation etc.; Pre-coding matrix indication (precoding matrix indicator, PMI), for determining wave beam forming, multi-subscriber dispatching and MU-MIMO pairing etc.; RI(Rank Index order index value) information, the number of plies of using for the specified data transmission etc.

But the present inventor finds, supports 4 kinds of channel state information periodic feedback patterns in the LTE/LTE-A system at present, as shown in table 1.

CQI and PMI feedback kind in table 1:PUCCH reporting source of channel state information pattern

Wherein, pattern 1-0 supports broadband CQI feedback, pattern 1-1 comprises 2 subpatterns, support RI, broadband P MI and broadband CQI feedback, subband CQI and broadband CQI that pattern 2-0 selects for feedback user, pattern 2-1 is for feeding back RI and broadband P MI or broadband CQI, subband CQI or subband PMI information.These feedback models, all for existing PDSCH Transmission Design, can't provide PMI and/or the CQI information that the frequency domain granularity is less for E-PDCCH, can not support well the transmission of Enhanced PDCCH.

Summary of the invention

The embodiment of the present invention provides a kind of channel state information periodic feedback method and device, to realize the better support to other channel.

A kind of channel state information periodic feedback method comprises:

According to information feedback mode decision channel condition information, described channel condition information comprises for the channel condition information of Physical Downlink Shared Channel PDSCH transmission feedback and for the channel condition information that strengthens Physical Downlink Control Channel E-PDCCH transmission feedback;

To the described channel condition information of base station feedback.

A kind of channel state information periodic feedback method comprises:

Determine the RI value and the RI value that strengthens Physical Downlink Control Channel E-PDCCH of Physical Downlink Shared Channel PDSCH;

According to information feedback mode decision channel condition information, and, when the RI of Physical Downlink Shared Channel PDSCH value and the RI value that strengthens Physical Downlink Control Channel E-PDCCH are unequal, described channel condition information comprises the channel condition information for E-PDCCH transmission feedback;

To the described channel condition information of base station feedback.

A kind of channel state information periodic feedback method comprises:

The channel condition information of receiving terminal feedback, described channel condition information comprises: for the channel condition information of Physical Downlink Shared Channel PDSCH transmission feedback and for the channel condition information that strengthens Physical Downlink Control Channel E-PDCCH transmission feedback;

According to described channel condition information, described terminal is dispatched.

A kind of channel state information periodic feedback device comprises:

Determining unit, be used for according to information feedback mode decision channel condition information, described channel condition information comprises the channel condition information that transmission is fed back for Physical Downlink Shared Channel PDSCH and transmits for strengthening Physical Downlink Control Channel E-PDCCH the channel condition information fed back:

Feedback unit, for to the described channel condition information of base station feedback.

A kind of channel state information periodic feedback device comprises:

Receiving element, for the channel condition information of receiving terminal feedback, described channel condition information comprises: for the channel condition information of Physical Downlink Shared Channel PDSCH transmission feedback and for the channel condition information that strengthens Physical Downlink Control Channel E-PDCCH transmission feedback;

Scheduling unit, for being dispatched described terminal according to described channel condition information.

The embodiment of the present invention provides a kind of channel state information periodic feedback method and device, in channel condition information, except comprising for PDSCH, transmit the channel condition information of feedback, also increased the feedback to the channel condition information of other channels such as E-PDCCH, thereby be convenient to the channel situation that base station obtains other channel, thereby realize the better support to other channel.

The accompanying drawing explanation

Fig. 1 is the multiplexing schematic diagram that concerns of control area and data area in descending sub frame in prior art;

Fig. 2 is possible E-PDCCH position view;

One of channel state information periodic feedback method flow chart that Fig. 3 provides for the embodiment of the present invention;

Two of the channel state information periodic feedback method flow chart that Fig. 4 provides for the embodiment of the present invention;

Three of the channel state information periodic feedback method flow chart that Fig. 5 provides for the embodiment of the present invention;

One of channel state information periodic feedback apparatus structure schematic diagram that Fig. 6 provides for the embodiment of the present invention;

Two of the channel state information periodic feedback apparatus structure schematic diagram that Fig. 7 provides for the embodiment of the present invention;

Three of the channel state information periodic feedback apparatus structure schematic diagram that Fig. 8 provides for the embodiment of the present invention.

Embodiment

As shown in Figure 3, the channel state information periodic feedback method that the embodiment of the present invention provides comprises:

Step S301, according to information feedback mode decision channel condition information, wherein, channel condition information comprises for the channel condition information of Physical Downlink Shared Channel PDSCH transmission feedback and the channel condition information fed back for other transmission;

Step S302, to the base station feedback channel condition information.

In embodiments of the present invention, the channel condition information fed back for other transmission can be for the channel condition information that strengthens Physical Downlink Control Channel E-PDCCH transmission feedback, can be also the channel condition information for other cell channel feedback.In embodiments of the present invention, mainly take and describe as example for the channel condition information of E-PDCCH transmission feedback.

When channel condition information comprises the channel condition information that transmission is fed back for E-PDCCH, base station, after receiving the channel condition information that terminal feeds back, can further be dispatched according to the correlated channels state information of the E-PDCCH in channel condition information.

Further, due to when carrying out information feedback, for the feedback of E-PDCCH transmission during based on low Rank value, base station is better to the support effect of E-PDCCH, so be specially RI value for the E-PDCCH of E-PDCCH transmission feedback for the feedback of E-PDCCH transmission, to be less than or equal to the channel condition information of 2 o'clock better.

In order to reduce the transmission quantity of channel condition information, when the RI of E-PDCCH value equals 1, can in channel condition information, not feed back the RI value of E-PDCCH, if base station can not find the RI value of E-PDCCH in the channel condition information for E-PDCCH transmission feedback, think that the RI value of E-PDCCH equals 1, when the RI value is greater than 1, need to comprise at the channel condition information for strengthening Physical Downlink Control Channel E-PDCCH transmission feedback the RI value of E-PDCCH.

Due to when carrying out information feedback, the effect of the situation feedback that is 1 for the RI of E-PDCCH can be better, equal at 1 o'clock so be set to the RI value, at the channel condition information for strengthening Physical Downlink Control Channel E-PDCCH transmission feedback, do not comprise that the RI value of E-PDCCH is better, certainly, according to used scene, in the time of also can being set to the RI value and equaling other certain value, at the channel condition information for strengthening Physical Downlink Control Channel E-PDCCH transmission feedback, do not comprise the RI value of E-PDCCH.

Below according to the content increased in feedback model and channel condition information, describe respectively:

The content increased in channel condition information can comprise: the subband PMI of subband CQI, the E-PDCCH of E-PDCCH, the K-subband PMI of broadband P MI, the E-PDCCH of broadband CQI, the E-PDCCH of E-PDCCH, can also comprise the broadband RI of E-PDCCH.Wherein, the subband of E-PDCCH is: M subband bandwidth or M the system subband bandwidth of dividing the E-PDCCH available resources formation of high-rise configuration, M >=1, the broadband of E-PDCCH is: total bandwidth or the system bandwidth of the E-PDCCH available resources of high-rise configuration, the K-subband of E-PDCCH is continuous K bandwidth corresponding to E-PDCCH subband, K > 1, E-PDCCH broadband RI<=N, particularly, N=2, generally, when the E-PDCCH available resources formation subband of dividing high-rise configuration just overlaps with the system subband, can regard the subband of E-PDCCH as the system subband, in embodiments of the present invention, for ease of distinguishing, the E-PDCCH available resources that unification will be divided high-rise configuration form the subband that subband is called E-PDCCH, the broadband that the E-PDCCH available resources is called to E-PDCCH.

The content of whether feeding back increase when the feedback model that base station is fed back and feedback can configure by high-level signaling.

Increased content is classified, can be divided into Type a, Type b, Type c, Type d, Type e, Type f six class Report Types:

Type a: the feedback of supporting the broadband RI of E-PDCCH;

Type b: support the feedback of the subband CQI of E-PDCCH, can also comprise the subband positional information of indicating the subband position, by the information bit L that indicates the subband position, can determine the corresponding subband of subband CQI information that UE feeds back;

Type c: support the subband CQI of E-PDCCH and the feedback of subband PMI, can also comprise the information bit L that indicates the subband position;

Type d: support the subband CQI of E-PDCCH and the feedback of K-subband PMI;

Type e: the feedback of supporting the broadband CQI of E-PDCCH;

Type f: support the broadband CQI of E-PDCCH and the feedback of broadband P MI;

Wherein, the cycle of every kind of Type and side-play amount can be configured separately by high-level signaling.

When the information feedback pattern is pattern 1-0, channel condition information comprises: for the broadband CQI of PDSCH feedback, when needs feedback E-PDCCH channel condition information, can increase the content of Type b type and/or Type e, increase subband CQI information and/or the E-PDCCH broadband CQI information of one or more E-PDCCH in channel condition information.

When the information feedback pattern is pattern 2-0, channel condition information comprises: broadband CQI and selected subband CQI.When needs feedback E-PDCCH channel condition information, can increase equally the content of Type b type and/or Type e type, increase subband CQI information and/or the E-PDCCH broadband CQI information of one or more E-PDCCH in channel condition information.

When the information feedback pattern is pattern 1-1, channel condition information comprises: order index value RI, broadband pre-coding matrix indication PMI and broadband CQI.When needs feedback E-PDCCH channel condition information, usually also need to feed back PMI information, concrete, comprise following several mode:

1) increase the content of Type c type, increase subband CQI information and the subband PMI information of one or more E-PDCCH in channel condition information.

2) increase the content of Type d type, increase the PMI information of continuous K subband in E-PDCCH in channel condition information, i.e. E-PDCCH K-subband PMI, and K the subband CQI information that increases E-PDCCH, wherein, and K > 1.The K-subband fed back can be arranged in advance, also can adopt the repeating query pattern to determine, particularly, adopt the repeating query pattern to be: the E-PDCCH subband, according to one group of K subband, to be divided into to many groups, to report for the first time first group, report for the second time second group, the rest may be inferred.

3) increase the content of Type b type, increase one or more E-PDCCH subband CQI information in channel condition information, now, do not report the PMI information of E-PDCCH, so when definite subband CQI information, when perhaps PMI information need to be determined in base station, can suppose as follows: when the system RI=1 that reports, the subband PMI that can suppose E-PDCCH is system broad or PMI corresponding to affiliated system subband; As the system RI reported > 1 the time, base station supposes that the subband PMI of E-PDCCH is system broad or PMI corresponding to affiliated system subband, and concrete pre-coding matrix is a certain row in the pre-coding matrix that this PMI is corresponding.

When selecting pre-coding matrix, adopt the row that in the pre-coding matrix that PMI is corresponding, larger CQI is corresponding better.

4) increase the content of Type a and Type c type, the number of data layers of the content of Type a type for reporting E-PDCCH to support, be the RI value of E-PDCCH, the content of Type c type is for subband CQI information and the subband PMI information of one or more E-PDCCH of reporting the RI that reports based on Typea to calculate.

5) increase the content of Type a and Type d type, the number of data layers of the content of Type a type for reporting E-PDCCH to support, it is the RI value of E-PDCCH, the content of Type d type is for K subband CQI information of the E-PDCCH that reports the RI that reports based on Typea to calculate and the K-subband PMI information of E-PDCCH, be the PMI information of continuous K subband of the RI value based on E-PDCCH in E-PDCCH, K > 1.

6) increase the content of Type a and Type b type, the number of data layers of the content of Type a type for reporting E-PDCCH to support, be the RI value of E-PDCCH, the content of Type b type is for one or more subband CQI information of the E-PDCCH that reports the RI that reports based on Typea to calculate.Now, do not report the PMI information of E-PDCCH, so when definite subband CQI information, when perhaps PMI information need to be determined in base station, can suppose as follows: when the system RI reported equals RI that Type a reports, base station can suppose that the subband PMI of E-PDCCH is system broad or PMI corresponding to affiliated system subband; When the system RI reported is greater than the RI that Type a reports, base station supposes that the subband PMI of E-PDCCH is system broad or PMI corresponding to affiliated system subband, now, concrete pre-coding matrix is the P row in the pre-coding matrix that this PMI is corresponding, for example can adopt the P that larger CQI is corresponding to be listed as pre-coding matrix, wherein P >=1.

7) increase the content of Type f type, increase the broadband CQI information of an E-PDCCH and the broadband P MI information of E-PDCCH in channel condition information.

8) increase the content of Type f and Type b type, the content of Type f type is for reporting the broadband CQI information of E-PDCCH and the broadband P MI information of E-PDCCH, and the content of Type b type is for the subband CQI information of one or more E-PDCCH of reporting the PMI that reports based on Type f to calculate.

9) increase the content of Type f and Type c type, the content of Type f type is for reporting the broadband CQI information of E-PDCCH and the broadband P MI information of E-PDCCH, the content of Type c type is calculated for reporting one or more E-PDCCH subband CQI information and E-PDCCH subband PMI information, this E-PDCCH subband CQI information to be based on E-PDCCH subband PMI information.

Can be when the RI of E-PDCCH value be less than for the RI value in the channel condition information of PDSCH transmission feedback, just increase the Report Type of type e or increase type f, now can save the data volume in channel condition information, certainly, also can increase the Report Type of type e or increase type f when the RI of E-PDCCH value equals for the RI value in the channel condition information of PDSCH transmission feedback, thereby obtain preferably feedback effects.

In fact, the content increased can select a type to feed back sub-band information from Type b and Type c, from Type e and Type f, select a type to feed back wide-band-message, and increase where necessary Type c type and further feed back sub-band information, and be not to increase Type a type feedback RI value at 1 o'clock at the RI of E-PDCCH.Like this, the content increased had both comprised sub-band information, had also comprised wide-band-message, and the channel condition information of feedback is more comprehensive, certainly, when practical application, also can only feed back sub-band information or only feed back wide-band-message according to actual conditions.

When feed back the broadband CQI information of E-PDCCH by Type e type, and while not feeding back PMI information, need to be supposed PMI information, concrete:

When the RI value of determining E-PDCCH is 1 and the RI value of PDSCH while being 1, the broadband P MI information of determining E-PDCCH is the broadband P MI information in the channel condition information for PDSCH transmission feedback, and the broadband P MI information based on this E-PDCCH is determined the broadband CQI information for E-PDCCH transmission feedback;

When the RI value of determining E-PDCCH is 1 and the RI value of PDSCH while being greater than 1, the broadband P MI information of determining E-PDCCH is the broadband P MI information in the channel condition information for PDSCH transmission feedback, and the row in pre-coding matrix corresponding to the PMI that definite pre-coding matrix is this E-PDCCH, and the broadband P MI information based on this E-PDCCH is determined the broadband CQI information for E-PDCCH transmission feedback.

When the RI value of determining E-PDCCH is greater than 1 and the RI value of PDSCH while equaling the RI value of E-PDCCH, the broadband P MI information of determining E-PDCCH is the broadband P MI information in the channel condition information for PDSCH transmission feedback, and the broadband P MI information based on this E-PDCCH is determined the broadband CQI information for E-PDCCH transmission feedback;

When the RI value of determining E-PDCCH is greater than 1 and the RI value of PDSCH while being greater than the RI value of E-PDCCH, the broadband P MI information of determining E-PDCCH is the broadband P MI information in the channel condition information for PDSCH transmission feedback, and the row of the P in pre-coding matrix corresponding to the PMI that definite pre-coding matrix is this E-PDCCH, and the broadband P MI information based on this E-PDCCH is determined the broadband CQI information for E-PDCCH transmission feedback, P >=1;

Equally, when feed back the subband CQI information of E-PDCCH by Type b type, and while not feeding back PMI information, also need PMI information is supposed, concrete:

When the RI value of determining E-PDCCH is 1 and the RI value of PDSCH while being 1, the subband PMI information of determining E-PDCCH is broadband P MI information or subband PMI information in the channel condition information for PDSCH transmission feedback, and the subband PMI information based on this E-PDCCH is determined the subband CQI information for E-PDCCH transmission feedback;

When the RI value of determining E-PDCCH is 1 and the RI value of PDSCH while being greater than 1, the subband PMI information of determining E-PDCCH is broadband P MI information or subband PMI information in the channel condition information for PDSCH transmission feedback, and the row in pre-coding matrix corresponding to the PMI that definite pre-coding matrix is this E-PDCCH, and the subband PMI information based on this E-PDCCH is determined the subband CQI information for E-PDCCH transmission feedback.

When the RI value of determining E-PDCCH is greater than 1 and the RI value of PDSCH while equaling the RI value of E-PDCCH, the subband PMI information of determining E-PDCCH is broadband P MI information or subband PMI information in the channel condition information for PDSCH transmission feedback, and the subband PMI information based on this E-PDCCH is determined the subband CQI information for E-PDCCH transmission feedback;

When the RI value of determining E-PDCCH is greater than 1 and the RI value of PDSCH while being greater than the RI value of E-PDCCH, the subband PMI information of determining E-PDCCH is broadband P MI information or subband PMI information in the channel condition information for PDSCH transmission feedback, and the row of the P in pre-coding matrix corresponding to the PMI that definite pre-coding matrix is this E-PDCCH, and the subband PMI information based on this E-PDCCH is determined the subband CQI information for E-PDCCH transmission feedback, P >=1.

Wherein, determine the row in the pre-coding matrix that PMI that pre-coding matrix is this E-PDCCH is corresponding, can determine row of CQI maximum corresponding in the pre-coding matrix that PMI that pre-coding matrix is this E-PDCCH is corresponding; Determine the P row in the pre-coding matrix that PMI that pre-coding matrix is this E-PDCCH is corresponding, can determine the P row of CQI maximum corresponding in the pre-coding matrix that PMI that pre-coding matrix is this E-PDCCH is corresponding, thereby guarantee preferably laser propagation effect.

When the information feedback pattern is pattern 2-1, channel condition information comprises: the broadband P MI of order index value RI, PDSCH or the subband PMI of broadband CQI, PDSCH or subband CQI.When needs feedback E-PDCCH channel condition information, similar to pattern 1-1, comprise equally following several mode:

1) increase the content of Type c type, increase subband CQI information and the E-PDCCH subband PMI information of one or more E-PDCCH in channel condition information.

2) increase the content of Type d type, increase the PMI information of continuous K subband in E-PDCCH in channel condition information, i.e. E-PDCCH K-subband PMI, and K the subband CQI information that increases E-PDCCH, wherein, and K > 1.The K-subband fed back can be arranged in advance, also can adopt the repeating query pattern to determine.

3) increase the content of Type b type, increase one or more E-PDCCH subband CQI information in channel condition information, now, do not report the PMI information of E-PDCCH, so when definite subband CQI information, when perhaps PMI information need to be determined in base station, can suppose as follows: when the system RI=1 that reports, the subband PMI that can suppose E-PDCCH is system broad or PMI corresponding to affiliated system subband; As the system RI reported > 1 the time, the subband PMI that supposes E-PDCCH is system broad or PMI corresponding to affiliated system subband, and concrete pre-coding matrix is a certain row in the pre-coding matrix that this PMI is corresponding.

9) increase the content of Type f and Type c type, the content of Type f type is for reporting the broadband CQI information of E-PDCCH and the broadband P MI information of E-PDCCH, the content of Type c type is for reporting subband CQI information and the subband PMI information of one or more E-PDCCH, and this E-PDCCH subband CQI information is based on E-PDCCH subband PMI information and calculates.

Further, when the RI of E-PDCCH and PDSCH value is identical, can only feed back the channel condition information of E-PDCCH, or only feed back the channel condition information of PDSCH.Thereby further reduce the data volume of channel condition information, and then reduce system burden.

Now, as shown in Figure 4, the channel state information periodic feedback method that the embodiment of the present invention provides comprises:

Step S401, determine the RI value of PDSCH and the RI value of E-PDCCH;

Step S402, according to the feedback model of channel condition information, determine channel condition information, and, when the RI of the RI of PDSCH value and E-PDCCH value is unequal, at channel condition information, comprise the channel condition information for E-PDCCH transmission feedback;

Step S403, to the base station feedback channel condition information.

When the RI of the RI of PDSCH value and E-PDCCH value is unequal, at channel condition information except the channel condition information that comprises PDSCH, also need to comprise the channel condition information for E-PDCCH transmission feedback, concrete implementation is identical with last embodiment, repeats no more.When the RI of PDSCH value equates with the RI value of E-PDCCH, only include for one of the channel condition information of PDSCH transmission feedback and channel condition information that transmission is fed back for E-PDCCH and get final product.

From the angle of base station, as shown in Figure 5, the channel state information periodic feedback method that the embodiment of the present invention provides comprises:

The channel condition information of step S501, receiving terminal feedback, this channel condition information comprises: for the channel condition information of PDSCH transmission feedback and the channel condition information fed back for other transmission;

Step S502, according to channel condition information, terminal is dispatched.

Wherein, the channel condition information fed back for other transmission can be for the channel condition information that strengthens Physical Downlink Control Channel E-PDCCH transmission feedback, can be also the channel condition information for other cell channel feedback.In embodiments of the present invention, mainly take and describe as example for the channel condition information of E-PDCCH transmission feedback.

The Report Type that the feedback model that terminal is concrete and channel condition information comprise is identical with previous embodiment, does not repeat them here.

When the channel condition information for PDSCH transmission feedback comprises PMI information, and while in the channel condition information for E-PDCCH transmission feedback, not comprising the PMI information of E-PDCCH,, in step S502, before according to channel condition information, terminal being dispatched, also comprise:

When channel condition information comprises the broadband CQI information for E-PDCCH transmission feedback:

When the RI value of determining E-PDCCH is 1 and the RI value of PDSCH while being 1, determine that the broadband P MI information of E-PDCCH is for transmitting the broadband P MI information in the channel condition information fed back for PDSCH;

When the RI value of determining E-PDCCH is 1 and the RI value of PDSCH while being greater than 1, the broadband P MI information of determining E-PDCCH is the broadband P MI information in the channel condition information for PDSCH transmission feedback, and the row in pre-coding matrix corresponding to definite pre-coding matrix broadband P MI that is this E-PDCCH.

When the RI value of determining E-PDCCH is greater than 1 and the RI value of PDSCH while equaling the RI value of E-PDCCH, the broadband P MI information of determining E-PDCCH is to transmit the broadband P MI information in the channel condition information fed back for PDSCH;

When the RI value of determining E-PDCCH is greater than 1 and the RI value of PDSCH while being greater than the RI value of E-PDCCH, the broadband P MI information of determining E-PDCCH is the broadband P MI information in the channel condition information for PDSCH transmission feedback, and the row of the P in pre-coding matrix corresponding to the broadband P MI that definite pre-coding matrix is this E-PDCCH, P >=1;

When channel condition information comprises the subband CQI information that transmission is fed back for E-PDCCH:

When the RI value of determining E-PDCCH is 1 and the RI value of PDSCH while being 1, determine that the subband PMI information of E-PDCCH is for transmitting broadband P MI information or the subband PMI information in the channel condition information fed back for PDSCH;

When the RI value of determining E-PDCCH is 1 and the RI value of PDSCH while being greater than 1, the subband PMI information of determining E-PDCCH is broadband P MI information or subband PMI information in the channel condition information for PDSCH transmission feedback, and the row in pre-coding matrix corresponding to definite pre-coding matrix PMI that is this E-PDCCH.

When the RI value of determining E-PDCCH is greater than 1 and the RI value of PDSCH while equaling the RI value of E-PDCCH, the subband PMI information of determining E-PDCCH is to transmit broadband P MI information or the subband PMI information in the channel condition information fed back for PDSCH;

When the RI value of determining E-PDCCH is greater than 1 and the RI value of PDSCH while being greater than the RI value of E-PDCCH, the subband PMI information of determining E-PDCCH is broadband P MI information or subband PMI information in the channel condition information for PDSCH transmission feedback, and the row of the P in pre-coding matrix corresponding to the PMI that definite pre-coding matrix is this E-PDCCH, P >=1.

Accordingly, the embodiment of the present invention provides a kind of channel state information periodic feedback device, and this device can be specially the UE that carries out information feedback, and as shown in Figure 6, this device comprises:

Determining unit 601, for according to information feedback mode decision channel condition information, channel condition information comprises for the channel condition information of PDSCH transmission feedback and for the channel condition information of other transmission feedback;

Feedback unit 602, for to the base station feedback channel condition information.

Concrete feedback model, also repeats no more at this with described consistent above with the Report Type increased in channel condition information.

The embodiment of the present invention also provides a kind of channel state information periodic feedback device, and this device can be specially the UE that carries out information feedback, and as shown in Figure 7, this device comprises:

RI value determining unit 701, for the RI value of determining Physical Downlink Shared Channel PDSCH and the RI value that strengthens Physical Downlink Control Channel E-PDCCH;

Channel condition information determining unit 702, for according to the feedback model of channel condition information, determining channel condition information, and, when the RI of Physical Downlink Shared Channel PDSCH value and the RI value that strengthens Physical Downlink Control Channel E-PDCCH are unequal, channel condition information comprises the channel condition information for E-PDCCH transmission feedback;

Information feedback unit 703, for to the base station feedback channel condition information.

The embodiment of the present invention is also corresponding provides a kind of channel state information periodic feedback device, and this device can be specially base station, as shown in Figure 8, comprising:

Receiving element 801, for the channel condition information of receiving terminal feedback, channel condition information comprises: for the channel condition information of PDSCH transmission feedback and the channel condition information fed back for other transmission;

Scheduling unit 802, for being dispatched terminal according to channel condition information.

Wherein, the channel condition information for other transmission feedback can be specially: for the channel condition information of E-PDCCH transmission feedback.

When the described channel condition information for PDSCH transmission feedback comprises PMI information, and while in the channel condition information for E-PDCCH transmission feedback, not comprising the PMI information of E-PDCCH, scheduling unit 802 is before being dispatched terminal according to channel condition information, also for:

Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.

Claims

1. a channel state information periodic feedback method, is characterized in that, comprising:

To the described channel condition information of base station feedback.

2. the method for claim 1, is characterized in that, the described channel condition information for strengthening Physical Downlink Control Channel E-PDCCH transmission feedback is specially:

The RI value of the E-PDCCH fed back for described E-PDCCH transmission is less than or equal to the channel condition information of 2 o'clock.

3. method as claimed in claim 2, is characterized in that, when the RI of described E-PDCCH value is greater than 1, in the described channel condition information for strengthening Physical Downlink Control Channel E-PDCCH transmission feedback, also comprises: the RI value of E-PDCCH.

4. method as claimed in claim 3, is characterized in that, the described channel condition information for strengthening Physical Downlink Control Channel E-PDCCH transmission feedback comprises:

Comprise the Report Type for the subband CQI information of E-PDCCH transmission feedback; Perhaps

Comprise the Report Type for subband CQI information and the subband PMI information that transmission is fed back for E-PDCCH of E-PDCCH transmission feedback.

5. method as claimed in claim 4, is characterized in that, in the described channel condition information for strengthening Physical Downlink Control Channel E-PDCCH transmission feedback, also comprises:

Comprise K the subband CQI information for E-PDCCH transmission feedback and a Report Type for the PMI information of continuous K subband of E-PDCCH transmission feedback, described K > 1.

6. method as described as claim 4 or 5, is characterized in that, in the described channel condition information for strengthening Physical Downlink Control Channel E-PDCCH transmission feedback, also comprises:

Comprise the Report Type for the broadband CQI information of E-PDCCH transmission feedback; Perhaps

Comprise the Report Type for broadband CQI information and the broadband pre-coding matrix indication PMI information that transmission is fed back for E-PDCCH of E-PDCCH transmission feedback.

7. method as claimed in claim 4, it is characterized in that, transmit in the Report Type of the subband CQI information of feeding back and the subband PMI information of transmitting feedback for E-PDCCH described comprising the Report Type of the subband CQI information that transmission is fed back for E-PDCCH and described comprising for E-PDCCH, also comprise:

Be used to indicate the subband positional information of subband position.

8. method as claimed in claim 6, it is characterized in that, when the described channel condition information for PDSCH transmission feedback comprises PMI information, and described the transmission for E-PDCCH in the channel condition information fed back while not comprising PMI information, described definite channel condition information also comprises:

When the RI value of determining described E-PDCCH is 1 and the RI value of described PDSCH while being 1, the broadband P MI information of determining E-PDCCH is the broadband P MI information in the channel condition information for PDSCH transmission feedback, and the broadband P MI information based on this E-PDCCH is determined the described broadband CQI information for E-PDCCH transmission feedback;

When the RI value of determining described E-PDCCH is 1 and the RI value of described PDSCH while being greater than 1, the broadband P MI information of determining E-PDCCH is the broadband P MI information in the channel condition information for PDSCH transmission feedback, and the row in pre-coding matrix corresponding to the PMI that definite pre-coding matrix is this E-PDCCH, and the broadband P MI information based on this E-PDCCH is determined the described broadband CQI information for E-PDCCH transmission feedback;

When the RI value of determining described E-PDCCH is greater than 1 and the RI value of described PDSCH while equaling the RI value of described E-PDCCH, the broadband P MI information of determining E-PDCCH is the broadband P MI information in the channel condition information for PDSCH transmission feedback, and the broadband P MI information based on this E-PDCCH is determined the described broadband CQI information for E-PDCCH transmission feedback;

When the RI value of determining described E-PDCCH is greater than 1 and the RI value of described PDSCH while being greater than the RI value of described E-PDCCH, the broadband P MI information of determining E-PDCCH is the broadband P MI information in the channel condition information for PDSCH transmission feedback, and the row of the P in pre-coding matrix corresponding to the PMI that definite pre-coding matrix is this E-PDCCH, and the broadband P MI information based on this E-PDCCH is determined the described broadband CQI information for E-PDCCH transmission feedback, described P >=1;

When the RI value of determining described E-PDCCH is 1 and the RI value of PDSCH while being 1, the subband PMI information of determining E-PDCCH is broadband P MI information or subband PMI information in the channel condition information for PDSCH transmission feedback, and the subband PMI information based on this E-PDCCH is determined the described subband CQI information for E-PDCCH transmission feedback;

When the RI value of determining described E-PDCCH is 1 and the RI value of PDSCH while being greater than 1, the subband PMI information of determining E-PDCCH is broadband P MI information or subband PMI information in the channel condition information for PDSCH transmission feedback, and the row in pre-coding matrix corresponding to the PMI that definite pre-coding matrix is this E-PDCCH, and the subband PMI information based on this E-PDCCH is determined the described subband CQI information for E-PDCCH transmission feedback;

When the RI value of determining described E-PDCCH is greater than 1 and the RI value of described PDSCH while equaling the RI value of described E-PDCCH, the subband PMI information of determining E-PDCCH is broadband P MI information or subband PMI information in the channel condition information for PDSCH transmission feedback, and the subband PMI information based on this E-PDCCH is determined the described subband CQI information for E-PDCCH transmission feedback;

When the RI value of determining described E-PDCCH is greater than 1 and the RI value of described PDSCH while being greater than the RI value of described E-PDCCH, the subband PMI information of determining E-PDCCH is broadband P MI information or subband PMI information in the channel condition information for PDSCH transmission feedback, and the row of the P in pre-coding matrix corresponding to the PMI that definite pre-coding matrix is this E-PDCCH, and the subband PMI information based on this E-PDCCH is determined the described subband CQI information for E-PDCCH transmission feedback, described P >=1.

9. method as claimed in claim 8, is characterized in that, the row in pre-coding matrix corresponding to the PMI that described definite pre-coding matrix is this E-PDCCH are specially:

Determine row of CQI maximum corresponding in the pre-coding matrix that PMI that pre-coding matrix is this E-PDCCH is corresponding;

P row in pre-coding matrix corresponding to the PMI that described definite pre-coding matrix is this E-PDCCH are specially:

Determine the P row of CQI maximum corresponding in the pre-coding matrix that PMI that pre-coding matrix is this E-PDCCH is corresponding.

10. a channel state information periodic feedback method, is characterized in that, comprising:

To the described channel condition information of base station feedback.

11. method as claimed in claim 10, it is characterized in that, when the RI of Physical Downlink Shared Channel PDSCH value equates with the RI value that strengthens Physical Downlink Control Channel E-PDCCH, only comprise the channel condition information that transmission is fed back for Physical Downlink Shared Channel PDSCH in described channel condition information or only comprise the channel condition information for E-PDCCH transmission feedback.

12. a channel state information periodic feedback method, is characterized in that, comprising:

13. method as claimed in claim 12, it is characterized in that, when the described channel condition information for PDSCH transmission feedback comprises PMI information, and while in the described channel condition information for E-PDCCH transmission feedback, not comprising the PMI information of E-PDCCH, described according to described channel condition information, described terminal is dispatched before, also comprise:

When described channel condition information comprises the broadband CQI information for E-PDCCH transmission feedback:

When the RI value of determining described E-PDCCH is 1 and the RI value of PDSCH while being 1, determine that the broadband P MI information of E-PDCCH is for transmitting the broadband P MI information in the channel condition information fed back for PDSCH;

When the RI value of determining described E-PDCCH is 1 and the RI value of PDSCH while being greater than 1, the broadband P MI information of determining E-PDCCH is the broadband P MI information in the channel condition information for PDSCH transmission feedback, and the row in pre-coding matrix corresponding to definite pre-coding matrix broadband P MI that is this E-PDCCH;

When the RI value of determining described E-PDCCH is greater than 1 and the RI value of PDSCH while equaling the RI value of described E-PDCCH, the broadband P MI information of determining E-PDCCH is to transmit the broadband P MI information in the channel condition information fed back for PDSCH;

When the RI value of determining described E-PDCCH is greater than 1 and the RI value of PDSCH while being greater than the RI value of described E-PDCCH, the broadband P MI information of determining E-PDCCH is the broadband P MI information in the channel condition information for PDSCH transmission feedback, and the row of the P in pre-coding matrix corresponding to the broadband P MI that definite pre-coding matrix is this E-PDCCH, described P >=1;

When the RI value of determining described E-PDCCH is 1 and the RI value of PDSCH while being 1, determine that the subband PMI information of E-PDCCH is for transmitting broadband P MI information or the subband PMI information in the channel condition information fed back for PDSCH;

When the RI value of determining described E-PDCCH is 1 and the RI value of PDSCH while being greater than 1, the subband PMI information of determining E-PDCCH is broadband P MI information or subband PMI information in the channel condition information for PDSCH transmission feedback, and the row in pre-coding matrix corresponding to definite pre-coding matrix PMI that is this E-PDCCH;

When the RI value of determining described E-PDCCH is greater than 1 and the RI value of described PDSCH while equaling the RI value of described E-PDCCH, the subband PMI information of determining E-PDCCH is to transmit broadband P MI information or the subband PMI information in the channel condition information fed back for PDSCH;

When the RI value of determining described E-PDCCH is greater than 1 and the RI value of described PDSCH while being greater than the RI value of described E-PDCCH, the subband PMI information of determining E-PDCCH is broadband P MI information or subband PMI information in the channel condition information for PDSCH transmission feedback, and the row of the P in pre-coding matrix corresponding to the PMI that definite pre-coding matrix is this E-PDCCH, described P >=1.

14. a channel state information periodic feedback device, is characterized in that, comprising:

15. device as claimed in claim 14, it is characterized in that, when the described channel condition information for PDSCH transmission feedback comprises PMI information, and while in the described channel condition information for E-PDCCH transmission feedback, not comprising PMI information, described determining unit also for:

16. a channel state information periodic feedback device, is characterized in that, comprising:

RI value determining unit, for the RI value of determining Physical Downlink Shared Channel PDSCH and the RI value that strengthens Physical Downlink Control Channel E-PDCCH;

The channel condition information determining unit, be used for according to information feedback mode decision channel condition information, and, when the RI of Physical Downlink Shared Channel PDSCH value and the RI value that strengthens Physical Downlink Control Channel E-PDCCH are unequal, described channel condition information comprises the channel condition information for E-PDCCH transmission feedback;

The information feedback unit, for to the described channel condition information of base station feedback.

17. a channel state information periodic feedback device, is characterized in that, comprising:

18. device as claimed in claim 17, it is characterized in that, when the described channel condition information for PDSCH transmission feedback comprises PMI information, and while in the described channel condition information for E-PDCCH transmission feedback, not comprising the PMI information of E-PDCCH, described scheduling unit described according to described channel condition information, described terminal is dispatched before, also for:

When the RI value of determining described E-PDCCH is 1 and the RI value of PDCCH while being 1, determine that the broadband P MI information of E-PDCCH is for transmitting the broadband P MI information in the channel condition information fed back for PDSCH;

When the RI value of determining described E-PDCCH is 1 and the RI value of PDCCH while being greater than 1, the broadband P MI information of determining E-PDCCH is the broadband P MI information in the channel condition information for PDSCH transmission feedback, and the row in pre-coding matrix corresponding to definite pre-coding matrix broadband P MI that is this E-PDCCH;

When the RI value of determining described E-PDCCH is greater than 1 and the RI value of PDCCH while being greater than the RI value of described E-PDCCH, the broadband P MI information of determining E-PDCCH is the broadband P MI information in the channel condition information for PDSCH transmission feedback, and the row of the P in pre-coding matrix corresponding to the broadband P MI that definite pre-coding matrix is this E-PDCCH, described P >=1;

When the RI value of determining described E-PDCCH is 1 and the RI value of PDCCH while being 1, determine that the subband PMI information of E-PDCCH is for transmitting broadband P MI information or the subband PMI information in the channel condition information fed back for PDSCH;

When the RI value of determining described E-PDCCH is 1 and the RI value of PDCCH while being greater than 1, the subband PMI information of determining E-PDCCH is broadband P MI information or subband PMI information in the channel condition information for PDSCH transmission feedback, and the row in pre-coding matrix corresponding to definite pre-coding matrix PMI that is this E-PDCCH;