CN102237957B - Method, system and device for reporting channel state information - Google Patents

Abstract

The invention discloses a method, a system and a device for reporting channel state information, which are used for solving the problems that the accuracy of RI information reporting is reduced and the flexibility of the system is lost due to a PMI-1 information reporting mode in the prior art. The method realizes the independent report of the PMI-1 information by independently configuring the report period information and the report timing sequence offset information of the PMI-1 information. In the implementation mode provided by the embodiment of the invention, the PMI-1 information does not need to be multiplexed with other reported parameter information, so that the accuracy of reporting the other parameter information is improved, and the reporting period of the PMI-1 information can be independently configured, so that the system obtains greater flexibility.

Description

A method, system and device for reporting channel state information

technical field

The present invention relates to the field of communication technologies, in particular to a method, system and device for reporting channel state information. the

Background technique

In a point-to-point communication system, the transmitter can optimize the modulation mode, coding rate and spatial distribution characteristics of the signal power according to the acquired channel state information (CSI), so that the transmitted signal can match the channel propagation characteristics. , and can enhance the reliability of signal reception and reduce the requirement for the complexity of the reception algorithm. At the same time, in a multi-user system, the transmitter can also make a scheduling decision according to the obtained CSI, so as to improve the system spectrum efficiency and avoid inter-cell interference. the

In the Long-Term Evolution (LTE) system R8/9, the evolved base station (evolvedNodeB, eNB) can use channel reciprocity or obtain the CSI of the downlink channel based on the feedback of the user equipment (User Equipment, UE). The feedback methods for several main transmission modes of the physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) all adopt the codebook-based implicit CSI feedback method. In the precoding matrix indicator (Precoding Matrix Indicator, PMI) reporting mode of transmission mode 4, 5, 6 and transmission mode 8, the UE measures the downlink channel based on the cell-specific reference signal (CRS), and according to its own The receiving processing algorithm reports CSI to the eNB, where the reported CSI includes the number of data streams (RankIndication, RI), PMI, and channel quality information (Channel Quality Indication, CQI) of each codeword. The CQI reported by the UE to the eNB is calculated and determined assuming that the eNB uses its recommended RI and PMI. the

The precoding scheme in the above-mentioned LTE system R8/9 is applied to a single-user application scenario, while the precoding scheme in the next-generation mobile cellular communication (Long Term Evolution-Advanced, LTE-Advanced) system supports multi-user scenarios, and the LTE-Advanced The Advanced system requires that the accuracy of CSI feedback be improved as much as possible while maintaining low feedback overhead, so a feedback scheme based on dual codebooks is adopted in the LTE-Advanced system. the

In the feedback scheme based on dual codebooks, CSI can be divided into relatively stable long-term/bandwidth CSI and short-term/frequency selective CSI with relatively high time/frequency characteristics. The UE may use two codebooks to quantize the above CSI respectively according to different feedback cycles, and feed back the corresponding PMI. Among them, PMI-1 is used to reflect long-term/broadband CSI, has higher spatial resolution, and can be fed back with a larger period and a larger bandwidth. The PMI-2 is used to reflect the fast-changing part of the CSI, and the sub-band is used as a unit and a relatively low feedback cycle is used for feedback. the

In the LTE system, higher layers can configure the UE to use the Physical Uplink Control Channel (Physical Uplink Control Channel, PUCCH) for periodic reporting and/or use the Physical Uplink Shared Channel (Physical Uplink Shared Channel, PUSCH) for aperiodic reporting. Among them, the reporting information reported by the UE using the PUCCH is a reporttype combination selected from four report types, and each combination corresponds to a PUCCH reporting mode (reporting mode), and each PUCCH reporting mode is also determined by the upper layer. Signaling is configured semi-statically. Table 1 shows the relationship between report type and reporting mode in the LTE system. the

Table 1

Since the existing UE reporting mechanism is designed based on a single codebook structure, it is no longer applicable to the dual codebook feedback scheme of the LTE-Advanced system. In order to feed back the PMI-1 information in the dual codebook feedback scheme, in the prior art, a manner of multiplexing the PMI-1 information and the RI information for reporting can be adopted. However, this reporting method will increase the equivalent coding rate of RI information, thereby reducing the accuracy of RI information reporting, and the above method of multiplexing PMI-1 information and RI information cannot be used for PMI-1 information and RI information. Configure an independent reporting period, thus losing the flexibility of the system.

Contents of the invention

In view of this, embodiments of the present invention provide a method, system and device for reporting channel state information, which are used to improve the accuracy of RI information reporting in the PMI-1 information reporting manner and improve system flexibility. the

A method for reporting channel state information provided by an embodiment of the present invention includes:

The user equipment UE receives the configuration information sent by the radio resource control RRC, wherein the configuration information includes the reporting period information of the long-term/bandwidth precoding matrix identifier PMI-1 information and the reporting timing offset information, and the reporting period is independent The reporting period for reporting the PMI-1 information;

The UE determines the time to report the PMI-1 information according to the reporting period information and the reporting timing offset information;

The UE judges whether to report the PMI-1 information according to the RI information reported by itself; if the RI information is greater than the set RI threshold, the UE reports the channel quality information CQI information at the determined time The evolved base station eNB; otherwise, the UE reports the PMI-1 information to the eNB at the determined time. the

A system for reporting channel state information provided by an embodiment of the present invention includes:

The radio resource control RRC is used to send configuration information to the user equipment UE, where the configuration information includes reporting period information and reporting timing offset information of long-term/bandwidth precoding matrix identifier PMI-1 information, and the reporting period is The reporting period for independently reporting the PMI-1 information;

The UE is configured to receive the configuration information sent by the RRC, and determine the time to report the PMI-1 information according to the reporting period information and the reporting timing offset information included in the configuration information, and determine the time to report the PMI-1 information according to the number of data streams reported by itself When the identification RI information determines that the RI information is greater than the set RI threshold, report the channel quality information CQI information to the evolved base station eNB at the determined time; otherwise, report the PMI-1 information to the eNB at the determined time;

The eNB is configured to receive the PMI-1 information reported by the UE. the

A device for reporting channel state information provided by an embodiment of the present invention includes:

The receiving module is configured to receive the configuration information sent by the radio resource control RRC, wherein the configuration information includes the reporting period information of the long-term/bandwidth precoding matrix identifier PMI-1 information and the reporting timing offset information, and the reporting period The reporting cycle for independently reporting the PMI-1 information;

A determination module, configured to determine the time to report the PMI-1 information according to the reporting period information and the reporting timing offset information;

Judgment reporting module, used to identify RI information according to the number of data streams reported by itself to determine whether to report PMI-1 information;

A sending module, configured to report channel quality information CQI information to the evolved base station eNB at the determined moment when it is determined that the RI information is greater than a set RI threshold; when it is determined that the RI information is less than or equal to a set RI threshold , reporting the PMI-1 information to the eNB at the determined moment. the

Embodiments of the present invention provide a method, system, and device for reporting channel state information. In the method, independent configuration of the reporting cycle information and reporting timing offset information of the PMI-1 information is implemented to independently configure the PMI-1 information. report. In the implementation provided by the embodiment of the present invention, the PMI-1 information does not need to be multiplexed with other reported parameter information, thus improving the accuracy of reporting the other parameter information, and because the reporting period of the PMI-1 information can be independently configured, Therefore, the system obtains greater flexibility. the

Description of drawings

Fig. 1 is the method for reporting channel state information provided by the embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a system reporting channel state information provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an apparatus for reporting channel state information provided by an embodiment of the present invention. the

Detailed ways

In order to improve the accuracy of RI information reporting and improve system flexibility, the embodiment of the present invention provides a method for reporting channel state information, in which a new reporting type report type5 is added, and PMI is reported in this reporting type -1 information, in which the reporting period information and reporting timing offset information of this reporting type are semi-statically controlled by high-level radio resource control (Radio Resource Control, RRC), and the reporting period of the PMI-1 information is the independent reporting of PMI-1 The reporting cycle of the information makes the PMI-1 information need not be multiplexed with other parameter information when reporting, for example, it does not need to be multiplexed with RI information, thereby improving the accuracy of RI information reporting and enabling the system to obtain greater flexibility. the

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. the

Fig. 1 is the reporting method of the channel state information that the embodiment of the present invention provides, and this method comprises the following steps:

S101: The UE receives configuration information sent by RRC, wherein the configuration information includes reporting period information of PMI-1 information and reporting timing offset information, and the reporting period is a reporting period for independently reporting the PMI-1 information. the

In the embodiment of the present invention, the reporting period for the UE to report the PMI-1 information is configured independently, and does not need to be multiplexed with other reported parameter information. In addition, the reporting period information and reporting timing offset information of the UE reporting PMI-1 information are semi-static configurations performed by RRC, and the reporting period information and reporting timing offset information are carried in the configuration information and sent to the UE. the

S102: The UE determines a time to report the PMI-1 information according to the reporting period information and the reporting timing offset information. the

When the UE receives the configuration information sent by RRC, since the configuration information includes the independently configured reporting cycle information and reporting timing offset information of the PMI-1 information, the UE can determine to report the PMI-1 information according to the configuration information moment. the

S103: The UE reports the PMI-1 information to the eNB at the determined time. the

In the method for reporting channel state information provided in the embodiment of the present invention, a new report type report type5 is added to the existing report types, and the added new report type report type5 is used to report PMI-1 information. The reporting period information and reporting timing offset information of report type5 are semi-statically controlled by high-level signaling, and the reporting period and reporting timing offset information of report type5 are configured independently of the existing report type. the

After the reporting mode configured by the high-level signaling is sent to the UE, the information reported by the UE using the PUCCH according to each reporting mode can be a combination of several report types. Therefore, in the embodiment of the present invention, in order to support the PUCCH reporting mode that includes report type 5, When the reporting mode includes the report type5 information corresponding to the PMI-1 information, the reporting mode may also include at least one other reporting type of information. For example, the report mode can include: report type2: wideband (Wideband) CQI/PMI, report type3: RI and Report type5: long-term wideband report (Long-term wideband report) and other report types, or the report mode can also include: report type 1 : sub-band (sub-band) CQI, report type2: Wideband CQI/PMI, report type3: RI and report type5: Long-term wideband report. The above are just two examples of report type 5 included in the reporting mode. Other reporting modes including report type 5 and at least one other reporting type information can also be used, so I won’t go into details here. the

In the embodiment of the present invention, report type2 is used to report short-term PMI information, that is, report PMI-2 information. Since a reporting mode includes at least two reporting types, and the reporting period information of the reporting parameters corresponding to each reporting type and the reported timing offset information are different, but there may also be one or several The reporting time of the reporting parameter information corresponding to the reporting type is the same. In order to reduce signaling overhead in the embodiment of the present invention, priority information of each reporting type may be set, where the priority information may be set by RRC, or may be set by UE itself. the

When the reporting time of the reporting parameter information corresponding to two reporting modes is the same in the reporting mode, the UE may report the reporting parameter information corresponding to the reporting type with the highest priority to the eNB according to the priority information of the reporting type information. Therefore, it can be seen that when the reporting time of the reporting parameter information corresponding to other reporting type information is the same as the reporting time of the PMI-1 information corresponding to report type5, the UE, according to the priority information of the reporting type information, when report type5 has the highest priority, Then report the PMI-1 information to the eNB. When the UE reports the report parameter information corresponding to the report type with the highest priority at the reporting moment, the UE discards the parameter information corresponding to the report types with other priorities. the

For example, when the reporting mode includes report type1, report type2, report type3, and reporttype5, the corresponding reporting parameter information is sub-band CQI information, wideband CQI/PMI information, RI information, and PMI-1 information, and the priority of the reporting type is The order of levels from high to low is reporttype3, report type5, report type2, and report type1. When the reporting time of the reporting parameter information corresponding to the above reporting types is the same, the UE only reports the RI information corresponding to report type 3 with the highest priority, and discards other reporting parameter information. the

In the embodiment of the present invention, report type5 includes PMI-1 information, and may also include channel quality information related to PMI-1 information, that is, at the time of reporting PMI information, the UE will also report the channel related to the PMI-1 information Quality information, for example, the channel quality information may be CQI information and the like. When reporttype5 includes CQI information, the CQI information may be channel quality information calculated assuming that the eNB adopts information such as RI/PMI-1/PMI-2 recommended by the UE. the

Since feedback enhancement is mainly used in Multi-User Multiple-Input Multiple-Output (MU-MIMO) scenarios, the codebook structures that may exist in MU-MIMO scenarios include: when the RI information is not greater than the set When the RI threshold RI _T is set, the dimension of PMI-1 is N _T ×RI _T , and the dimension of PMI-2 is RI _T ×RI, where N _T is the number of transmit antennas of the eNB; when RI is greater than the set RI threshold When RI _T is used, the dimension of PMI-1 is fixed N _T ×N _T , and the dimension of PMI-2 is N _T ×RI.

Based on the above codebook structure, the UE can determine whether to report the PMI-1 information according to the RI information reported by itself. Because when the RI is greater than the set RI threshold RI _T , the dimension of PMI-1 is fixed, which is related to the number of transmit antennas of the eNB. Therefore, in this case, in order to save signaling overhead, the UE can use the PMI-1 information At the reporting time of , the PMI-1 information is not reported, but only the CQI information is reported.

Or in the embodiment of the present invention, the UE can also always report the PMI-1 information regardless of the value of the RI. During the reporting process, the UE can calculate the PMI-1 information according to a fixed RI value. The fixed RI value is A value smaller than the set RI threshold RI _T. Since the UE always reports the PMI-1 information regardless of the value of the RI, the eNB can always obtain the corresponding PMI-1 information, which facilitates the dynamic switching of the MU-MIMO mode or single-user MIMO (SU-MIMO) mode , and facilitate Adaptive Modulation and Coding (AMC).

Also in the above codebook structure, the CQI information contained in the report type5 can also be specifically calculated according to different values of RI. When the RI is not greater than the set RI threshold RI _T , the CQI information contained in report type5 is CQI (RI, PMI-1, PMI-2), that is, the UE assumes that the eNB uses the RI/PMI-1/PMI- 2 The CQI calculated by information, when RI is greater than the set RI threshold RI _T , the CQI information contained in report type5 is CQI (RI _X , PMI-1, PMI-2 _X ), where RI _X is less than the RI threshold RI The value of _T , PMI-2 _X is the precoding matrix whose dimension is RI _T × RI selected from the codebook 2, and the reported CQI information is that the UE assumes that the eNB uses the RI _X /PMI-1/PMI- 2 _X information calculated CQI. Since each codeword corresponds to a CQI value, in order to save signaling overhead in the embodiment of the present invention, the CQI values of two codewords may be reported in a manner of differential encoding. In the embodiment of the present invention, when the report mode includes report type1 or report type2, also in order to save signaling overhead, the CQI values of the two codewords may be reported in a manner of differential encoding.

Table 2 is the reporting type included in the introduced PUCCH reporting mode and the bit number information corresponding to the reporting type when feedback enhancement is performed based on 8 antennas provided by the embodiment of the present invention, and in the information reported by report type5 in Table 2 Contains only PMI-1 information. the

Table 2

In the above table 2, 8 antennas are taken as an example for illustration, where the information reported by report type1 is Sub-band CQI information, the information reported by report type2 is short-term PMI/CQI information, that is, PMI-2 information and CQI information, and report type3 reports The information reported by report type4 is RI information, the information reported by report type4 is Wideband CQI information, and the information reported by report type5 is long-term/broadband report information. In Table 2, the reported information is PMI-1 information.

The number of reporting bits of the Sub-band CQI information reported by report type1 is the same as that in the prior art when there are 2 antennas and 4 antennas. When there are 8 antennas, in mode 1-2, the Sub-band CQI information does not need to be reported. In mode 2-2, when the value of RI is 1, the reported number of bits is the number of divided subbands, and the reported information also includes CQI-1 (RI, W1, W2), that is, it is assumed that the eNB adopts The CQ1 information calculated after the RI/PMI-1/PMI-2 information recommended by the UE. When the value of RI is greater than 1, the number of reported bits is the number of divided subbands, and the reported information also includes CQI-1 (RI, W1, W2) and ΔCQI-2(RI, W1, W2), where ΔCQI-2(RI, W1, W2) assumes that the eNB adopts the RI>1/PMI-1/PMI-2 information recommended by the UE Then calculate the difference between the obtained CQ1 information and CQI-1 (RI, W1, W2). the

The information reported by report type2 is short-term PMI/CQI information, and the number of bits of the reported parameter information under 2 antennas and 4 antennas is the same as that of the corresponding reported parameters in the prior art. In the case where the 8-antenna RI is equal to 1, in modes 1-2 and 2-2, the information reported by report type2 is PMI-2 information and CQI-1(RI, W1, W2), where CQI-1(RI , W1, W2) are the CQ1 information calculated after assuming that the eNB adopts the RI/PMI-1/PMI-2 information recommended by the UE. When the 8-antenna RI is greater than 1 and less than the set RI threshold RI _T , in mode 1-2 and mode 2-2, the information reported by report type2 is PMI-2 information, CQI-1 (RI, W1, W2) and ΔCQI-2(RI, W1, W2), where ΔCQI-2(RI, W1, W2) is the CQ1 information calculated after assuming that the eNB adopts the RI>1/PMI-1/PMI-2 information recommended by the UE, Difference with CQI-1 (RI, W1, W2) information. When the 8-antenna RI is greater than the set RI threshold RI _T , the information reported by report type2 is PMI-2 information, CQI-1 (RI, 1, W2) and ΔCQI-2 (RI, 1, W2), where CQI -1(RI, 1, W2) is the CQI information calculated by assuming that the eNB adopts the RI/PMI-1=1/PMI-2 information recommended by the UE, and ΔCQI-2(RI, 1, W2) is the assumption that the eNB adopts The difference between the CQ1 information calculated after knowing the RI>RI _T /PMI-1=1/PMI-2 information recommended by the UE and the CQI-1 (RI, 1, W2) information.

The information reported by report type3 is RI information, and the number of bits of the RI information reported under 2 antennas and 4 antennas is the same as that of the RI information reported in the prior art. In the case of 8 antennas, in modes 1-2 and 2-2, the reported RI information is 3 bits. the

The information reported by report type4 is CQI information. Since modes 1-2 and 2-2 do not include reporttype4, report type4 does not need to report CQI information. the

The information reported by report type5 is PMI-1 information. When the 8-antenna RI is not greater than the set RI threshold RI _T , in mode 1-2 and mode 2-2, the reported information is PMI-1 information. When the 8-antenna RI is greater than the set RI threshold, in Mode 1-2 and Mode 2-2, PMI-1 information may not be reported, or PMI-1(RI _X ) information may be reported, where PMI-1(RI _X ) is the PMI-1 information determined by assuming that RI is RI _X smaller than the set RI threshold.

Table 3 is the reporting type included in the introduced PUCCH reporting mode and the bit number information corresponding to the reporting type when feedback enhancement is performed based on 8 antennas provided by the embodiment of the present invention, and in the information reported by report type5 in Table 3 Contains PMI-1 information and CQI information. the

table 3

In the above Table 3, the reporting information of report type1, report type2, report type3, and report type4 and the number of bits of the reporting information are the same as those in Table 2. The reported information of report type5 includes PMI-1 information and CQI information. When the 8-antenna RI is equal to 1, in mode 1-2 and mode 2-2, the reported information includes PMI-1 information and CQI (RI, W1, W2) information, where CQI (RI, W1, W2) is It is assumed that the eNB adopts the CQI information calculated after the RI1/PMI-1/PMI-2 information recommended by the UE. When the 8-antenna RI is greater than 1 but not greater than the set RI threshold RI _T , in mode 1-2 and mode 2-2, the reported information includes: PMI-1, CQI (RI, W1, W2) and ΔCQI- 2(RI, W1, W2), where ΔCQI-2(RI, W1, W2) is the CQ1 information calculated by assuming that the eNB adopts the RI>1/PMI-1/PMI-2 information recommended by the UE, and the CQI The difference of (RI, W1, W2) information. When the 8-antenna RI is greater than the set RI threshold RI _T , in mode 1-2 and mode 2-2, the reported information includes: PMI-1, CQI(RI _X , W1, W2) and ΔCQI-2( RI, W1, W2), where CQI (RI _X , W1, W2) assumes that the eNB adopts the RI recommended by the UE to be RI _X less than the set RI threshold, and according to RI _X /PMI-1/PMI-2 information The CQ1 information obtained after calculation, ΔCQI-2(RI, W1, W2) is the CQ1 information calculated after assuming that the eNB adopts the RI>RI _T /PMI-1/PMI-2 information recommended by the UE, and CQI(RI _X , W1, W2) information difference.

In the embodiment of the present invention, a new reporting type is added to the existing reporting types, which is used to report PMI-1 information, and high-level signaling can report the reporting cycle information of the parameters and The reporting timing offset information is configured semi-statically. At the same time, the reporting cycle information, reporting timing offset information and existing reporting types are also configured independently, so there is no need to multiplex with the existing reporting mode, which increases the accuracy of reporting. , and improve the flexibility of the system. the

Figure 2 is a schematic structural diagram of a reporting system for channel state information provided by an embodiment of the present invention, the device includes:

The radio resource control RRC21 is configured to send configuration information to the user equipment UE, wherein the configuration information includes reporting period information and reporting timing offset information of long-term/bandwidth precoding matrix identifier PMI-1 information, and the reporting period is The reporting period for independently reporting the PMI-1 information;

UE22 is configured to receive the configuration information sent by RRC, and determine the time to report the PMI-1 information according to the reporting cycle information and reporting timing offset information contained in the configuration information, and send the PMI-1 information at the determined time -1 information is reported to the evolved base station eNB;

eNB23 is configured to receive the PMI-1 information reported by the UE. the

Figure 3 is a schematic structural diagram of a device for reporting channel state information provided by an embodiment of the present invention, the device includes:

The receiving module 31 is configured to receive configuration information sent by radio resource control RRC, wherein the configuration information includes reporting period information and reporting timing offset information of long-term/bandwidth precoding matrix identifier PMI-1 information, and the reporting The period is the reporting period for independently reporting the PMI-1 information;

Determining module 32, for determining the time to report the PMI-1 information according to the reporting cycle information and reporting timing offset information;

The sending module 33 is configured to report the PMI-1 information to the evolved base station eNB at the determined time. the

In said device,

The sending module 33 is further configured to report channel quality information CQI to the eNB at the determined moment. the

In said device,

The sending module 33 is further configured to report the PMI-1 information at the reporting time when the reporting time of the reporting type corresponding to the PMI-1 information in the reporting mode arrives according to the reporting mode information sent by RRC eNB, wherein the reporting mode includes at least one other reporting type information and reporting type information corresponding to the PMI-1 information. the

In said device,

The sending module 33 is further configured to: when in the reporting mode, the reporting time of the reporting parameter information corresponding to other reporting type information is the same as the reporting time of the PMI-1 information, the UE reports the type information according to When the priority information of the reporting type corresponding to the PMI-1 information has the highest priority, report the PMI-1 information to the eNB. the

The device also includes:

Judging and reporting module 34, for judging whether to report PMI-1 information according to the number of data streams reported by itself to identify RI information, when the RI information is greater than the set RI threshold, report CQI information, and stop reporting the PMI -1 info. the

Embodiments of the present invention provide a method, system, and device for reporting channel state information. In the method, independent configuration of the reporting cycle information and reporting timing offset information of the PMI-1 information is implemented to independently configure the PMI-1 information. report. In the implementation provided by the embodiment of the present invention, the PMI-1 information does not need to be multiplexed with other reported parameter information, thus improving the accuracy of reporting the other parameter information, and because the reporting period of the PMI-1 information can be independently configured, Therefore, the system obtains greater flexibility. the

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations. the

Claims (8)

1. the report method of a channel condition information is characterized in that, comprising:

User equipment (UE) receives the configuration information that radio resource control RRC sends, comprise the report cycle information of long-term/bandwidth pre-coding matrix sign PMI-1 information in the wherein said configuration information and report timing off-set amount information, and described report cycle is for independently reporting the report cycle of described PMI-1 information;

Described UE is according to described report cycle information and report timing off-set amount information, determines to report the moment of described PMI-1 information;

The number of data streams sign RI information that described UE reports according to self judges whether to carry out reporting of PMI-1 information; If described RI information is greater than the RI threshold value of setting, then UE reports evolution base station eNB in the described moment of determining with channel quality information CQI information; Otherwise described UE reports eNB in the described moment of determining with PMI-1 information.

2. the method for claim 1 is characterized in that, described UE reports eNB to comprise PMI-1 information in the described moment of determining:

UE is according to the pattern information that reports of RRC transmission, when reporting of the described reporting types that reports the information of PMI-1 described in pattern correspondence arrived constantly, constantly PMI-1 information is reported eNB, the wherein said reporting types information that reports pattern to comprise at least a other reporting types information and described PMI-1 information correspondence described reporting.

3. method as claimed in claim 2 is characterized in that, described UE reports eNB to comprise PMI-1 information in the described moment of determining:

Report in the pattern when described, other reporting types information correspondences report reporting of parameter information constantly constantly identical with reporting of described PMI-1 information the time, described UE is according to the precedence information of reporting types information, when the priority of the reporting types of described PMI-1 information correspondence is the highest, described PMI-1 information is reported eNB.

4. the method for claim 1 is characterized in that, described UE reports CQI information to comprise:

The UE basis is less than the 2nd RI information of the RI threshold value of described setting, PMI-1 information and short-term pre-coding matrix sign PMI-2x information are determined CQI information, and report definite described CQI information, wherein PMI-2x information is reporting in the pattern of PMI-1 correspondence, and dimension multiply by the pre-coding matrix of the 2nd RI for the RI threshold value of setting.

5. the reporting system of a channel condition information is characterized in that, described system comprises:

Radio resource control RRC, be used for sending configuration information to user equipment (UE), wherein comprise the report cycle information of long-term/bandwidth pre-coding matrix sign PMI-1 information in this configuration information and report timing off-set amount information, and described report cycle is for independently reporting the report cycle of described PMI-1 information;

UE, be used to receive the configuration information that RRC sends, and according to the report cycle information that comprises in the described configuration information and report timing off-set amount information, determine to report the moment of described PMI-1 information, and the number of data streams that reports according to self sign RI information reports evolution base station eNB in the described moment of determining with channel quality information CQI information when judging described RI information greater than the RI threshold value set; Otherwise, PMI-1 information is reported eNB in the described moment of determining;

ENB is used to receive the PMI-1 information that described UE reports.

6. the reporting device of a channel condition information is characterized in that, described device comprises:

Receiver module, be used to receive the configuration information that radio resource control RRC sends, comprise the report cycle information of long-term/bandwidth pre-coding matrix sign PMI-1 information in the wherein said configuration information and report timing off-set amount information, and described report cycle is for independently reporting the report cycle of described PMI-1 information;

Determination module is used for according to described report cycle information and reports timing off-set amount information, determines to report the moment of described PMI-1 information;

Judge reporting module, the number of data streams sign RI information that is used for reporting according to self judges whether to carry out reporting of PMI-1 information;

Sending module is used in the described moment of determining channel quality information CQI information being reported evolution base station eNB when judging described RI information greater than the RI threshold value set; When judging described RI information, PMI-1 information is reported eNB in the described moment of determining smaller or equal to the RI threshold value set.

7. device as claimed in claim 6, it is characterized in that, described sending module, also be used for the pattern information that reports according to the RRC transmission, when reporting of the described reporting types that reports the information of PMI-1 described in pattern correspondence arrived constantly, constantly PMI-1 information is reported eNB, the wherein said reporting types information that reports pattern to comprise at least a other reporting types information and described PMI-1 information correspondence described reporting.

8. device as claimed in claim 7, it is characterized in that, described sending module also is used for, report in the pattern when described, other reporting types information correspondences report reporting of parameter information constantly constantly identical with reporting of described PMI-1 information the time, the precedence information of the reporting types information of described UE basis when the priority of the reporting types of described PMI-1 information correspondence is the highest, reports eNB with described PMI-1 information.

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