CN102612056B - Measuring method, system and device for downlink channel quality information - Google Patents
Measuring method, system and device for downlink channel quality information Download PDFInfo
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Abstract
The invention discloses a measuring method, a measuring system and a measuring device for downlink channel quality information (CQI) for solving a reference resource for CQI measurement in indicating Release 10 in the prior art and improving the accuracy of the CQI. The method comprises the step that a terminal searches for a second downlink sub-frame containing CSI-RS (channel state information-reference signal) according to a sub-frame sequence number of a first downlink sub-frame when receiving information that triggers the CQI to report transmitted by the first downlink sub-frame through a base station, searches for a third downlink sub-frame with a sub-frame sequence number not smaller than that of the first downlink sub-frame and not greater than that of the second downlink sub-frame, and performs the CQI measurement through the second and third downlink sub-frames. According to the embodiment of the invention, two downlink sub-frames are determined through search for the CQI measurement, the problem that the CQI measurement cannot be performed can be avoided. In addition, the CQI measurement is performed through the two downlink sub-frames, so that the accuracy of the CQI measurement is improved.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relate to method of measurement, system and the device of a kind of downlink channel quality information (ChannelQuality Information, CQI).
Background technology
At Long Term Evolution (Long Term Evolution, LTE) in system, descending CQI is for reacting channel quality, normally by terminal to report to base station, this CQI comprises: available modulation coding mode (Modulation and Coding Scheme, MCS) information, precoding vectors (Precoding MatrixIndicator, PMI) information such as information and cloth slip-case for a book information (Rank Indication, RI).
In the existing Release 8 of LTE and Release 9 version, terminal is carrying out CQI gives the correct time, need the measurement carrying out channel quality according to CQI reference resources, namely according to public guide frequency reference signal (the common Reference Signal in a certain descending sub frame, CRS) carry out the measurement of channel quality, will the CQI reporting base station obtained be measured afterwards.
CRS in 3GPP TS36.213 specification in which descending sub frame of concrete regulation can as CQI reference resources.Corresponding specification specifies CQI reference resources respectively at frequency-domain and time-domain.But in Release 10 version of LTE, introduce transmission mode 9 (Transmission Mode 9, TM9) to support the multiple-input and multiple-output (Multiple-In-Multiple-Out of more high-order, MIMO) transmit, and define in TM9, terminal can only carry out the measurement of CQI based on channel state information reference signals (Channel State InformationReference Signal, CSI-RS).But CSI-RS in the density of time domain and frequency domain all lower than CRS, and the appearance cycle of CSI-RS be generally configured to 5ms or 10ms, and CRS exists in row subframe in each of the lower, and namely its cycle is 1ms.
As shown in Figure 1 when subframe comprises CSI-RS, the time domain of this subframe and the structural representation of frequency domain, wherein transverse axis is time shaft, and the longitudinal axis is frequency axis, and 0 ~ 7 represents the CSI-RS corresponding to 8 antennas respectively, square with grid background represents CRS, visible in a Resource Block (Resource Block, RB), one group of CSI-RS only takies 8 Resource Unit (Resource Element, RE), CRS takies 16 RE.
In addition, blank subframe (Almost Blank Subframe is nearly introduced in Release 10, ABS) interlayer interference in hierarchical network is avoided, the community at terminal place as shown in Figure 2 and the structural representation of the ascending-descending subframes of its neighbor cell.In ABS subframe, network side is do not send any unicast data in principle, as in figure in a radio frame, in the subframe that subframe sequence number is 1,3,5,7,9, network side does not send any unicast data, and community, terminal place so just can be made the minimum interference of its neighbor cell.Due to the introducing of ABS subframe; ABS in interfered cell is caused to protect subframe and non-ABS to protect the intensity of interference signal corresponding in these two sub-frame set of subframe to have very large difference; therefore in Release 10, introduce the mechanism of many measurement Subset; in specification, the number of specifying measurement subset is 2, and each measurement Subset is made up of some descending sub frames.Due to the allocation plan of above-mentioned ABS subframe, the possibility of result that in two measurement Subset, CQI measures is caused to there is very large difference.
And, due to the introducing of the mechanism of measurement Subset many in Release 10, when terminal by descending sub frame receive carry out information that CQI reports time, because CSI-RS can be configured to the more sparse transmission of time domain, such as its cycle is 10ms, may exist and carry the situation of measurement Subset without available CSI-RS that this carries out the descending sub frame place of the information that CQI reports, thus cause the measurement cannot carrying out CQI to report.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of downlink channel quality information method of measurement, system and device, in order to indicate the reference resources carrying out CQI measurement in Release 10, improves the accuracy that CQI measures.
The method of measurement of a kind of descending CQI that the embodiment of the present invention provides, comprising:
The information that the trigger channel quality information CQI that terminal reception base station is transmitted on the first descending sub frame reports;
According to the subframe sequence number of this first descending sub frame, in the radio frames at this descending sub frame place, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and comprise second descending sub frame of channel state information reference signals CSI-RS;
According to the subframe sequence number of this first descending sub frame and the second descending sub frame, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame;
Described second descending sub frame that employing finds and the 3rd descending sub frame carry out CQI measurement.
The measurement mechanism of a kind of descending CQI that the embodiment of the present invention provides, comprising:
Receiver module, for receiving the information that the trigger channel quality information CQI that transmits on the first descending sub frame base station reports;
Search module, for the subframe sequence number according to this first descending sub frame, in the radio frames at this descending sub frame place, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and comprise second descending sub frame of channel state information reference signals CSI-RS, according to the subframe sequence number of this first descending sub frame and the second descending sub frame, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame;
Measurement module, carries out CQI measurement for adopting described second descending sub frame that finds and the 3rd descending sub frame.
The measuring system of a kind of descending CQI that the embodiment of the present invention provides, comprising:
Base station, for transmitting the information that trigger channel quality CQI reports in the first descending sub frame;
Terminal, for receiving the information that the trigger channel quality information CQI that transmits on the first descending sub frame base station reports, according to the subframe sequence number of this first descending sub frame, in the radio frames at this descending sub frame place, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and comprise second descending sub frame of channel state information reference signals CSI-RS, according to the subframe sequence number of this first descending sub frame and the second descending sub frame, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame, described second descending sub frame that employing finds and the 3rd descending sub frame carry out CQI measurement.
Embodiments provide the method for measurement of a kind of descending CQI, system and device, in the method when terminal receives the information that base station reported by the triggering CQI that the first descending sub frame transmits, according to the subframe sequence number of this first descending sub frame, search the second descending sub frame comprising CSI-RS, and search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame, carry out CQI measurement by the second descending sub frame and the 3rd descending sub frame.Owing to determining that two descending sub frames carry out CQI measurement by searching in embodiments of the present invention, therefore can avoid the problem cannot carrying out CQI measurement, in addition owing to carrying out CQI measurement by two descending sub frames, thus the accuracy of CQI measurement can be improved.
Accompanying drawing explanation
Fig. 1 is when subframe comprises CSI-RS, the time domain of this subframe and the structural representation of frequency domain;
Fig. 2 is the structural representation of the community at terminal place and the ascending-descending subframes of its neighbor cell;
The measuring process of a kind of descending CQI that Fig. 3 provides for the embodiment of the present invention;
Fig. 4 provides the measurement of descending CQI for the embodiment of the present invention and reports process;
The structural representation of the measurement mechanism of a kind of downlink channel quality information that Fig. 5 provides for the embodiment of the present invention;
The structural representation of the measuring system of a kind of downlink channel quality information that Fig. 6 provides for the embodiment of the present invention.
Embodiment
In order to indicate the reference resources carrying out CQI measurement in Release 10 in the embodiment of the present invention, improve the accuracy that CQI measures, provide the method for measurement of a kind of descending CQI, system and device, two descending sub frames are searched in the method, comprise CSI-RS in one of them descending sub frame, carry out CQI measurement by two descending sub frames found, thus under any circumstance can realize the measurement of CQI, and carry out CQI measurement by two descending sub frames, the accuracy measured can be ensured.
Below in conjunction with Figure of description, the embodiment of the present invention is described in detail.
The measuring process of a kind of descending CQI that Fig. 3 provides for the embodiment of the present invention, this process comprises the following steps:
S301: the information that the trigger channel quality information CQI that terminal reception base station is transmitted on the first descending sub frame reports.
The information triggering CQI and report, when needing the information knowing channel quality, at a certain descending sub frame, namely the first descending sub frame is transmitted in base station.And the mode that base station notification triggers CQI reports, is generally aperiodicity CQI and reports.
S302: according to the subframe sequence number of this first descending sub frame, in the radio frames at this descending sub frame place, searches the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and comprises second descending sub frame of channel state information reference signals CSI-RS.
When the information that the triggering CQI that terminal receives base-station transmission reports, according to the subframe sequence number of this first descending sub frame, be such as N, in the radio frames at this first descending sub frame place, search the subframe sequence number that subframe sequence number is not less than this first descending sub frame, such as, and comprise second descending sub frame of this CSI-RS, the subframe sequence number of this descending sub frame is M, wherein M >=N.Namely terminal is after receiving the first descending sub frame, selects a descending sub frame comprising CSI-RS, using this descending sub frame as the second descending sub frame.
S303: according to the subframe sequence number of this first descending sub frame and the second descending sub frame, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame.
Concrete, terminal, after determining the descending sub frame comprising CSI-RS, also can select a descending sub frame again, for the descending sub frame comprising CSI-RS with this, carries out CQI measurement in the lump.
S304: described second descending sub frame that employing finds and the 3rd descending sub frame carry out CQI measurement.
Separate configurations is carried out for each CQI reference resources in the embodiment of the present invention.The information that concrete base station is reported by the first descending sub frame transmission triggering CQI, terminal needs the subframe sequence number according to this first descending sub frame, searches the descending sub frame carrying out CQI measurement.Concrete when carrying out CQI and measuring, measured by least two descending sub frames for the CQI reported in the embodiment of the present invention, one of them descending sub frame is the descending sub frame comprising CSI-RS, another descending sub frame can for not comprising the descending sub frame of CSI-RS, the concrete descending sub frame for comprising CRS.
Terminal is when after the subframe sequence number determining the first descending sub frame, in order to avoid the measurement Subset at this first descending sub frame place carries out CQI measurement without available CSI-RS, terminal is in the radio frames at this first subframe place, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and comprise second descending sub frame of CSI-RS.Namely this comprises the subframe sequence number of second descending sub frame of CSI-RS, is not less than the subframe sequence number of this first descending sub frame.
And, in embodiments of the present invention in order to ensure the accuracy that CQI measures, also need to select another to carry out the descending sub frame of CQI measurement according to the subframe sequence number of the first descending sub frame, namely the 3rd descending sub frame is selected, wherein the subframe sequence number of the 3rd descending sub frame is not less than the subframe sequence number of the first descending sub frame, and is not more than the subframe sequence number of the second descending sub frame.
Concrete when selecting the 3rd descending sub frame, determine first measurement Subset at described first descending sub frame place, in described first measurement Subset, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame.
Or, when searching the 3rd descending sub frame carrying out CQI measurement, also first measurement Subset at described first descending sub frame place can be determined, in second measurement Subset at non-described first descending sub frame place, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame.
In the said process of the embodiment of the present invention, the descending sub frame that each measurement Subset comprises can repeat, also can not repeat, the descending sub frame comprised when measurement Subset does not repeat, namely each descending sub frame is only uniquely arranged in a measurement Subset, when searching the 3rd descending sub frame carrying out CQI measurement, can in first measurement Subset at this first descending sub frame place, any one the subframe sequence number found is not less than the subframe sequence number of this first subframe, and is not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame.
Specifically such as, several descending sub frames that subframe sequence number is respectively 0 ~ 9 are comprised in a radio frames, wherein subframe sequence number be 0,2,4,6,8 descending sub frame be positioned at a measurement Subset, subframe sequence number be 1,3,5,7,9 descending sub frame be positioned at another measurement Subset, base station is that on the descending sub frame of 2, transmission triggers the information that reports of CQI in subframe sequence number.After terminal receives the information that this CQI reports, in the radio frames that subframe sequence number is 2, it is large to search comparatively this subframe sequence number 2, and comprises second descending sub frame of CSI-RS, such as, now in this radio frames, subframe sequence number be 9 descending sub frame comprise CSI-RS.
When this terminal is when searching the 3rd descending sub frame, subframe sequence number due to the 3rd descending sub frame is not less than the subframe sequence number of the first subframe, and be not more than the subframe sequence number of the second descending sub frame, now the subframe sequence number of the first subframe is 2, the subframe sequence number of the second descending sub frame is 9, therefore can determine subframe sequence number be 2 ~ 8 descending sub frame can as the 3rd descending sub frame found.Namely, when carrying out CQI and measuring, subframe sequence number can be adopted to be any one descending sub frame in 2 ~ 8, and subframe sequence number be 9 descending sub frame carry out CQI measurement.
When searching the 3rd descending sub frame at first measurement Subset at the first descending sub frame place, due to the measurement Subset at the first descending sub frame place, namely subframe sequence number is the measurement Subset at the descending sub frame place of 2, this measurement Subset comprises the descending sub frame that subframe sequence number is 0,2,4,6,8, in this measurement Subset, then search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame, therefore the subframe sequence number of known the 3rd subframe found can be 2,4,6,8.Namely, when carrying out CQI and measuring, subframe sequence number can be adopted to be any one descending sub frame in 2,4,6,8, and subframe sequence number be 9 descending sub frame carry out CQI measurement.
And when the descending sub frame comprising CSI-RS be subframe sequence number is the descending sub frame of 6, then when determining the 3rd descending sub frame, the subframe sequence number of the 3rd subframe found can be 2 ~ 5, or when the measurement Subset based on the first descending sub frame place, when searching the 3rd descending sub frame, then the subframe sequence number of the 3rd descending sub frame found can be 2 or 4.
Or, when carrying out the searching of the 3rd descending sub frame, also can measure in measurement Subset second of non-first descending sub frame place, searching and determine the 3rd descending sub frame.Specifically such as, base station is the information that on the descending sub frame of 2, transmission triggering CQI reports in subframe sequence number, subframe sequence number be 9 descending sub frame comprise CSI-RS, then when searching the 3rd descending sub frame, because non-subframe sequence number is in the measurement Subset at descending sub frame place of 2, comprise: subframe sequence number is 1, 3, 5, 7, the descending sub frame of 9, because subframe sequence number is 3, 5, comparatively subframe sequence number 2 is large for the subframe sequence number of the descending sub frame of 7, and be not more than the subframe sequence number 9 of the second descending sub frame, therefore subframe sequence number is 3, 5, any one descending sub frame of 7 can for the 3rd descending sub frame found.
Said process is the description that the descending sub frame comprised for each measurement Subset does not repeat, namely each descending subset is only unique is arranged in a measurement Subset, when the descending sub frame that measurement Subset comprises repeats, carry out the method that the 3rd descending sub frame is selected, identical with said process, just do not repeat one by one here.
In the process that above-mentioned CQI measures, terminal is the measurement of the CQI carried out for a measurement Subset, and certain terminal, when carrying out CQI and measuring, is also can carry out the measurement of CQI respectively for two measurement Subset.When terminal pins carries out the measurement of CQI respectively to two measurement Subset, because the subframe sequence number of the second descending sub frame is determined, then subframe sequence number is not less than the subframe sequence number of described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame, comprise at least one, when alternative descending sub frame is many, can select respectively to measure subframe for each measurement Subset.
Such as, group frame number be 2 ~ 8 descending sub frame can as the 3rd descending sub frame time, can, for each measurement Subset, in this measurement Subset, select the 3rd descending sub frame as the descending sub frame carrying out CQI measurement respectively.The descending sub frame being such as 2,4,6,8 due to subframe sequence number belongs to a measurement Subset, subframe sequence number be 3,5,7 descending sub frame belong to a measurement Subset, therefore search determine the 3rd descending sub frame time, can at above-mentioned two measurement Subset, in the descending sub frame satisfied condition, select a descending sub frame as the 3rd descending sub frame carrying out CQI measurement respectively, such as, descending sub frame 2 and descending sub frame 6 can be selected as the 3rd descending sub frame carrying out CQI measurement.
Or, when carrying out CQI measurement to each measurement Subset respectively, comprise when determining the second descending sub frame: determine each measurement Subset; In each measurement Subset, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame respectively, and comprise the descending sub frame of channel state information reference signals CSI-RS; Using each descending sub frame of finding as the second descending sub frame.
After determining each second descending sub frame, for each second descending sub frame search determine the 3rd descending sub frame time, according to each second descending sub frame determined for each measurement Subset, in the measurement Subset at this second descending sub frame place, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame.
Such as, now subframe sequence number be 2 the first descending sub frame on transmit the information that base station triggers CQI reports, and comprise two measurement Subset, wherein this subframe sequence number be 2 descending sub frame be arranged in the first measurement Subset, this first measurement Subset comprises the descending sub frame that subframe sequence number is 0,2,4,6,8, comprising at second measurement Subset at non-first descending sub frame place the descending sub frame that subframe sequence number is 1,3,5,7,9, is wherein comprise CSI-RS in the descending sub frame of 4 and 9 in subframe sequence number.Therefore search determine the second descending sub frame time, two the second descending sub frames can be found and be respectively two descending sub frames that subframe sequence number is 4 and 9.
When determining each second descending sub frame, when selection the 3rd descending sub frame, respectively for the second descending sub frame selected, chooser frame number is not less than the subframe sequence number of described first descending sub frame, and is not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame.Namely second descending sub frame (subframe sequence number is the descending sub frame of 4) of CSI-RS is comprised for first, can chooser frame number be 2, the descending sub frame of 3 is as the 3rd descending sub frame, second descending sub frame (subframe sequence number is the descending sub frame of 9) of CSI-RS is comprised for second, can chooser frame number be that the descending sub frame of 2 ~ 8 is as the 3rd descending sub frame, wherein in the process selected, when alternative 3rd descending sub frame exists overlapping, identical descending sub frame can be selected as the 3rd descending sub frame when selecting for twice, also different descending sub frames can be selected as the 3rd descending sub frame, can select flexibly as required when concrete selection.That the descending sub frame comprised with measurement Subset does not repeat to illustrate in said process, when descending sub frame that measurement Subset comprises repeats, determine the process of each second descending sub frame and said process similar.
In embodiments of the present invention when search determine the 3rd descending sub frame time, the method that also can specify according to existing R8, R9 version, determines the 3rd descending sub frame.In addition due to the method for measurement of the descending CQI in the embodiment of the present invention, be applicable to the situation that aperiodicity CQI reports, in R8, R9 version, CQI reference resources specified.
Therefore known, search determine the 3rd descending sub frame time, can according to the subframe sequence number of carrying out the 4th descending sub frame that CQI reports, and the difference of the subframe sequence number of described first descending sub frame, the subframe of corresponding subframe sequence number is as the 3rd descending sub frame.
Fig. 4 provides the measurement of descending CQI for the embodiment of the present invention and reports process, and this process comprises the following steps:
S401: the information that the trigger channel quality information CQI that terminal reception base station is transmitted on the first descending sub frame reports.
S402: according to the subframe sequence number of this first descending sub frame, in the radio frames at this descending sub frame place, searches the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and comprises second descending sub frame of channel state information reference signals CSI-RS.
S403: according to the subframe sequence number of this first descending sub frame and the second descending sub frame, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame.
S404: described second descending sub frame that employing finds and the 3rd descending sub frame carry out CQI measurement.
S405: according to the subframe sequence number of the second descending sub frame comprising CSI-RS, chooser frame number is greater than the sub-frame of uplink of described second descending sub frame, adopts the described CQI of described sub-frame of uplink reporting measurement.
In embodiments of the present invention after having carried out CQI measurement, terminal needs, by sub-frame of uplink, this CQI value measured is sent to base station, terminal is when selecting to determine the sub-frame of uplink carrying out CQI transmission, and the subframe sequence number of the sub-frame of uplink of selection is large compared with the subframe sequence number of the second descending sub frame comprising this CSI-RS.
During the concrete information reported for aperiodicity CQI when described base station triggers, the sub-frame of uplink that described chooser frame number is greater than described second descending sub frame comprises: the subframe sequence number of more described second descending sub frame of chooser frame number is at least not less than the subframe sequence number of 4, and corresponding sub-frame of uplink is as the sub-frame of uplink carrying out CQI and report.Preferably, the subframe sequence number of more described second descending sub frame of chooser frame number at least can be not less than 4, and sub-frame of uplink corresponding to the minimum subframe sequence number of subframe sequence number is as the sub-frame of uplink carrying out CQI and report.
Such as, when the subframe sequence number of the second descending sub frame comprising this CSI-RS is m, then, when selecting the sub-frame of uplink sending CQI, the subframe sequence number of this sub-frame of uplink of selection is m+n
cQI_ref, wherein n
cQI_refdefining method and R8, R9 version, aperiodicity CQI reports in process and determines n
cQI_refmethod identical, be the subframe sequence number at least large 4 of the second more current descending sub frame, and sub-frame of uplink corresponding to the minimum subframe sequence number of subframe sequence number is as the sub-frame of uplink carrying out CQI and report, and does not just repeat one by one here.
The structural representation of the measurement mechanism of a kind of downlink channel quality information that Fig. 5 provides for the embodiment of the present invention, this device comprises:
Receiver module 51, for receiving the information that the trigger channel quality information CQI that transmits on the first descending sub frame base station reports;
Search module 52, for the subframe sequence number according to this first descending sub frame, in the radio frames at this descending sub frame place, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and comprise second descending sub frame of channel state information reference signals CSI-RS, according to the subframe sequence number of this first descending sub frame and the second descending sub frame, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame;
Measurement module 53, carries out CQI measurement for adopting described second descending sub frame that finds and the 3rd descending sub frame.
Describedly search module 52, specifically for determining first measurement Subset at described first descending sub frame place, in described first measurement Subset, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame.
Describedly search module 52, specifically for determining first measurement Subset at described first descending sub frame place, in second measurement Subset at non-described first descending sub frame place, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame.
Describedly search module 52, specifically for determining each measurement Subset, the subframe sequence number that subframe sequence number is not less than described first descending sub frame is searched respectively in each measurement Subset, and comprise the descending sub frame of channel state information reference signals CSI-RS, using each descending sub frame of finding as the second descending sub frame.
Describedly search module 52, specifically for each second descending sub frame that basis is determined for each measurement Subset, in the measurement Subset at this second descending sub frame place, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame.
In described device,
Describedly search module 52, also for according to the subframe sequence number of the second descending sub frame comprising CSI-RS, chooser frame number is greater than the sub-frame of uplink of described second descending sub frame;
Described device also comprises:
Reporting module 54, for adopting the described CQI of described sub-frame of uplink reporting measurement.
Describedly search module 52, the subframe sequence number specifically for more described second descending sub frame of chooser frame number is at least not less than the subframe sequence number of 4, and corresponding sub-frame of uplink is as the sub-frame of uplink carrying out CQI and report.
Describedly search module 52, the subframe sequence number specifically for more described second descending sub frame of chooser frame number is at least not less than 4, and sub-frame of uplink corresponding to the minimum subframe sequence number of subframe sequence number is as the sub-frame of uplink carrying out CQI and report.
The structural representation of the measuring system of a kind of downlink channel quality information that Fig. 6 provides for the embodiment of the present invention, this system comprises:
Base station 61, for transmitting the information that trigger channel quality CQI reports in the first descending sub frame;
Terminal 62, for receiving the information that the trigger channel quality information CQI that transmits on the first descending sub frame base station reports, according to the subframe sequence number of this first descending sub frame, in the radio frames at this descending sub frame place, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and comprise second descending sub frame of channel state information reference signals CSI-RS, according to the subframe sequence number of this first descending sub frame and the second descending sub frame, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame, described second descending sub frame that employing finds and the 3rd descending sub frame carry out CQI measurement.
In described system,
Described terminal 62 also for, according to the subframe sequence number of the second descending sub frame comprising CSI-RS, chooser frame number is greater than the sub-frame of uplink of described second descending sub frame, adopts the described CQI of described sub-frame of uplink reporting measurement.
Described terminal 62 specifically for, the subframe sequence number of more described second descending sub frame of chooser frame number is at least not less than the subframe sequence number of 4, and corresponding sub-frame of uplink is as the sub-frame of uplink carrying out CQI and report.
Described terminal 62 specifically for, the subframe sequence number of more described second descending sub frame of chooser frame number is at least not less than 4, and sub-frame of uplink corresponding to the minimum subframe sequence number of subframe sequence number is as the sub-frame of uplink carrying out CQI and report.
Embodiments provide the method for measurement of a kind of descending CQI, system and device, in the method when terminal receives the information that base station reported by the triggering CQI that the first descending sub frame transmits, according to the subframe sequence number of this first descending sub frame, search the second descending sub frame comprising CSI-RS, and search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame, carry out CQI measurement by the second descending sub frame and the 3rd descending sub frame.Owing to determining that two descending sub frames carry out CQI measurement by searching in embodiments of the present invention, therefore can avoid the problem cannot carrying out CQI measurement, in addition owing to carrying out CQI measurement by two descending sub frames, thus the accuracy of CQI measurement can be improved.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (18)
1. a method of measurement for downlink channel quality information, is characterized in that, comprising:
The information that the trigger channel quality information CQI that terminal reception base station is transmitted on the first descending sub frame reports;
According to the subframe sequence number of this first descending sub frame, in the radio frames at this descending sub frame place, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and comprise second descending sub frame of channel state information reference signals CSI-RS, be specially: determine each measurement Subset; In each measurement Subset, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame respectively, and comprise the descending sub frame of channel state information reference signals CSI-RS; Using each descending sub frame of finding as the second descending sub frame.
According to the subframe sequence number of this first descending sub frame and the second descending sub frame, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the subframe sequence number of described second descending sub frame, do not comprise the 3rd descending sub frame of CSI-RS;
Described second descending sub frame that employing finds and the 3rd descending sub frame carry out CQI measurement.
2. the method for claim 1, is characterized in that, searches the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and the 3rd descending sub frame being not more than the subframe sequence number of described second descending sub frame comprises:
Determine first measurement Subset at described first descending sub frame place;
In described first measurement Subset, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame.
3. the method for claim 1, is characterized in that, searches the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and the 3rd descending sub frame being not more than the subframe sequence number of described second descending sub frame comprises:
Determine first measurement Subset at described first descending sub frame place, in second measurement Subset at non-described first descending sub frame place, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame.
4. the method for claim 1, is characterized in that, searches the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and the 3rd descending sub frame being not more than the subframe sequence number of described second descending sub frame comprises:
According to each second descending sub frame determined for each measurement Subset, in the measurement Subset at this second descending sub frame place, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame.
5. the method as described in as arbitrary in Claims 1 to 4, it is characterized in that, described method also comprises:
According to the subframe sequence number of the second descending sub frame comprising CSI-RS, chooser frame number is greater than the sub-frame of uplink of described second descending sub frame;
Adopt the described CQI of described sub-frame of uplink reporting measurement.
6. method as claimed in claim 5, is characterized in that, when the information reported for aperiodicity CQI of described base station triggers, the sub-frame of uplink that described chooser frame number is greater than described second descending sub frame comprises:
The subframe sequence number of more described second descending sub frame of chooser frame number is at least not less than the subframe sequence number of 4, and corresponding sub-frame of uplink is as the sub-frame of uplink carrying out CQI and report.
7. method as claimed in claim 6, it is characterized in that, described method also comprises:
The subframe sequence number of more described second descending sub frame of chooser frame number is at least not less than 4, and sub-frame of uplink corresponding to the minimum subframe sequence number of subframe sequence number is as the sub-frame of uplink carrying out CQI and report.
8. a measurement mechanism for downlink channel quality information, is characterized in that, described device comprises:
Receiver module, for receiving the information that the trigger channel quality information CQI that transmits on the first descending sub frame base station reports;
Search module, for the subframe sequence number according to this first descending sub frame, in the radio frames at this descending sub frame place, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and comprise second descending sub frame of channel state information reference signals CSI-RS, be specially: determine each measurement Subset, the subframe sequence number that subframe sequence number is not less than described first descending sub frame is searched respectively in each measurement Subset, and comprise the descending sub frame of channel state information reference signals CSI-RS, using each descending sub frame of finding as the second descending sub frame; According to the subframe sequence number of this first descending sub frame and the second descending sub frame, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the subframe sequence number of described second descending sub frame, do not comprise the 3rd descending sub frame of CSI-RS;
Measurement module, carries out CQI measurement for adopting described second descending sub frame that finds and the 3rd descending sub frame.
9. device as claimed in claim 8, it is characterized in that, describedly search module, specifically for determining first measurement Subset at described first descending sub frame place, in described first measurement Subset, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame.
10. device as claimed in claim 8, it is characterized in that, describedly search module, specifically for determining first measurement Subset at described first descending sub frame place, in second measurement Subset at non-described first descending sub frame place, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame.
11. devices as claimed in claim 8, it is characterized in that, describedly search module, specifically for each second descending sub frame that basis is determined for each measurement Subset, in the measurement Subset at this second descending sub frame place, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the 3rd descending sub frame of the subframe sequence number of described second descending sub frame.
12. as arbitrary in claim 8 ~ 11 as described in device, it is characterized in that, in described device,
Describedly search module, also for according to the subframe sequence number of the second descending sub frame comprising CSI-RS, chooser frame number is greater than the sub-frame of uplink of described second descending sub frame;
Described device also comprises:
Reporting module, for adopting the described CQI of described sub-frame of uplink reporting measurement.
13. devices as claimed in claim 12, it is characterized in that, describedly search module, the subframe sequence number specifically for more described second descending sub frame of chooser frame number is at least not less than the subframe sequence number of 4, and corresponding sub-frame of uplink is as the sub-frame of uplink carrying out CQI and report.
14. devices as claimed in claim 13, it is characterized in that, describedly search module, the subframe sequence number specifically for more described second descending sub frame of chooser frame number is at least not less than 4, and sub-frame of uplink corresponding to the minimum subframe sequence number of subframe sequence number is as the sub-frame of uplink carrying out CQI and report.
The measuring system of 15. 1 kinds of downlink channel quality informations, is characterized in that, described system comprises: base station and terminal, and wherein, described terminal comprises receiver module, searches module and measurement module;
Described base station, for transmitting the information that trigger channel quality CQI reports in the first descending sub frame;
The receiver module of described terminal, for receiving the information that the trigger channel quality information CQI that transmits on the first descending sub frame base station reports;
Described terminal search module, for the subframe sequence number according to this first descending sub frame, in the radio frames at this descending sub frame place, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and comprise second descending sub frame of channel state information reference signals CSI-RS, be specially: determine each measurement Subset, the subframe sequence number that subframe sequence number is not less than described first descending sub frame is searched respectively in each measurement Subset, and comprise the descending sub frame of channel state information reference signals CSI-RS, using each descending sub frame of finding as the second descending sub frame, according to the subframe sequence number of this first descending sub frame and the second descending sub frame, search the subframe sequence number that subframe sequence number is not less than described first descending sub frame, and be not more than the subframe sequence number of described second descending sub frame, do not comprise the 3rd descending sub frame of CSI-RS,
The measurement module of described terminal, carries out CQI measurement for adopting described second descending sub frame that finds and the 3rd descending sub frame.
16. systems as claimed in claim 15, it is characterized in that, in described system, described terminal also comprises: reporting module; Then
Described terminal search module also for, according to the subframe sequence number of the second descending sub frame comprising CSI-RS, chooser frame number is greater than the sub-frame of uplink of described second descending sub frame;
The reporting module of described terminal, for adopting the described CQI of described sub-frame of uplink reporting measurement.
17. systems as claimed in claim 16, is characterized in that, described terminal specifically for, the subframe sequence number of more described second descending sub frame of chooser frame number is at least not less than the subframe sequence number of 4, and corresponding sub-frame of uplink is as the sub-frame of uplink carrying out CQI and report.
18. systems as claimed in claim 16, it is characterized in that, described terminal specifically for, the subframe sequence number of more described second descending sub frame of chooser frame number is at least not less than 4, and sub-frame of uplink corresponding to the minimum subframe sequence number of subframe sequence number is as the sub-frame of uplink carrying out CQI and report.
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| WO2014107904A1 (en) * | 2013-01-14 | 2014-07-17 | Broadcom Corporation | Channel state information report triggering |
| CN103945449B (en) | 2013-01-18 | 2018-12-04 | 中兴通讯股份有限公司 | CSI measurement method and device |
| EP3089384B1 (en) | 2013-12-29 | 2019-06-19 | LG Electronics Inc. | Method for feeding back channel quality indicator in wireless communication system and apparatus therefor |
| CN104935389B (en) * | 2014-03-21 | 2020-05-19 | 中兴通讯股份有限公司 | Channel state information measuring method and device |
| WO2018126456A1 (en) | 2017-01-06 | 2018-07-12 | 广东欧珀移动通信有限公司 | Measurement method, base station and terminal |
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