CN103297176A - Method and device for feeding back and processing channel state information, user equipment and base station - Google Patents
Method and device for feeding back and processing channel state information, user equipment and base station Download PDFInfo
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- CN103297176A CN103297176A CN2012100455012A CN201210045501A CN103297176A CN 103297176 A CN103297176 A CN 103297176A CN 2012100455012 A CN2012100455012 A CN 2012100455012A CN 201210045501 A CN201210045501 A CN 201210045501A CN 103297176 A CN103297176 A CN 103297176A
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Abstract
The invention provides a method and device for feeding back and processing channel state information, user equipment and a base station. When applied to the user equipment, the method for feeding back the channel state information comprises measuring reference signals to obtain an original SINR, using an SINR offset for adjusting the original SINR to obtain a target SINR, carrying out quantization on the target SINR based on a CQI table to obtain a first CQI, feeding back the first CQI to the base station to enable the base station to be capable of reconstructing a new SINR based on the first CQI, and reconstructing the original SINR based on the target SINR obtained through reconstruction and the SINR offset. The method and device for feeding back and processing the channel state information, the user equipment and the base station can improve the accuracy of SINR reconstruction, enable the base station to be capable of carrying out dispatch in a correct mode, and improve system performance.
Description
Technical field
The present invention relates to the transmission of information in the mobile communication system, particularly a kind of feedback of channel condition information, processing method and device and subscriber equipment and base station, make that the base station can correct SINR (the Signalto Interference and Noise Ratio of reconstruct, signal and interference and noise ratio, the unit decibel, dB).
Background technology
In order to tackle the challenge of broadband access technology, and satisfy the demand of growing novel business, third generation partner program (3GPP, 3rd Generation Partnership Project) started 3G Long Term Evolution (LTE in the end of the year 2004, Long Term Evolution) standardization effort of technology wishes further to improve spectrum efficiency, improves the performance of Cell Edge User, reduce system delay, the access service of higher rate etc. is provided for the high-speed mobile user.The LTE-A technology has increased spectral bandwidth, has improved data rate, and the service of higher rate, better performance can be provided for more mobile subscribers.
In the existing version of LTE standard, in order to support higher transmission rate, the user at first needs to carry out channel estimating by measuring reference signals and obtains SINR (Signal to Interference and Noise Ratio, signal and interference and noise ratio, the unit decibel dB), is mapped as the SINR information that obtains channel quality indication (Channel Quality Index then, CQI), at last CQI is fed back to the base station end.
The base station end obtains after the CQI, the information of the SINR that can reconstruct quantizes, and then reconstruct the channel of quantification, be used for the design pre-coding matrix to reduce the interference between the user.In order to realize that Signal to Interference plus Noise Ratio SINR (Signal to Interference plus Noise Ratio) is to the mutual mapping of CQI, user side and base station end all need to store SINR of every kind of CQI and the relation curve of BLER (Block Error Rate, Block Error Rate).In the process that quantizes acquisition CQI, subscriber equipment can obtain corresponding BLER from curve according to the original SINR that first measurement module measures, and the highest CQI of transmission capacity that chooses the BLER correspondence again feeds back.Described transmission capacity is the spectrum efficiency of CQI and product (1-BLER).During base station end reconstruct SINR, according to the CQI of subscriber equipment feedback, choose BLER on the curve and be 0.1 SINR value as the SINR of reconstruct.
Defined 16 kinds of unique, fixing CQI compound modes in the LTE system, represented that by the sequence number of CQI this CQI form is seen 3GPP agreement 36.213, Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Layer Procedure.Traditional LTE system mainly considers is that (SINR's homogenous networks that statistics obtains distributes and CQI form comparison match for Homogeneous Network, HomNet) the cell transmission method that places an order.Yet in the system of LTE-A, introduced cooperative multipoint transmission (Coordinated Multiple Point transmission, CoMP) and heterogeneous network (HeterogeneousNetwork, transmission means HetNet).
Introduce after the above-mentioned cooperative multipoint transmission and heterogeneous network, base station in the LTE-A system or subscriber equipment can be operated under the different scenes, and the SINR distribution of every kind of scene is all different, when this just may cause working under some scene, SINR distributed and may exceed the SINR quantized interval that CQI quantizes the form correspondence.And in case exceed the SINR quantized interval that CQI quantizes the form correspondence, then can only report minimum CQI or maximum CQI, and the base station obtains the SINR that SINR can not truly reflect subscriber equipment by this minimum CQI or maximum CQI, just reconstruct the SINR of a mistake (error is very big in other words), can cause systematic function to reduce.
Summary of the invention
The purpose of the embodiment of the invention provides a kind of feedback, processing method and device and subscriber equipment and base station of channel condition information, make a CQI table can be used in the different scene of various SINR distributed areas, and can improve the accuracy rate of base station reconfiguration SINR.
To achieve these goals, the embodiment of the invention also provides a kind of feedback method of channel status information, be used for a subscriber equipment, preserve the CQI form that is used for SINR is mapped to CQI corresponding to the SINR quantized interval in the described subscriber equipment in advance, it is characterized in that described feedback method of channel status information comprises:
Measuring reference signals is obtained original SINR;
Use a SINR side-play amount that described original SINR is adjusted, obtain a target SINR;
Based on described CQI form one target SINR is quantized, obtain a CQI;
A described CQI is fed back to the base station, make that the base station can be based on the described new SINR of a described CQI reconstruct, and the target SINR and the described original SINR of described SINR side-play amount reconstruct that obtain based on reconstruct.
Above-mentioned feedback method of channel status information, wherein, described SINR side-play amount is determined by subscriber equipment; A described CQI is fed back in the step of base station and also described SINR side-play amount is fed back to the base station.
Above-mentioned feedback method of channel status information, wherein, described subscriber equipment is determined described SINR side-play amount according to the SINR value that measures, and makes described target SINR be positioned at described SINR quantized interval.
Above-mentioned feedback method of channel status information, wherein, described subscriber equipment is determined described SINR side-play amount according to the RSRQ value that measures.
Above-mentioned feedback method of channel status information, wherein, subscriber equipment receives described SINR side-play amount from the outside.
To achieve these goals, the embodiment of the invention also provides a kind of processing method of channel condition information, be used for a base station, preserve a CQI form that is used for reconstruct SINR corresponding to a SINR quantized interval in the described base station in advance, the processing method of described channel condition information comprises:
A CQI who one target SINR is quantized to obtain based on described CQI form who receives that subscriber equipment returns; Wherein, described target SINR is obtained by the original SINR adjustment that subscriber equipment uses a SINR side-play amount that measuring reference signals is obtained;
Obtain described target SINR based on described CQI form and a described CQI reconstruct;
The target SINR and the described SINR side-play amount that obtain based on reconstruct reconstruct described original SINR.
The processing method of above-mentioned channel condition information, wherein, described SINR side-play amount determines that by the base station processing method of described channel condition information also comprises:
Issue described SINR side-play amount and give described subscriber equipment, make described subscriber equipment can use described SINR side-play amount that described original SINR is adjusted, obtain described target SINR.
The processing method of above-mentioned channel condition information wherein, is preserved a plurality of SINR side-play amounts corresponding to different transmission states in advance in the described base station, the processing method of described channel condition information also comprises:
From described a plurality of SINR side-play amounts, select the SINR side-play amount corresponding with the current transmission state of described subscriber equipment.
The processing method of above-mentioned channel condition information, wherein, described SINR side-play amount is determined according to the RSRQ value that subscriber equipment measures in described base station.
The processing method of above-mentioned channel condition information, wherein, the CQI of subscriber equipment feedback is added up in the base station in running, and adjusts described SINR side-play amount according to statistics.
The processing method of above-mentioned channel condition information, wherein, the base station receives described SINR side-play amount from the outside.
To achieve these goals, the embodiment of the invention also provides a kind of feedback method of channel status information, be used for a communication system that comprises base station and subscriber equipment, preserve the CQI form that is used for SINR is mapped to CQI corresponding to the SINR quantized interval in described base station and the subscriber equipment in advance, described feedback method of channel status information comprises:
The subscriber equipment measuring reference signals is obtained original SINR;
Subscriber equipment uses a SINR side-play amount that described original SINR is adjusted, and obtains a target SINR;
Subscriber equipment quantizes a target SINR based on described CQI form, obtains a CQI;
Subscriber equipment feeds back to the base station with a described CQI;
The base station receives a described CQI of subscriber equipment feedback;
The base station obtains described target SINR based on described CQI form and a described CQI reconstruct;
The base station reconstructs described original SINR based on target SINR and the described SINR side-play amount that reconstruct obtains.
Above-mentioned feedback method of channel status information, wherein, described SINR side-play amount is determined by subscriber equipment; A described CQI is fed back in the step of base station and also described SINR side-play amount is fed back to the base station.
Above-mentioned feedback method of channel status information, wherein, described SINR side-play amount determines that by the base station described feedback method of channel status information also comprises:
Issue described SINR side-play amount and give described subscriber equipment, make described subscriber equipment can use described SINR side-play amount that described original SINR is adjusted, obtain described target SINR.
To achieve these goals, the embodiment of the invention also provides a kind of feedback device of channel condition information, be used for a subscriber equipment, preserve the CQI form that is used for SINR is mapped to CQI corresponding to the SINR quantized interval in the described subscriber equipment in advance, the feedback device of described channel condition information comprises:
First measurement module is used for measuring reference signals and obtains original SINR;
Adjusting module is used for using a SINR side-play amount that described original SINR is adjusted, and obtains a target SINR;
Quantization modules is used for based on described CQI form one target SINR being quantized, and obtains a CQI;
Feedback module is used for a described CQI is fed back to the base station, makes that the base station can be based on the described new SINR of a described CQI reconstruct, and the target SINR and the described original SINR of described SINR side-play amount reconstruct that obtain based on reconstruct.
The feedback device of above-mentioned channel condition information, wherein, the described SINR side-play amount of institute is determined by subscriber equipment; Described feedback module also is used for described SINR side-play amount is fed back to the base station.
The feedback device of above-mentioned channel condition information, wherein, described subscriber equipment is determined described SINR side-play amount according to the SINR value that measures, and makes described target SINR be positioned at described SINR quantized interval.
The feedback device of above-mentioned channel condition information, wherein, described subscriber equipment is determined described SINR side-play amount according to the RSRQ value that measures.
The feedback device of above-mentioned channel condition information wherein, also comprises for the unit that receives described SINR side-play amount from the outside.
To achieve these goals, the embodiment of the invention also provides a kind of processing unit of channel condition information, be used for a base station, preserve a CQI form that is used for reconstruct SINR corresponding to a SINR quantized interval in the described base station in advance, it is characterized in that the processing unit of described channel condition information comprises:
First receiver module, a CQI who one target SINR is quantized to obtain based on described CQI form who be used for to receive that subscriber equipment returns; Wherein, described target SINR is obtained by the original SINR adjustment that subscriber equipment uses a SINR side-play amount that measuring reference signals is obtained;
First reconstructed module is used for obtaining described target SINR based on described CQI form and a described CQI reconstruct;
Second reconstructed module, the target SINR and the described SINR side-play amount that are used for obtaining based on reconstruct reconstruct described original SINR.
The processing unit of above-mentioned channel condition information, wherein, described SINR side-play amount determines that by the base station processing unit of described channel condition information also comprises:
Issue module, be used for issuing described SINR side-play amount and give described subscriber equipment, make described subscriber equipment can use described SINR side-play amount that described original SINR is adjusted, obtain described target SINR.
The processing unit of above-mentioned channel condition information wherein, is preserved a plurality of SINR side-play amounts corresponding to different transmission states in advance in the described base station, the processing unit of described channel condition information also comprises:
Second selects module, is used for from the corresponding SINR side-play amount of the current transmission state of described a plurality of SINR side-play amounts selections and described subscriber equipment.
The processing unit of above-mentioned channel condition information, wherein, described SINR side-play amount is determined according to the RSRQ value that subscriber equipment measures in described base station.
The processing unit of above-mentioned channel condition information wherein, also comprises adjusting module, is used for the CQI in base station running statistics subscriber equipment feedback, and adjusts described SINR side-play amount according to statistics.
The processing unit of above-mentioned channel condition information wherein, also comprises for the unit that receives described SINR side-play amount from the outside.
To achieve these goals, the embodiment of the invention also provides a kind of subscriber equipment that comprises the feedback device of above-mentioned channel condition information.
To achieve these goals, the embodiment of the invention also provides a kind of base station that comprises the processing unit of above-mentioned channel condition information.The embodiment of the invention has following beneficial effect:
In specific embodiments of the invention, in user equipment side original SINR is carried out an adjustment, the possibility that the target SINR that makes adjustment obtain falls into the SINR quantized interval of CQI form correspondence increases greatly.And when target SINR falls into the SINR quantized interval of CQI form correspondence, the base station end just can reconstruct obtain accurate target SINR, and then reconstruct original SINR accurately according to adjustment amount, therefore can improve the accuracy of SINR reconstruct, also with regard to making the base station to dispatch in correct mode, improved systematic function.
Description of drawings
Fig. 1 a is the schematic diagram of the corresponding relation of the SINR of each CQI and BLER;
Fig. 1 b is the structural representation of the feedback device of existing channel condition information;
Fig. 2 a is the UE effluent journey schematic diagram of the feedback method of channel status information of the embodiment of the invention;
Fig. 2 b is the BS effluent journey schematic diagram of the feedback method of channel status information of the embodiment of the invention;
Fig. 3 is that the accumulated probability of the historical SINR SINR quantized interval corresponding with the CQI form is before adjustment and the corresponding relation schematic diagram after adjusting;
The handling process schematic diagram of base station and subscriber equipment when Fig. 4 a is a plurality of SINR side-play amount of preserving in advance simultaneously in subscriber equipment and base station in the embodiment of the invention corresponding to different transmission states;
Fig. 4 b is the structural representation of feedback device of channel condition information of the UE side of the embodiment of the invention.
Fig. 4 c is the structural representation of processing unit of channel condition information of the base station side of the embodiment of the invention.
Fig. 4 d is the processing unit of channel condition information of the embodiment of the invention and the cooperation schematic diagram of feedback device.
Fig. 5 is a kind of structural representation that is arranged at the adjusting module in the feedback device of channel condition information of user equipment side;
When Fig. 6-Fig. 9 is determined by the base station for described SINR side-play amount, issue the structural representation of the various specific implementations of module.
Embodiment
In the feedback of the channel condition information of the embodiment of the invention, processing method and device and subscriber equipment and the base station, by original SINR is carried out an adjustment, the possibility that the target SINR after feasible the adjustment falls into the SINR quantized interval of CQI form correspondence increases greatly.And when target SINR fell into the SINR quantized interval of CQI form correspondence, the base station end just can reconstruct obtain accurate target SINR, and then reconstructed original SINR accurately according to adjustment amount, had improved the accuracy of SINR reconstruct.
Before the embodiment of the invention was elaborated, some rudimentary knowledge to the CQI feedback briefly introduced earlier, so that better understand the embodiment of the invention.
Shown in Fig. 1 a and Fig. 1 b, all preserved a CQI form in base station and subscriber equipment, wherein recorded modulation system, code check and the efficient of each CQI correspondence.
And simultaneously, also preserved the curve of the BLER vs SINR of each CQI correspondence at base station and subscriber equipment, as shown in Figure 1a, that is to say, the CQI form correspondence that base station and subscriber equipment are preserved a SINR quantized interval, i.e. [AB] among Fig. 1 a.
When user's side is fed back, shown in Fig. 1 b, the user at first obtains original SINR, obtain corresponding BLER then, from Fig. 1 a, can find, when each SINR adopts different CQI, corresponding BLER difference, at this moment, need select the CQI that makes that transmission capacity is the highest according to the efficient that records in the CQI form.
But when SINR exceeds this scope, as original SINR much smaller than A, perhaps be slightly less than A, at this moment, the CQI of feedback is CQI0, just first CQI, and the SINR that base station end reconstruct is come out also just can only be A, so the SINR that can occur reconstructing can not correctly reflect the actual SINR of subscriber equipment, also will cause that follow-up user dispatches etc. all to go wrong, systematic function reduces.
A kind of feedback method of channel status information of the embodiment of the invention, be used for a subscriber equipment, preserve the CQI form that is used for SINR is mapped to CQI corresponding to the SINR quantized interval in the described subscriber equipment in advance, bring in from subscriber equipment, shown in Fig. 2 a, described feedback method of channel status information comprises:
And bring in from the base station, shown in Fig. 2 b, the processing method of described channel condition information comprises:
Step 15, a CQI who one target SINR is quantized to obtain based on described CQI form who receives that subscriber equipment returns; Wherein, described target SINR is obtained by the original SINR adjustment that subscriber equipment uses a SINR side-play amount that measuring reference signals is obtained;
Step 16 obtains described target SINR based on described CQI form and a described CQI reconstruct;
Step 17, the target SINR and the described SINR side-play amount that obtain based on reconstruct reconstruct described original SINR.
In the specific embodiment of the invention, it is the accuracy that needs to improve base station end reconstruct SINR, and within original SINR is positioned at described SINR quantized interval the time, then need not adjust it, in the time of only outside original SINR is positioned at described SINR quantized interval, the target SINR that just original SINR is adjusted and used adjustment to obtain feeds back, so the feedback method of channel status information of the embodiment of the invention, also comprises:
Judge that after obtaining original SINR whether described original SINR is positioned at outside the described SINR quantized interval, obtains a judged result;
When described judged result indicates described original SINR to be positioned at outside the described SINR quantized interval, enter the step that obtains described target SINR, otherwise directly based on described CQI form described original SINR is quantized, obtain and return to the base station the 2nd CQI.
Certainly, because the SINR side-play amount can be definite by subscriber equipment, also can be determined by the base station.
When the SINR side-play amount is determined by subscriber equipment, can be set to 0 or do not carry the mode informing base station of SINR side-play amount by the SINR side-play amount.
When the SINR side-play amount is determined by the base station, if subscriber equipment is not adjusted original SINR, can inform the base station by the communication mode of various existing base station-subscriber equipmenies, be not described in detail at this.
In specific embodiments of the invention, in user equipment side original SINR is carried out an adjustment, the possibility that the target SINR after feasible the adjustment falls into the SINR quantized interval of CQI form correspondence increases greatly.And when target SINR falls into the SINR quantized interval of CQI form correspondence, the base station end just can reconstruct obtain accurate target SINR, and then reconstruct original SINR accurately according to adjustment amount, therefore can improve the accuracy of SINR reconstruct, also with regard to making the base station to dispatch in correct mode, improved systematic function.
In specific embodiments of the invention, mention for the SINR side-play amount before and can be determined by subscriber equipment, also can be determined by the base station, below this dual mode is described in detail as follows respectively.
＜determined by subscriber equipment
It is multiple that subscriber equipment determines that the mode of SINR side-play amount comprises, below 2 kinds of possible implementations wherein is described as follows.
Mode one: directly determine
In the embodiment of the invention, the purpose that the SINR side-play amount is set just is to improve the possibility that the target SINR that utilizes SINR side-play amount adjustment original SINR to obtain falls into the SINR quantized interval of CQI form correspondence.
And mentioned before, base station and user equipment side have all been preserved the curve of the BLER vsSINR of each CQI correspondence, that is to say, subscriber equipment itself is the SINR quantized interval of knowing CQI form correspondence, and subscriber equipment itself must be known the original SINR that measures, thus subscriber equipment through simple calculate just can know to the original SINR adjustment what just can be so that the target SINR after the adjustment falls into the SINR quantized interval of CQI form correspondence.
Based on above understanding, the SINR side-play amount can be determined by subscriber equipment, and subscriber equipment can determine directly to make that described target SINR is positioned at the SINR side-play amount of described SINR quantized interval.
Because the base station need utilize the SINR side-play amount to come the reconstruct original SINR, so when the SINR side-play amount is determined by subscriber equipment, in subscriber equipment feeds back to a described CQI step of base station, also need described SINR side-play amount is fed back to the base station, and receive the described SINR side-play amount that subscriber equipment returns by the base station.
Mode two: determine according to Reference Signal Received Quality RSRQ
The above-mentioned user equipment side that illustrated guarantees that target SINR is positioned at the implementation of described SINR quantized interval, but user equipment side can also be determined the SINR side-play amount based on Reference Signal Received Quality RSRQ, is described as follows.
Reference Signal Received Power RSRP (Reference Signal Receiving Power) is the mean value of the signal power that receives of all RE of carrying reference signal in certain symbol;
Receiving signal strength signal intensity indication RSSI (Received Signal Strength Indicator) then is that all signals that receive in the symbol of carrying reference signal (comprise pilot signal and data-signal, adjacent area interference signal, noise signal etc.) mean value of power;
Reference Signal Received Quality RSRQ (Reference Signal Receiving Quality) then is Reference Signal Received Power RSRP (Reference Signal Receiving Power) and the ratio that receives signal strength signal intensity indication RSSI (Received Signal Strength Indicator), it is equivalent to relevant with SINR value statistic when long, therefore the SINR of statistics in the time of can being used to obtain length, such as a kind of mode of obtaining be: SINR=RSRQ/ (1-RSRQ), the SINR value of statistics can be thought this user's SINR center of distribution position during this length.
Certainly, the embodiment of the invention also can utilize in the prior art other the mode of utilizing RSRQ to calculate SINR to obtain SINR, does not enumerate one by one at this.
Therefore, under the second way, can directly determine the SINR side-play amount according to RSRQ, be described as follows.
Under this mode, described use one SINR side-play amount is adjusted described original SINR, and the step that obtains a target SINR specifically comprises:
Obtain the RSRQ value that subscriber equipment measures and calculate corresponding SINR value P;
Foundation | the P+ Δ
SINR-X|≤Δ
1The SINR offset that calculating satisfies condition
SINRX is described SINR quantized interval mid point, Δ
1Be the definite Δ that is used for that sets in advance
SINRThresholding;
Use described Δ
SINRDescribed original SINR is adjusted, obtained described target SINR;
In the described step that a described CQI is fed back to the base station also with described Δ
SINRFeed back to the base station.
Right | the P+ Δ
SINR-X|≤Δ
1Be described as follows.
The mathematics implication that this expression formula characterizes is utilized Δ exactly
SINRSINR after the adjustment drops near the mid point of SINR quantized interval, this Δ
1Can arrange as required, as being set to 5% of SINR quantized interval length, also can be set to 10%, also can be set to 0, but should not arrange excessive.
At Δ
1After determining, can pass through | the P+ Δ
SINR-X|≤Δ
1Determine Δ
SINRThe interval, then from Δ
SINRThe interval in select arbitrarily a numerical value to get final product as the SINR side-play amount.Certainly, also can pass through | the P+ Δ
SINR-X|=0 determines a unique SINR side-play amount.
But in order to reduce the feedback data amount, also can round the back as the final SINR side-play amount of using to above-mentioned definite SINR side-play amount.
Because statistic when RSRQ is SINR long, and generally speaking, acute variation can not take place in the SINR of subscriber equipment, thus the SINR of the actual measurement of subscriber equipment with calculate according to RSRQ long the time to add up the gap of SINR less.
And simultaneously above-mentioned SINR side-play amount can make the SINR that calculates according to RSRQ after adjusting drop near the mid point of SINR quantized interval, neither end points near, therefore can provide a redundancy protecting.
Based on above 2 points, the target SINR that utilizes above-mentioned SINR side-play amount that original SINR adjustment is obtained also has very big may dropping in the SINR quantized interval.
For first kind of mode, the second way is to have improved target SINR to drop on the interior possibility of SINR quantized interval, possibly can't guarantee that 100% guarantees that target SINR drops on the SINR quantized interval, but for the complete unregulated mode of prior art, still can improve the accuracy of SINR reconstruct greatly.
＜determined by the base station
In specific embodiments of the invention, described SINR side-play amount also can be definite by the base station, and be handed down to described subscriber equipment by described base station, makes subscriber equipment obtain target SINR to original SINR adjustment according to the SINR side-play amount.Be described in detail as follows.
When described SINR side-play amount was determined by the base station, the processing method of described channel condition information also comprised:
Issue described SINR side-play amount and give described subscriber equipment, make described subscriber equipment can use described SINR side-play amount that described original SINR is adjusted, obtain described target SINR.
And that the base station determines that the mode of SINR side-play amount comprises is multiple, below 3 kinds of possible implementations wherein is described as follows.
Mode one: the RSRQ that measures according to subscriber equipment determines
Mentioning before, statistic when RSRQ is SINR long, therefore, subscriber equipment can be determined the SINR side-play amount according to RSRQ, and the base station can utilize RSRQ to determine the SINR side-play amount equally.
Under this mode, the base station issues described SINR side-play amount and specifically comprises for described subscriber equipment:
Obtain the RSRQ value that subscriber equipment measures and calculate corresponding SINR value P;
Foundation | the P+ Δ
SINR-X|≤Δ
1The described SINR offset that calculating satisfies condition
SINRX is described SINR quantized interval mid point, Δ
1Be the definite Δ that is used for that sets in advance
SINRThresholding;
Issue described Δ
SINRGive described subscriber equipment.
Mode two: the Distribution Statistics according to the SINR of subscriber equipment is determined
In the mode one, be the adjustment of carrying out at unique user equipment, this just need issue its corresponding SINR side-play amount respectively at each subscriber equipment.And in mode two, for all users calculate a unified SINR side-play amount, specify as follows.
At first, the base station can distribute by the accumulated probability that off-line or mode such as online are added up a historical SINR, and this accumulated probability distributes and put down in writing the content of following two aspects:
1, historical SINR distributed area
2, SINR is lower than the shared ratio of user of x (point in the distributed area).
Just can know first ratio according to above data: historical SINR is arranged in the shared proportion of user of the SINR quantized interval of CQI form correspondence, illustrates as follows.
As shown in Figure 3, the accumulated probability of historical SINR distributes shown in the chain-dotted line of band square, wherein, historical SINR distributed area is [A B], and the SINR quantized interval of CQI form correspondence is [C D], then, to be arranged in the shared proportion of user of the SINR quantized interval of CQI form correspondence be 1-y1 to historical SINR.
Suppose a SINR offset is set
2, and utilize this SINR offset
2Historical SINR is adjusted, and the accumulated probability of then adjusting later historical SINR is distributed as shown in the chain-dotted line of the band triangle among Fig. 3, and the shared proportion of user that the historical SINR after adjust this moment is arranged in the SINR quantized interval of CQI form correspondence is y3-y2.
Then in specific embodiments of the invention, as long as y3-y2 can be greater than 1-y1, then from all users' angle, this SINR offset
2The target SINR that just can make more user utilize this SINR side-play amount adjustment to obtain can fall into the SINR quantized interval of CQI form correspondence, that is to say the accuracy of the SINR that can improve base station reconfiguration.
Under the aforesaid way, the base station issues described SINR side-play amount and specifically comprises for described subscriber equipment:
Determine described SINR side-play amount, make the ratio of winning less than second ratio, wherein: first ratio is arranged in the merchant of number of users with total number of users of described SINR quantized interval for the SINR before adjusting; Second ratio is arranged in the merchant of number of users with total number of users of described SINR quantized interval for the SINR after adjusting; SINR after the adjustment uses described SINR side-play amount that the SINR before adjusting is adjusted by the base station and obtains;
Issue described SINR side-play amount and give described subscriber equipment.
Mode three: the CQI according to the subscriber equipment feedback adjusts in real time
In the mode two, carry out statistical analysis according to historical SINR data, and in the mode three, the CQI of subscriber equipment feedback is added up in the base station in running, and adjust described SINR side-play amount according to statistics.
Specify as follows.
The base station arranges a SINR side-play amount initial value, is issued to subscriber equipment as current SINR side-play amount.
Subscriber equipment receives after the SINR side-play amount, namely uses the SINR side-play amount that receives that described original SINR is adjusted, and obtains a target SINR; Then target SINR is quantized, obtain feeding back behind the CQI;
The CQI of a certain subscriber equipment feedback in the statistics predetermined amount of time;
If at the fixed time in the section, the ratio of the quantity of all CQI that the quantity of the minimum CQI that the base station receives and base station receive surpasses the first default thresholding (as 50%, certainly can be other value, can adjust as required) time, show that current SINR side-play amount is not enough to make that target SINR falls into the interval of CQI form correspondence, and the SINR of subscriber equipment is less, so subscriber equipment can only feed back minimum CQI.In this case, just should increase the SINR side-play amount, and the SINR side-play amount after will increasing is issued to described subscriber equipment, the SINR side-play amount that makes described subscriber equipment described original SINR can be increased after the described increase obtains described target SINR;
Certainly, the ratio of finding the quantity of the quantity of the minimum CQI that the base station receives and all CQI that the base station receives after a period of time still then continues to transfer big SINR side-play amount above the first default thresholding, if the ratio of the quantity of all CQI that the quantity of the minimum CQI that the base station receives and base station receive is lower than the first default thresholding, then keep current SINR side-play amount constant.
If at the fixed time in the section, when the ratio of the quantity of all CQI that the quantity of the maximum CQI that the base station receives and base station receive is preset thresholding above second, show that current SINR side-play amount is not enough to make that target SINR falls into the interval of CQI form correspondence, and the SINR of subscriber equipment is bigger, also to increase described SINR side-play amount this moment, and the SINR side-play amount after will increasing is issued to described subscriber equipment, and the SINR side-play amount that makes described subscriber equipment described original SINR can be deducted after the described increase obtains described target SINR.
Certainly, in specific embodiment, also can always indicate the user how to adjust original SINR with the toning perfect square, also can pass through the positive and negative of SINR side-play amount, described original SINR can be added the SINR side-play amount directly obtains target SINR by subscriber equipment.
Mode four: the CQI according to the subscriber equipment feedback adjusts in real time
In the mode three, adjust in real time according to the situation of the CQI of subscriber equipment feedback, but in the mode three, might cause the SINR side-play amount generation saltus step of subscriber equipment end, last time is to add a side-play amount, becomes again to deduct a side-play amount next time, and is unfavorable to the processing of subscriber equipment.
Therefore, in mode four, the CQI of subscriber equipment feedback is added up in the base station in running, and adjusts described SINR side-play amount according to statistics.
The base station arranges a SINR side-play amount initial value, is issued to subscriber equipment as current SINR side-play amount.
Subscriber equipment receives after the SINR side-play amount, namely uses the SINR side-play amount that receives that described original SINR is adjusted, and obtains a target SINR; Then target SINR is quantized, obtain feeding back behind the CQI;
The CQI of a certain subscriber equipment feedback in the statistics predetermined amount of time;
At the fixed time in the section, when the ratio of the quantity of all CQI that the quantity of the minimum CQI that the base station receives and base station receive is preset thresholding above first, increase described SINR side-play amount, if at the fixed time in the section, when the ratio of the quantity of all CQI that the quantity of the maximum CQI that the base station receives and base station receive is preset thresholding above second, then reduce described SINR side-play amount;
SINR side-play amount after changing is issued to described subscriber equipment, makes described subscriber equipment the skew of the SINR after described original SINR and the described change can be measured and obtain afterwards described target SINR.
In the such scheme, the ratio of the quantity of the minimum CQI that receives with the base station and the quantity of all CQI that the base station receives surpasses the first default thresholding (as 50%, certainly can be other value, can adjust as required) be example, at this moment, show that current SINR side-play amount is not enough to make that target SINR falls into the interval of CQI form correspondence, and the SINR of subscriber equipment is less, so subscriber equipment can only feed back minimum CQI.
The difference of such scheme and mode three is, in the mode four, the SINR side-play amount have just have negative, and change is to increase gradually or reduce, side-play amount can be not directly by a bigger negative value jump to one bigger on the occasion of, certainly can be not directly not bigger on the occasion of jumping to a bigger negative value by one yet.
Mention before, several scenes has appearred in LTE-A, as CoMP scene, heterogeneous network scene etc., and the SINR side-play amount that this moment is can be for different scene setting different, and select corresponding SINR side-play amount to adjust according to present located scene (transmission state), be described as follows.
In mode one, can in subscriber equipment, preserve a plurality of SINR side-play amounts corresponding to different transmission states in advance, from user equipment side, described feedback method of channel status information also comprises:
Use a SINR side-play amount to determine the current transmission state of described subscriber equipment before described original SINR is adjusted, and from described a plurality of SINR side-play amounts, selecting the SINR side-play amount corresponding with the current transmission state of described subscriber equipment;
Use the SINR side-play amount of selecting that described original SINR is adjusted then.
Corresponding, the feedback device of the channel condition information of user equipment side also comprises:
First selects module, be used for using a SINR side-play amount to determine the current transmission state of described subscriber equipment before described original SINR is adjusted, and from described a plurality of SINR side-play amounts, select the SINR side-play amount corresponding with the current transmission state of described subscriber equipment;
Described adjusting module specifically is used for using the SINR side-play amount of selecting that described original SINR is adjusted.
In mode two, can in the base station, preserve a plurality of SINR side-play amounts corresponding to different transmission states in advance, from base station side, the processing method of described channel condition information also comprises:
Determine the current transmission state of subscriber equipment before giving described subscriber equipment issuing described SINR side-play amount, and from described a plurality of SINR side-play amounts, select the SINR side-play amount corresponding with the current transmission state of described subscriber equipment;
The base station issues the SINR side-play amount of selection to subscriber equipment then.
Corresponding, the processing unit of the described channel condition information of base station side also comprises:
Second selects module, is used for determining the current transmission state of subscriber equipment before giving described subscriber equipment issuing described SINR side-play amount, and selects the SINR side-play amount corresponding with the current transmission state of described subscriber equipment from described a plurality of SINR side-play amounts;
The described module that issues specifically is used for issuing the second SINR side-play amount of selecting module to select.
Certainly, also can preserve a plurality of SINR side-play amounts corresponding to different transmission states in subscriber equipment and base station simultaneously in advance, then base station this moment notifying user equipment after determining the current transmission state of subscriber equipment gets final product, and subscriber equipment knows that can select behind the current transmission state corresponding SINR side-play amount to adjust gets final product, and because subscriber equipment and base station are preserved the SINR side-play amount simultaneously in advance, then do not need informing base station this moment yet.
The coverage of supposing CQI quantification form is [A, B], such as: be [3,27] dB in the LTE system.
Be example with the CoMP situation, suppose that subscriber equipment and base station preserve a plurality of SINR side-play amounts corresponding to different transmission states simultaneously in advance, shown in Fig. 4 a, suppose that configurable SINR side-play amount is x1, x2, x3, it is the side-play amount of corresponding single cell transmission respectively, the side-play amount of the side-play amount of CoMP Serving cell and CoMP cooperation cell.Then when single cell transmission, base station and subscriber equipment all can select the SINR of x1 to adjust, and when subscriber equipment feeds back the SINR of Serving cell, then can use the SINR of x2 to adjust, and when subscriber equipment feeds back the SINR of cooperation cell, then can use the SINR of x3 to adjust.
Shown in Fig. 4 b, the feedback device of the channel condition information of the embodiment of the invention is arranged at user equipment side, preserve the CQI form that is used for SINR is mapped to CQI corresponding to the SINR quantized interval in the described subscriber equipment in advance, shown in Fig. 4 b, the feedback device of the channel condition information that is arranged at user equipment side of the embodiment of the invention comprises:
First measurement module is used for measuring reference signals and obtains original SINR;
Adjusting module is used for using a SINR side-play amount that described original SINR is adjusted, and obtains a target SINR;
Quantization modules is used for based on described CQI form one target SINR being quantized, and obtains a CQI;
Feedback module is used for a described CQI is fed back to the base station, makes that the base station can be based on the described new SINR of a described CQI reconstruct, and the target SINR and the described original SINR of described SINR side-play amount reconstruct that obtain based on reconstruct.
And the processing unit of the channel condition information that is arranged at base station side of the embodiment of the invention comprises shown in Fig. 4 c:
First receiver module, a CQI who one target SINR is quantized to obtain based on described CQI form who be used for to receive that subscriber equipment returns; Wherein, described target SINR is obtained by the original SINR adjustment that subscriber equipment uses a SINR side-play amount that measuring reference signals is obtained;
First reconstructed module is used for obtaining described target SINR based on described CQI form and a described CQI reconstruct;
Second reconstructed module, the target SINR and the described SINR side-play amount that are used for obtaining based on reconstruct reconstruct described original SINR.
And the cooperation schematic diagram of the feedback device of the channel condition information of the processing unit of the channel condition information of base station side and user equipment side is shown in Fig. 4 d.
Described SINR side-play amount can be determined by subscriber equipment, and make described target SINR be positioned at described SINR quantized interval; Described feedback module also is used for described SINR side-play amount is fed back to the base station.
Described SINR offset
SINR1Can be determined by subscriber equipment, be arranged in the feedback device of channel condition information of user equipment side adjusting module as shown in Figure 5, specifically comprise:
Acquiring unit is used for obtaining the SINR value P that RSRQ value that subscriber equipment measures calculates correspondence;
The first side-play amount determining unit is used for foundation | the P+ Δ
SINR-X|≤Δ
1The SINR offset that calculating satisfies condition
SINRX is described SINR quantized interval mid point, Δ
1Be the definite Δ that is used for that sets in advance
SINRThresholding;
First adjustment unit is used for using described Δ
SINRDescribed original SINR is adjusted, obtained described target SINR;
Described feedback module also is used for described Δ
SINRFeed back to the base station.
The feedback device that is arranged at the channel condition information of user equipment side also comprises:
Judge module is used for judging that after obtaining original SINR whether described original SINR is positioned at outside the described SINR quantized interval, obtains a judged result;
Trigger module is used for triggering described adjusting module, otherwise directly based on described CQI form described original SINR being quantized when described judged result indicates described original SINR to be positioned at outside the described SINR quantized interval, obtains and return to the base station the 2nd CQI.
Described SINR side-play amount also can be determined by the base station, and be handed down to described subscriber equipment by described base station.
When described SINR side-play amount was determined by subscriber equipment, the processing unit that is arranged at the channel condition information of base station side also comprised:
Second receiver module is used for receiving the described SINR side-play amount that subscriber equipment returns.
Described SINR side-play amount determines that by the base station processing unit that is arranged at the channel condition information of base station side also comprises:
Issue module, be used for issuing described SINR side-play amount and give described subscriber equipment, make described subscriber equipment can use described SINR side-play amount that described original SINR is adjusted, obtain described target SINR.
The described a kind of implementation that issues module is as follows, as shown in Figure 6, comprising:
The measured value acquiring unit is used for obtaining the SINR value P that RSRQ value that subscriber equipment measures calculates correspondence;
The second side-play amount determining unit is used for foundation | the P+ Δ
SINR-X|≤Δ
1The described SINR offset that calculating satisfies condition
SINRX is described SINR quantized interval mid point, Δ
1Be the definite Δ that is used for that sets in advance
SINRThresholding;
First issues the unit, is used for issuing described Δ
SINRGive described subscriber equipment.
The described another kind of implementation that issues module is as follows, and as shown in Figure 7, the described module that issues specifically comprises:
The 3rd side-play amount determining unit is used for determining described SINR side-play amount, makes the ratio of winning less than second ratio, wherein: first ratio is arranged in the merchant of number of users with total number of users of described SINR quantized interval for the SINR before adjusting; Second ratio is arranged in the merchant of number of users with total number of users of described SINR quantized interval for the SINR after adjusting; SINR after the adjustment uses described SINR side-play amount that the SINR before adjusting is adjusted by the base station and obtains;
Second issues the unit, is used for issuing described SINR side-play amount and gives described subscriber equipment.
The described module that issues can comprise: adjusting module is used for the CQI in base station running statistics subscriber equipment feedback, and adjusts described SINR side-play amount according to statistics.
Described another implementation that issues module is as follows, and as shown in Figure 8, the described module that issues specifically comprises:
Statistic unit is used for the CQI in described base station running statistics subscriber equipment feedback;
The 3rd issues the unit, be used at the fixed time in the section, when the ratio of the quantity of all CQI that the quantity of the minimum CQI that the base station receives and base station receive is preset thresholding above first, increase described SINR side-play amount, and the SINR side-play amount after will increasing is issued to described subscriber equipment, and the SINR side-play amount that makes described subscriber equipment described original SINR can be increased after the described increase obtains described target SINR;
The 4th issues the unit, be used at the fixed time in the section, when the ratio of the quantity of all CQI that the quantity of the maximum CQI that the base station receives and base station receive is preset thresholding above second, then increase described SINR side-play amount, and the SINR side-play amount after will increasing is issued to described subscriber equipment, and the SINR side-play amount that makes described subscriber equipment described original SINR can be deducted after the described increase obtains described target SINR.
Described another implementation that issues module is as follows, as shown in Figure 9, comprising:
Wherein the specific implementation of this adjusting module is as follows.
Statistic unit is used for the CQI in described base station running statistics subscriber equipment feedback;
The 4th side-play amount determining unit, be used at the fixed time in the section, when the ratio of the quantity of all CQI that the quantity of the minimum CQI that the base station receives and base station receive is preset thresholding above first, increase described SINR side-play amount, if at the fixed time in the section, when the ratio of the quantity of all CQI that the quantity of the maximum CQI that the base station receives and base station receive is preset thresholding above second, then reduce described SINR side-play amount;
The 5th issues the unit, and the SINR side-play amount after being used for changing is issued to described subscriber equipment, makes described subscriber equipment the skew of the SINR after described original SINR and the described change can be measured and obtain afterwards described target SINR.
The embodiment of the invention also provides a kind of subscriber equipment, comprising: the feedback device of the above-mentioned channel condition information that is arranged at user equipment side.
The embodiment of the invention also provides a kind of base station, comprising: the processing unit of the above-mentioned channel condition information that is arranged at base station side.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (27)
1. the processing method of a channel condition information is used for a base station, preserves a CQI form that is used for reconstruct SINR corresponding to a SINR quantized interval in the described base station in advance, it is characterized in that described feedback method of channel status information comprises:
A CQI who one target SINR is quantized to obtain based on described CQI form who receives that subscriber equipment returns; Wherein, described target SINR is obtained by the original SINR adjustment that subscriber equipment uses a SINR side-play amount that measuring reference signals is obtained;
Obtain described target SINR based on described CQI form and a described CQI reconstruct;
The target SINR and the described SINR side-play amount that obtain based on reconstruct reconstruct described original SINR.
2. the processing method of channel condition information according to claim 1 is characterized in that, described SINR side-play amount determines that by the base station processing method of described channel condition information also comprises:
Issue described SINR side-play amount and give described subscriber equipment, make described subscriber equipment can use described SINR side-play amount that described original SINR is adjusted, obtain described target SINR.
3. the processing method of channel condition information according to claim 2 is characterized in that, preserves a plurality of SINR side-play amounts corresponding to different transmission states in the described base station in advance, and the processing method of described channel condition information also comprises:
From described a plurality of SINR side-play amounts, select the SINR side-play amount corresponding with the current transmission state of described subscriber equipment.
4. the processing method of channel condition information according to claim 2 is characterized in that, described SINR side-play amount is determined according to the RSRQ value that subscriber equipment measures in described base station.
5. the processing method of channel condition information according to claim 2 is characterized in that, also comprises:
The CQI of subscriber equipment feedback is added up in the base station in running, and adjusts described SINR side-play amount according to statistics.
6. the processing method of channel condition information according to claim 1 is characterized in that, also comprises:
The base station receives described SINR side-play amount from the outside.
7. feedback method of channel status information, be used for a subscriber equipment, preserve the CQI form that is used for SINR is mapped to CQI corresponding to the SINR quantized interval in the described subscriber equipment in advance, it is characterized in that described feedback method of channel status information comprises:
Measuring reference signals is obtained original SINR;
Use a SINR side-play amount that described original SINR is adjusted, obtain a target SINR;
Based on described CQI form one target SINR is quantized, obtain a CQI;
A described CQI is fed back to the base station, make that the base station can be based on the described new SINR of a described CQI reconstruct, and the target SINR and the described original SINR of described SINR side-play amount reconstruct that obtain based on reconstruct.
8. feedback method of channel status information according to claim 7 is characterized in that, described SINR side-play amount is determined by subscriber equipment; A described CQI is fed back in the step of base station and also described SINR side-play amount is fed back to the base station.
9. feedback method of channel status information according to claim 8 is characterized in that, described subscriber equipment is determined described SINR side-play amount according to the SINR value that measures, and makes described target SINR be positioned at described SINR quantized interval.
10. feedback method of channel status information according to claim 8 is characterized in that, described subscriber equipment is determined described SINR side-play amount according to the RSRQ value that measures.
11. feedback method of channel status information according to claim 7 is characterized in that, also comprises:
Subscriber equipment receives described SINR side-play amount from the outside.
12. feedback method of channel status information, be used for a communication system that comprises base station and subscriber equipment, preserve the CQI form that is used for SINR is mapped to CQI corresponding to the SINR quantized interval in described base station and the subscriber equipment in advance, it is characterized in that described feedback method of channel status information comprises:
The subscriber equipment measuring reference signals is obtained original SINR;
Subscriber equipment uses a SINR side-play amount that described original SINR is adjusted, and obtains a target SINR;
Subscriber equipment quantizes a target SINR based on described CQI form, obtains a CQI;
Subscriber equipment feeds back to the base station with a described CQI;
The base station receives a described CQI of subscriber equipment feedback;
The base station obtains described target SINR based on described CQI form and a described CQI reconstruct;
The base station reconstructs described original SINR based on target SINR and the described SINR side-play amount that reconstruct obtains.
13. feedback method of channel status information according to claim 12 is characterized in that, described SINR side-play amount is determined by subscriber equipment; A described CQI is fed back in the step of base station and also described SINR side-play amount is fed back to the base station.
14. feedback method of channel status information according to claim 12 is characterized in that, described SINR side-play amount determines that by the base station described feedback method of channel status information also comprises:
Issue described SINR side-play amount and give described subscriber equipment, make described subscriber equipment can use described SINR side-play amount that described original SINR is adjusted, obtain described target SINR.
15. the processing unit of a channel condition information is used for a base station, preserves a CQI form that is used for reconstruct SINR corresponding to a SINR quantized interval in the described base station in advance, it is characterized in that the processing unit of described channel condition information comprises:
First receiver module, a CQI who one target SINR is quantized to obtain based on described CQI form who be used for to receive that subscriber equipment returns; Wherein, described target SINR is obtained by the original SINR adjustment that subscriber equipment uses a SINR side-play amount that measuring reference signals is obtained;
First reconstructed module is used for obtaining described target SINR based on described CQI form and a described CQI reconstruct;
Second reconstructed module, the target SINR and the described SINR side-play amount that are used for obtaining based on reconstruct reconstruct described original SINR.
16. the processing unit of channel condition information according to claim 15 is characterized in that, described SINR side-play amount determines that by the base station processing unit of described channel condition information also comprises:
Issue module, be used for issuing described SINR side-play amount and give described subscriber equipment, make described subscriber equipment can use described SINR side-play amount that described original SINR is adjusted, obtain described target SINR.
17. the processing unit of channel condition information according to claim 16 is characterized in that, preserves a plurality of SINR side-play amounts corresponding to different transmission states in the described base station in advance, the processing unit of described channel condition information also comprises:
Second selects module, is used for from the corresponding SINR side-play amount of the current transmission state of described a plurality of SINR side-play amounts selections and described subscriber equipment.
18. the processing unit of channel condition information according to claim 16 is characterized in that, described SINR side-play amount is determined according to the RSRQ value that subscriber equipment measures in described base station.
19. the processing unit of channel condition information according to claim 16 is characterized in that, also comprises:
Adjusting module is used for the CQI in base station running statistics subscriber equipment feedback, and adjusts described SINR side-play amount according to statistics.
20. the processing unit of channel condition information according to claim 15 is characterized in that, also comprises:
Be used for receiving from the outside unit of described SINR side-play amount.
21. the feedback device of a channel condition information, be used for a subscriber equipment, preserve the CQI form that is used for SINR is mapped to CQI corresponding to the SINR quantized interval in the described subscriber equipment in advance, it is characterized in that the feedback device of described channel condition information comprises:
First measurement module is used for measuring reference signals and obtains original SINR;
Adjusting module is used for using a SINR side-play amount that described original SINR is adjusted, and obtains a target SINR;
Quantization modules is used for based on described CQI form one target SINR being quantized, and obtains a CQI;
Feedback module is used for a described CQI is fed back to the base station, makes that the base station can be based on the described new SINR of a described CQI reconstruct, and the target SINR and the described original SINR of described SINR side-play amount reconstruct that obtain based on reconstruct.
22. the feedback device of channel condition information according to claim 21 is characterized in that, described SINR side-play amount is determined by subscriber equipment; Described feedback module also is used for described SINR side-play amount is fed back to the base station.
23. the feedback device of channel condition information according to claim 22 is characterized in that, described subscriber equipment is determined described SINR side-play amount according to the SINR value that measures, and makes described target SINR be positioned at described SINR quantized interval.
24. the feedback device of channel condition information according to claim 22 is characterized in that, described subscriber equipment is determined described SINR side-play amount according to the RSRQ value that measures.
25. the feedback device of channel condition information according to claim 21 is characterized in that, also comprises:
Be used for receiving from the outside unit of described SINR side-play amount.
26. a base station is characterized in that, comprising: the processing unit of any described channel condition information among the claim 15-20.
27. a subscriber equipment is characterized in that, comprising: the feedback device of any described channel condition information among the claim 21-25.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012100455012A CN103297176A (en) | 2012-02-24 | 2012-02-24 | Method and device for feeding back and processing channel state information, user equipment and base station |
| JP2013020649A JP6037870B2 (en) | 2012-02-24 | 2013-02-05 | Channel state information feedback, processing method and apparatus, user equipment, base station |
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| CN2012100455012A CN103297176A (en) | 2012-02-24 | 2012-02-24 | Method and device for feeding back and processing channel state information, user equipment and base station |
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| CN106487475A (en) * | 2015-08-31 | 2017-03-08 | 展讯通信（上海）有限公司 | CQI acquisition methods and device |
| CN106487475B (en) * | 2015-08-31 | 2019-03-19 | 展讯通信（上海）有限公司 | CQI acquisition methods and device |
| CN114073022A (en) * | 2019-07-18 | 2022-02-18 | 瑞典爱立信有限公司 | CQI saturation mitigation in large-scale MU-MIMO systems |
| CN112636850A (en) * | 2019-10-08 | 2021-04-09 | 上海朗帛通信技术有限公司 | Method and equipment used for wireless communication |
| WO2021068727A1 (en) * | 2019-10-08 | 2021-04-15 | 上海朗帛通信技术有限公司 | Method and device for use in wireless communication |
| CN112636850B (en) * | 2019-10-08 | 2023-05-26 | 上海朗帛通信技术有限公司 | Method and apparatus for wireless communication |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6037870B2 (en) | 2016-12-07 |
| JP2013176039A (en) | 2013-09-05 |
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