CN101494516B - Method and apparatus for self-adapting feedback of down channel quality - Google Patents

Method and apparatus for self-adapting feedback of down channel quality Download PDF

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Publication number
CN101494516B
CN101494516B CN2008100008436A CN200810000843A CN101494516B CN 101494516 B CN101494516 B CN 101494516B CN 2008100008436 A CN2008100008436 A CN 2008100008436A CN 200810000843 A CN200810000843 A CN 200810000843A CN 101494516 B CN101494516 B CN 101494516B
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carrier
condition
current
framenumber
last
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CN101494516A (en
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鲁绍贵
唐枫
董莉
游洪波
杨凌
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ZTE Corp
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ZTE Corp
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Abstract

The invention provides a method for self-adaptively feedbacking down channel quality and a device thereof. The device comprises a reporting condition presetting module, a channel measuring module, a reporting decision-making module and a reporting executing module. The method comprises the following steps: when the condition of reporting carrier-to-interference ratio is met, the terminal reporting the down carrier-to-interference ratio CINRcurrent to a base station; the condition of the reporting carrier-to-interference ratio being any one or any combination of the following conditions: 1. the bias of the down carrier-to-interference ratio CINRcurrent measured currently and the former reporting carrier-to-interference ratio CINRlast being larger than or equal to bias threshold of the carrier-to-interference ratio; and the bias being an absolute value of a difference value of the two; 2. the difference value Frame_Offset of the current FrameNumbercurrent and the FrameNumberlast of the former reporting carrier-to-interference ratio being larger than or equal to the frame interval threshold; and 3. the base station indicating the reporting carrier-to-interference ratio.

Description

A kind of method and apparatus of self-adapting feedback of down channel quality
Technical field
The present invention relates to the mobile radio system field, relate in particular to a kind of method and apparatus of self-adapting feedback of down channel quality.
Background technology
In the existing mobile radio system, terminal need feed back to base station BS by backward channel with forward channel information, the base station utilizes the feedback information of terminal, in real time terminal is carried out forward power control and AMC (Adaptive Modulation and Coding, Adaptive Modulation and Coding), to guarantee the communication quality and the throughput of base station and terminal.Because in mobile radio system, descending channel information is a real-time change, so feedback of down channel information that just needs terminal not stop, but the feedback of down channel informational needs takies backward channel, feedback cycle is short more, backward channel takies many more, then reverse traffic channel will reduce, and influences the flow of reverse traffic, and is opposite, if feedback cycle is long, though can reduce taking of backward channel, accurately the track terminal down channel changes, and influences the accuracy of forward power control and AMC, may cause bigger Packet Error Ratio, and then influence flow system flow.As shown in Figure 1, in the periodic report mode, report a moment (being the arrow place moment that makes progress among Fig. 1), CINR (Carrier Interference and Noise Ratio, carrier/interface ratio) all similar basically, but in fact between two report cycles, in fact very big variation has taken place in carrier/interface ratio.
This problem is outstanding especially in Wimax (micro-wave access global inter communication) system based on OFDMA (OFDM) technology, in the Wimax system, the agreement regulation can be by distributing FFBCH (Fast Feedback Channel, fast feedback channel) allows its descending channel information of terminal to report, also can allow terminal report downlink channel quality information by Fast_Polling_IE by the feedback head.But as can be known according to agreement, a FFBCH need take 3 symbols of 1 subchannel, the number of representing 4 or 5 or 6 bits, if and identical bandwidth is used for transmitting data, maximum can be transmitted 240 bits (adopting 64QAM 5/6), if therefore distribute too much FFBCH channel, will certainly influence up business throughput.Terminal need be fed back feedback content, feedback cycle, zero-time and the duration of base station by appointment among the CQICH_Allocation_IE on fast feedback channel, the content of CQICH_Allocation_IE is as shown in table 1.
Table 1, CQICH_Allocation_IE content
Grammer Syntax Size Size Note Notes
CQICH_Alloc_IE()(){
Extended?UIUC 4bits CQICH＝0x03
Length 4bits Length?in?bytes(variable).
CQICH_ID variable Index to uniquely identify the CQICH resource assigned to the SS. The size of this field is dependent on system parameter defined in UCD
Allocation?offset 6bits Index to the fast-feedback channel region marked by IUC＝0.
Period(p) 2bits A CQI feedback is transmitted on the CQICH every 2 p frames.
Frame?offset 3bits The SS starts reporting at the frame of which the number has the same 3LSB as the specified frame offset.If the current frame is specified，the SS should start reporting in eight frames.
Duration(d) 3bits A CQI feedback is transmitted on the CQI channels indexed by the CQICH_ID for 10x 2d frames. If d＝＝0，the CQI-CH is deallocated. If d＝＝0b111，the SS should report until the BS command for the SS to stop.
?… … …
?}
Because this need be determined by the base station, is difficult to determine the report cycle (period in the table 1) and the duration (Duration) of an optimum; For example, if the terminal basic fixed is motionless, channel variation slowly even does not at all just change, at this moment long report cycle is comparatively suitable, on the contrary, if the terminal fast moving, channel variation is comparatively violent, and at this moment short periodic quantity is relatively reasonable.Though report cycle can be adjusted dynamically according to statistics terminal channel variation tendency in the base station, the frequent change cycle has increased the complexity of base station and terminal processes first, and the cycle of second changing needs certain expense equally, influences throughput.Moreover dynamically adjustment also certainly exists certain delay.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method and apparatus of self-adapting feedback of down channel quality, make terminal energy self adaptation feeding back downlink carrier/interface ratio, overcome the mode imperfection of feeding back downlink carrier/interface ratio method in the current 802.16e agreement, dumb, and complicated shortcoming.
In order to address the above problem, the invention provides a kind of method of self-adapting feedback of down channel quality, comprising:
When satisfying when reporting the condition of carrier/interface ratio, terminal is with its descending carrier interference ratio C/I NR CurrentReport the base station;
The described condition that reports carrier/interface ratio is any or its combination in any in the following condition:
The descending carrier interference ratio C/I NR of first condition, current measurement CurrentWith the preceding carrier interference ratio C/I NR that once reports LastDeviation more than or equal to the carrier/interface ratio deviation threshold, described deviation is the absolute value of difference between the two;
Second condition, current frame number FrameNumber CurrentReport the frame number FrameNumber of carrier/interface ratio with the last time LastDifference Frame_Offset more than or equal to the frame period threshold value;
The 3rd condition, base station indication report carrier/interface ratio.
Further, described method specifically may further comprise the steps:
A, determine to report the condition of carrier/interface ratio, and corresponding definite carrier/interface ratio deviation threshold and/or frame period threshold value and preserve;
B, attempt access base station when terminal, and after base station and terminal got in touch, terminal reported the base station with its descending carrier/interface ratio, the carrier interference ratio C/I NR that respective record reports at this moment LastAnd/or frame number FrameNumber Last
C, the corresponding real-time measurement CINR of terminal CurrentAnd/or obtain FrameNumber Current
D, when satisfying when reporting the condition of carrier/interface ratio, terminal is with its descending carrier interference ratio C/I NR CurrentReport the base station, return step C after the undated parameter simultaneously; Report the condition of carrier/interface ratio then directly return step C if do not satisfy;
Described undated parameter is meant according to the situation of giving the correct time on this upgrades CINR LastAnd/or FrameNumber Last, make CINR Last=CINR Current, FrameNumber Last=FrameNumber Current
Further, FrameNumber CurrentWith FrameNumber LastDifference Frame_Offset divide following two kinds of situations to calculate:
First kind of situation, FrameNumber CurrentMore than or equal to FrameNumber LastThe time;
Frame_Offset＝FrameNumber current-FrameNumber last；
Second kind of situation, FrameNumber CurrentLess than FrameNumber Last
Frame_Offset＝FrameNumber current+System_Max_FrameNumber-FrameNumber last；
Wherein, System_Max_FrameNumber is the maximum frame number of native system.
Further, stipulated the system of terminal periodic feeding back downlink carrier/interface ratio for the base station:
In the steps A, determine that reporting the condition of carrier/interface ratio is the 3rd condition of first conditioned disjunction, determine carrier/interface ratio deviation threshold and preservation;
Among the step D, indication reports carrier/interface ratio or CINR when the base station CurrentWith CINR LastDeviation during more than or equal to the carrier/interface ratio deviation threshold, terminal is with its descending carrier interference ratio C/I NR CurrentReport the base station, make CINR simultaneously Last=CINR Current, return step C then; Report the condition of carrier/interface ratio then directly return step C if do not satisfy.
Further, among the step D:
If at same frame, terminal only reports carrier/interface ratio one time because more than one of above-mentioned condition satisfies and needs when reporting carrier/interface ratio simultaneously, and corresponding undated parameter CINR Last=CINR CurrentAnd/or FrameNumber Last=FrameNumber Current
Further, in the steps A:
Determining that reporting the condition of carrier/interface ratio is the 3rd condition of first conditioned disjunction, is the 3rd condition of second conditioned disjunction when first condition does not satisfy, and determines carrier/interface ratio deviation threshold and frame period threshold value and preservation;
Among the step D, indication reports carrier/interface ratio or works as CINR when the base station CurrentWith CINR LastDeviation during more than or equal to the carrier/interface ratio deviation threshold or work as CINR CurrentWith CINR LastDeviation when Frame_Offset is more than or equal to the frame period threshold value less than the carrier/interface ratio deviation threshold, terminal is with its descending carrier interference ratio C/I NR CurrentReport the base station, make CINR simultaneously Last=CINR Current, FrameNumber Last=FrameNumber Current, return step C then; Report the condition of carrier/interface ratio then directly return step C if do not satisfy.
The present invention also provides a kind of device of self-adapting feedback of down channel quality, comprising:
The report condition presetting module is used to be provided with carrier/interface ratio deviation threshold and/or frame period threshold value;
The channel measurement module is used for measuring in real time current carrier interference ratio C/I NR CurrentAnd/or obtain current frame number FrameNumber Current
Report decision-making module, be used for when judge to satisfy set in advance report the condition of carrier/interface ratio the time indication report Executive Module to report;
The described condition that reports carrier/interface ratio is any or its combination in any in the following condition:
First condition, described deviation are more than or equal to the carrier/interface ratio deviation threshold;
Second condition, described Frame_Offset are more than or equal to the frame period threshold value;
The 3rd condition, base station indication report;
The described decision-making module that reports also is used for when the condition that reports carrier/interface ratio comprises above-mentioned first condition and/or second condition, according to CINR LastAnd/or FrameNumber Last, and the CINR that obtains of channel measurement module 602 CurrentAnd/or FrameNumber Current, the corresponding CINR that obtains CurrentWith CINR LastDeviation and/or FrameNumber CurrentWith FrameNumber LastDifference Frame_Offset, described deviation is the absolute value of difference between the two; And with the respective threshold comparison of described deviation and/or Frame_Offset and the setting of report condition presetting module to judge whether to satisfy first condition and/or second condition;
Report Executive Module, be used for according to the indication CINR that the channel measurement module is measured that reports decision-making module CurrentReport, and report the corresponding renewal CINR in back LastAnd/or FrameNumber Last
Further, reporting decision-making module to obtain described Frame_Offset specifically is meant:
Work as FrameNumber CurrentMore than or equal to FrameNumber LastThe time, report decision-making module by FrameNumber Current-FrameNumber Last is littleObtain Frame_Offset;
Work as FrameNumber CurrentLess than FrameNumber LastThe time, report decision-making module by FrameNumber Current+ System_Max_FrameNumber-FrameNumber LastObtain Frame_Offset;
Wherein, System_Max_FrameNumber is the maximum frame number of native system.
Further, stipulated the system of terminal periodic feeding back downlink carrier/interface ratio for the base station:
The report condition presetting module is used to be provided with the carrier/interface ratio deviation threshold;
Report decision-making module, be used for according to CINR Last, and the CINR that obtains of channel measurement module CurrentObtain CINR CurrentWith CINR LastDeviation, if it is more than or equal to described carrier/interface ratio deviation threshold, or base station indication reports then, and indication reports Executive Module to report.
Further, the described decision-making module that reports is when satisfying more than one when satisfying simultaneously of above-mentioned condition simultaneously, and only indication reports Executive Module 604 once.
Further, determining that reporting the condition of carrier/interface ratio is the 3rd condition of first conditioned disjunction, is the 3rd condition of second conditioned disjunction when first condition does not satisfy, and determines carrier/interface ratio deviation threshold and frame period threshold value and preservation;
The report condition presetting module is used to be provided with carrier/interface ratio deviation threshold and frame period threshold value;
Report decision-making module, be used to obtain CINR LastThe CINR that obtains with the channel measurement module CurrentDeviation, and FrameNumber LastThe FrameNumber that obtains with the channel measurement module CurrentDifference Frame_Offset; Also be used for when base station indication report or described deviation during more than or equal to described carrier/interface ratio deviation threshold or described deviation less than described carrier/interface ratio deviation threshold and Frame_Offset during more than or equal to described frame period threshold value indication report Executive Module to report.
As from the foregoing, terminal automatic feedback method that the present invention proposes and device are simple, terminal can report the carrier/interface ratio situation of change accurately, the base station can be grasped the situation that forward channel changes in real time, in time carries out the selection of power control and best modulation coding mode, guarantees the reliable communication of base station and terminal, in addition on the one hand, this method and apparatus is also simpler, increases extra computing cost can for base station and terminal, and is simple.Meanwhile, even base station and terminal still adopt the FFBCH channel cycle to report, the present invention also can be used as useful replenishing of existing method, promptly working as report condition satisfies, in the time of again less than feedback cycle, terminal initiatively reports its descending channel information, to allow the base station in time understand descending channel information, be used for carrying out the selection of forward power control and modulating-coding, so, when adopting FFBCH to distribute fast feedback channel, feedback cycle setting can be longer, and such FFBCH channel just can be distributed to more terminal and share, and can effectively alleviate the situation of FFBCH channel anxiety, for example, with original feedback cycle is 8, and being revised as feedback cycle is 64, just an original channel can only can be used for 8 terminals, revise the back and just can use, totally improved 8 times for 64 users.
Description of drawings
Fig. 1 is the situation schematic diagram of descending carrier/interface ratio and report cycle when reporting by the fixed cycle in the prior art;
Fig. 2 is the concrete implementing procedure figure of the device of self-adapting feedback of down channel quality of the present invention;
Fig. 3 is the concrete enforcement block diagram of the device of self-adapting feedback of down channel quality of the present invention.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described in detail.
The invention provides a kind of method of self-adapting feedback of down channel quality, its core concept is: the condition of the descending carrier/interface ratio of definition terminal to report, when satisfying under the situation that this condition that reports carrier/interface ratio or terminal preset the descending carrier/interface ratio of terminal to report (also can be described as the forward direction carrier/interface ratio).
By this method, can allow the base station in time grasp terminal carrier/interface ratio situation, in time carry out the selection of modulation coding mode, guarantee terminal and base station proper communication and throughput.
The described condition that reports carrier/interface ratio is any or its combination in any among the following condition:
The descending carrier interference ratio C/I NR of first condition, current measurement CurrentWith the preceding carrier interference ratio C/I NR that once reports LastDeviation more than or equal to carrier/interface ratio deviation threshold CINR_report_threshold, described deviation is the absolute value of difference between the two; That is:
|CINR current-CINR last|≥CINR_report_threshold (1)
Wherein carrier/interface ratio deviation threshold CINR_report_threshold decides according to the sensitivity of expectation observation carrier/interface ratio, wish that sensitivity is high more, just with fixed more little of carrier/interface ratio deviation threshold, if require sensitivity lower, then the carrier/interface ratio deviation threshold can decide bigger.
Second condition, current frame number FrameNumber CurrentReport the frame number FrameNumber of carrier/interface ratio with the last time LastDifference Frame_Offset more than or equal to frame period threshold value CINR_report_interval; That is: Frame_Offset 〉=CINR_report_interval (2)
At first need to calculate described difference Frame_Offset, consider that the maximum frame number System_Max_FrameNumber that frame number may surpass system get back to zero, therefore divides following two kinds of situations to calculate:
When current frame number reported the frame number of carrier/interface ratio more than or equal to the last time, described difference was:
Frame_Offset＝FrameNumber current-FrameNumber last (3-1)
When current frame number reported the frame number of carrier/interface ratio less than the last time, described difference was:
Frame_Offset＝FrameNumber current+System_Max_FrameNumber-FrameNumber last (3-2)
Wherein frame period threshold value CINR_report_interval decided according to the time interval of expectation observation carrier/interface ratio, wish that the time interval that each time report is shorter, just with fixed more little of frame period threshold value, if the time interval that requires each time to report is longer, then the frame period threshold value can decide bigger.Can decide the time interval that reports of hope according to the variation severe degree of channel expection.
The 3rd condition, base station require to report carrier/interface ratio.
First report condition, be formula (1) when can guarantee that current descending carrier/interface ratio relatively reaches certain thresholding (being described carrier/interface ratio deviation threshold CINR_report_threshold) with the inclined to one side deviation of the last descending carrier/interface ratio that reports, report descending carrier/interface ratio; Second report condition, promptly formula (2) can guarantee to report descending carrier/interface ratio in certain frame number scope.So just guaranteed reporting of descending carrier/interface ratio from two aspects.The 3rd condition then can realize the compatibility with existing report method.
During practical application, according to circumstances set the described condition that reports carrier/interface ratio, can be set at terminal and report when satisfying above-mentioned first condition and/or second condition, this moment, terminal both needed to calculate the carrier/interface ratio deviation, also needed to calculate the frame number difference; Also can setting terminal only consider first or second condition, at this moment terminal just only needs in corresponding calculating carrier/interface ratio deviation and the frame number difference one; Can also be set at and judge whether earlier to satisfy one of them condition, judge whether to satisfy another condition when not satisfying again.Certainly also have other setting means, do not enumerate one by one here.
Stipulated the system of terminal periodic feedback forward direction carrier/interface ratio for the base station, can setting terminal only consider first or the 3rd condition, no longer need to consider second condition, promptly report when satisfying formula (1), the indication according to the base station periodically reports in addition, and does not need to calculate the difference of frame number, the present invention's this moment is the equal of an optimization of prior art scheme, because the mechanism that initiatively reports has been arranged, so the cycle can be than existing length, thereby save transfer resource.Simultaneously, when terminal is indicated its carrier/interface ratio of periodic feedback according to the base station, need to upgrade CINR LastCarrier/interface ratio for the terminal feedback; Also can upgrade FrameNumber simultaneously LastFrame number during for feedback.
If at same frame, terminal because in the above-mentioned condition more than one satisfy simultaneously and needs report carrier/interface ratio, at this moment, only need report one time carrier/interface ratio, consider from the angle of saving bandwidth resources, do not need terminal to repeat to feed back the forward direction carrier/interface ratio, as long as corresponding renewal CINR Last, FrameNumber LastGet final product, specifically refer to when first condition is arranged in the report condition undated parameter CINR Last=CINR CurrentWhen second condition arranged in the report condition, undated parameter FrameNumber Last=FrameNumber Current
The method of a kind of self-adapting feedback of down channel quality provided by the present invention as shown in Figure 2, specifically may further comprise the steps:
A, determine to report the condition of carrier/interface ratio, according to corresponding definite carrier/interface ratio deviation threshold of this condition and/or frame period threshold value and be kept in the terminal.
When determining the frame period threshold value, can also in this step or subsequent step, obtain the maximum frame number of native system and preserve according to the described condition needs that report carrier/interface ratio.
In this step, when determining that the described condition that reports carrier/interface ratio is that any or its combination in any in above-mentioned first, second and third condition is (such as being any condition wherein, when this condition does not satisfy, be another condition) time, then need corresponding definite carrier/interface ratio deviation threshold and/or frame period threshold value; That is: when in the condition of determining that reports carrier/interface ratio first condition being arranged, just need to determine the carrier/interface ratio deviation threshold; Same, when second condition, just need to determine the frame number difference threshold.
Such as the system that has stipulated terminal periodic feedback forward direction carrier/interface ratio for the base station, the condition that reports carrier/interface ratio is the 3rd condition of first conditioned disjunction.
B, attempt access base station when terminal, with base station synchronization, and after base station and terminal got in touch, terminal just need report the base station with its descending carrier/interface ratio, the carrier interference ratio C/I NR that respective record reports at this moment LastAnd/or frame number FrameNumber Last
Corresponding with the condition of determining in the steps A that reports carrier/interface ratio, if when the described condition that reports carrier/interface ratio comprises first condition, just need record CINR LastWhen if the described condition that reports carrier/interface ratio comprises second condition, just need record frame number FrameNumber Last
C, the descending carrier interference ratio C/I NR of the corresponding real-time measurement of terminal Current
And/or obtain current frame number FrameNumber Current
Corresponding with the condition of determining in the steps A that initiatively reports carrier/interface ratio, if when the described condition that reports carrier/interface ratio comprises first condition, just need to measure in real time descending carrier interference ratio C/I NR CurrentIf when the described condition that reports carrier/interface ratio comprises second condition, just need obtain current frame number FrameNumber Current
D, when satisfying when reporting the condition of carrier/interface ratio, terminal is with its descending carrier interference ratio C/I NR CurrentReport the base station, return step C after the undated parameter simultaneously; Report the condition of carrier/interface ratio then directly return step C if do not satisfy.
Such as when the condition of determining initiatively to report carrier/interface ratio in the steps A during, then set up or during formula (2) establishment the promptly satisfied condition that reports carrier/interface ratio when formula (1) for second condition of first conditioned disjunction; When all being false, two formulas then do not satisfy.
Stipulated the system of terminal periodic feedback forward direction carrier/interface ratio for another example for the base station, reported the condition of carrier/interface ratio just to be the 3rd condition of first conditioned disjunction, when then formula (1) is set up or base station requires to give the correct time, and promptly satisfies the condition that reports carrier/interface ratio; Formula (1) is false and the base station does not require to give the correct time then and do not satisfy.
In steps A, determine that reporting the condition of carrier/interface ratio is first condition for another example, when first condition does not satisfy second condition, satisfy the condition that reports carrier/interface ratio when then formula (1) is set up, be false and judge then whether formula (2) is set up, if this up-to-date style (2) satisfies the condition that reports carrier/interface ratio when setting up; If formula (2) also is false, then do not satisfy.
Report the condition of carrier/interface ratio also have other multiple may, can how to judge, do not enumerate one by one here according to corresponding learning above.
Described undated parameter is meant according to the situation of giving the correct time on this upgrades CINR LastAnd/or FrameNumber Last, make CINR Last=CINR Current, FrameNumber Last=FrameNumber Current
If only write down CINR among the step B LastWith frame number FrameNumber LastIn one, then also only upgrade that corresponding parameter; Otherwise two parameters all will be upgraded.
Being the system of the 3rd condition of first conditioned disjunction for the condition that reports carrier/interface ratio, is exactly to report or formula (1) when setting up when the base station indication in this step, and terminal reports, and renewal CINR Last
The present invention also provides a kind of device 600 of self-adapting feedback of down channel quality, and this installs as shown in Figure 3, comprising:
Report condition presetting module 601 is used for for manufacturer or user carrier/interface ratio deviation threshold CINR_report_threshold and/or frame period threshold value CINR_report_interval being set; Can also be used to obtain the maximum frame number System_Max_FrameNumber of system;
Described device can also comprise memory module 605, and the set threshold value of report condition presetting module 601, the maximum frame number that obtains etc. can be kept in the memory module 605.
Channel measurement module 602 is used for measuring current carrier/interface ratio in real time and/or obtaining current frame number.
Report decision-making module 603, be used for when judge to satisfy set in advance report the condition of carrier/interface ratio the time indication report Executive Module 604 to report; Also be used for when the condition that reports carrier/interface ratio comprises above-mentioned first condition and/or second condition, according to CINR LastAnd/or FrameNumber Last, and the CINR that obtains of channel measurement module 602 CurrentAnd/or FrameNumber Current, the corresponding CINR that obtains CurrentWith CINR LastDeviation and/or FrameNumber CurrentWith FrameNumber LastDifference Frame_Offset, described deviation is the absolute value of difference between the two; And with the respective threshold comparison of described deviation and/or Frame_Offset and the setting of report condition presetting module to judge whether to satisfy first condition and/or second condition.When in the above-mentioned condition more than one when satisfying simultaneously, only indication reports Executive Module 604 once.。
When threshold value, the maximum frame number that obtains etc. are kept in the memory module 605, report decision-making module 603 to obtain required threshold value, maximum frame number etc. by this memory module 605 of visit.
Report Executive Module 604, be used for according to reporting the indication of decision-making module 603 that channel measurement module 602 measured current carrier/interface ratios are delivered to the base station by eating dishes without rice or wine; Also be used for reporting the corresponding renewal CINR in back LastAnd/or FrameNumber Last
CINR LastAnd/or FrameNumber LastCan be kept at described memory module 605 or report in the decision-making module 603.
In the practical application, also memory module 605 can be incorporated into reporting in decision-making module 603 or the report condition presetting module 601.
This device can combine with existing terminal, the memory that can utilize lane terminal itself to have such as memory module 605, channel measurement module 602, report Executive Module 604 can utilize the channel measurement module of existing lane terminal and reporting module to improve respectively to obtain, as long as add report condition presetting module 601 and report decision-making module 603, just can transform the terminal that an energy self adaptation reports down channel quality as with having terminal now; Certainly this device also can be used as an independent parts and embeds terminal, utilizes terminal to measure and report.
Consistent in described report condition, determination methods, the threshold value equivalent processes, repeat no more.
Further be illustrated with two application examples of the present invention below.
Application example one, base station be the indicating terminal to report carrier/interface ratio not.
101, determining that reporting the condition of carrier/interface ratio is first condition, is second condition when first condition is false; By the CINR_report_threshold in the report condition presetting module 601 setting formulas (1) is 1.25db, CINR_report_interval in the formula (2) is 5, and obtain System_Max_FrameNumber, then these parameters are kept in the memory module 605.
102, when terminal is attempted access base station, with base station synchronization, after base station and terminal were got in touch, the channel measurement module 602 in the terminal was obtained descending carrier/interface ratio and is reported the base station, the carrier interference ratio C/I NR that reports decision-making module 603 records to report at this moment Last=16db, and frame number FrameNumber Last=12345, and it is kept in the memory module 605.
103, channel measurement module 602 is measured descending carrier interference ratio C/I NR in real time CurrentWith current frame number FrameNumber CurrentAnd send to and report decision-making module 603.
104, report decision-making module 603 to calculate CINR CurrentWith CINR LastDeviation whether more than or equal to CINR_report_threshold, if, then the indication report Executive Module 604 with current descending carrier interference ratio C/I NR CurrentReport the base station, undated parameter makes CINR simultaneously Last=CINR Current, FrameNumber Last=FrameNumber Current, and the CINR after will upgrading LastWith FrameNumber LastBe kept in the memory module 605, return step 103 then; Otherwise change step 105 over to.
105, report decision-making module 603 to calculate FrameNumber CurrentWith FrameNumber LastDifference, whether more than or equal to CINR_report_interval, if then the indication report Executive Module 604 with current descending carrier interference ratio C/I NR CurrentReport the base station, the parameter of preserving in the updated stored module 605 makes CINR simultaneously Last=CINR Current, FrameNumber Last=FrameNumber Current, change step 106 then over to; Otherwise directly return step 103.
Such as the 12346th frame, the carrier/interface ratio of measuring in the step 103 is 16.5db, i.e. CINR Current=16.5db, FrameNumber Current=12346; In step 104, carrier/interface ratio CurrentWith CINR LastDeviation less than CINR_report_threshold, therefore carry out step 105, FrameNumber CurrentAnd FrameNumber LastPoor, then return step 103, the 12347th frame is continued said process:
The 12347th frame: carrier/interface ratio is 17db, does not satisfy report condition;
The 12348th frame: carrier/interface ratio is 17.5db, reports carrier/interface ratio 17.5db to give the base station, simultaneously undated parameter: CINR Last=17.5db, FrameNumber Last=12348
Processing procedure above continuing then to repeat:
The 12349th frame: carrier/interface ratio is 17.5db, does not satisfy report condition;
The 12350th frame: carrier/interface ratio is 17.75db, does not satisfy report condition;
The 12351st frame: carrier/interface ratio is 17.5db, does not satisfy report condition;
The 12352nd frame: carrier/interface ratio is 17.25db, does not satisfy report condition;
The 12353rd frame: carrier/interface ratio is 17.25db; Satisfy the report condition in the step 5, then need to report carrier/interface ratio, and upgrade frame number: CINR Last=17.25db, FrameNumber Last=12353;
Continue to repeat the step of front then.By that analogy.
Application example two, indicating terminal per 8 frames in base station report carrier/interface ratio one time.
101, the condition of determining to report carrier/interface ratio is first or the 3rd condition; By the CINR_report_threshold in the report condition presetting module 601 setting formulas (1) is 1.25db, and obtains System_Max_FrameNumber, then these parameters is kept in the memory module 605.
102, when terminal is attempted access base station, with base station synchronization, after base station and terminal were got in touch, the channel measurement module 602 in the terminal was obtained descending carrier/interface ratio and is reported the base station, reported decision-making module 603 record (frame number FrameNumber this moment Last=23456) the carrier interference ratio C/I NR that reports Last=20db, and it is kept in the memory module 605.
103, channel measurement module 602 is measured descending carrier interference ratio C/I NR in real time CurrentWith current frame number FrameNumber CurrentAnd send to and report decision-making module 603.
104, report decision-making module 603 to calculate CINR CurrentWith CINR LastDeviation, work as CINR CurrentWith CINR LastDeviation during more than or equal to CINR_report_threshold, or when having arrived the base station and specifying the frame number that reports, then indication reports Executive Module 604 with current descending carrier interference ratio C/I NR CurrentReport the base station, the parameter of preserving in the updated stored module 605 makes CINR simultaneously Last=CINR Current, return step 103 then; Otherwise directly return step 103.
Such as the 23457th frame: carrier/interface ratio is 21db, does not satisfy report condition;
The 23458th frame: carrier/interface ratio is 22db, satisfies report condition, reports carrier/interface ratio and upgrades carrier/interface ratio, CINR Last=22db;
The 23459th frame: carrier/interface ratio is 22db, does not satisfy report condition;
The 23460th frame: carrier/interface ratio is 21db, does not satisfy report condition;
The 23461st frame: carrier/interface ratio is 20db, satisfies report condition, reports carrier/interface ratio and upgrades carrier/interface ratio, CINR Last=20db;
The 23462nd frame: carrier/interface ratio is 20db, does not satisfy report condition;
The 23463rd frame: carrier/interface ratio is 20db, does not satisfy report condition;
The 23464th frame: carrier/interface ratio is 21.75db, satisfies report condition, specifies the frame number that reports but arrived the base station, according to step 8, is reported according to the base station indication by terminal, does not need terminal initiatively to report, but needs to upgrade carrier/interface ratio, i.e. CINR Last=21.75db.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.

Claims (11)

1. the method for a self-adapting feedback of down channel quality is characterized in that, comprising:
The condition of definition terminal to report descending carrier/interface ratio is according to corresponding definite carrier/interface ratio deviation threshold of this condition and/or frame period threshold value and be kept in the terminal;
When satisfying when reporting the condition of carrier/interface ratio, terminal is with its descending carrier interference ratio C/I NR CurrentReport the base station;
The described condition that reports carrier/interface ratio is any or its combination in any in the following condition:
The descending carrier interference ratio C/I NR of first condition, current measurement CurrentWith the preceding carrier interference ratio C/I NR that once reports LastDeviation more than or equal to the carrier/interface ratio deviation threshold, described deviation is the absolute value of difference between the two;
Second condition, current frame number FrameNumber CurrentReport the frame number FrameNumber of carrier/interface ratio with the last time LastDifference Frame_Offset more than or equal to the frame period threshold value;
The 3rd condition, base station indication report carrier/interface ratio.
2. the method for claim 1 is characterized in that, specifically may further comprise the steps:
A, determine to report the condition of carrier/interface ratio, and corresponding definite carrier/interface ratio deviation threshold and/or frame period threshold value and preserve;
B, attempt access base station when terminal, and after base station and terminal got in touch, terminal reported the base station with its descending carrier/interface ratio, the carrier interference ratio C/I NR that respective record reports at this moment LastAnd/or frame number FrameNumber Last
C, the corresponding real-time measurement CINR of terminal CurrentAnd/or obtain FrameNumber Current
D, when satisfying when reporting the condition of carrier/interface ratio, terminal is with its descending carrier interference ratio C/I NR CurrentReport the base station, return step C after the undated parameter simultaneously; Report the condition of carrier/interface ratio then directly return step C if do not satisfy;
Described undated parameter is meant according to the situation of giving the correct time on this upgrades CINR LastAnd/or FrameNumber Last, make CINR Last=CINR Current, FrameNumber Last=FrameNumber Current
3. the method for claim 1 is characterized in that, FrameNumber CurrentWith FrameNumber LastDifference Frame_Offset divide following two kinds of situations to calculate:
First kind of situation, FrameNumber CurrentMore than or equal to FrameNumber LastThe time;
Frame_Offset＝FrameNumber current-FrameNumber last；
Second kind of situation, FrameNumber CurrentLess than FrameNumber Last
Frame_Offfset＝FrameNumber current+System_Max_FrameNumber-FrameNumber last；
Wherein, System_Max_FrameNumber is the maximum frame number of native system.
4. method as claimed in claim 2 is characterized in that, has stipulated the system of terminal periodic feeding back downlink carrier/interface ratio for the base station:
In the steps A, determine that reporting the condition of carrier/interface ratio is the 3rd condition of first conditioned disjunction, determine carrier/interface ratio deviation threshold and preservation;
Among the step D, indication reports carrier/interface ratio or CINR when the base station CurrentWith CINR LastDeviation during more than or equal to the carrier/interface ratio deviation threshold, terminal is with its descending carrier interference ratio C/I NR CurrentReport the base station, make CINR simultaneously Last=CINR Current, return step C then; Report the condition of carrier/interface ratio then directly return step C if do not satisfy.
5. method as claimed in claim 4 is characterized in that, among the step D:
If at same frame, terminal only reports carrier/interface ratio one time because more than one of above-mentioned condition satisfies and needs when reporting carrier/interface ratio simultaneously, and corresponding undated parameter CINR Last=CINR CurrentAnd/or FrameNumber Last=FrameNumber Current
6. method as claimed in claim 2 is characterized in that, in the steps A:
Determining that reporting the condition of carrier/interface ratio is the 3rd condition of first conditioned disjunction, is the 3rd condition of second conditioned disjunction when first condition does not satisfy, and determines carrier/interface ratio deviation threshold and frame period threshold value and preservation;
Among the step D, indication reports carrier/interface ratio or works as CINR when the base station CurrentWith CINR LastDeviation during more than or equal to the carrier/interface ratio deviation threshold or work as CINR CurrentWith CINR LastDeviation when Frame_Offset is more than or equal to the frame period threshold value less than the carrier/interface ratio deviation threshold, terminal is with its descending carrier interference ratio C/I NR CurrentReport the base station, make CINR simultaneously Last=CINR Current, FrameNumber Last=FrameNumber Current, return step C then; Report the condition of carrier/interface ratio then directly return step C if do not satisfy.
7. the device of a self-adapting feedback of down channel quality is characterized in that, comprising:
The report condition presetting module is used to be provided with carrier/interface ratio deviation threshold and/or frame period threshold value;
The channel measurement module is used for measuring in real time current carrier interference ratio C/I NR CurrentAnd/or obtain current frame number FrameNumber Current
Report decision-making module, be used for when judge to satisfy set in advance report the condition of carrier/interface ratio the time indication report Executive Module to report;
The described condition that reports carrier/interface ratio is any or its combination in any in the following condition:
The descending carrier interference ratio C/I NR of first condition, current measurement CurrentWith the preceding carrier interference ratio C/I NR that once reports LastDeviation more than or equal to the carrier/interface ratio deviation threshold;
Second condition, current frame number FrameNumber CurrentReport the frame number FrameNumber of carrier/interface ratio with the last time LastDifference Frame_Offset more than or equal to the frame period threshold value;
The 3rd condition, base station indication report;
The described decision-making module that reports also is used for when the condition that reports carrier/interface ratio comprises above-mentioned first condition and/or second condition, according to CINR LastAnd/or FrameNumber Last, and the CINR that obtains of channel measurement module CurrentAnd/or FrameNumber Current, the corresponding CINR that obtains CurrentWith CINR LastDeviation and/or FrameNumber CurrentWith FrameNumber LastDifference Frame_Offset, described deviation is the absolute value of difference between the two; And with the respective threshold comparison of described deviation and/or Frame_Offset and the setting of report condition presetting module to judge whether to satisfy first condition and/or second condition;
Report Executive Module, be used for according to the indication CINR that the channel measurement module is measured that reports decision-making module CurrentReport, and report the corresponding renewal CINR in back LastAnd/or FrameNumber Last
8. device as claimed in claim 7 is characterized in that, reports decision-making module to obtain described Frame_Offset and specifically is meant:
Work as FrameNumber CurrentMore than or equal to FrameNumber LastThe time, report decision-making module by FrameNumber Current-FrameNumber LastObtain Frame_Offset;
Work as FrameNumber CurrentLess than FrameNumber LastThe time, report decision-making module by FrameNumber Current+ System_Max_FrameNumber-FrameNumber LastObtain Frame_Offset;
Wherein, System_Max_FrameNumber is the maximum frame number of native system.
9. device as claimed in claim 7 is characterized in that, has stipulated the system of terminal periodic feeding back downlink carrier/interface ratio for the base station:
The report condition presetting module is used to be provided with the carrier/interface ratio deviation threshold;
Report decision-making module, be used for according to CINR Last, and the CINR that obtains of channel measurement module CurrentObtain CINR CurrentWith CINR LastDeviation, if it is more than or equal to described carrier/interface ratio deviation threshold, or base station indication reports then, and indication reports Executive Module to report.
10. device as claimed in claim 9 is characterized in that:
The described decision-making module that reports is worked as more than one when satisfying simultaneously of above-mentioned condition, and only indication reports Executive Module once.
11. device as claimed in claim 7 is characterized in that:
Determining that reporting the condition of carrier/interface ratio is the 3rd condition of first conditioned disjunction, is the 3rd condition of second conditioned disjunction when first condition does not satisfy, and determines carrier/interface ratio deviation threshold and frame period threshold value and preservation;
The report condition presetting module is used to be provided with carrier/interface ratio deviation threshold and frame period threshold value;
Report decision-making module, be used to obtain CINR LastThe CINR that obtains with the channel measurement module CurrentDeviation, and FrameNumber LastThe FrameNumber that obtains with the channel measurement module CurrentDifference Frame_Offset; Also be used for when base station indication report or described deviation during more than or equal to described carrier/interface ratio deviation threshold or described deviation less than described carrier/interface ratio deviation threshold and Frame_Offset during more than or equal to described frame period threshold value indication report Executive Module to report.
CN2008100008436A 2008-01-22 2008-01-22 Method and apparatus for self-adapting feedback of down channel quality Expired - Fee Related CN101494516B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1293879A (en) * 1998-03-20 2001-05-02 艾利森电话股份有限公司 Method for estimating carrier-to-interference radio in radio communication system and communication device implement the method
CN1394088A (en) * 2001-06-28 2003-01-29 华为技术有限公司 Method for estimating channel quality
WO2003017526A1 (en) * 2001-08-10 2003-02-27 Qualcomm Incorporated Method and apparatus for controlling gain level of a communication channel in a cdma communication system
WO2004079948A1 (en) * 2003-03-08 2004-09-16 Samsung Electronics Co., Ltd. System and method for performing handover operation in broadband wireless access communication system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1293879A (en) * 1998-03-20 2001-05-02 艾利森电话股份有限公司 Method for estimating carrier-to-interference radio in radio communication system and communication device implement the method
CN1394088A (en) * 2001-06-28 2003-01-29 华为技术有限公司 Method for estimating channel quality
WO2003017526A1 (en) * 2001-08-10 2003-02-27 Qualcomm Incorporated Method and apparatus for controlling gain level of a communication channel in a cdma communication system
WO2004079948A1 (en) * 2003-03-08 2004-09-16 Samsung Electronics Co., Ltd. System and method for performing handover operation in broadband wireless access communication system

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