CN103297999A - Scheduling request false-alarm threshold value adjusting method and device - Google Patents
Scheduling request false-alarm threshold value adjusting method and device Download PDFInfo
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Abstract
The invention discloses a scheduling request (SR) false-alarm threshold value adjusting method and device. The method comprises the steps that times of SR false-alarm detecting within preset detecting times are counted; SR false-alarm probability is computed according to detected SR false-alarm times; a preset SR false-alarm threshold value is adjusted according to the SR false-alarm probability. According to the SR false-alarm threshold value adjusting method and device, the problem that no methods capable of adjusting the fixed threshold value exist in related technologies, so that under the fixed threshold value, false alarm always happens, and system resource waste is caused is solved, and accordingly the threshold can be adjusted in real time, the SR false-alarm probability is lowered, system performance is improved, and downlink traffic is improved.
Description
Technical field
The present invention relates to the communications field, in particular to method and the device of a kind of adjustment dispatch request (Scheduling request abbreviates SR as) false-alarm threshold value.
Background technology
Long Term Evolution (Long Term Evolution, abbreviate LTE as) in the system, subscriber equipment (User Equipment, abbreviate UE as) employing Physical Uplink Control Channel (Physical Uplink Control Channel, abbreviate PUCCH as) send ascending control information to evolved base station (Evolved Node B abbreviates eNodeB as).PUCCH supports multiple form, for example, can set form 1, is used for UE and sends SR to eNodeB; Form 1a, be used for UE sends the automatic repeat requests of mixing (Hybrid Automatic Repeat reQuest from 1 bit to eNodeB, abbreviate HARQ as) correctly reply (Acknowledge abbreviates ACK as) or wrong responses (Non-Acknowledge abbreviates NACK as) information; Form 1b is used for UE sends HARQACK from 2 bits to eNodeB or NACK.For form 2,2a, 2b, be used for UE to the indication of eNodeB transmitting channel quality (Channel Quality Indicator abbreviates CQI as) and HARQ ACK or nack message.
Ascending control channel is Code Channel, the control information of different UEs can multiplexing same time (Resource Block, abbreviate RB as), because control information carrying bit is fewer, so multiplexing between the different UEs control information is by using different cyclic shifts and/or orthogonal spreading sequence to realize.The multiplex mode that control information adopts above-mentioned frequency domain code division multiplexing (cyclic shift) to combine with time domain code division multiplexing (orthogonal spreading sequence), the system that makes effectively supports the control information transmission of multi-user, little load, and has improved the ability to work of system under the low signal-to-noise ratio situation.
Form 1 is used for UE and sends SR to eNodeB, and the user applies upstream data sends the new biography resource, when UE has upstream data to send out, can send forward (Positive) SR in SR cycle and the subframe skew of base station configuration.Although UE sends SR in the skew of each cycle and subframe, the base station must be in the detection of getting on of cycle of each SR and skew subframe, to avoid omission, for this reason, with regard to the inevitable SR false-alarm problem of having introduced.So-called false-alarm is exactly what UE under the situation about not sending at, and base station side has also detected signal.
In case the SR false-alarm will make a big impact to system: can additionally increase scheduling overhead on the one hand; When being operated in battery saving mode meeting of following time, UE need activate the business of doing because the false-alarm of SR cause the base station to take for UE on the other hand; Moreover, under some scene, the SR false-alarm also can cause descending ACK feedback information parsing to make mistakes, for example, descending downloading service, ascending control channel PUCCH need the ACK information of feeding back downlink Traffic Channel, if SR and ACK needed to send in the same moment, because the false-alarm of SR causes the base station to be thought by mistake is that SR and ACK are multiplexing, cause ACK to resolve and make mistakes, thereby influence downlink traffic so.LTE ascending control channel receiver SR detects to handle and generally will separate permanent envelope zero autocorrelation sequence (CAZAC) earlier, separates orthogonal spectrum expansion then, does discontinuous transmission (Discontinuous Transmission abbreviates DTX as) judgement at last.Generally, analyze by the test of many times analogue simulation, can draw a DTX decision threshold that satisfies the SR under the given false alarm probability, but this fixed threshold judges often do not have general applicability.In the correlation technique, do not have a kind of method that can adjust this fixed gate limit value, make that false-alarm often takes place under the fixed gate limit value, cause resource waste.
Summary of the invention
The invention provides a kind of method and device of the SR of adjustment false-alarm threshold value, to solve at least in the correlation technique, do not have a kind of method that can adjust this fixed gate limit value, make that false-alarm often takes place under the fixed gate limit value, cause the problem of resource waste.
According to an aspect of the present invention, provide a kind of method of the SR of adjustment false-alarm threshold value, having comprised: statistics is at the default number of times that detects the SR false-alarm in the number of times that detects; Number of times according to detected described SR false-alarm calculates the SR false alarm probability; The SR false-alarm threshold value default according to the adjustment of described SR false alarm probability.
Preferably, detecting described SR false-alarm comprises: judge that whether signal to noise ratio on other control channel of the current subframe of UE is greater than the discontinuous transmitting DTX signal to noise ratio on the SR channel, if then confirm to detect the SR false-alarm, wherein, the DTX signal to noise ratio on the described SR channel is described SR false-alarm threshold value.
Preferably, other control channel comprises: channel quality indicator (CQI) channel and/or reply ack channel.
Preferably, before detecting described SR false-alarm, also comprise: if detect forward SR in the cycle of current subframe SR, then carry out described SR false-alarm and detect.
Preferably, detecting described SR false-alarm comprises one of following: current subframe is the cycle of SR, and arrive the feedback moment of replying ACK, but the cycle of no show channel quality indicator (CQI), then relatively the DTX signal to noise ratio on the ACK code channel whether greater than the DTX signal to noise ratio on the described SR channel, if confirm that then described SR is false-alarm; Current subframe is the cycle of SR, and arrives the cycle of CQI, the feedback of no show ACK constantly, then relatively the signal to noise ratio on the CQI channel whether greater than the DTX signal to noise ratio on the described SR channel, if confirm that then described SR is false-alarm; Current subframe is the cycle of SR, and the feedback that arrives cycle of CQI and ACK is constantly, allows CQI and ACK to pass simultaneously simultaneously, then relatively the signal to noise ratio on the CQI channel whether greater than the DTX signal to noise ratio on the described SR channel, if determine that then described SR is false-alarm; Current subframe is the cycle of SR, and arrive the feedback of cycle of CQI and ACK constantly, do not allow CQI and ACK to pass simultaneously simultaneously, then relatively the DTX signal to noise ratio on the ACK code channel whether greater than the DTX signal to noise ratio on the described SR channel, if determine that then described SR is false-alarm; If not, then relatively the signal to noise ratio on the CQI channel whether greater than the DTX signal to noise ratio on the described SR channel, if determine that then described SR is false-alarm.
Preferably, the SR false-alarm threshold value default according to the adjustment of described SR false alarm probability comprises: judge whether described SR false alarm probability is adjusted between the corresponding false alarm probability of level at default thresholding, wherein, described default thresholding adjustment level is made of first threshold value and second threshold value, and first threshold value is less than second threshold value, and wherein said first threshold value is described default SR false-alarm threshold value; If then between described first threshold value and second threshold value, adjust described default SR false-alarm threshold value by default step-length; When adjusting the default adjustment of number of times arrival number of times, stop to adjust described default SR false-alarm threshold value.
Preferably, the SR false-alarm threshold value default according to the adjustment of described SR false alarm probability comprises: if described SR false alarm probability is adjusted grade number of times of second threshold value correspondence probability greater than preset times greater than described default thresholding, then enter next thresholding adjustment level and adjust.
According to a further aspect in the invention, provide a kind of device of the SR of adjustment false-alarm threshold value, having comprised: statistical module is used for statistics at the default number of times that detects the SR false-alarm in the number of times that detects; Computing module is used for calculating the SR false alarm probability according to the number of times of detected described SR false-alarm; Adjusting module is used for the SR false-alarm threshold value default according to the adjustment of described SR false alarm probability.
Preferably, described statistical module comprises: judging unit is used for judging that whether signal to noise ratio on other control channel of the current subframe of UE is greater than the discontinuous transmitting DTX signal to noise ratio on the SR channel; Confirmation unit is used under the situation of the signal to noise ratio on other control channel of the current subframe of UE greater than the discontinuous transmitting DTX signal to noise ratio on the SR channel, confirms to detect the SR false-alarm, and wherein, the DTX signal to noise ratio on the described SR channel is described SR false-alarm threshold value.
Preferably, described device also comprises: Executive Module, be used for detecting under the situation of forward SR in the cycle of current subframe SR, and carry out described SR false-alarm and detect.
The present invention has adopted following method: statistics is at the default number of times that detects the SR false-alarm in the number of times that detects; Number of times according to detected SR false-alarm calculates the SR false alarm probability; The SR false-alarm threshold value default according to the adjustment of SR false alarm probability namely carried out false-alarm to SR and detected, and the statistics false-alarm detects the probability that detects in the number of times total, utilize this probability to adjust threshold value, solved in the correlation technique, do not had a kind of method that can adjust this fixed gate limit value, made under the fixed gate limit value, false-alarm often takes place, cause the problem of resource waste, and then can adjust thresholding in real time, reduce the SR false alarm probability, improve systematic function, promote downlink traffic.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not constitute improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the method for the adjustment SR false-alarm threshold value of the embodiment of the invention;
Fig. 2 is the flow chart of SR false-alarm detection method according to the preferred embodiment of the invention;
Fig. 3 is the flow chart of adjusting SR threshold value method according to the preferred embodiment of the invention;
Fig. 4 is the structured flowchart one according to the device of the adjustment SR false-alarm threshold value of the embodiment of the invention;
Fig. 5 is the structured flowchart two according to the device of the adjustment SR false-alarm threshold value of the embodiment of the invention;
Fig. 6 is the structured flowchart three according to the device of the adjustment SR false-alarm threshold value of the embodiment of the invention.
Embodiment
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
In the LTE system, the false-alarm of SR can cause the behavior of base station erroneous judgement UE, thereby causes extra scheduling overhead, also can influence downlink traffic under some scene.Based on above-mentioned situation, the embodiment of the invention provides a kind of method of the SR of adjustment false-alarm threshold value, and as shown in Figure 1, the method comprising the steps of S102 is to step S106:
Step S102, statistics is at the default number of times that detects the SR false-alarm in the number of times that detects;
Step S104 calculates the SR false alarm probability according to the number of times of detected SR false-alarm;
Step S106, the SR false-alarm threshold value default according to the adjustment of SR false alarm probability.
The embodiment of the invention has adopted following method: statistics is at the default number of times that detects the SR false-alarm in the number of times that detects; Number of times according to detected SR false-alarm calculates the SR false alarm probability; The SR false-alarm threshold value default according to the adjustment of SR false alarm probability namely carried out false-alarm to SR and detected, and the statistics false-alarm detects the probability that detects in the number of times total, utilize this probability to adjust threshold value, solved in the correlation technique, do not had a kind of method that can adjust this fixed gate limit value, made under the fixed gate limit value, false-alarm often takes place, cause the problem of resource waste, and then can adjust thresholding in real time, reduce the SR false alarm probability, improve systematic function, promote downlink traffic.
In the process of execution in step S102, need to detect the SR false-alarm, this process can comprise following processing: judge that whether signal to noise ratio on other control channel of the current subframe of UE is greater than the discontinuous transmitting DTX signal to noise ratio on the SR channel, if, then confirm to detect the SR false-alarm, wherein, the DTX signal to noise ratio on the SR channel is SR false-alarm threshold value.Wherein, other control channel can comprise the channel quality indicator (CQI) channel or reply ack channel, or the combination of two kinds of channels.
In implementation process, SR false-alarm threshold value has its prerequisite, the process that namely obtains SR false-alarm threshold value is: finish and separate the SR that CAZAC conciliates orthogonal spectrum expansion, and go out the noise power of signal power and SR place RB at the channel estimating of the SR at each UE place, thereby calculate the DTX signal to noise ratio (snr), and then according to l-G simulation test, draw SR false-alarm threshold value, the also i.e. probability of this false-alarm threshold value correspondence.
Detect the process of SR false-alarm and carry out in the present embodiment always, in the process of duplicate detection, false-alarm of every output, then statistical value adds up once.In the process of implementation, can be preferentially to carry out false-alarm to detect, and the thresholding adjustment be to handle according to the thresholding adjustment that the result that false-alarm detects does.
Certainly, also need certain fundamental conditions just can detect SR, if namely detect forward SR in the cycle of current subframe SR, then carry out the SR false-alarm and detect.This step is prerequisite, if do not detect forward SR on the cycle of current subframe SR, does not then detect.For example, under the situation about arriving in the cycle of the SR of current subframe indication UE, do not need to carry out the SR false-alarm and detect.
Detect in the process of SR false-alarm at needs, may run into multiple situation, below based on above-mentioned CQI channel with reply under the situation that ack channel all exists and be introduced, comprise following four kinds of testing processes:
First kind: current subframe is the cycle of SR, and arrive reply ACK feedback constantly, but cycle of no show channel quality indicator (CQI), then relatively the DTX signal to noise ratio on the ACK code channel whether greater than the DTX signal to noise ratio on the SR channel, if confirm that then SR is false-alarm;
Second kind: current subframe is the cycle of SR, and arrives the cycle of CQI, the feedback of no show ACK constantly, then relatively the signal to noise ratio on the CQI channel whether greater than the DTX signal to noise ratio on the SR channel, if confirm that then SR is false-alarm;
The third: current subframe is the cycle of SR, and the feedback that arrives cycle of CQI and ACK constantly, allows CQI and ACK to pass simultaneously simultaneously, then relatively the signal to noise ratio on the CQI channel whether greater than the DTX signal to noise ratio on the SR channel, if determine that then SR is false-alarm;
The 4th kind: current subframe is the cycle of SR, and arrive the feedback of cycle of CQI and ACK constantly, do not allow CQI and ACK to pass simultaneously simultaneously, then relatively the DTX signal to noise ratio on the ACK code channel whether greater than the DTX signal to noise ratio on the SR channel, if determine that then SR is false-alarm; If not, then relatively the signal to noise ratio on the CQI channel whether greater than the DTX signal to noise ratio on the SR channel, if determine that then SR is false-alarm.
In the process of execution in step S106, process according to the default SR false-alarm threshold value of SR false alarm probability adjustment can comprise following processing: judge whether the SR false alarm probability is adjusted between the corresponding false alarm probability of level at default thresholding, wherein, default thresholding adjustment level is made of first threshold value and second threshold value, and first threshold value is less than second threshold value, and wherein first threshold value is default SR false-alarm threshold value; If then between first threshold value and second threshold value, press the default SR false-alarm threshold value of default step-length adjustment; When adjusting the default adjustment of number of times arrival number of times, stop to adjust default SR false-alarm threshold value.If the SR false alarm probability is adjusted grade number of times of second threshold value correspondence probability greater than preset times greater than default thresholding, then enter next thresholding adjustment level and adjust.
In the process of implementing, at first the base station arranges a thresholding as required and adjusts level, and a thresholding adjustment level can be made of a low threshold and a high threshold, the corresponding false alarm probability of each thresholding, and the base station is adjusted at a thresholding at every turn and adjusts within the level.Above-mentioned default thresholding adjustment level is thresholding and adjusts level, and is corresponding, the low threshold of first threshold value for arranging, the high threshold of second threshold value for arranging.In the specific implementation, initial threshold value that can system is set to the minimum threshold of system, also is about to the minimum threshold that default SR false-alarm threshold value is set to system.
And then, the base station is at the SR detection case of all UE, estimate out a false alarm probability, and judge whether this false alarm probability drops on thresholding and adjust between the corresponding false alarm probability of level, if drop between it, illustrates that the thresholding of present system arranged low, need in current usage threshold level, adjust a step-length in the basis of low threshold, repeat this process then, when the adjustment number of times arrives default number of times, then stop to adjust.
If estimate false alarm probability repeatedly greater than the false alarm probability of high threshold correspondence in this grade thresholding, then need to skip at the corresponding levels the adjustment and carry out the next stage adjustment.It is also identical with this thresholding adjustment level that the next stage thresholding is adjusted level, and a low threshold and a high threshold are arranged, and just adjusts in the level at the next stage thresholding, and this low threshold is not initial threshold, and only is a threshold value.
In concrete implementation, the statistics of the setting of initialization thresholding, false-alarm number of times etc. can be summed up at thresholding and adjust in this process, and the whole process to the thresholding scheduling is described further below, and principle is as follows:
(1) initialization thresholding adjusting module parameter.The initialization thresholding is adjusted progression.Suppose that it is L that thresholding is adjusted progression, then need initialized thresholding number K=L+1, then need default K initialization thresholding and corresponding false alarm probability value.The initialization thresholding is arranged Thesh (0) successively from low to high, Thesh (1) ... Thesh (K-1), corresponding false alarm probability is arranged as P (0) from high to low, P (1) ... P (K-1), Thesh (i) and P (i) are respectively the emulation test of many times and obtain.If the maximum times A that adjusts between the two-stage thresholding, each times N that needs statistics of adjusting.False alarm probability is estimated in setting need skip greater than the false alarm probability of high threshold correspondence in this grade thresholding that at the corresponding levels to adjust the maximum times of carrying out the next stage adjustment be S, and S is smaller or equal to A.
Calculate the thresholding step factor Thesh_Adj_Factor (i) of every grade of adjustment, Thesh_Adj_Factor (i)=(Thesh (i)-Thesh (i-1))/A, i=1,2 ... L.Current thresholding Cur_Thesh initialization value is Thesh (0).Progression i=1 is adjusted in initialization, and it is 0 that counter Adj_Counter is adjusted in initialization, and it is 0 greater than the interval counter S_Counter of the false alarm probability of this grade thresholding correspondence that false alarm probability is estimated in initialization.
(2) the DTX signal to noise ratio of calculating SR.SR of the every detection of UE just statistics once, if the DTX signal to noise ratio of the SR of UE is positioned between thresholding Thesh (i-1) and the Thesh (i), and this time false-alarm correction result is output as non-false-alarm, then needs this situation is added up; Repeat this process, count to up to the detection overall budget of SR and reach the number of times that each adjustment need be added up.
(3) estimate false alarm probability.To be positioned at bag number between Thesh (i-1) and Thesh (i) thresholding divided by total statistical packages number, the false alarm probability Pre that obtains estimating (i).
(4) adjust thresholding.If estimate false alarm probability Pre (i) between the false alarm probability P (i-1) and P (i) of Thesh (i-1) and Thesh (i) thresholding correspondence, it is low to illustrate that then current thresholding arranged, need to adjust thresholding, adjusting time counter Adj_Counter increases once, needs to carry out following adjustment simultaneously:
Thesh(i-1)＝Thesh(i-1)+Thesh_Adj_Factor(i)×Adj_Counter；Cur_Thesh＝Thesh(i-1)；
P (i-1)=Pre (i); SR detection counter Det_Counter clear 0; SR false-alarm counter FalseAlarm_Counter clear 0; If estimate false alarm probability Pre (i) greater than the corresponding false alarm probability P (i) of Thesh (i), then S Counter counter increases by 1.
(5) if S_Counter, then finishes thresholding adjustment at the corresponding levels greater than S, adjusting progression i, to increase by 1, Adj_Counter clear 0, and S_Counter is clear 0, jumps to (7), otherwise carries out (6);
(6) judge to adjust Counter Value Adj_Counter and whether arrive the maximum number of times A that adjusts, if arrive then this grade thresholding is just no longer adjusted, enter the adjustment of next stage thresholding, adjusting progression i increases once, and Adj_Counter is clear 0, and S_Counter clear 0; If do not arrive, then repeat (2) to (5) process.
(7) judge whether adjust progression i arrives L time, if arrive, then stop to adjust, if no show still then repeats the process of (2) to (6).
The method of the reduction SR false alarm probability that the present invention proposes has reduced because the base station that the SR false-alarm causes is judged the probability of UE behavior by accident, thereby has saved scheduling overhead.Under some scene, do such as UE and to download when uploading business, reduce the SR false-alarm and can also improve demodulation performance, promote downlink traffic.
Preferred embodiment
As shown in Figure 2, it is as follows that SR is carried out the flow process that false-alarm detects, and comprises that step S202 is to step S220:
Step S202, the SR false-alarm calibration mark of initialization current UE.
Step S204 judges whether UE is forward SR at the SR of current time testing result SR_DTX_Flag, if, execution in step S206 then, otherwise jump to step S220.
Step S206 judges whether CQI cycle of UE and ACK feedback arrives constantly simultaneously, if, execution in step S208 then, otherwise execution in step S210.
Step S208 judges whether current UE allows CQI and ACK to transmit simultaneously, if, execution in step S214 then, if not, execution in step S218 then.
Step S210 judges whether that the ACK feedback arrives and the not arrival of CQI cycle constantly.If if execution in step S212 then is otherwise execution in step S214.
Step S212, relatively the DTX signal to noise ratio on the SR channel and the signal to noise ratio on the ACK code channel.If the DTX signal to noise ratio on the ACK code channel surpasses DTX signal to noise ratio default thresholding, then execution in step S216 on the SR channel.If the DTX signal to noise ratio on the ACK code channel does not surpass DTX signal to noise ratio default thresholding, then execution in step S220 on the SR channel.
Step S214, DTX signal to noise ratio on the comparison SR channel and the signal to noise ratio on the CQI code channel, if the signal to noise ratio on the CQI code channel surpasses the default thresholding of DTX signal to noise ratio on the SR channel, execution in step S216 then, if the signal to noise ratio on the CQI code channel does not surpass DTX signal to noise ratio default thresholding, then execution in step S220 on the SR channel.
Step S216 determines that SR is false-alarm.
Step S218, relatively the DTX signal to noise ratio on the SR channel and the signal to noise ratio on the ACK code channel.If the DTX signal to noise ratio on the ACK code channel surpasses DTX signal to noise ratio default thresholding, then execution in step S216 on the SR channel.If the DTX signal to noise ratio on the ACK code channel does not surpass DTX signal to noise ratio default thresholding, then execution in step S214 on the SR channel.
Step S220, false-alarm detects and finishes, output SR false-alarm testing result.
Fig. 3 adjusts process chart to the SR thresholding, comprises that step S302 is to step S318:
Step S302, the system parameters initialization.Det_Counter=0, expression SR detection counter is initialized as 0; FalseAlarm_Counter=0, expression false-alarm counter is initialized as 0; Adj_Counter=0, expression is adjusted time counter and is initialized as 0; S_Counter=0, expression is estimated false alarm probability and is initialized as 0 greater than the false alarm probability counter of high threshold correspondence in this grade thresholding.It is L that thresholding is adjusted progression, initialization thresholding number K=L+1.
Initialization thresholdings at different levels are arranged from low to high and are followed successively by: Thesh (0), Thesh (1) ... Thesh (K-1).
Corresponding false alarm probability is arranged from high to low and is followed successively by: P (0), and P (1) ... P (K-1).
If the maximum times A that adjusts between the two-stage thresholding, each detection SR times N that needs statistics of adjusting.
Setting is estimated false alarm probability greater than the maximum times S of the false alarm probability of high threshold correspondence in this grade thresholding, and S is smaller or equal to A, if estimate false alarm probability at the corresponding levels the adjustment greater than the false alarm probability of high threshold correspondence in this grade thresholding S time, then needs to carry out the next stage adjustment.
Current DTX decision threshold Cur_Thesh=Thesh (0); Progression i=1 is adjusted in initialization, and expression is from beginning adjustment between first order thresholding Thesh (0) and the Thesh (1).
Step S304 calculates each thresholding level and adjusts step factor.Calculate current i level thresholding and adjust step factor Thesh_Adj_Factor (i).
Thesh_Adj_Factor (i)=(Thesh (i)-Thesh (i-1))/A, the threshold value that the adjustment of expression i level thresholding need be raised.
Step S306 calculates the DTX signal to noise ratio SR_DTX_SNR of current subframe SR code channel.
Step S308, SR detection counter counting.On the SR sense cycle every detection once, the increase of SR detection counter once, Det_Counter increases by 1.
Step S310, whether the DTX signal to noise ratio of judging SR is adjusted between the threshold value and this time false-alarm testing result is output as non-false-alarm in the corresponding levels.If the DTX signal to noise ratio SR_DTX_SNR of SR is between threshold T hesh (i-1) and Thesh (i), and this time false-alarm testing result is output as non-false-alarm, execution in step S312 then, otherwise, continue execution in step S306.
Step S312, SR false-alarm counter (FalseAlarm_Counter) increases by 1.
Step S314 judges whether the SR detection counter reaches default N time.If, execution in step S316 then, otherwise, execution in step S306 continued.
Step S316 estimates false alarm probability.Estimate false alarm probability Pre (i)=FalseAlarm_Counter/N * 100%.
Step S318 judges whether estimate false alarm probability adjusts between the probability at thresholding at the corresponding levels.If, execution in step S320 then, otherwise execution in step S322.
Step S320 adjusts threshold value.Namely adjust the counter increase once, SR detects the counting zero clearing, the counter O reset of SR false-alarm, and the current preset thresholding is updated to the low threshold after the adjustment, and the corresponding empty probability of this thresholding level low threshold is updated to estimates false alarm probability.
Because it is low that current thresholding arranged, so need to adjust thresholding, specifically arrange as follows: adjusting time counter Adj_Counter increases once, simultaneously, and Thesh (i-1)=Cur_Thesh+Thesh_Adj_Factor (i) * Adj_Counter; Cur_Thesh=Thesh (i-1); P (i-1)=Pre (i); SR detection counter Det_Counter is clear 0, SR false-alarm counter FalseAlarm_Counter clear 0.
Step S322 judges and to estimate false alarm probability whether greater than the false alarm probability of high threshold correspondence.If, execution in step S324 then, otherwise, execution in step S326.
Step S324 estimates false alarm probability and adds 1 greater than the false alarm probability counter of high threshold correspondence in this grade thresholding.Namely estimate false alarm probability Pre (i) greater than the corresponding false alarm probability P (i) of Thesh (i), the S_Counter counter increases by 1.
Step S326 judges whether estimate false alarm probability reaches preset times greater than the false alarm probability counter of high threshold correspondence in this grade thresholding.If, execution in step S328 then, otherwise execution in step S330.
Step S328 finishes the adjustment of this thresholding level.If namely S_Counter is greater than S, then finish thresholding adjustment at the corresponding levels, adjusting progression i, to increase by 1, Adj_Counter clear 0, and S_Counter clear 0.
Step S330 judges whether adjust time counter reaches preset times A.If, execution in step S332 then, otherwise execution in step S306.
Step S332 enters next thresholding level adjustment.Namely adjusting progression i, to increase by 1, Adj_Counter clear 0, and S_Counter clear 0.
Step S334 judges whether adjust progression reaches preset times.If, execution in step S336 then, otherwise execution in step S306.
Step S336, process ends.Adjust progression i arrival L time if namely arrive, then stop to adjust.
The embodiment of the invention also provides a kind of device of the SR of adjustment false-alarm threshold value, as shown in Figure 4, comprising: statistical module 10 is used for statistics at the default number of times that detects the SR false-alarm in the number of times that detects; Computing module 20 with statistical module 10 couplings, is used for calculating the SR false alarm probability according to the number of times of detected SR false-alarm; Adjusting module 30 with computing module 20 couplings, is used for the SR false-alarm threshold value default according to the adjustment of SR false alarm probability.
Wherein, statistical module 10 can also comprise judging unit 102 and confirmation unit 104 as shown in Figure 5, and wherein, judging unit 102 is used for judging that whether signal to noise ratio on other control channel of the current subframe of UE is greater than the discontinuous transmitting DTX signal to noise ratio on the SR channel; Confirmation unit 104, with judging unit 102 couplings, be used under the situation of the signal to noise ratio on other control channel of the current subframe of UE greater than the discontinuous transmitting DTX signal to noise ratio on the SR channel, confirming to detect the SR false-alarm, wherein, the DTX signal to noise ratio on the SR channel is SR false-alarm threshold value.
In a preferred implementation, device can also comprise Executive Module shown in Figure 6 40, with statistical module 10 couplings, is used for detecting under the situation of forward SR in the cycle of current subframe SR, carries out the SR false-alarm and detects.
As can be seen from the above description, the present invention has realized following technique effect:
The above embodiment of the present invention detects by SR being carried out false-alarm, and the probability of statistics false-alarm detection in total detection number of times, utilize this probability to adjust threshold value, solved in the correlation technique, there is not a kind of method that can adjust this fixed gate limit value, make that false-alarm often takes place under the fixed gate limit value, cause the problem of resource waste, and then can adjust thresholding in real time, reduce the SR false alarm probability, improve systematic function, promote downlink traffic.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method of adjusting dispatch request SR false-alarm threshold value is characterized in that, comprising:
Statistics is at the default number of times that detects the SR false-alarm in the number of times that detects;
Number of times according to detected described SR false-alarm calculates the SR false alarm probability;
The SR false-alarm threshold value default according to the adjustment of described SR false alarm probability.
2. method according to claim 1 is characterized in that, detects described SR false-alarm and comprises:
Whether judge signal to noise ratio on other control channel of the current subframe of UE greater than the discontinuous transmitting DTX signal to noise ratio on the SR channel, if, then confirm to detect the SR false-alarm, wherein, the DTX signal to noise ratio on the described SR channel is described SR false-alarm threshold value.
3. method according to claim 2 is characterized in that, other control channel comprises: channel quality indicator (CQI) channel and/or reply ack channel.
4. method according to claim 3 is characterized in that, before detecting described SR false-alarm, also comprises:
If detect forward SR in the cycle of current subframe SR, then carry out described SR false-alarm and detect.
5. according to each described method in the claim 1 to 4, it is characterized in that, detect described SR false-alarm and comprise one of following:
Current subframe is the cycle of SR, and arrive reply ACK feedback constantly, but cycle of no show channel quality indicator (CQI), then relatively the DTX signal to noise ratio on the ACK code channel whether greater than the DTX signal to noise ratio on the described SR channel, if confirm that then described SR is false-alarm;
Current subframe is the cycle of SR, and arrives the cycle of CQI, the feedback of no show ACK constantly, then relatively the signal to noise ratio on the CQI channel whether greater than the DTX signal to noise ratio on the described SR channel, if confirm that then described SR is false-alarm;
Current subframe is the cycle of SR, and the feedback that arrives cycle of CQI and ACK is constantly, allows CQI and ACK to pass simultaneously simultaneously, then relatively the signal to noise ratio on the CQI channel whether greater than the DTX signal to noise ratio on the described SR channel, if determine that then described SR is false-alarm;
Current subframe is the cycle of SR, and arrive the feedback of cycle of CQI and ACK constantly, do not allow CQI and ACK to pass simultaneously simultaneously, then relatively the DTX signal to noise ratio on the ACK code channel whether greater than the DTX signal to noise ratio on the described SR channel, if determine that then described SR is false-alarm; If not, then relatively the signal to noise ratio on the CQI channel whether greater than the DTX signal to noise ratio on the described SR channel, if determine that then described SR is false-alarm.
6. method according to claim 5 is characterized in that, the SR false-alarm threshold value default according to the adjustment of described SR false alarm probability comprises:
Judge whether described SR false alarm probability is adjusted between the corresponding false alarm probability of level at default thresholding, wherein, described default thresholding adjustment level is made of first threshold value and second threshold value, and first threshold value is less than second threshold value, and wherein said first threshold value is described default SR false-alarm threshold value;
If then between described first threshold value and second threshold value, adjust described default SR false-alarm threshold value by default step-length;
When adjusting the default adjustment of number of times arrival number of times, stop to adjust described default SR false-alarm threshold value.
7. method according to claim 6 is characterized in that, the SR false-alarm threshold value default according to the adjustment of described SR false alarm probability comprises:
If described SR false alarm probability is adjusted grade number of times of second threshold value correspondence probability greater than preset times greater than described default thresholding, then enter next thresholding adjustment level and adjust.
8. a device of adjusting dispatch request SR false-alarm threshold value is characterized in that, comprising:
Statistical module is used for statistics at the default number of times that detects the SR false-alarm in the number of times that detects;
Computing module is used for calculating the SR false alarm probability according to the number of times of detected described SR false-alarm;
Adjusting module is used for the SR false-alarm threshold value default according to the adjustment of described SR false alarm probability.
9. device according to claim 8 is characterized in that, described statistical module comprises:
Judging unit is used for judging that whether signal to noise ratio on other control channel of the current subframe of UE is greater than the discontinuous transmitting DTX signal to noise ratio on the SR channel;
Confirmation unit is used under the situation of the signal to noise ratio on other control channel of the current subframe of UE greater than the discontinuous transmitting DTX signal to noise ratio on the SR channel, confirms to detect the SR false-alarm, and wherein, the DTX signal to noise ratio on the described SR channel is described SR false-alarm threshold value.
10. device according to claim 9 is characterized in that, described device also comprises:
Executive Module is used for detecting under the situation of forward SR in the cycle of current subframe SR, carries out described SR false-alarm and detects.
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