CN103297999A - Scheduling request false-alarm threshold value adjusting method and device - Google Patents

Abstract

The invention discloses a method and device for adjusting the threshold value of SR false alarms. The method includes: counting the number of SR false alarms detected within the preset detection times; Alarm probability; adjust the preset SR false alarm threshold according to the SR false alarm probability. By using the present invention, there is no method in the related art that can adjust the fixed threshold value, so that under the fixed threshold value, false alarms often occur, resulting in waste of system resources, and then the threshold can be adjusted in real time, Reduce the probability of SR false alarms, improve system performance, and increase downlink traffic.

Description

Method and device for adjusting dispatch request false alarm threshold

technical field

The present invention relates to the communication field, in particular to a method and device for adjusting a scheduling request (Scheduling request, SR for short) false alarm threshold.

Background technique

In the Long Term Evolution (referred to as LTE) system, the user equipment (User Equipment, referred to as UE) uses the physical uplink control channel (referred to as PUCCH) to the evolved base station (Evolved Node B, referred to as eNodeB) sends uplink control information. PUCCH supports multiple formats. For example, format 1 can be set for UE to send SR to eNodeB; format 1a is used for UE to send 1-bit Hybrid Automatic Repeat reQuest (HARQ for short) to eNodeB. Acknowledgment (ACK for short) or Non-Acknowledge (NACK for short) information; format 1b, used for UE to send 2-bit HARQ ACK or NACK to eNodeB. For formats 2, 2a, and 2b, the UE sends a Channel Quality Indicator (CQI for short) and HARQ ACK or NACK information to the eNodeB.

The uplink control channel is a code division channel. The control information of different UEs can be multiplexed in the same time-frequency resource block (Resource Block, RB for short). Since the control information carries relatively few bits, the multiplexing of control information between different UEs is through This is achieved using different cyclic shifts and/or orthogonal spreading sequences. The control information adopts the above-mentioned frequency-domain code division multiplexing (cyclic shift) and time-domain code division multiplexing (orthogonal spread spectrum sequence) multiplexing method, so that the system can effectively support the transmission of control information for multiple users and small payloads , and improve the working ability of the system in the case of low signal-to-noise ratio.

Format 1 is used for the UE to send an SR to the eNodeB. The user applies for uplink data transmission resources. When the UE has uplink data to send, it will send a positive SR at the SR period and subframe offset configured by the base station. Although the UE does not send SR every cycle and subframe offset, the base station must detect every SR cycle and offset subframe to avoid missed detection. For this reason, SR false alarms are inevitably introduced. question. The so-called false alarm means that the base station side detects a signal when the UE does not send anything.

Once the SR false alarm, it will have a great impact on the system: on the one hand, it will increase the scheduling overhead; on the other hand, when the UE is working in the power saving mode, the base station will mistakenly think that the UE needs to be activated for business because of the false alarm of the SR. ;Furthermore, in some scenarios, SR false alarm will also cause downlink ACK feedback information parsing error, for example, downlink download service, uplink control channel PUCCH needs to feed back ACK information of downlink traffic channel, if SR and ACK are in the same If it needs to be sent at all times, the false alarm of SR causes the base station to mistakenly believe that SR and ACK are multiplexed, resulting in ACK parsing error, which affects the downlink traffic. The SR detection process of the LTE uplink control channel receiver generally requires deconstant envelope zero autocorrelation sequence (CAZAC) first, then deorthogonal spread spectrum, and finally discontinuous transmission (Discontinuous Transmission, DTX for short) judgment. Usually, a DTX judgment threshold that satisfies the SR under a given false alarm probability can be obtained through multiple test simulations and analysis, but this fixed threshold judgment often does not have universal applicability. In the related art, there is no method for adjusting the fixed threshold value, so that under the fixed threshold value, false alarms often occur, resulting in waste of system resources.

Contents of the invention

The present invention provides a method and device for adjusting the threshold value of SR false alarms, so as to at least solve the problem that in related technologies, there is no method capable of adjusting the fixed threshold value, so that under the fixed threshold value, false alarms often occur , causing a waste of system resources.

According to one aspect of the present invention, a method for adjusting the SR false alarm threshold value is provided, including: counting the number of SR false alarms detected within the preset detection times; calculating according to the number of detected SR false alarms SR false alarm probability; adjust a preset SR false alarm threshold according to the SR false alarm probability.

Preferably, detecting the SR false alarm includes: judging whether the signal-to-noise ratio on other control channels of the current subframe of the UE is greater than the discontinuous transmission DTX signal-to-noise ratio on the SR channel, and if so, confirming that the SR false alarm is detected, Wherein, the DTX signal-to-noise ratio on the SR channel is the SR false alarm threshold.

Preferably, other control channels include: a channel quality indicator CQI channel and/or an acknowledgment ACK channel.

Preferably, before detecting the SR false alarm, the method further includes: if a forward SR is detected in the period of the current subframe SR, performing the SR false alarm detection.

Preferably, detecting the SR false alarm includes one of the following: the current subframe is the period of SR, and the feedback time of acknowledgment ACK is reached, but the period of channel quality indicator CQI is not reached, then the DTX signal-to-noise ratio on the ACK code channel is compared Whether it is greater than the DTX signal-to-noise ratio on the SR channel, if yes, confirm that the SR is a false alarm; the current subframe is the period of the SR, and reaches the period of the CQI, and does not reach the feedback time of the ACK, then compare the CQI channel Whether the signal-to-noise ratio on the SR channel is greater than the DTX signal-to-noise ratio on the SR channel, if yes, confirm that the SR is a false alarm; the current subframe is the period of the SR, and it reaches the period of the CQI and the feedback time of the ACK, and at the same time Allowing CQI and ACK to be transmitted at the same time, then compare whether the signal-to-noise ratio on the CQI channel is greater than the DTX signal-to-noise ratio on the SR channel, and if so, determine that the SR is a false alarm; the current subframe is the period of the SR, and When the cycle of CQI and the feedback time of ACK are reached, and CQI and ACK are not allowed to be transmitted at the same time, then compare whether the DTX signal-to-noise ratio on the ACK code channel is greater than the DTX signal-to-noise ratio on the SR channel, and if so, determine the SR is a false alarm; if not, compare whether the signal-to-noise ratio on the CQI channel is greater than the DTX signal-to-noise ratio on the SR channel, and if so, determine that the SR is a false alarm.

Preferably, adjusting the preset SR false alarm threshold according to the SR false alarm probability includes: judging whether the SR false alarm probability is between the false alarm probabilities corresponding to the preset threshold adjustment levels, wherein the preset The threshold adjustment stage is composed of a first threshold value and a second threshold value, and the first threshold value is smaller than the second threshold value, wherein the first threshold value is the preset SR false alarm threshold value ; If yes, adjust the preset SR false alarm threshold value between the first threshold value and the second threshold value according to the preset step size; when the number of adjustments reaches the preset number of adjustments, stop Adjusting the preset SR false alarm threshold.

Preferably, adjusting the preset SR false alarm threshold according to the SR false alarm probability includes: if the SR false alarm probability is greater than the number of times corresponding to the second threshold value of the preset threshold adjustment level greater than the preset number of times , enter the next threshold adjustment stage for adjustment.

According to another aspect of the present invention, a device for adjusting the SR false alarm threshold is provided, including: a statistics module, used to count the number of times SR false alarms are detected within the preset detection times; a calculation module, used to calculate according to The SR false alarm probability is calculated by the number of detected SR false alarms; an adjustment module is configured to adjust a preset SR false alarm threshold according to the SR false alarm probability.

Preferably, the statistical module includes: a judging unit, used to judge whether the signal-to-noise ratio on other control channels of the current subframe of the UE is greater than the discontinuous transmission DTX signal-to-noise ratio on the SR channel; When the signal-to-noise ratio on other control channels of the subframe is greater than the discontinuous transmission DTX signal-to-noise ratio on the SR channel, it is confirmed that an SR false alarm is detected, wherein the DTX signal-to-noise ratio on the SR channel is the SR False alarm threshold.

Preferably, the device further includes: an executing module, configured to execute the SR false alarm detection when a forward SR is detected in the period of the current subframe SR.

The present invention adopts the following methods: counting the number of SR false alarms detected within the preset detection times; calculating the SR false alarm probability according to the detected number of SR false alarms; adjusting the preset SR false alarm according to the SR false alarm probability Threshold value, that is, perform false alarm detection on SR, and count the probability of false alarm detection in the total number of detections, use this probability to adjust the threshold value, and solve the problem that there is no one that can adjust the fixed threshold value in related technologies The method makes false alarms frequently occur under a fixed threshold value, resulting in waste of system resources, and then the threshold can be adjusted in real time to reduce the probability of SR false alarms, improve system performance, and increase downlink traffic.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

1 is a flowchart of a method for adjusting an SR false alarm threshold according to an embodiment of the present invention;

Fig. 2 is a flow chart of the SR false alarm detection method according to a preferred embodiment of the present invention;

Fig. 3 is a flowchart of a method for adjusting an SR threshold value according to a preferred embodiment of the present invention;

FIG. 4 is a structural block diagram 1 of a device for adjusting an SR false alarm threshold according to an embodiment of the present invention;

Fig. 5 is a structural block diagram 2 of a device for adjusting an SR false alarm threshold according to an embodiment of the present invention;

FIG. 6 is a third structural block diagram of an apparatus for adjusting an SR false alarm threshold according to an embodiment of the present invention.

Detailed ways

Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

In the LTE system, the false alarm of the SR will cause the base station to misjudge the behavior of the UE, resulting in additional scheduling overhead, and in some scenarios, it will also affect the downlink traffic. Based on the above situation, the embodiment of the present invention provides a method for adjusting the SR false alarm threshold, as shown in Figure 1, the method includes steps S102 to S106:

Step S102, counting the number of SR false alarms detected within the preset detection times;

Step S104, calculating the SR false alarm probability according to the number of detected SR false alarms;

Step S106, adjusting a preset SR false alarm threshold according to the SR false alarm probability.

The embodiment of the present invention adopts the following method: count the number of SR false alarms detected within the preset detection times; calculate the SR false alarm probability according to the detected number of SR false alarms; adjust the preset SR false alarm probability according to the SR false alarm probability False alarm threshold value, that is, perform false alarm detection on SR, and count the probability of false alarm detection in the total number of detections, use this probability to adjust the threshold value, solve the problem that none of the related technologies can adjust the fixed threshold The value method makes false alarms often occur under a fixed threshold value, resulting in a waste of system resources, and then the threshold can be adjusted in real time to reduce the probability of SR false alarms, improve system performance, and increase downlink traffic.

In the process of executing step S102, it is necessary to detect SR false alarms. This process may include the following processing: judging whether the signal-to-noise ratio on other control channels of the current subframe of the UE is greater than the discontinuous transmission DTX signal-to-noise ratio on the SR channel, if If yes, it is confirmed that an SR false alarm is detected, wherein the DTX signal-to-noise ratio on the SR channel is the SR false alarm threshold. Wherein, other control channels may include a channel quality indicator CQI channel or an acknowledgment ACK channel, or a combination of the two channels.

In the implementation process, the SR false alarm threshold value has its preset conditions, that is, the process of obtaining the SR false alarm threshold value is: complete the SR de-CAZAC and de-orthogonal spread spectrum, and for the channel of the SR where each UE is located The signal power and the noise power of the RB where the SR is located are estimated to calculate the DTX signal-to-noise ratio (SNR), and then according to the simulation test, the SR false alarm threshold is obtained, that is, the probability corresponding to the false alarm threshold.

The process of detecting SR false alarms is carried out continuously in this embodiment. In the process of repeated detection, each time a false alarm is output, the statistical value is accumulated once. During the execution process, the false alarm detection may be performed preferentially, and the threshold adjustment is performed according to the result of the false alarm detection.

Of course, certain basic conditions are also required before the SR can be detected, that is, if a positive SR is detected in the period of the current subframe SR, SR false alarm detection is performed. This step is a prerequisite, if no forward SR is detected in the period of the current subframe SR, no detection is performed. For example, in the case that the current subframe indicates that the UE's SR period arrives, no SR false alarm detection is required.

In the process of detecting SR false alarms, many situations may be encountered. The following is an introduction based on the above-mentioned CQI channel and response ACK channel, including the following four detection processes:

The first one: the current subframe is the period of SR, and the feedback time of ACK is reached, but the period of channel quality indication CQI is not reached, then compare whether the DTX signal-to-noise ratio on the ACK code channel is greater than the DTX signal-to-noise ratio on the SR channel , if yes, confirm that the SR is a false alarm;

The second type: the current subframe is the period of SR, and it reaches the period of CQI, and the feedback time of ACK is not reached, then compare whether the signal-to-noise ratio on the CQI channel is greater than the DTX signal-to-noise ratio on the SR channel, and if so, confirm SR is a false alarm;

The third type: the current subframe is the period of SR, and the period of CQI and the feedback time of ACK are reached, and the CQI and ACK are allowed to be transmitted at the same time, then compare whether the SNR on the CQI channel is greater than the DTX SNR on the SR channel , if yes, determine that the SR is a false alarm;

The fourth type: the current subframe is the period of SR, and the period of CQI and the feedback time of ACK are reached, and CQI and ACK are not allowed to be transmitted at the same time, then compare whether the DTX signal-to-noise ratio on the ACK code channel is greater than the DTX signal-to-noise ratio on the SR channel Noise ratio, if yes, then determine that SR is a false alarm; if not, compare whether the signal-to-noise ratio on the CQI channel is greater than the DTX signal-to-noise ratio on the SR channel, if yes, then determine that the SR is a false alarm.

In the process of executing step S106, the process of adjusting the preset SR false alarm threshold according to the SR false alarm probability may include the following processing: judging whether the SR false alarm probability is between the false alarm probabilities corresponding to the preset threshold adjustment level, Wherein, the preset threshold adjustment stage is composed of a first threshold value and a second threshold value, and the first threshold value is smaller than the second threshold value, wherein the first threshold value is a preset SR false alarm threshold value ; If it is, then adjust the preset SR false alarm threshold value according to the preset step size between the first threshold value and the second threshold value; when the adjustment times reach the preset adjustment times, stop adjusting the preset SR false alarm threshold. If the SR false alarm probability is greater than the probability corresponding to the second threshold value of the preset threshold adjustment stage for more than the preset number of times, enter the next threshold adjustment stage for adjustment.

In the process of implementation, firstly, the base station sets a threshold adjustment level as required. A threshold adjustment level can be composed of a low threshold and a high threshold. Each threshold corresponds to a false alarm probability. Inside. The aforementioned preset threshold adjustment level is the threshold adjustment level. Correspondingly, the first threshold value is the set low threshold, and the second threshold value is the set high threshold. During specific implementation, the initial threshold value of the system may be set as the lowest threshold value of the system, that is, the preset SR false alarm threshold value may be set as the lowest threshold value of the system.

Furthermore, the base station estimates a false alarm probability based on the SR detection conditions of all UEs, and determines whether the false alarm probability falls between the false alarm probabilities corresponding to the threshold adjustment level. If it falls between them, it means that the current system If the threshold is set too low, it is necessary to adjust a step size based on the low threshold of the currently used threshold level, and then repeat this process. When the number of adjustments reaches the preset number of times, the adjustment will stop.

If the estimated false alarm probability is higher than the false alarm probability corresponding to the upper threshold of the level threshold for many times, you need to skip this level of adjustment and proceed to the next level of adjustment. The next threshold adjustment stage is also the same as the threshold adjustment stage, having a low threshold and a high threshold, except that in the next threshold adjustment stage, the low threshold is not the initial threshold, but only a threshold value.

In the specific execution process, the setting of the initialization threshold and the statistics of the number of false alarms can all be attributed to the process of threshold adjustment. The whole process of threshold scheduling is further described below. The principle is as follows:

(1) Initialize the parameters of the threshold adjustment module. Initialize threshold adjustment levels. Assuming that the number of threshold adjustment stages is L, the number of thresholds to be initialized is K=L+1, and K initialization thresholds and corresponding false alarm probability values need to be preset. The initialization thresholds are arranged from low to high in order Thesh(0), Thesh(1)...Thesh(K-1), and the corresponding false alarm probabilities are arranged from high to low as P(0), P(1),...P (K-1), Thesh(i) and P(i) are obtained by simulating multiple experiments respectively. Set the maximum number of adjustments A between the two levels of thresholds, and the number of times N that needs to be counted for each adjustment. Set the maximum number of times that the estimated false alarm probability is greater than the false alarm probability corresponding to the high threshold of the level threshold and need to skip this level of adjustment to the next level of adjustment is S, and S is less than or equal to A.

Calculate the adjusted threshold step factor Thesh_Adj_Factor(i) for each stage, Thesh_Adj_Factor(i)=(Thesh(i)-Thesh(i-1))/A, i=1, 2,...L. The initial value of the current threshold Cur_Thesh is Thesh(0). Initialize the number of adjustment stages i=1, initialize the adjustment counter Adj_Counter to 0, initialize the false alarm probability interval counter S_Counter corresponding to the estimated false alarm probability greater than the threshold of the level to 0.

(2) Calculate the DTX signal-to-noise ratio of the SR. The UE counts every time it detects an SR. If the DTX SNR of the UE's SR is between the threshold Thesh(i-1) and Thesh(i), and the output of the false alarm correction result is a non-false alarm, you need to This situation is counted; repeat this process until the total number of packets detected by the SR reaches the number of counts that need to be counted for each adjustment.

(3) Estimate the probability of false alarm. Divide the number of packets between the threshold of Thesh(i-1) and Thesh(i) by the total number of statistical packets to obtain the estimated false alarm probability Pre(i).

(4) Adjust the threshold. If the estimated false alarm probability Pre(i) is between the false alarm probability P(i-1) and P(i) corresponding to Thesh(i-1) and Thesh(i) thresholds, it means that the current threshold setting is too low, The threshold needs to be adjusted, and the adjustment times counter Adj_Counter is increased once, and the following adjustments need to be made at the same time:

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 is cleared to 0; SR false alarm counter FalseAlarm_Counter is cleared to 0; if the estimated false alarm probability Pre(i) is greater than the corresponding false alarm probability P(i) of Thesh(i) ), then the S Counter counter increases by 1.

(5) If S_Counter is greater than S, then end the threshold adjustment of this stage, increase the number of adjustment stages i by 1, clear Adj_Counter to 0, clear S_Counter to 0, skip to (7), otherwise proceed to (6);

(6) Determine whether the adjustment counter value Adj_Counter has reached the maximum number of adjustment times A, if it reaches the threshold of this level, it will no longer be adjusted, and enter the next level of threshold adjustment, the adjustment level i is increased once, Adj_Counter is cleared to 0, S_Counter is cleared to 0; if not Arrived, then repeat (2) to (5) process.

(7) Judging whether the adjustment level i has reached L times, if so, stop the adjustment, if not, repeat the process from (2) to (6).

The method for reducing the probability of SR false alarms proposed by the present invention reduces the probability of base stations misjudging UE behaviors caused by SR false alarms, thereby saving scheduling overhead. In some scenarios, such as when the UE performs download and upload services, reducing SR false alarms can also improve demodulation performance and increase downlink traffic.

preferred embodiment

As shown in Figure 2, the process of false alarm detection for SR is as follows, including step S202 to step S220:

Step S202, initializing the SR false alarm correction flag of the current UE.

Step S204, judging whether the SR detection result SR_DTX_Flag of the UE at the current moment is forward SR, if yes, execute step S206, otherwise skip to step S220.

Step S206, judging whether the CQI period of the UE and the ACK feedback time arrive at the same time, if yes, execute step S208, otherwise execute step S210.

Step S208, judging whether the current UE allows simultaneous transmission of CQI and ACK, if yes, execute step S214, if not, execute step S218.

Step S210, judging whether the ACK feedback time has arrived but the CQI period has not arrived. If yes, execute step S212, otherwise execute step S214.

Step S212, comparing the DTX signal-to-noise ratio on the SR channel with the signal-to-noise ratio on the ACK code channel. If the DTX signal-to-noise ratio on the ACK code channel exceeds the preset threshold of the DTX signal-to-noise ratio on the SR channel, step S216 is performed. If the DTX signal-to-noise ratio on the ACK code channel does not exceed the preset threshold of the DTX signal-to-noise ratio on the SR channel, step S220 is performed.

Step S214, compare the DTX signal-to-noise ratio on the SR channel with the signal-to-noise ratio on the CQI code channel, if the signal-to-noise ratio on the CQI code channel exceeds the DTX signal-to-noise ratio preset threshold on the SR channel, then perform step S216, if the CQI code channel If the signal-to-noise ratio on the channel does not exceed the preset threshold of the DTX signal-to-noise ratio on the SR channel, step S220 is performed.

Step S216, determining that the SR is a false alarm.

Step S218, comparing the DTX signal-to-noise ratio on the SR channel with the signal-to-noise ratio on the ACK code channel. If the DTX signal-to-noise ratio on the ACK code channel exceeds the preset threshold of the DTX signal-to-noise ratio on the SR channel, step S216 is performed. If the DTX signal-to-noise ratio on the ACK code channel does not exceed the preset threshold of the DTX signal-to-noise ratio on the SR channel, step S214 is performed.

In step S220, the false alarm detection is completed, and the SR false alarm detection result is output.

Fig. 3 is a flow chart of adjusting the SR threshold, including steps S302 to S318:

Step S302, system parameter initialization. Det_Counter＝0 means that the SR detection counter is initialized to 0; FalseAlarm_Counter＝0 means that the false alarm counter is initialized to 0; Adj_Counter＝0 means that the adjustment times counter is initialized to 0; S_Counter＝0 means that the estimated false alarm probability is greater than the threshold of this level The false alarm probability counter corresponding to the middle and high thresholds is initialized to 0. The number of threshold adjustment stages is L, and the number of initialization thresholds is K=L+1.

The thresholds of all levels of initialization are arranged in order from low to high: Thesh(0), Thesh(1)...Thesh(K-1).

The corresponding false alarm probabilities are arranged in order from high to low: P(0), P(1), ... P(K-1).

Set the maximum number A of adjustments between the two levels of thresholds, and the number N of SR detections that needs to be counted for each adjustment.

Set the maximum number of times S that the estimated false alarm probability is greater than the false alarm probability corresponding to the middle and high thresholds of the threshold of this level, and S is less than or equal to A. , the next level of adjustment is required.

The current DTX decision threshold Cur_Thesh=Thesh(0); the initialization adjustment level i=1 means that the adjustment starts between the first level thresholds Thesh(0) and Thesh(1).

Step S304, calculating the adjustment step factor of each threshold level. Calculate the threshold adjustment step factor Thesh_Adj_Factor(i) for the current level i.

Thesh_Adj_Factor(i)=(Thesh(i)-Thesh(i-1))/A, indicating the threshold value that needs to be adjusted up for level i threshold adjustment.

Step S306, calculating the DTX signal-to-noise ratio SR_DTX_SNR of the SR code channel of the current subframe.

Step S308, the SR detection counter counts. Every time the SR detection cycle is detected, the SR detection counter is increased once, and the Det_Counter is increased by 1.

Step S310, judging whether the DTX signal-to-noise ratio of the SR is between the adjustment thresholds of the current stage and the output of the false alarm detection result is non-false alarm. If the DTX signal-to-noise ratio SR_DTX_SNR of the SR is between the threshold value Thesh(i-1) and Thesh(i), and the output of the false alarm detection result is not a false alarm, then execute step S312, otherwise, continue to execute step S306 .

In step S312, the SR false alarm counter (FalseAlarm_Counter) is incremented by 1.

Step S314, judging whether the SR detection counter has reached the preset N times. If yes, execute step S316, otherwise, continue to execute step S306.

Step S316, estimating the false alarm probability. Estimated false alarm probability Pre(i)=FalseAlarm_Counter/N×100%.

Step S318, judging whether the estimated false alarm probability is between the threshold adjustment probabilities of the current level. If yes, execute step S320, otherwise execute step S322.

Step S320, adjusting the threshold value. That is, the adjustment counter is incremented once, the SR detection count is cleared, the SR false alarm counter is cleared, the current preset threshold is updated to the adjusted low threshold, and the false probability corresponding to the low threshold of this threshold level is updated to the estimated false alarm probability.

Because the current threshold setting is too low, it is necessary to adjust the threshold. The specific settings are as follows: the adjustment times counter Adj_Counter is increased once, and at the same time, Thesh(i-1)=Cur_Thesh+Thesh_Adj_Factor(i)×Adj_Counter; Cur_Thesh=Thesh(i-1); P(i-1)=Pre(i); the SR detection counter Det_Counter is cleared to 0, and the SR false alarm counter FalseAlarm_Counter is cleared to 0.

Step S322, judging whether the estimated false alarm probability is greater than the false alarm probability corresponding to the high threshold. If yes, execute step S324, otherwise, execute step S326.

Step S324, adding 1 to the false alarm probability counter corresponding to the upper threshold of the estimated false alarm probability greater than the threshold of the level. That is, the estimated false alarm probability Pre(i) is greater than the false alarm probability P(i) corresponding to Thesh(i), and the S_Counter counter increases by 1.

Step S326, judging whether the false alarm probability counter corresponding to the high threshold in which the estimated false alarm probability is greater than the threshold of the level has reached a preset number of times. If yes, execute step S328, otherwise execute step S330.

Step S328, ending the adjustment of the threshold level. That is, if S_Counter is greater than S, the threshold adjustment of this level is ended, the adjustment level i is increased by 1, Adj_Counter is cleared to 0, and S_Counter is cleared to 0.

Step S330, judging whether the adjustment times counter reaches the preset times A. If yes, execute step S332, otherwise execute step S306.

Step S332, enter the next threshold level adjustment. That is, the adjustment series i increases by 1, Adj_Counter is cleared to 0, and S_Counter is cleared to 0.

Step S334, judging whether the number of adjustment stages reaches a preset number of times. If yes, execute step S336, otherwise execute step S306.

Step S336, end the process. That is, if the adjustment level i reaches L times, the adjustment is stopped.

The embodiment of the present invention also provides a device for adjusting the SR false alarm threshold value, as shown in Figure 4, including: a statistics module 10, used to count the number of times SR false alarms are detected within the preset detection times; a calculation module 20, coupled with the statistical module 10, used to calculate the SR false alarm probability according to the number of detected SR false alarms; the adjustment module 30, coupled with the calculation module 20, used to adjust the preset SR false alarm probability according to the SR false alarm probability threshold.

Wherein, the statistical module 10 may also include a judging unit 102 and a confirming unit 104, as shown in FIG. The discontinuous transmission DTX signal-to-noise ratio; the confirmation unit 104, coupled with the judgment unit 102, is used for when the signal-to-noise ratio on other control channels of the current subframe of the UE is greater than the discontinuous transmission DTX signal-to-noise ratio on the SR channel, Confirm that an SR false alarm is detected, where the DTX signal-to-noise ratio on the SR channel is the SR false alarm threshold.

In a preferred embodiment, the device may also include an execution module 40 shown in FIG. 6, coupled with the statistics module 10, for performing SR false alarm detection when a positive SR is detected on the period of the current subframe SR .

From the above description, it can be seen that the present invention achieves the following technical effects:

The above embodiments of the present invention perform false alarm detection on SR, and count the probability of false alarm detection in the total number of detections, and use the probability to adjust the threshold value to solve the problem that none of the related technologies can adjust the fixed threshold value. The method makes false alarms frequently occur under a fixed threshold value, resulting in a waste of system resources, and then the threshold can be adjusted in real time to reduce the probability of SR false alarms, improve system performance, and increase downlink traffic.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices Alternatively, they may be implemented in program code executable by a computing device so that they may be stored in a storage device to be executed by a computing device, and in some cases in an order different from that shown here The steps shown or described are carried out, or they are separately fabricated into individual integrated circuit modules, or multiple modules or steps among them are fabricated into a single integrated circuit module for implementation. As such, the present invention is not limited to any specific combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the 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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