WO2016123959A1

WO2016123959A1 - A method and system for processing scheduling request in drx state

Info

Publication number: WO2016123959A1
Application number: PCT/CN2015/087646
Authority: WO
Inventors: 熊忠元; 王俊
Original assignee: 武汉虹信通信技术有限责任公司
Priority date: 2015-02-05
Filing date: 2015-08-20
Publication date: 2016-08-11
Also published as: CN104581789A; CN104581789B

Abstract

The present invention relates to the technical field of communications, and disclosed in the present invention are a method and system for processing a scheduling request in a DRX state. The method comprises counting a scheduling density of a UE in a certain period, calculating the probability that the UE sends the Scheduling Request (SR) in a DRX dormant period according to the period that the UE sends the SR and the scheduling density, determining that the UE sends the SR and the number of times of the SR in need of continuous detection according to the probability that the UE sends the SR, and then determining whether the UE sends the SR in the dormant period. In the present invention, by means of determining whether the UE sends the SR according to the scheduling density of the UE during a period of time in the past and the SR sending period, the SR virtual detection probability is effectively reduced and the system performance is improved.

Description

Method and system for scheduling request processing in DRX state

Technical field

The present invention relates to the field of mobile communication technologies, and in particular, to a method and system for SR (Scheduling Request) processing in a DRX (Discontinuous Reception) state.

Background technique

When the UE (User Equipment) has uplink data to be transmitted and no uplink resources are available for transmission, the UE may request uplink resources from the base station through the SR. The UE may transmit the SR to the eNodeB (Evolved Node B) through the UCI (Uplink Control Information) of the PUCCH (Physical Uplink Control Channel) according to a certain period and the subframe position. The base station determines whether the UE has a resource requirement by detecting the received SR, and then sends a UL Grant (uplink grant) to the UE.

DRX is a working mechanism introduced by LTE (Long Term Evolution) system to save terminal power consumption. The RRC (Radio Resource Control) layer configures the DRX function for the UE, and the DRX controls whether the UE monitors the UE C-RNTI (Cell RNTI, Cell RNTI) on the PDCCH (Physical Downlink Control Channel). Addressing of TPC-PUCCH-RNTI, TPC-PUSCH-RNTI, and Semi-Persistent Scheduling C-RNTI. A UE that is in the RRC_CONNECTED state and configured with the DRX function may not continuously monitor the PDCCH channel, otherwise the UE needs to continuously monitor the PDCCH channel. The period during which the UE monitors the PDCCH channel is called the activation period of the DRX, and the period during which the UE stops listening to the PDCCH channel is called the sleep period of the DRX.

Among them, the activation period includes the following periods.

● OnDurationTimer: The duration timer, which allows the terminal to continuously monitor the number of PDCCH subframes at the beginning of the DRX cycle.

● Drx-InactivityTimer: The DRX inactivity timer. After receiving the PDCCH indication for scheduling new data, the terminal allows to continuously monitor the number of subframes of the PDCCH.

● The Drx-Retransmission Timer is the DRX retransmission timer. Each downlink HARQ (Hybrid Automatic Repeat-ReQuest) process is configured to indicate that the terminal needs to continuously monitor the number of PDCCH subframes when it expects to retransmit.

● Before the SR is sent on the PUCCH channel and is not acknowledged.

● The data in the HARQ retransmission buffer of the UE is pending, and the uplink resource grant of the HARQ retransmission may be received by the TTI.

● The non-contention random access process succeeds. After receiving the random access response, it has not received the authorization to send new data.

The eNodeB detects that the UE has sent the SR. Before the UE receives the uplink scheduling grant, the eNodeB considers that the UE is in the active state. Due to the complexity of the wireless environment, there is often a case of SR false check, which will result in a state asymmetry between the UE side and the eNodeB side UE. The SR virtual check means that the UE does not send the SR, and the eNodeB detects the SR due to interference of the wireless environment. In the case of non-DRX or during the activation of DRX, SR false check has little effect on system performance. When the SR virtual check occurs during the DRX sleep period, the eNodeB considers that the UE is in the active period when the UE is in the dormant period, which seriously affects system performance.

In the case of non-DRX or during the activation of DRX, if the UE does not send the SR, the eNodeB may detect the SR and send the UL-Grant to the UE due to the complexity of the radio channel environment. After the UE receives the UL-Grant, the UE There is no data to send. At this time, Pading will be sent. After the eNodeB receives the Pading, it determines that the UE has no data to send, and the system performance will not be affected.

During the DRX sleep period, if the UE does not send an SR, the eNodeB may detect the SR and send a UL-Grant to the UE. Since the UE is in the dormant period, it does not monitor the PDCCH. The eNodeB will detect the PUSCH after 8 TTIs. At this time, the CRC check is incorrect and will be retransmitted until the maximum number of retransmissions is reached. Serious impact on system uplink performance. Similarly, due to the SR virtual check, the eNodeB considers that the UE is in the active period, and the actual UE is in the dormant period, and the eNodeB sends a downlink scheduling to the UE. Since the UE is in the dormant period, the UE does not monitor the downlink PDCCH. At this time, the downlink resources are seriously wasted, which affects the downlink system performance.

Summary of the invention

The present invention provides a method for scheduling request processing in a DRX state, and estimates a probability that the UE transmits an SR during a sleep period according to a transmission period of the SR and an uplink scheduling density, and the eNodeB determines, according to the probability, whether the UE sends the SR. As much as possible to reduce the impact of SR virtual inspection on system performance.

A method for scheduling request processing in a DRX state, comprising the following steps;

Step 101: The scheduling density of the UE in the eNodeB statistical period T is Density-schedule;

Step 102: The eNodeB calculates a probability p that the UE sends the SR during the DRX sleep period according to the SR-period-sr and the Density-schedule of the UE.

Step 103: The eNodeB determines, according to the probability that the UE sends the SR, the number of times that the UE needs to continuously detect the SR.

Step 104: The eNodeB statistics continuously detect the number of times that the UE sends the SR, and according to whether the UE sends the SR probability, it is required to continuously detect the SR number threshold, and determine whether the UE sends the SR.

The step 101 includes: counting the scheduling density Density-schedule of each UE, that is, counting the ratio of the number of TTIs of the uplink scheduling of the UE to the period length in the period T, and the scheduling density in the period is used for sending the SR in the next period. Calculation of probability,

The TTINum-schedule is the number of scheduled TTIs, 0<TTINum-schedule<T, and T is the statistical period in ms.

When the UE is not scheduled within the period T, the TTINum-schedule is set to 1.

In the step 102, during the DRX sleep period, the relationship between the probability p that the UE sends the SR and the transmission period of the SR and the scheduling density of the UE are:

Among them, Period-sr-max is the maximum value of the cell SR period configuration; 0 ≤ α ≤ 1, 0 ≤ β ≤ 1.

When α=0, β=0, the probability p that the UE sends the SR at this time is equal to 1, indicating the probability that the UE sends the SR during the activation period;

When α=0, β≠0, the probability p that the UE sends the SR is less than 1 at this time, indicating that the probability that the UE sends the SR during the dormant period does not consider the period during which the UE sends the SR, and only considers the uplink scheduling density in the previous period T of the UE. ;

When α≠0, β=0, the probability p that the UE sends the SR is less than 1 at this time, indicating that the probability that the UE sends the SR during the dormant period does not consider the uplink scheduling density of the UE in the previous period T, and only considers that the UE sends the SR. cycle;

When α>β, it indicates that in the process of calculating the probability that the UE sends the SR, the uplink scheduling density of the UE plays a major role in the previous period;

When α<β, it means that in the process of calculating the probability that the UE transmits the SR, the UE sends the SR period as the main role.

In the step 102, during the DRX activation period, the probability that the UE sends the SR is 1, that is, the eNodeB detects that the UE sends the SR; then the eNodeB determines that the UE sends the SR and delivers the UL Grant.

The step 103 includes: establishing a correspondence between the probability that the UE sends the SR and the number of times the eNodeB determines that the UE needs to continuously detect the number of times the UE sends the SR;

The probability of transmitting the SR by the UE is divided into N levels, that is, N intervals, (0, p ₁ ], (p ₁ , p ₂ ] ... (p _N-2 , p _N-1 ], (p _N-1 , 1], corresponding to the first section, the second section, the (N-1th section), and the Nth section, the eNodeB corresponding to the N sections determines that the number of times the UE sends the SR needs to continuously detect that the UE sends the SR is respectively n ₁ , n ₂ ,...n _N-1 ,1, where N≥2,0<p ₁ <p ₂ <...<p _N-2 <p _N-1 <1, n ₁ >n ₂ >...>n _{N- 1} >1, n ₁ , n ₂ , ... n _N-1 , N is a positive integer;

According to the probability that the UE sends the SR calculated according to the step 102, if the probability that the UE sends the SR is in the first interval, the eNodeB determines that the UE needs to continuously detect that the number of times the UE sends the SR is n ₁ times; if the UE sends the SR If the probability is in the N-1th interval, then the eNodeB determines that the UE sends the SR and needs to continuously detect that the UE sends the SR for n _N-1 times.

In the step 103, the probability that the UE sends the SR during the activation period is 1, and the eNodeB determines that the number of times the UE sends the SR needs to continuously detect that the UE sends the SR.

In the step 104, the eNodeB counts the number of consecutive detections of the SR. If the last cycle statistics are obtained, and the UE continuously transmits the SR probability corresponding to the SR probability, the eNodeB determines that the UE sends the SR.

In the step 104, the eNodeB counts the number of consecutively detected SRs. If the last period statistics is not obtained, the eNodeB determines that the UE does not send the SR.

The present invention also provides a corresponding system, including sequentially connecting an uplink scheduling density statistics unit, the UE transmitting an SR probability calculation unit, the UE transmitting an SR decision unit, and the UE transmitting an SR determining unit;

The UE uplink scheduling density statistic unit, in the period T, the eNodeB collects the UE uplink scheduling density, and uses the probability calculation of the UE to send the SR in the next period;

The UE sends an SR probability calculation unit, and the eNodeB calculates a probability p that the UE sends the SR according to the period Period-sr of the UE transmitting the SR and the scheduling density;

p=f(Period-sr, Density-schedule)

The UE sends an SR decision unit, and the eNodeB counts the number of consecutive SRs sent by the UE, and determines whether the UE sends the SR according to whether it continuously detects the threshold of the number of times the UE sends the SR corresponding to the probability of the UE transmitting the SR;

Establish a correspondence between the probability of the UE transmitting the SR and the threshold for continuously detecting the number of SRs, and divide the probability interval in which the UE sends the SR into N levels, ie, N intervals, (0, p ₁ ], (p ₁ , p ₂ ]... (p _N-2 , p _N-1 ], (p _N-1 , 1), corresponding to the first interval, the second interval, the (N-1th interval, the Nth interval, and the N-th corresponding eNodeB, determining that the UE transmits The SR needs to continuously detect that the number of times the UE sends the SR is n ₁ , n ₂ , ... n _N-1 , 1. where _N ≥ ₂ , 0 < p ₁ < p ₂ <... <p _N-2 <p _N-1 <1, n ₁ > n ₂ > ... > n _N-1 > 1, n ₁ , n ₂ , ... n _N-1 , N is a positive integer;

When the probability that the UE sends the SR is in the first interval, the statistics continuously detect whether the number of times the UE sends the SR reaches n ₁ times. If the condition is met, the UE sends the SR determining unit to determine that the UE sends the SR.

The UE sends an SR determining unit, if the number of consecutively transmitted SRs of the UE does not reach the consecutive detected SR number threshold requirement corresponding to the UE sending SR probability, it is determined that the UE does not send the SR; if the UE continuously sends the number of SRs to reach the UE sending SR probability corresponding to If the SR number threshold requirement is continuously detected, it is determined that the UE has transmitted the SR.

The technical solution of the present invention has the following beneficial effects: compared with the prior art, according to the UE sending SR period and the UE scheduling density in the previous period T, estimating the probability that the UE sends the SR during the dormant period, and determining whether the UE sends according to the probability The SR effectively reduces the probability of SR false detection and improves system performance.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some implementations of the present invention. For example, other drawings may be obtained from those skilled in the art without any inventive effort.

FIG. 1 is a general flowchart of a scheduling request processing method in a DRX state.

2 is a detailed flowchart of a scheduling request processing method in a DRX state.

FIG. 3 is a block diagram of a scheduling request processing system in a DRX state.

detailed description

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The embodiment of the present invention provides a method and system for scheduling request processing in a DRX state, which mainly calculates the uplink scheduling density of the UE in the previous period, and calculates the probability of transmitting the SR in the current period according to the uplink scheduling density and the period in which the UE sends the SR. It is determined whether the eNodeB continuously detects whether the number of SRs meets the threshold requirement of the number of consecutive SR detections corresponding to the SR probability transmitted by the UE, and determines whether the UE transmits the SR, which will be described in detail below.

The method for processing the retrieval request in the DRX state provided by the embodiment of the present invention is described in detail below. As shown in Figure 1, the embodiment includes the steps of:

Step 101: The eNodeB counts the Density-schedule of the UE in the period T.

Step 102: The eNodeB calculates a probability p that the UE sends the SR during the DRX sleep period according to the Period-sr (the transmission period of the SR) and the Density-schedule of the UE.

Step 103: The eNodeB determines the number of times that the UE needs to continuously detect the SR according to the probability that the UE sends the SR.

Step 104: The eNodeB collects the number of SRs continuously, and determines whether the UE sends the SR according to whether the SR threshold is continuously detected according to whether the UE sends the SR probability.

In the embodiment, a more specific process is designed based on the above steps, as shown in FIG. 2 .

Step 201: The eNodeB counts the Density-schedule of the UE in a certain period T

;

Step 202: The eNodeB calculates the probability of the UE transmitting the SR during the DRX sleep period according to the Period-sr (the transmission period of the SR) and the Density-schedule of the UE.

p=f(Period-sr, Density-schedule)

When α=0, β=0, the probability p that the UE sends the SR at this time is equal to 1, indicating the probability that the UE sends the SR during the activation period.

When α=0, β≠0, the probability p that the UE sends the SR is less than 1 at this time, indicating that the probability that the UE sends the SR during the dormant period does not consider the period during which the UE sends the SR, and only considers the uplink scheduling density in the previous period T of the UE. .

When α≠0, β=0, the probability p that the UE sends the SR is less than 1 at this time, indicating that the probability that the UE sends the SR during the dormant period does not consider the uplink scheduling density of the UE in the previous period T, and only considers that the UE sends the SR. cycle.

When α>β, it indicates that in the process of calculating the probability that the UE transmits the SR, the uplink scheduling density of the UE plays a major role in the previous period.

Step 203: The eNodeB determines the number of times that the UE needs to continuously detect the SR according to the probability that the UE sends the SR.

The correspondence between the probability of the UE transmitting the SR and the number of consecutive SR requests for the uplink grant is required. It is assumed that the probability of transmitting the SR by the UE is divided into four intervals (0, p ₁ ], (p ₁ , p ₂ ], (p ₂ , p ₃ ], (p ₃ , 1), respectively, corresponding to the need to continuously detect the number of SRs respectively. Is n ₁ , n ₂ , n ₃ , 1, wherein n ₁ >n ₂ >n ₃ >1.

When the probability p that the UE sends the SR is in the interval (0, p ₁ ), the eNodeB determines that the UE sends the SR, and needs to continuously detect that the UE sends the SR n ₁ time;

When the probability p that the UE sends the SR is in the interval (p ₁ , p ₂ ), the eNodeB determines that the UE sends the SR, and needs to continuously detect that the UE sends the SR n ₂ times;

When the probability p of the UE transmitting the SR is in the interval (p ₂ , p ₃ ), the eNodeB determines that the UE sends the SR, and needs to continuously detect that the UE sends the SR n ₃ times;

When the probability p of the UE transmitting the SR is in the interval (p ₃ , 1), the eNodeB determines that the UE sends the SR, and needs to continuously detect that the UE sends the SR once;

Step 204: The eNodeB determines whether the number of times that the UE sends the SR continuously reaches the threshold requirement corresponding to the UE sending the SR probability. If the condition is met, the process goes to step 205; otherwise, the process goes to step 206.

It is assumed that the eNodeB continuously detects that the number of times the UE sends the SR is m (m>0) times.

When the UE sends the SR probability p in the (0, p ₁ ) interval, as long as m ≥ n ₁ , then go to step 205 to determine that the UE sends the SR, otherwise go to step 206, and determine that the UE does not send the SR;

When the UE sends the SR probability p in the interval (p ₁ , p ₂ ), as long as m ≥ n ₂ , then go to step 205, and determine that the UE sends the SR, otherwise go to step 206, and determine that the UE does not send the SR;

When the UE sends the SR probability p in the interval (p ₂ , p ₃ ), as long as m ≥ n ₃ , then go to step 205, and determine that the UE sends the SR, otherwise go to step 206, and determine that the UE does not send the SR;

When the UE sends the SR probability p in the interval (p ₃ , 1), if m ≥ 1, then go to step 205, and determine that the UE sends the SR, otherwise go to step 206, and determine that the UE does not send the SR;

Step 205: The eNodeB determines that the UE sends the SR.

The eNodeB determines that the UE sends the SR and sends a UL Grant to the UE.

Step 206: The eNodeB determines that the UE does not send the SR.

The eNodeB determines that the UE does not send the SR, and does not perform any processing on the SR currently sent by the UE.

The present invention also provides a corresponding system, as shown in FIG. The embodiment is a system for scheduling request processing in the DRX state, which is sequentially connected to the statistics unit 301, the calculation unit 302, the decision unit 303, and the determination unit 304.

The statistic unit 301, in a certain period T, the eNodeB counts the UE uplink scheduling density, and is used for the probability calculation of the UE transmitting the SR in the next period.

The calculating unit 302 calculates an probability that the UE sends the SR according to the period in which the UE sends the SR and the scheduling density. Establish a function relationship between the probability that the UE transmits the SR during the sleep period and the period in which the UE transmits the SR and the scheduling density.

The probability that the UE sends the SR during the activation period is 1.

The determining unit 303 calculates, by the eNodeB, the number of times that the UE continuously sends the SR, and determines whether the UE sends the SR according to whether it meets the consecutive detection of the SR number threshold requirement corresponding to the UE sending SR probability.

The determining unit 304 determines that the UE does not send the SR when the number of times the UE continuously transmits the SR does not reach the consecutive detection of the SR number threshold corresponding to the UE sending the SR probability, and determines that the UE sends the SR and sends the corresponding UL-Grant.

The specific implementation of each module corresponds to the specific implementation of the above steps, and can be implemented by software modular technology.

The foregoing is a detailed description of a method and system for scheduling request processing in a DRX state according to an embodiment of the present invention. The present invention uses an individual instance to explain the detailed flow of the present invention, but the above embodiment is only for explaining the present invention. Technical solution rather than limiting it. Although the present invention has been described in detail with reference to the preferred embodiments thereof, those skilled in the art should understand that the invention may be modified or equivalently substituted, and the modifications or equivalents may not be modified. The following technical solutions are omitted from the spirit and scope of the technical solutions of the present invention.

Claims

A method for scheduling request processing in a DRX state, comprising: the following steps;

Step 101: The scheduling density of the UE in the eNodeB statistical period T is Density-schedule;

Step 102: The eNodeB calculates a probability p that the UE sends the SR during the DRX sleep period according to the SR-period-sr and the Density-schedule of the UE.

Step 103: The eNodeB determines, according to the probability that the UE sends the SR, the number of times that the UE needs to continuously detect the SR.

Step 104: The eNodeB statistics continuously detect the number of times that the UE sends the SR, and according to whether the UE sends the SR probability, it is required to continuously detect the SR number threshold, and determine whether the UE sends the SR.
The method for processing scheduling request in the DRX state according to claim 1, wherein the step 101 includes counting the scheduling density Density-schedule of each UE, that is, counting the uplink scheduling of the UE in the period T. The ratio of the number of TTIs to the length of the period, and the scheduling density in the period is used to calculate the probability of the SR transmitted by the UE in the next period.

The TTINum-schedule is the number of scheduled TTIs, 0<TTINum-schedule<T, and T is the statistical period in ms.

When the UE is not scheduled within the period T, the TTINum-schedule is set to 1.
The method for scheduling request processing in a DRX state according to claim 1, wherein:

In the step 102, during the DRX sleep period, the relationship between the probability p that the UE sends the SR and the transmission period of the SR and the scheduling density of the UE are:

Wherein, Period-sr-max is the maximum value of the cell SR period configuration; 0 ≤ α ≤ 1, 0 ≤ β ≤ 1;

When α=0, β=0, the probability p that the UE sends the SR at this time is equal to 1, indicating the probability that the UE sends the SR during the activation period;

When α=0, β≠0, the probability p that the UE sends the SR is less than 1 at this time, indicating that the probability that the UE sends the SR during the dormant period does not consider the period during which the UE sends the SR, and only considers the uplink scheduling density in the previous period T of the UE. ;

When α≠0, β=0, the probability p that the UE sends the SR is less than 1 at this time, indicating that the probability that the UE sends the SR during the dormant period does not consider the uplink scheduling density of the UE in the previous period T, and only considers that the UE sends the SR. cycle;

When α>β, it indicates that in the process of calculating the probability that the UE sends the SR, the uplink scheduling density of the UE plays a major role in the previous period;

When α<β, it means that in the process of calculating the probability that the UE sends the SR, the UE sends the SR period to start. To be effective.
The method for scheduling request processing in a DRX state according to claim 1, wherein:

In the step 102, during the DRX activation period, the probability that the UE sends the SR is 1, that is, the eNodeB detects that the UE sends the SR; then the eNodeB determines that the UE sends the SR and delivers the UL Grant.
The method for scheduling request processing in a DRX state according to claim 1, wherein:

The step 103 includes: establishing a correspondence between the probability that the UE sends the SR and the number of times the eNodeB determines that the UE needs to continuously detect the number of times the UE sends the SR;

The probability of transmitting the SR by the UE is divided into N levels, that is, N intervals, (0, p 1 ], (p 1 , p 2 ] ... (p N-2 , p N-1 ], (p N-1 , 1], corresponding to the first section, the second section, the (N-1th section), and the Nth section, the eNodeB corresponding to the N sections determines that the number of times the UE sends the SR needs to continuously detect that the UE sends the SR is respectively n 1 , n 2 ,...n N-1 ,1, where N≥2,0<p 1 <p 2 <...<p N-2 <p N-1 <1, n 1 >n 2 >...>n N- 1 >1, n 1 , n 2 , ... n N-1 , N is a positive integer;

According to the probability that the UE sends the SR calculated according to the step 102, if the probability that the UE sends the SR is in the first interval, the eNodeB determines that the UE needs to continuously detect that the number of times the UE sends the SR is n 1 times; if the UE sends the SR If the probability is in the N-1th interval, then the eNodeB determines that the UE sends the SR and needs to continuously detect that the UE sends the SR for n N-1 times.
The method for scheduling request processing in a DRX state according to claim 1, wherein:

In the step 103, the probability that the UE sends the SR during the activation period is 1, and the eNodeB determines that the number of times the UE sends the SR needs to continuously detect that the UE sends the SR.
The method for scheduling request processing in a DRX state according to claim 1, wherein:

In the step 104, the eNodeB counts the number of consecutive detections of the SR. If the last cycle statistics are obtained, and the UE continuously transmits the SR probability corresponding to the SR probability, the eNodeB determines that the UE sends the SR.
The method for scheduling request processing in a DRX state according to claim 1, wherein:

In the step 104, the eNodeB counts the number of consecutively detected SRs. If the last period statistics is not obtained, the eNodeB determines that the UE does not send the SR.
A DRX state scheduling request processing system according to the method of claim 1, comprising: sequentially connecting an uplink scheduling density statistic unit, the UE transmitting an SR probability calculation unit, the UE transmitting an SR decision unit, and the UE transmitting an SR determining unit;

The UE uplink scheduling density statistic unit, in the period T, the eNodeB collects the UE uplink scheduling density, and uses the probability calculation of the UE to send the SR in the next period;

Transmitting, by the UE, an SR probability calculation unit, the eNodeB according to a period in which the UE sends the SR Period-sr And the scheduling density calculates a probability p that the UE sends the SR;

p=f(Period-sr, Density-schedule)

The UE sends an SR decision unit, and the eNodeB counts the number of consecutive SRs sent by the UE, and determines whether the UE sends the SR according to whether it continuously detects the threshold of the number of times the UE sends the SR corresponding to the probability of the UE transmitting the SR;

Establish a correspondence between the probability of the UE transmitting the SR and the threshold for continuously detecting the number of SRs, and divide the probability interval in which the UE sends the SR into N levels, ie, N intervals, (0, p 1 ], (p 1 , p 2 ]... (p N-2 , p N-1 ], (p N-1 , 1), corresponding to the first interval, the second interval, the (N-1th interval, the Nth interval, and the N-th corresponding eNodeB, determining that the UE transmits The SR needs to continuously detect that the number of times the UE sends the SR is n 1 , n 2 , ... n N-1 , 1. where N ≥ 2 , 0 < p 1 < p 2 <... <p N-2 <p N-1 <1, n 1 > n 2 > ... > n N-1 > 1, n 1 , n 2 , ... n N-1 , N is a positive integer;

When the probability that the UE sends the SR is in the first interval, the statistics continuously detect whether the number of times the UE sends the SR reaches n 1 times. If the condition is met, the UE sends the SR determining unit to determine that the UE sends the SR.

The UE sends an SR determining unit, if the number of consecutively transmitted SRs of the UE does not reach the consecutive detected SR number threshold requirement corresponding to the UE sending SR probability, it is determined that the UE does not send the SR; if the UE continuously sends the number of SRs to reach the UE sending SR probability corresponding to If the SR number threshold requirement is continuously detected, it is determined that the UE has transmitted the SR.