CN1913663A - Method and system for obtaining congestion cause - Google Patents
Method and system for obtaining congestion cause Download PDFInfo
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- CN1913663A CN1913663A CNA2006101276404A CN200610127640A CN1913663A CN 1913663 A CN1913663 A CN 1913663A CN A2006101276404 A CNA2006101276404 A CN A2006101276404A CN 200610127640 A CN200610127640 A CN 200610127640A CN 1913663 A CN1913663 A CN 1913663A
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Abstract
This invention discloses a method and system for obtaining the congestion-causes in the high-speed downlink packet access. In the invention, the detected actual rate of business is compared with the ensuring bit rate to obtain the state of the service-congestion in the observing period. With an adequate data source, the described congestion-cause is obtained based on the parameter of the users' business rate reported by the station. The invention can accurately obtain the congestion-causes of the access network to reflect the network performance accurately, and is used to be the base of transmitting from HSDPA to DCH and resolve method of congestion.
Description
Technical field
The present invention relates to the communications field, relate in particular to the network performance state recognition technology in a kind of down high speed grouping access.
Background technology
Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code division multiple access) inserts (HSDPA by introducing the down high speed grouping, High Speed Downlink Packet Access), realize packet sharing on channel code and transmitting power, and Adaptive Modulation and Coding (AMC is adopted in selection, AdaptiVe Modulation and Coding), mix and retransmit (HARQ automatically, Hybrid automaticrepeat request) and technology such as fast dispatch further improve data rate, improve the capacity and the spectrum efficiency of system so greatly, also improved the quality of user's service.
In the Access Network side, in order to support above-mentioned HSDPA function, NodeB and subscriber equipment (UE, Userequipment) side increases HSDPA media access control layer (MAC-hs, Medium Access Controlfor HSDPA) entity, radio network controller (RNC, Radio Network Controller) dedicated medium access control (MAC-d, Medium Access Control-Dedicated) with Dedicated Traffic Channel (DTCH, Delicated Traffic Channel)/Dedicated Control Channel (DCCH, Delicated ControlChannel) data map on is to DSCH Downlink Shared Channel (HS-DSCH, High Speed DownlinkShered Channel) Frame sends to MAC-hs by MAC-d stream.MAC-hs need finish and MAC-d between flow control (share I UB transmission), sub-district in action such as the scheduling of user data and transformat selection, as shown in Figure 1, be the position view of MAC-hs in the prior art in protocol stack.
Flow Control entity, scheduling/processed entity, the automatic repeat requests entity of mixing, transformat and resource associating (TFRC are arranged among the MAC-hs, Transport format and resource combination) selects four functional entitys of entity, as shown in Figure 2, be MAC-hs functional entity schematic diagram in the prior art.
The Flow Control entity is used for controlling the ability that satisfies air interface from the data flow of MAC-d or MAC-hs, reduces time delay and stopping state by Flow Control.For each MAC-d data flow with independent priority, Flow Control is independently.
Scheduling/processed entity, the resource between coordination data stream and the HARQ, returning according to channel and ACK/NACK feedback decision New Development is to retransmit, and the numbering of priority, sequence and data block etc. is set.
The HARQ entity is handled the HARQ process.A HARQ entity can be handled a plurality of HARQ processes of a user, at a transmission time interval (TTI, Transmission Time Interval) on the High-Speed Shared Control Channel (HS-DSCH, High speed shared control channel), has only a HARQ process.
TFRC selects entity, selects suitable transformat according to channel situation and resource situation.
Dispatching method is being controlled shared resource allocation, has determined the behavior of whole system to a great extent.Should be during scheduling mainly based on channel condition, data volume and professional situations such as priority to be launched such as consider simultaneously, and give full play to the ability of HARQ.Dispatching method should consider mainly that the user who has best channel condition to moment launches data, can reach the highest user data rate and maximum data throughout in each moment like this, but also should be taken into account the fairness to each user simultaneously.Therefore, in dispatching method, need to take all factors into consideration, based on channel condition in a short time, take into account simultaneously long-term in all users' requirements such as throughput, time delay.
After inserting abundant user, power system capacity levels off to saturated gradually.After the channel circumstance variation of HSDPA, system can't come the indication of compensate for slower poor channel quality by means such as increase power again, and (Channelquality indicator CQI), thereby causes certain customers' speed to descend.System can in time find this phenomenon by MAC-hs, and promptly user rate is lower than and guarantees that (Guarantee Bit Rate GBR), and further judges congested reason and is: IUB bandwidth deficiency, power resource is not enough still yard inadequate resource bit rate.
Though prior art has some judgement that can reflect Access Network performance state feedbacks, but this is accurate not enough for network, we still need more can rapid, accurate and effective discovery network congestion technical scheme so that provide foundation for the various utilizations of network.
Summary of the invention
The invention provides a kind of congestion cause acquisition methods and system,, accurately reflect the performance situation of network, for follow-up various utilizations to network provide foundation in order to accurately to obtain the congested generation reason that Access Network exists.
Congestion cause acquisition methods of the present invention may further comprise the steps:
Detected user's practical business speed is compared with guaranteeing bit rate, obtain the customer service congestion state;
Under the sufficient situation of data source, the customer service rate parameter that reports according to the base station obtains described user's congestion cause.
Preferably, further comprise the steps:
Congestion cause is reported radio network controller.
Preferably, in the observation cycle, described detected user's practical business speed is compared with guaranteeing bit rate, to obtain the customer service congestion state.
Preferably, in the observation cycle, if RLC BUF 〉=GBR * T1, and/or RLC BUF discharge+surplus 〉=GBR * T, then obtaining the customer service congestion state is the data source abundance, otherwise data source is inadequate,
Wherein: RLC BUF is that Radio Link control is data cached, and GBR is for guaranteeing bit rate, and T1 is first duration, and T is the observation cycle.
Preferably, the integral multiple that is dispatching cycle in the scheduling medium access control layer method of described observation cycle.
Preferably, described first duration is smaller or equal to 200ms.
Preferably, the customer service rate parameter that reports of described base station is a whether limited parameter of the sign indicating number resources occupation rate parameter of each sub-district, base station and/or power resource occupancy parameter and/or IUB resource.
Preferably, the described customer service rate parameter that reports according to the base station obtains in described user's the congestion cause step, comprising:
When descending high-speed packet access code resource during greater than sign indicating number resource congestion thresholding, congestion cause is a sign indicating number inadequate resource;
When descending high-speed packet access power resource during greater than the power resource congestion threshold, congestion cause is the power resource deficiency;
When the resource-constrained parameter of feedback IUB, congestion cause is that the IUB interface resource is congested.
The present invention also provides a kind of congestion cause to obtain system, comprise detection module, first acquisition module, also comprise second acquisition module, be used in the observation cycle, the detected user's practical business of described detection module speed is compared with guaranteeing bit rate, obtain the customer service congestion state, under the sufficient situation of data source, transfer to the congestion cause that customer service rate parameter that described first acquisition module reports according to the base station obtains described user.
Preferably, further comprise reporting module, link to each other, be used for the congestion cause that described first acquisition module obtains is reported radio network controller with first acquisition module, radio network controller.
Preferably, described second acquisition module comprises first computing unit, second computing unit, the 3rd computing unit, the 4th computing unit that links to each other with acquiring unit respectively, wherein:
First computing unit is used to calculate RLC BUF and obtains first numerical value;
Second computing unit is used to calculate GBR * T1 and obtains second value;
The 3rd computing unit is used to calculate RLC BUF discharge+surplus and obtains third value;
The 4th computing unit is used to calculate GBR * T and obtains the 4th numerical value;
Acquiring unit was used in the observation cycle, if first numerical value 〉=second value, and/or third value 〉=the 4th numerical value, then getting access to the customer service congestion state is the data source abundance, otherwise is that data source is inadequate,
Wherein: RLC BUF is that Radio Link control is data cached, and GBR is for guaranteeing bit rate, and T1 is first duration, and T is the observation cycle.
Preferably, described second acquisition module links to each other with the base station, among the base station or outside.
Beneficial effect of the present invention is as follows:
The present invention then must have the user from congested appearance and not satisfy the phenomenon that guarantees bit rate, and then by the relation between Radio Link control buffer memory (Radio Link Control Buffer, RLC BUF) and the GBR, analyzes the congested origin cause of formation.Thereby can accurately obtain the congested generation reason of Access Network, reflect the performance situation of network accurately, for follow-up various utilizations to network provide foundation.
The present invention can be used as from HSDPA and switches to dedicated channel (Dedicated Channel, DCH) foundation, separate the foundation of congested method etc., equally, the present invention also can apply to based on same principle, need provided by the inventionly obtain among result's the various follow-up utilizations to network.
Description of drawings
Fig. 1 is the position view of MAC-hs described in the prior art in protocol stack;
Fig. 2 is the schematic diagram of MAC-hs functional entity described in the prior art;
Fig. 3 is the schematic flow sheet of congestion cause acquisition methods described in the embodiment of the invention;
Fig. 4 obtains the system configuration schematic diagram for congestion cause described in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described.
The GBR attribute disposes at network side, and for the user who has disposed GBR, system provides the speed that is not less than GBR for it, is necessary then that when congested the appearance condition is: have the discontented foot of user to guarantee bit rate.
And the reason that causes the user not satisfy GBR has following two kinds:
1, the user under the sufficient situation of the data source that is caused by sign indicating number inadequate resource, power resource deficiency, IUB bandwidth deficiency does not satisfy GBR;
2, the non-congested user that belongs under the inadequate situation of data source does not satisfy GBR.
Design of the present invention is, is discontented with this phenomenon of sufficient GBR from the user is arranged, and analyzes the congested real origin cause of formation.
RLC BUF refers to the metadata cache that is positioned at the layer on the MAC-hs.Before data are delivered to MAC-hs from high-rise (as layer three), can carry out buffer memory at rlc layer earlier.Just to the rlc layer indication, data promptly send to the MAC-hs layer from rlc layer when MAC-hs has enough abilities to hold new data.Can draw the congested origin cause of formation by the relation between RLC BUF and the GBR like this.
Just the user does not satisfy under the situation of GBR, and data source whether can judge by following condition by abundance:
1, in T, RLC BUF 〉=Thr (thresholding);
2, RLC BUF discharge+surplus 〉=GBR * T.
Can think the data source abundance as long as satisfy one of above-mentioned condition;
Wherein: T is that the MAC-hs dispatching method judges whether the user satisfies the observation cycle of GBR, is the integral multiple of dispatching cycle, can get 2s in the enforcement;
Thr in the condition 1 depends primarily on professional GBR, makes Thr=GBR * T1; T1 is more little, then data source easy more be judged as satisfied.In preferred the enforcement, take all factors into consideration factor such as Flow Control cycle after, can establish T1 〉=200ms.
Based on above-mentioned design, the concrete enforcement of congestion cause acquisition methods among the present invention is described below in conjunction with accompanying drawing.
In the enforcement, be located at and insert user A, B, C, D, E among the WCDMA successively, be the GBR=384kbps business.Suppose to be limited on the network capabilities 1M, then along with the user inserts gradually, service request speed (384k * 5) is greater than practical capacity (1M).Can observe the situation that satisfies of all users' actual speed rate and GBR by the MAC-hs dispatching method.Fig. 3 is a congestion cause acquisition methods schematic flow sheet of the present invention, as shown in the figure, comprises the steps:
The actual speed rate of supposing to observe user A is 100k, less than GBR=384k, then changes step 302 over to, and this step has been located object that may be congested.
In this step, press during judgement and satisfy: 1, in T, RLC BUF 〉=Thr (thresholding); Or 2, RLC BUF discharge+surplus 〉=GBR * T, can think the data source abundance as long as satisfy one of above-mentioned condition.
If the data source deficiency, then the observed phenomenon of this step is not congested, changes step 304 over to.Otherwise need change the judgement of congestion cause over to, this step and step 303 have been located congested reason have been taken place.
By calculating HSDPA sign indicating number resource operating position,, then think the congested of sign indicating number inadequate resource taken place in this step if satisfy the sign indicating number resources occupation rate＞Thr1 (sign indicating number resource congestion thresholding) of sub-district;
By calculating HSDPA power resource operating position,, then think the congested of power resource deficiency taken place if satisfy the power resource occupancy＞Thr2 (power resource congestion threshold) of sub-district;
Whether and to be obtained by RNC and NodeB interface IUB feedback congestion situation be the IUB resource congestion.
Above-mentioned 3 may take place simultaneously, cause congested jointly.
In concrete the enforcement, be " whether sign indicating number resources occupation rate, power resource occupancy, IUB resource be limited " 3 information of knowing each sub-district under it by NodeB, when judging the user and have congested (data source abundance and speed is lower than GBR), report these 3 information to give RNC;
After RNC receives this information, do following calculating:
Whether the sign indicating number resources occupation rate of RNC calculation plot is greater than sign indicating number resources occupation rate thresholding, if judge that then there is sign indicating number resource congestion situation in this sub-district;
Whether the power resource occupancy of RNC calculation plot is greater than power resource occupancy thresholding, if judge that then there is sign indicating number resource congestion situation in this sub-district;
If NodeB reports " IUB is resource-constrained ", it is congested that then RNC is judged as IUB;
At this moment, in utilization after the present invention knows congestion cause, put " * * reason is congested " mark just can for sub-district under the congested NodeB of generation;
Then RNC stops user's access of this sub-district;
The RNC starting load is reformed;
When NodeB no longer reports " congested " information, RNC removal respective cell " * * reason is congested " mark, can begin to allow user's access.
In the practice, the above-mentioned result who obtains can report RNC by NodeB as congested object, congestion cause, RNC just can make a strategic decision how to remove congested.
In the practice, can also be with the above-mentioned result of obtaining as the foundation that switches to DCH from HSDPA.It is owing to exist HSDPA and DCH2 kind to cover in the WCDMA network, when HSDPA covers unable service quality (the Quality of Service that necessity is provided for the user, QoS) afterwards, the WCDMA system can attempt the user is switched in the DCH covering, to guarantee user's QoS.
Based on same design, existing accompanying drawings congestion cause of the present invention obtains the embodiment of system.
Fig. 4 obtains the system configuration schematic diagram for congestion cause of the present invention.As shown in the figure, in system, comprise detection module 401, first acquisition module 402, second acquisition module 403, can also comprise reporting module 404 in preferred the enforcement, and in second acquisition module 403, can include: first computing unit 4031, second computing unit 4032, the 3rd computing unit 4033, the 4th computing unit 4034 that link to each other with acquiring unit 4035 respectively.
In the system, detection module 401, second acquisition module 403, first acquisition module 402, reporting module 404 are to link to each other successively.Second acquisition module is in the observation cycle, the detected user's practical business of detection module speed is compared with guaranteeing bit rate, obtain the customer service congestion state, under the sufficient situation of data source, transfer to the congestion cause that customer service rate parameter that first acquisition module reports according to the base station obtains described user.
Reporting module 404 can also link to each other with RNC, so just the congestion cause that first acquisition module obtains can be reported RNC, and RNC just can do corresponding the processing.
In second acquisition module, first computing unit is used to calculate RLC BUF and obtains first numerical value; Second computing unit is used to calculate GBR * T1 and obtains second value; The 3rd computing unit is used to calculate RLC BUF discharge+surplus and obtains third value; The 4th computing unit is used to calculate GBR * T and obtains the 4th numerical value;
Acquiring unit is in the observation cycle, if first numerical value 〉=second value, and/or third value 〉=the 4th numerical value, then getting access to the customer service congestion state is the data source abundance, otherwise is that data source is inadequate.
Wherein: RLC BUF is that Radio Link control is data cached, and GBR is for guaranteeing bit rate, and T1 is first duration, and T is that the MAC-hs dispatching method judges whether the user satisfies the observation cycle of GBR, is the integral multiple of dispatching cycle, can get 2s in the enforcement; T1 is more little, then data source easy more be judged as satisfied.In preferred the enforcement, take all factors into consideration factor such as Flow Control cycle after, can establish T1 〉=200ms.
When judging is when belonging to data source abundance situation, first acquisition module obtains, first acquisition module, is then thought the congested of sign indicating number inadequate resource has been taken place if satisfy the sign indicating number resources occupation rate＞Thr1 (sign indicating number resource congestion thresholding) of sub-district by calculating HSDPA sign indicating number resource operating position; By calculating HSDPA power resource operating position,, then think the congested of power resource deficiency taken place if satisfy the power resource occupancy＞Thr2 (power resource congestion threshold) of sub-district; Whether and to be obtained by Rnc and NodeB interface IUB feedback congestion situation be the IUB resource congestion.
Above-mentioned 3 may take place simultaneously, cause congested jointly.
Second acquisition module can link to each other with the base station, be positioned at physically among the NodeB or outside, by in NodeB, introducing judgement, just can find the congested of Access Network existence rapidly, accurately and efficiently like this to user rate, respective resources.Shu Chu congested user, resource situation can also be as the foundations of separating congested method simultaneously.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1, a kind of congestion cause acquisition methods is characterized in that, may further comprise the steps:
Detected user's practical business speed is compared with guaranteeing bit rate, obtain the customer service congestion state;
Under the sufficient situation of data source, the customer service rate parameter that reports according to the base station obtains described user's congestion cause.
2, the method for claim 1 is characterized in that, further comprises the steps:
Congestion cause is reported radio network controller.
3, the method for claim 1 is characterized in that, in the observation cycle described detected user's practical business speed is compared with guaranteeing bit rate, to obtain the customer service congestion state.
4, method as claimed in claim 3 is characterized in that, in the observation cycle, if RLC BUF 〉=GBR * T1, and/or RLC BUF discharge+surplus 〉=GBR * T, then obtaining the customer service congestion state is the data source abundance, otherwise data source is inadequate,
Wherein: RLC BUF is that Radio Link control is data cached, and GBR is for guaranteeing bit rate, and T1 is first duration, and T is the observation cycle.
As claim 3 or 4 described methods, it is characterized in that 5, the described observation cycle is the integral multiple of dispatching cycle in the scheduling medium access control layer method.
6, method as claimed in claim 4 is characterized in that, described first duration is smaller or equal to 200ms.
7, the method for claim 1 is characterized in that, the customer service rate parameter that described base station reports is a whether limited parameter of the sign indicating number resources occupation rate parameter of each sub-district, base station and/or power resource occupancy parameter and/or IUB resource.
As claim 1 or 7 described methods, it is characterized in that 8, the described customer service rate parameter that reports according to the base station obtains in described user's the congestion cause step, comprising:
When descending high-speed packet access code resource during greater than sign indicating number resource congestion thresholding, congestion cause is a sign indicating number inadequate resource;
When descending high-speed packet access power resource during greater than the power resource congestion threshold, congestion cause is the power resource deficiency;
When the resource-constrained parameter of feedback IUB, congestion cause is that the IUB interface resource is congested.
9, a kind of congestion cause obtains system, comprise detection module, first acquisition module, it is characterized in that, also comprise second acquisition module, be used in the observation cycle, the detected user's practical business of described detection module speed is compared with guaranteeing bit rate, obtain the customer service congestion state, under the sufficient situation of data source, transfer to the congestion cause that customer service rate parameter that described first acquisition module reports according to the base station obtains described user.
10, system as claimed in claim 9 is characterized in that, further comprises reporting module, links to each other with first acquisition module, radio network controller, is used for the congestion cause that described first acquisition module obtains is reported radio network controller.
11, system as claimed in claim 9 is characterized in that, described second acquisition module comprises first computing unit, second computing unit, the 3rd computing unit, the 4th computing unit that links to each other with acquiring unit respectively, wherein:
First computing unit is used to calculate RLC BUF and obtains first numerical value;
Second computing unit is used to calculate GBR * T1 and obtains second value;
The 3rd computing unit is used to calculate RLC BUF discharge+surplus and obtains third value;
The 4th computing unit is used to calculate GBR * T and obtains the 4th numerical value;
Acquiring unit was used in the observation cycle, if first numerical value 〉=second value, and/or third value 〉=the 4th numerical value, then getting access to the customer service congestion state is the data source abundance, otherwise is that data source is inadequate,
Wherein: RLC BUF is that Radio Link control is data cached, and GBR is for guaranteeing bit rate, and T1 is first duration, and T is the observation cycle.
12, system as claimed in claim 9 is characterized in that, described second acquisition module links to each other with the base station, among the base station or outside.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101276404A CN100420315C (en) | 2006-08-31 | 2006-08-31 | Method and system for obtaining congestion cause |
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| CNB2006101276404A CN100420315C (en) | 2006-08-31 | 2006-08-31 | Method and system for obtaining congestion cause |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101179771B (en) * | 2007-12-05 | 2010-06-09 | 中兴通讯股份有限公司 | Congestion state reporting method |
| CN101635952B (en) * | 2008-07-21 | 2012-02-22 | 电信科学技术研究院 | Method and device for controlling congestion in mobile communication system |
| CN102448106A (en) * | 2010-10-14 | 2012-05-09 | 中兴通讯股份有限公司 | Method and device for adjusting resource |
| CN101521912B (en) * | 2008-02-29 | 2012-07-04 | 电信科学技术研究院 | Congestion of mobile communication system and treatment method and device for recovering from congestion |
| CN105704057A (en) * | 2016-03-24 | 2016-06-22 | 华为技术有限公司 | Method and apparatus for determining service type causing burst port congestion and packet loss |
| WO2019001484A1 (en) * | 2017-06-30 | 2019-01-03 | 华为技术有限公司 | Method, apparatus and system for adjusting rate of sending side |
| WO2022116667A1 (en) * | 2020-12-04 | 2022-06-09 | 苏州浪潮智能科技有限公司 | Training task queuing cause analysis method and system, device and medium |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100370077B1 (en) * | 2000-08-07 | 2003-01-29 | 엘지전자 주식회사 | Method for Flow Control of data with Window Timer in a Communication System |
| US6889050B1 (en) * | 2000-11-22 | 2005-05-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Variable transmission rate services in a radio access network |
| US7660282B2 (en) * | 2003-02-18 | 2010-02-09 | Qualcomm Incorporated | Congestion control in a wireless data network |
| CN1713633B (en) * | 2004-06-24 | 2010-07-07 | 华为技术有限公司 | Control method of network flow |
| KR100922028B1 (en) * | 2004-10-27 | 2009-10-19 | 메시네트웍스, 인코포레이티드 | A system and method for providing quality of service provisions and congestion control in a wireless communication network |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101179771B (en) * | 2007-12-05 | 2010-06-09 | 中兴通讯股份有限公司 | Congestion state reporting method |
| CN101521912B (en) * | 2008-02-29 | 2012-07-04 | 电信科学技术研究院 | Congestion of mobile communication system and treatment method and device for recovering from congestion |
| CN101635952B (en) * | 2008-07-21 | 2012-02-22 | 电信科学技术研究院 | Method and device for controlling congestion in mobile communication system |
| CN102448106A (en) * | 2010-10-14 | 2012-05-09 | 中兴通讯股份有限公司 | Method and device for adjusting resource |
| CN102448106B (en) * | 2010-10-14 | 2015-08-12 | 中兴通讯股份有限公司 | The method and apparatus of adjustresources |
| CN105704057A (en) * | 2016-03-24 | 2016-06-22 | 华为技术有限公司 | Method and apparatus for determining service type causing burst port congestion and packet loss |
| CN105704057B (en) * | 2016-03-24 | 2019-01-08 | 华为技术有限公司 | The method and apparatus for determining the type of service of burst port congestion packet loss |
| WO2019001484A1 (en) * | 2017-06-30 | 2019-01-03 | 华为技术有限公司 | Method, apparatus and system for adjusting rate of sending side |
| US11108699B2 (en) | 2017-06-30 | 2021-08-31 | Huawei Technologies Co., Ltd. | Method, apparatus, and system for implementing rate adjustment at transmit end |
| WO2022116667A1 (en) * | 2020-12-04 | 2022-06-09 | 苏州浪潮智能科技有限公司 | Training task queuing cause analysis method and system, device and medium |
| US11775344B1 (en) | 2020-12-04 | 2023-10-03 | Inspur Suzhou Intelligent Technology Co., Ltd. | Training task queuing cause analysis method and system, device and medium |
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