CN101594622B - Method, device and system for detecting dormant cell - Google Patents
Method, device and system for detecting dormant cell Download PDFInfo
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- CN101594622B CN101594622B CN2009100535000A CN200910053500A CN101594622B CN 101594622 B CN101594622 B CN 101594622B CN 2009100535000 A CN2009100535000 A CN 2009100535000A CN 200910053500 A CN200910053500 A CN 200910053500A CN 101594622 B CN101594622 B CN 101594622B
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Abstract
The invention relates to the technical field of communication, and in particular provides a method, a device and a system for detecting a dormant cell. The method for detecting the dormant cell comprises the following steps: acquiring a key performance index (KPI) correlative with user access in a cell; if the acquired KPI is detected to satisfy the preset dormant cell KPI condition, determining the cell as the dormant cell; and if the cell is determined as the dormant cell, generating a dormant cell warning alarm so as to detect the dormant cell quickly and accurately.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a system for detecting a dormant cell.
Background
A WCDMA (Wideband Code Division Multiple Access) system consists of 3 parts, namely a Core Network (CN), a Radio Network Subsystem (RNS) and User Equipment (UE). The Radio Network subsystem includes two functional entities, namely a Radio Network Controller (RNC) and a base station Node B. The RNC is connected to the CN via an Iu interface, and is used to allocate and control the radio resources of the Node B associated therewith. Node B is the base station of WCDMA system, which is connected with RNC through Iub interface, and Node B completes the conversion of data flow between Iub interface and Uu interface (radio interface) and participates in part of radio resource management. The UE is user terminal equipment and interacts with the Node B through a Uu interface. If the Cell in which the UE is located belongs to the coverage area of a certain base station, all states of the Cell are normal, no base station alarm is given, but all or most of channels/resources in the Cell are unavailable, that is, the Cell is a dormant Cell (SLC), and at this time, the user does not make a call, and the satisfaction is reduced.
In the process of implementing the invention, the inventor finds that:
in the prior art, no good solution is available, and the dormant cell can be detected.
Disclosure of Invention
The embodiment of the invention provides a detection method, a device and a system of a dormant cell, which can quickly and accurately detect the dormant cell.
The embodiment of the invention is realized by the following technical scheme:
an embodiment of the present invention provides a method for detecting a dormant cell, including:
acquiring key performance indicators KPI related to user access in a cell;
if the KPI obtained by detection meets the KPI condition of a preset dormant cell, determining the cell as the dormant cell;
and if the cell is determined to be the dormant cell, generating a dormant cell alarm.
Another embodiment of the present invention further provides a device for detecting a dormant cell, where the device includes: an obtaining unit, configured to obtain a key performance indicator KPI related to user access in a cell; the detection unit is used for determining whether the cell is a dormant cell or not by detecting whether the acquired KPI meets the KPI condition of a preset dormant cell; the alarm generating unit is used for generating a dormant cell alarm when the detection result of the detecting unit is that the cell is a dormant cell; and the recovery analysis unit is used for analyzing whether the KPI of the cell meets a set dormant cell recovery threshold or not, and if the detection result is yes, judging that the cell is recovered.
Still another embodiment of the present invention further provides a detecting system for a dormant cell, including the detecting apparatus for a dormant cell.
According to the technical scheme, the key performance index KPI related to user access is obtained, and when the detected cell is the dormant cell, the dormant cell alarm is generated by combining the key performance index KPI and the set detection condition meeting the dormant cell, so that the dormant cell is detected quickly and accurately.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart of a method for detecting a dormant cell according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for detecting the number of times a RRC connection request message is received;
FIG. 3 is a flowchart of a method for detecting the number of successful radio resource control connection establishments in a cell;
FIG. 4 is a flowchart of a method for detecting the number of times of establishment of a RRC connection initiated in a cell;
FIG. 5 is a flowchart of a method for detecting radio bearer establishment times in a cell;
FIG. 6 is a flowchart of a method for detecting the number of successful radio bearer establishments in a cell;
fig. 7 is a flowchart of a method for detecting a dormant cell according to an embodiment of the present invention;
fig. 8 is a schematic diagram of an apparatus for detecting a dormant cell according to another embodiment of the present invention;
fig. 9 is a schematic diagram of an apparatus for detecting a dormant cell according to still another embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a subset of the embodiments of the invention and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the technical solution of the present invention easier to understand for those skilled in the art, the technical solution of the present invention will be briefly described below.
And detecting various key performance indexes related to access, and generating a dormant cell alarm when the cell is determined to be the dormant cell by combining the key performance indexes and the set condition meeting the dormant cell. And for the cell which is determined to be the dormant cell, if the cell does not meet the set condition of meeting the dormant cell within the set time period, performing recovery analysis, detecting whether the key performance index of the cell meets the set dormant cell recovery threshold, and if the detection result is yes, judging that the cell is recovered.
The following examples illustrate the invention in detail:
referring to fig. 1, a flowchart of a method for detecting a dormant cell according to an embodiment of the present invention is shown, where the method includes:
s101: and acquiring key performance indicators KPI related to user access in the cell.
Wherein the key performance indicators include KPI: the method comprises the steps that the Radio Resource Controller (RRC) connection request message is received by a Radio network controller for the first time, and/or the total bandwidth power received by a cell, and/or the number of times of RRC connection establishment success in the cell, and/or the number of times of initiating RRC connection establishment in the cell, and/or the number of times of Radio Bearer (RB) establishment in the cell, and/or the number of times of RB establishment success in the cell, and/or the number of times of direct retry of RRC connection establishment, and/or the number of times of direct retry of RB establishment, and/or the number of times of successful direct retry of RB establishment; and/or a cell unavailability duration.
S102: and (3) judging (or detecting) whether the acquired KPI meets the preset KPI condition of the dormant cell, if so, determining that the cell is the dormant cell, and executing S103.
Wherein, the acquired KPI satisfies the preset KPI condition of the dormant cell, including at least one of the following A to D:
A. the acquired KPIs comprise: when the cell unavailable state duration and the number of times of establishing Radio Resource Control (RRC) connection initiated in the cell, the acquired KPI meets the preset dormant cell KPI conditions, including:
the cell unavailable state duration is equal to 0; and the number of times of RRC connection establishment initiated in the cell in the current detection period is less than or equal to a preset first threshold; the difference between the times of establishing the RRC connection initiated in the cell in the current detection period and the times of establishing the RRC connection initiated in the cell in the previous detection period is larger than a preset second threshold, and the times of establishing the RRC connection initiated in the cell in the previous detection period is larger than a first threshold;
or, the cell unavailable state duration is equal to 0; and the number of RRC connection establishment initiated in the cell in a plurality of consecutive detection periods (which may be a preset time period) is 0.
B. The acquired KPIs comprise: when the times of the RRC connection request message and the times of the RRC connection establishment success are counted, the acquired KPI meets the preset KPI condition of the dormant cell, and the method comprises the following steps:
the number of times of RRC connection establishment initiated in the cell in the current detection period is greater than or equal to a preset first threshold; the success rate of RRC connection establishment in the cell is smaller than a preset third threshold;
wherein, the RRC connection establishment success rate is the number of times of RRC connection establishment success/the number of times of the RRC connection request message.
C. The acquired KPIs comprise: when the radio bearer RB establishment success times and the RB establishment times are carried out, the acquired KPI meets the preset KPI conditions of the dormant cell, and the method comprises the following steps:
the frequency of establishing the RB in the cell in the current detection period is greater than a preset fourth threshold, and the success rate of establishing the RB in the cell is less than a preset fifth threshold;
wherein, the RB establishment success rate is RB establishment success times/RB establishment times.
D. The KPI comprises: when the RB establishes the direct retry times and the RB establishes the direct retry success times, the acquired KPI meets the preset KPI conditions of the dormant cell, and the method comprises the following steps:
the RB establishment direct retry times in the cell in the current detection period are larger than a preset sixth threshold, and the RB establishment direct retry success rate in the cell is smaller than a preset seventh threshold;
wherein, the RB establishment direct retry success rate is equal to the RB establishment direct retry success times/the RB establishment direct retry times.
S103: and generating a dormant cell alarm.
In this embodiment, the process of acquiring the KPI by the RNC is as follows:
(1) referring to fig. 2, a flow chart of a method for detecting the number of times an RRC connection request message is received for an RNC.
Measurement index
VS.RRC.AttConnEstab
Means of
The index is the number of times that the RNC receives an RRC CONNECTION REQUEST (CONNECTION REQUEST) message sent by the UE counted by the RNC. Each time a UE attempts to access a network, the UE needs to initiate an RRC connection request to the RNC, and actually, when a UE initiates RRC connection establishment, in order to improve the probability of connection, the UE may send multiple RRC connection request messages. Vs. RRC. attconnestab is counted each time the RNC receives an RRC connection request message.
Measuring point
As shown in fig. 2 at point a, the RNC counts the indicator when it receives a radio resource control connection REQUEST (RRCCONNECTION REQUEST) message from the UE.
(2) Referring to fig. 3, a flow chart of a method for detecting the number of successful RRC connection establishment in a cell for an RNC is shown.
Measurement index
VS.RRC.SuccConnEstab.Cell
Means of
The index is the number of times that the RNC receives an RRC CONNECTION SETUP success (RRC CONNECTION SETUP COMPLETE) message returned by the UE in the cell range where the UE is located counted by the RNC.
Measuring point
As shown in point a in fig. 3, when receiving an RRC connection SETUP success (rrcconnectionsetup COMPLETE) message returned by the UE, the RNC counts the index according to the cell where the UE is located.
(3) Referring to fig. 4, a flow chart of a method for detecting the number of RRC connection establishments initiated in a cell for an RNC.
Measurement index
VS.RRC.SetupConnEstab
Means of
The index is the number of times that the RNC receives the RRC radio resource control connection request message from the UE and sends the radio resource control connection establishment message to the UE in the cell range of the UE counted by the RNC.
Measuring point
As shown in point a in fig. 4, after receiving the RRC connection request message from the UE, the RNC initiates an RRC connection establishment procedure, and after the network side succeeds in the related operation, the RNC sends the RRC connection establishment message to the UE, and at this time, the index is counted according to the cell where the UE is located. When RNC receives the radio resource control connection request message retransmitted by UE, RNC can repeatedly transmit the radio resource control connection establishment message to UE, but at this time, the number of times of retransmission radio resource control connection establishment is not counted.
(4) Referring to fig. 5, a flow chart of a method for detecting the number of RB establishments in a cell for an RNC is shown.
Measurement index
VS.AttRBSetup
Means of
The index is the number of times of RADIO BEARER SETUP (RADIO BEARER SETUP) messages sent to the UE by the RNC within the cell range of the UE counted by the RNC.
Measuring point
As shown in point a in fig. 5, when the RNC sends a radio bearer setup message to the UE, the index is counted according to the cell in which the UE is located.
(5) Referring to fig. 6, a flow chart of a method for detecting the number of successful RB establishment times in a cell for an RNC is shown.
Measurement index
VS.SuccRBSetup
Means of
The index is the number of times that the RNC receives the radio bearer establishment message sent by the UE in the cell range of the UE counted by the RNC.
Measuring point
As shown in point B in fig. 6, when the RNC receives the radio bearer setup success message sent by the UE, the index is counted according to the cell in which the UE is located.
(6) Number of Direct Retries (DRD) of RB connection establishment
Measurement index
VS.DRD.RB.D2H.AttIn
Means of
The index counts the times of establishing or reconfiguring messages from DCH (Dedicated Channel) to HSDPA (High Speed Downlink Packet Access) of the RB sent to the UE by the RNC in the cell.
Measuring point
This index is accumulated each time the cell handles the setup or reconfiguration of an RB from DCH to HSDPA.
(7) Number of Direct Retry (DRD) successes for RB connection setup
Measurement index
VS.DRD.RB.D2H.SuccIn
Means of
The index counts the number of times that the RNC sends a message for establishing or reconfiguring the RB from the DCH to the HSDPA to the UE in the cell.
(8) Cell unavailable status duration
Measurement index
VS.Cell.UnavailTime.OM
Description of the invention
The index is the cell unavailable duration counted by the RNC.
Measuring point
After the cell is established, the RNC calculates the accumulated unavailable time of the cell in the measurement period.
The following illustrates a method for detecting the dormant cell shown in fig. 1:
a dormant cell detection period (which may be understood as a detection period) is set. The method can be used when the traffic is busy, for example, 9: 00-17: 00 of an office every day; the residential area is 18: 00-23: 00 every day and the like.
The RNC obtains the information of the cell access limitation (whether the cell is in a user access forbidden (BAR) state or a user access allowed (UNBAR) state) according to the configuration data of the RNC, wherein the BAR state forbids all new users of the cell to access and the UNBAR state allows all new users of the cell to access). As shown in the procedure of detecting the dormant cell provided in fig. 7, when the cell is in the UNBAR state, at least one of (i) to (iv) is used to detect the dormant cell, and when the cell is in the BAR state, the (iv) is used to detect the dormant cell.
The following describes a case where a cell is determined to be a dormant cell when the acquired KPI satisfies any one of (i) to (iv).
The key performance indexes acquired by the cell include: the process of determining the cell as the dormant cell comprises the following steps of the time length of the unavailable state of the cell and the frequency of the radio resource control connection request message initiated in the cell:
and when the acquired KPIs simultaneously meet the following 4 conditions, determining the cell to be a dormant cell.
1. The cell is in UNBAR state
2. Cell unavailable state duration equals 0
Namely: vs. cell.unavailtime.om (SUM) ═ 0
SUM represents the SUM of the corresponding indicators during the dormant cell detection period.
3. The number of times of the RRC connection request message initiated in the cell in the current detection period is less than or equal to a preset first threshold B (for example, the default value can be 10 times)
Namely: VS. RRC. AttConnEstab (SUM) < ═ B
SUM represents the SUM of the corresponding indicators during the dormant cell detection period.
4. The difference between the times of initiating the RRC connection request message in the cell in the current detection period and the previous detection period is larger than a preset second threshold, and the times of initiating the RRC connection request message in the cell in the previous detection period is larger than a first threshold. For example, the difference between the number of times that the RNC receives the RRC connection request message initiated in the cell in the current time period is greater than a preset second threshold C (for example, the default value may be 80%) than in the previous X days, and the number of times that the RNC receives the RRC connection request message initiated in the cell in the previous X days in the same time period is greater than the first threshold B (for example, the default value may be 10).
Namely: (VS. RRC. AttConnEstab (-Xday) -VS. RRC. AttConnEstab (now))/VS. RRC. AttConnEstab (-Xday) > C & & VS. RRC. AttConnEstab (-Xday) > B
Where, the condition 4 is a condition that the differential detection is satisfied, that is: in the detection process, a difference algorithm and the historical KPI are combined, so that the accuracy of the detection of the dormant cell can be improved.
Wherein, the cell unavailable state duration is obtained by the method described in (8) in the first embodiment; the number of times that the RNC receives the RRC connection request message initiated in the cell is obtained by the method described in (1) in the first embodiment; the number of times the RRC connection request message originated in the cell within the previous detection period is obtained from a locally stored historical database of key performance indicators that stores historical data of key performance indicators that need to be referenced when detecting dormant cells over a recent period of time (e.g., one month).
Or, whether the following 3 conditions are simultaneously satisfied is detected, and when the following conditions are simultaneously satisfied, the cell is determined to be a dormant cell.
1. The cell is in UNBAR state
2. Cell unavailable state duration equals 0
Namely: vs. cell.unavailtime.om ═ 0
3. The number of RRC connection establishment initiated in the cell in consecutive preset time periods (detection periods) is 0, for example, the number of RRC connections in the first M (for example, the default value may be 72) hours is 0.
Namely: vs. rrc. attconnestab (-M hour) &0 &
Secondly, key performance indexes acquired by the cell include: the process of determining the cell as the dormant cell by the times of the RRC connection request message received by the RNC and the times of the RRC connection establishment success is as follows:
whether the following 3 conditions are simultaneously satisfied is detected, and when the following conditions are simultaneously satisfied, the cell is determined to be a dormant cell.
1. The cell is in UNBAR state
2. The number of times that the RNC receives the RRC connection request message initiated in the cell in the current detection period is greater than or equal to a preset first threshold B (for example, the default value can be 10 times)
Namely: VS.RRC.AttConnEtab > B
3. The success rate of RRC establishment in the cell is less than a preset third threshold D (for example, the default value can be 10%)
Namely: RRC connection establishment success rate (vs. RRC. serving. cell. rate) ═ number of times of RRC connection establishment success (RRC. serving. sum)/number of times of RRC connection request message received by RNC (vs
The number of times of the RRC connection request message received by the RNC is obtained by using the method described in (1) in the first embodiment; the number of times of successful RRC connection establishment is obtained by using the method described in (2) in embodiment one.
The key performance indexes acquired by the cell include: the successful times of establishing the RB and the times of establishing the RB in the cell, and the process of determining the cell as the dormant cell is as follows:
and when the following conditions are met, determining the cell as a dormant cell.
The RB establishment frequency in the cell in the current detection period is greater than a preset fourth threshold E (for example, the default value can be 10), and the RB establishment success rate is less than a preset fifth threshold F (for example, the default value can be 10%)
Namely: RB establishment frequency (VS. AttRBSetup) > E & RB establishment Success Rate (RBSETUP Success Rate)/RB establishment frequency (VS. AttRBSetup) < F in cell
Wherein, the number of successful RB establishment times in the cell can be obtained by the method described in (5) in embodiment one; the number of RB establishment in a cell can be obtained by the method described in (4) in embodiment one.
Fourthly, the key performance indexes acquired by the cell comprise: the RB establishment direct retry times and the RB establishment direct retry success times are determined to be dormant cells in the following process:
and when the following conditions are met, determining the cell as a dormant cell.
The number of times of successful direct retry establishment of the RB (from DCH to HS-DSCH) in the cell in the pre-detection period is greater than a preset sixth threshold (the sixth threshold is the same as the fourth threshold E, for example, the default value may be 10), and the success rate of direct retry establishment of the RB (from DCH to HS-DSCH) in the cell is less than a preset seventh threshold (the seventh threshold is the same as the fifth threshold F, for example, the default value may be 10%).
Namely: drd.rb.d.d2h.attin > E & & RB direct retry success rate (RB DRD successful rate) ═ vs.drd.rb.d.d.d.h.succin/vs.drd.rb.d.h.attin < F
Wherein, the number of RRC connection establishment can be obtained by the method described in (3) in embodiment one; the RB setup direct retry number can be obtained by the method described in (6) in example one; the number of times of RB setup direct retry success can be obtained by the method described in (7) in example one.
And when the cell is determined to be the dormant cell, generating dormant cell alarm, and writing the judged reason in the dormant cell alarm reason list.
And if the cell which is determined to be SLC does not meet the SLC condition within the set time period, performing recovery analysis on the cell according to the alarm reason.
Analysis time period: 0:00 to 2:00 and 06:00 to 24:00 (modifiable by client configuration) per day
The specific analysis process is as follows:
1. if the SLC alarm reason in the time period set by the cell is as follows: the number of RRC attempts, the duration of the cell unavailable state, or the RRC establishment success rate, the RNC determines that the number of RRC attempts in the time period is greater than an eighth threshold G (for example, the default value may be 10), and the RRC establishment success rate is greater than a ninth threshold H (for example, the default value may be 80%),
the SLC recovery condition is considered satisfied.
2. If the SLC alarm is caused by the RB establishment success rate in the set time period, the RNC determines that the number of RB establishment attempts in the time period is greater than a fourth threshold E (for example, the default value may be 10), and the RB establishment success rate is greater than a tenth threshold I (for example, the default value may be 80%), and then it is determined that the SLC recovery condition is satisfied.
3. If the SLC alarm is caused by the RB direct retry success rate in the set time period, the number of D2H DRD attempts is greater than the fourth threshold E (for example, the default value may be 10) and the RB DRD success rate is greater than the tenth threshold I (for example, the default value may be 80%) in the set time period, and it is determined that the SLC recovery condition is satisfied.
If the cell is judged to be SLC, judging the relevant conditions, and if all the relevant conditions are met, considering that the cell meets the recovery conditions, filling recovery in a reason list of the corresponding time of the cell, and not performing SLC recovery analysis.
Wherein: the threshold B, C, D, E, F, G, H, I may be preset by the system, and when the detection environment of the cell changes, the threshold involved in the preset KPI condition of the sleeping cell is modified to adapt to a wider application scenario.
When the dormant cell is detected, all key performance indexes related to access are taken into consideration, so that the limitation of dormant cell detection is avoided, and the detection is more accurate; in addition, the threshold value involved in the KPI condition of the dormant cell can be modified to adapt to the detection of the dormant cell in different traffic model scenes, and the expandability is strong.
Referring to fig. 8, a schematic diagram of an apparatus for detecting a dormant cell according to another embodiment of the present invention is provided, where the apparatus includes:
an obtaining unit 201 is configured to obtain a key performance indicator KPI related to user access in a cell.
A detecting unit 202, configured to determine whether the cell is a dormant cell by detecting whether the KPI acquired by the acquiring unit 201 meets a preset dormant cell KPI condition.
And an alarm generating unit 203, configured to generate a dormant cell alarm when the detection result of the detecting unit 202 is that the cell is a dormant cell. The alarm includes: and (4) relevant indexes of the detection period before the dormant cell and all the detection periods after the dormant cell.
In this embodiment, the KPI includes: when the cell unavailable state duration and the number of times of the radio resource control RRC connection request message initiated in the cell, the detecting unit 202 includes:
and the storage unit is used for storing the local historical key performance index acquired by the acquisition unit 201. For example, the historical key performance indicators of the local area over the last period of time (e.g., one month) are saved. The maximum capacity of the storage unit 205 depends on the disk storage space, and the minimum storage capacity is required to be able to hold 2 weeks.
The first detecting subunit is configured to detect that a cell unavailability state duration is equal to 0, a difference between the number of times of the RRC connection request message initiated in the cell in the current detection period and the previous detection period acquired from the storage unit is greater than a preset second threshold, and when the number of times of the RRC connection request message initiated in the cell in the previous detection period is greater than the first threshold, determine that the cell is a dormant cell. Or,
the second detection subunit is used for detecting that the duration of the cell unavailable state is equal to 0; and when the number of times of RRC connection establishment initiated in the cell is 0 in a plurality of consecutive detection periods (which may be a preset time period), determining that the cell is a dormant cell.
In this embodiment, the KPI includes: when the number of RRC connection request messages and the number of RRC connection establishment succeeds, the detecting unit 202 includes:
a third detecting subunit, configured to detect that a number of times of initiating an RRC connection request message in the cell in a current detection period is greater than or equal to a preset first threshold, and when a success rate of RRC connection establishment in the cell is less than a preset third threshold, determine that the cell is a dormant cell;
wherein, the RRC connection establishment success rate is the number of times of RRC connection establishment success/the number of times of the RRC connection request message.
In this embodiment, the KPI includes: when the number of successful RB establishment times and the number of RB establishment times of the radio bearer are determined, the detecting unit 202 includes:
a fourth detecting subunit, configured to detect that the number of times for establishing an RB in the cell in the current detection period is greater than a preset fourth threshold, and when a success rate of establishing the RB in the cell is smaller than a preset fifth threshold, determine that the cell is a dormant cell;
wherein, the RB establishment success rate is RB establishment success times/RB establishment times.
In this embodiment, the KPI includes: when the number of RB setup direct retries and the number of successful RB setup direct retries are counted, the detecting unit 202 includes:
a fifth detecting subunit, configured to detect that the number of times of direct retry of RB setup in the cell in the current period is greater than a preset sixth threshold, and a success rate of direct retry of RB setup in the cell is smaller than a preset seventh threshold;
wherein, the RB establishment direct retry success rate is equal to the RB establishment direct retry success times/the RB establishment direct retry times.
Referring to fig. 9, a schematic diagram of an apparatus for detecting a dormant cell according to another embodiment of the present invention is provided, and with respect to the embodiment shown in fig. 8, the apparatus may further include:
a recovery analysis unit 301, configured to, after the detection unit 202 detects that the detected cell belongs to the dormant cell, analyze whether the KPI of the cell meets a set dormant cell recovery threshold in a set time period, and if the detection result is yes, determine that the cell has recovered.
A threshold updating unit 302, configured to update a threshold involved in a preset dormant cell KPI condition when a detection environment of the cell changes, so that the detecting unit 202 performs dormant cell detection according to the modified threshold.
In this embodiment, the set recovery conditions are as follows:
condition 1: if the reason value of SLC in a certain time period of the cell is RRC TIMES, NO RRCTIMES, RRC SETUP SUCCES S RATE
Judging whether the cell recovers, the following 2 conditions need to be satisfied simultaneously:
1. the number of RRC attempts in the current time period is greater than a threshold G (e.g., the default value may be 10)
RRC establishment success rate is greater than a threshold H (e.g., default value may be 80%)
When the above 2 conditions are simultaneously satisfied, the SLC recovery condition is considered satisfied.
Condition 2: if the reason for the cell being judged to be SLC within a certain time period is RB SETUP SUCCESSRATE
Judging whether the cell recovers, and meeting the following 1 condition:
1. the number of RB establishment attempts during the period is greater than a threshold E (e.g., default value may be 10) and the RB establishment success rate is greater than a threshold I (e.g., default value may be 80%).
When condition 2 is satisfied, the SLC recovery condition is considered satisfied.
Condition 3: the reason for the cell being judged to be SLC for a certain period of time is radio bearer direct retry SUCCESS RATE (RB DRD successful).
Judging whether the cell recovers, the following 1 condition needs to be satisfied:
1. during the period, the number of DRD attempts of D2H is greater than a threshold E (for example, the default value may be 10) and the RB DRD success rate is greater than a threshold I (for example, the default value may be 80%)
When condition 3 is satisfied, the SLC recovery condition is considered satisfied.
If there are various reasons why a cell is judged to be SLC, the judgment of the relevant condition is necessary. Only if all relevant conditions are met is the cell considered to initially meet the recovery condition.
If the SLC recovery condition is satisfied for N consecutive hours (N is a positive integer), the cell is considered to have recovered to normal. Once recovery is deemed, SLC recovery analysis will not be performed.
The threshold can be preset by the system, and can also be opened for maintenance personnel to modify, so that application flexibility is provided, and the method is suitable for wider scenes.
The above embodiments can show that, when detecting a dormant cell, whether the cell is a dormant cell is judged through a plurality of KPI combinations, so that the detection is more accurate; differential detection is adopted, and historical KPI is combined in the detection process, so that the detection accuracy is further improved; in addition, the threshold involved in the detection algorithm is modified, so that the detection method can be suitable for detecting dormant cells in different traffic model scenes, and the expandability is strong.
The detection algorithm of the dormant cell is substituted by replacing the KPI similar to the KPI provided by the embodiment of the invention, and the detection algorithm can also be suitable for detecting the dormant cell of a GSM (Global System for Mobile Communications), a CDMA (Code Division Multiple Access) System and an LTE (Long Term Evolution) System.
In addition, an embodiment of the present invention further provides a system for detecting a dormant cell, including any one or a combination of the apparatuses shown in fig. 8 to fig. 9.
Those skilled in the art will appreciate that all or part of the steps in the above embodiments may be implemented by hardware instructions related to a program, and the program may be stored in a computer readable storage medium.
The storage medium may be a magnetic disk, an optical disk, a Read-only Memory (ROM), a Random Access Memory (RAM), or the like.
The above embodiments of the present invention are described in detail, and the principle and the implementation of the present invention are explained by applying specific embodiments, and the above description of the embodiments is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (13)
1. A method for detecting a dormant cell, the method comprising:
acquiring key performance indicators KPI related to user access in a cell;
if the KPI obtained by detection meets the KPI condition of a preset dormant cell, determining the cell as the dormant cell;
if the cell is determined to be a dormant cell, generating a dormant cell alarm;
and detecting whether the KPI of the cell meets a set dormant cell recovery threshold, and if so, judging that the cell is recovered.
2. The method of claim 1,
the KPI comprises: a cell unavailable state duration and a number of times of Radio Resource Control (RRC) connection request messages initiated in the cell;
the acquired KPI meets the preset KPI condition of the dormant cell, and the method comprises the following steps:
the cell unavailable state duration is equal to 0; and
the frequency of RRC connection request messages initiated in the cell in the current detection period is less than or equal to a preset first threshold; and
the difference between the times of initiating RRC connection request messages in the cell in the current detection period and the previous detection period is larger than a preset second threshold, and the times of initiating RRC connection request messages in the cell in the previous detection period is larger than the first threshold;
or,
the acquired KPI meets the preset KPI condition of the dormant cell, and the method comprises the following steps:
the cell unavailable state duration is equal to 0; and
the number of times of RRC connection establishment initiated in the cell in a plurality of continuous detection periods is 0.
3. The method of claim 1,
the KPI comprises: the times of the RRC connection request message and the times of the successful establishment of the RRC connection;
the acquired KPI meets the preset KPI condition of the dormant cell, and the method comprises the following steps:
the frequency of RRC connection request messages initiated in the cell in the current detection period is greater than or equal to a preset first threshold; and
the success rate of RRC connection establishment in the cell is smaller than a preset third threshold;
wherein, the RRC connection establishment success rate is the number of times of RRC connection establishment success/the number of times of the RRC connection request message.
4. The method of claim 1,
the KPI comprises: the successful times of radio bearer RB establishment and the times of RB establishment;
the acquired KPI meets the preset KPI condition of the dormant cell, and the method comprises the following steps:
the frequency of establishing the RB in the cell in the current detection period is greater than a preset fourth threshold, and the success rate of establishing the RB in the cell is less than a preset fifth threshold;
wherein, the RB establishment success rate is RB establishment success times/RB establishment times.
5. The method of claim 1,
the KPI comprises: the RB establishment direct retry times and the RB establishment direct retry success times;
the acquired KPI meets the preset KPI condition of the dormant cell, and the method comprises the following steps:
the RB establishment direct retry times in the cell in the current detection period are larger than a preset sixth threshold, and the RB establishment direct retry success rate in the cell is smaller than a preset seventh threshold;
wherein, the RB establishment direct retry success rate is equal to the RB establishment direct retry success times/the RB establishment direct retry times.
6. The method according to any one of claims 1 to 5, further comprising:
updating thresholds involved in a preset dormant cell KPI condition when the detection environment of the cell changes.
7. An apparatus for detecting a dormant cell, the apparatus comprising:
an obtaining unit, configured to obtain a key performance indicator KPI related to user access in a cell;
the detection unit is used for determining whether the cell is a dormant cell or not by detecting whether the acquired KPI meets the KPI condition of a preset dormant cell;
the alarm generating unit is used for generating a dormant cell alarm when the detection result of the detecting unit is that the cell is a dormant cell;
and the recovery analysis unit is used for analyzing whether the KPI of the cell meets a set dormant cell recovery threshold or not, and if the detection result is yes, judging that the cell is recovered.
8. The apparatus of claim 7,
the KPI comprises: a cell unavailable state duration and a number of times of Radio Resource Control (RRC) connection request messages initiated in the cell;
the detection unit includes:
the storage unit is used for storing local historical key performance indexes;
a first detecting subunit, configured to detect that a cell unavailable state duration is equal to 0, and a difference between a current detection period and a number of times of an RRC connection request message initiated in the cell in a previous detection period acquired from the storage unit is greater than a preset second threshold, and when the number of times of the RRC connection request message initiated in the cell in the previous detection period is greater than the first threshold, determine that the cell is a dormant cell; or,
the second detection subunit is used for detecting that the duration of the cell unavailable state is equal to 0; and when the times of RRC connection establishment initiated in the cell in a plurality of continuous detection periods are all 0, determining that the cell is a dormant cell.
9. The apparatus of claim 7,
the KPI comprises: the times of the RRC connection request message and the times of the successful establishment of the RRC connection;
the detection unit includes:
a third detecting subunit, configured to detect that a number of times of initiating an RRC connection request message in the cell in a current detection period is greater than or equal to a preset first threshold, and when a success rate of RRC connection establishment in the cell is less than a preset third threshold, determine that the cell is a dormant cell;
wherein, the RRC connection establishment success rate is the number of times of RRC connection establishment success/the number of times of the RRC connection request message.
10. The apparatus of claim 7,
the KPI comprises: the successful times of radio bearer RB establishment and the times of RB establishment;
the detection unit includes:
a fourth detecting subunit, configured to detect that the number of times for establishing an RB in the cell in the current detection period is greater than a preset fourth threshold, and when a success rate of establishing the RB in the cell is smaller than a preset fifth threshold, determine that the cell is a dormant cell;
wherein, the RB establishment success rate is RB establishment success times/RB establishment times.
11. The apparatus of claim 7,
the KPI comprises: the RB establishment direct retry times and the RB establishment direct retry success times;
the detection unit includes:
a fifth detecting subunit, configured to detect that the number of times of direct retry of RB setup in the cell in the current period is greater than a preset sixth threshold, and a success rate of direct retry of RB setup in the cell is smaller than a preset seventh threshold;
wherein, the RB establishment direct retry success rate is equal to the RB establishment direct retry success times/the RB establishment direct retry times.
12. The apparatus of claims 7 to 11, further comprising:
and the threshold updating unit is used for updating the threshold related in the preset KPI condition of the dormant cell when the detection environment of the cell changes.
13. A dormant cell detection system comprising the apparatus of any one of claims 7 to 12.
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| CN103945506A (en) * | 2013-01-21 | 2014-07-23 | 中兴通讯股份有限公司 | Method of realizing coverage compensation, device and system |
| DE112013006729T5 (en) * | 2013-02-25 | 2015-11-12 | Broadcom Corporation | Detect dormant cell and report configuration |
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