Base station interface disconnection signaling storm prevention and control method based on terminal classification statistics

Abstract

The present invention discloses a base station interface link-off signaling storm prevention and control method based on terminal classification statistics, which has good security. The base station interface link-off signaling storm prevention and control method of the present invention comprises the following steps: (10) signaling storm parameter calculation: when a base station interface link failure is detected, the peak value and average value of the signaling storm that may be caused by the link failure are calculated; (20) affected terminal set determination: according to the cell and operator carried by the faulty link, the terminal set affected by the link failure is determined; (30) terminal classification calibration: the affected terminals are classified and the terminal types are calibrated; (40) terminal classification statistics: the number of terminals of various types is counted; (50) neighboring area relationship acquisition: according to the base station configuration parameters, the available neighboring area relationship is acquired; (60) optimal defense strategy selection: the optimal active defense strategy is selected to prevent and control the signaling storm.

Description

Technical Field

[0001] The present invention belongs to the field of 5G communication technology, and in particular to a method for preventing and controlling a base station interface disconnection signaling storm based on terminal classification statistics. Background Art

[0002] A network signaling storm refers to a situation in which the signaling received by a network element exceeds the processing capacity of the network element in a short period of time, causing network congestion or even downtime, which further leads to network paralysis. Nowadays, the popularity of smart terminals is increasing, and the utilization rate of terminals is also increasing. Any network storm will have a great impact on operators and users.

[0003] The existing network equipment is unable to keep up with the growing network load requirements for signaling storms caused by faults, both at the 3GPP protocol level and at the implementation level. Especially for occasional network faults, such as NG interface disconnection, signaling storms are caused by passive defense methods of network elements in the existing technology, lacking active avoidance solutions, which may cause secondary disasters.

[0004] In summary, the problem with the prior art is that there is a lack of active defense solutions for situations where the base station releases UEs in a centralized manner due to a NG interface disconnection failure, thereby triggering a signaling storm. Summary of the invention

[0005] The purpose of the present invention is to provide a base station interface disconnection signaling storm prevention and control method based on terminal classification statistics, which has good security.

[0006] The technical solution to achieve the purpose of the present invention is:

[0007] A method for preventing and controlling a base station interface disconnection signaling storm based on terminal classification statistics comprises the following steps:

[0008] (10) Signaling storm parameter calculation: When a base station interface link failure is detected, the peak and average values ​​of the signaling storm that may be caused by the link failure are calculated;

[0009] (20) Determine the affected terminal set: Determine the terminal set affected by the link failure based on the cells and operators carried by the failed link;

[0010] (30) Terminal classification and labeling: The affected terminals are classified according to their current status, service type, and DRB nature, and each terminal type is labeled;

[0011] (40) Terminal classification statistics: count the number of terminals of various types;

[0012] (50) Neighboring cell relationship acquisition: obtaining available neighboring cell relationships according to base station configuration parameters;

[0013] (60) Optimal defense strategy selection: Based on the frequency of the current base station and the relationship between neighboring cells, combined with the terminal's calibration type and available active defense strategies, the optimal active defense strategy is selected to prevent and control signaling storms.

[0014] Compared with the prior art, the present invention has the following significant advantages:

[0015] Good safety performance: Based on the classification statistics of UE types, the present invention actively defends against signaling storms caused by NG interface link failures, and has good safety.

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the main flow chart of the base station interface disconnection signaling storm prevention and control method based on terminal classification statistics of the present invention.

[0018] Figure 2 This is an example diagram of terminal classification.

[0019] Figure 3 yes Figure 1 Flowchart of the steps for selecting the optimal defense strategy in . DETAILED DESCRIPTION

[0020] like Figure 1 As shown, the present invention provides a method for preventing and controlling a base station interface disconnection signaling storm based on terminal classification statistics, comprising the following steps:

[0021] (10) Signaling storm parameter calculation: When a base station interface link failure is detected, the peak and average values ​​of the signaling storm that may be caused by the link failure are calculated;

[0022] The estimation method needs to consider the operators and cells involved in the current link, and exclude unaffected cell UEs. On this basis, according to the existing 3GPP protocol standards, when estimating the signaling storm that may be caused, it is necessary to consider the signaling caused by the release of the UE and the air interface signaling caused by the UE's re-access after the release. When calculating the peak value, it is necessary to consider the number of air interface signalings that all affected UEs re-initiate access within the T300 timer after the release; calculating the mean value requires considering the air interface signaling brought by all active UEs after initiating re-access, and averaging the number of signalings per second.

[0023] (20) Determine the affected terminal set: Determine the terminal set affected by the link failure based on the cells and operators carried by the failed link;

[0024] (30) Terminal classification and labeling: The affected terminals are classified according to their current status, service type, and DRB nature, and each terminal type is labeled;

[0025] Terminal classification examples are as follows Figure 2 shown.

[0026] Preferably, the terminals can be classified as follows:

[0027] The current state includes: idle state, active state, inactive state, central user, and edge user;

[0028] The service types include: voice service and non-voice service;

[0029] The DRB properties are properties of the DRB currently established by the terminal, including: response mode DRB and non-response mode DRB.

[0030] (40) Terminal classification statistics: count the number of terminals of various types;

[0031] (50) Neighboring cell relationship acquisition: obtaining available neighboring cell relationships according to base station configuration parameters;

[0032] (60) Optimal defense strategy selection: Based on the frequency of the current base station and the relationship between neighboring cells, combined with the terminal's calibration type and available active defense strategies, the optimal active defense strategy is selected to prevent and control signaling storms.

[0033] like Figure 3 As shown, the (60) optimal defense strategy selection step includes:

[0034] (61) Low storm potential terminal release: If the current number of users is not high or the number of affected users is small, and the signaling storm caused by the evaluation is likely to be low, all UEs are released and wait for them to reconnect; otherwise, go to step (62);

[0035] The current number of users is not high, and is determined according to the number of users currently in an RRC connected state of the base station;

[0036] The number of affected users is small, and is determined based on the number of UEs in the RRC connected state affected by the faulty NG link on the current base station;

[0037] ,The threshold here can be determined by combining hardware capabilities and signaling peak values. Usually, the number of users does not exceed 30% of the maximum capacity, and the CPU occupancy rate does not exceed about 50%.

[0038] The signaling storm caused may be low, and is determined by estimating the number of RRC signaling generated by the immediate access after the users are released, based on the number of affected users mentioned above;

[0039] (62) Idle terminal release: For inactive UEs and idle UEs, they are marked as the lowest priority and are released directly or not according to the current load;

[0040] According to the current load, the selection of direct release or non-release means:

[0041] When the load is low (the load can refer to the number of users and CPU load mentioned above), directly release the inactive or idle UEs;

[0042] When the load is high, inactive or idle UEs are not released;

[0043] (63) Release of UEs with no target neighboring service: For UEs that are determined to have no target neighboring service and are in service, they are released with the highest priority.

[0044] (64) Blind handover of a terminal in a target neighboring cell: If a target neighboring cell is determined and the UE is performing an answering mode service or a service with a higher priority, the UE is blindly handed over to the neighboring cell;

[0045] (65) Redirection of low-priority terminals in a target neighboring cell: If a target neighboring cell is determined to exist but the service priority of the UE is not high, it can be redirected to the target neighboring cell.

Claims

1. A method for preventing and controlling base station interface disconnection signaling storm based on terminal classification statistics, characterized in that: The steps include: (10) Signaling storm parameter calculation: When a base station interface link failure is detected, calculate the peak and average values ​​of the signaling storm that may be caused by the link failure; (20) Determine the affected terminal set: Determine the terminal set affected by the link failure based on the cells and operators carried by the failed link; (30) Terminal classification and labeling: The affected terminals are classified according to their current status, service type and DRB nature, and each terminal type is labeled; (40) Terminal classification statistics: statistics on the number of terminals of various types; (50) Neighboring cell relationship acquisition: Obtain available neighboring cell relationships based on base station configuration parameters; (60) Optimal defense strategy selection: Based on the frequency point and neighboring cell relationship of the current base station, combined with the terminal's calibration type and available active defense strategies, the optimal active defense strategy is selected to prevent and control signaling storms; The (60) optimal defense strategy selection step includes: (61) Low storm potential terminal release: If the current number of users is not high or the number of affected users is small, and the signaling storm caused by the evaluation is likely to be low, all UEs are released and wait for them to reconnect; otherwise, go to step (62); (62) Idle terminal release: For inactive UEs and idle UEs, they are marked as the lowest priority and are released directly or not according to the current load; (63) Release of UEs with no target neighboring service: For UEs that are determined to have no target neighboring service and are in service, they are released with the highest priority. (64) Blind handover of a terminal in a target neighboring cell: If a target neighboring cell is determined and the UE is performing an answering mode service or a service with a higher priority, the UE is blindly handed over to the neighboring cell; (65) Redirection of low-priority terminals to a target neighboring cell: If a target neighboring cell is determined but the service priority of the UE is not high, it can be redirected to the target neighboring cell.

2. The base station interface disconnection signaling storm prevention and control method according to claim 1 is characterized in that: The current state includes: idle state, active state, inactive state, central user, and edge user; The service types include: voice service and non-voice service; The DRB properties are properties of the DRB currently established by the terminal, including: response mode DRB and non-response mode DRB.

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