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Handover parameter optimization method and system

A technology of switching parameters and optimization methods, applied in wireless communication, electrical components, etc., can solve the problems of slow optimization speed, low self-optimization performance, and low accuracy, and achieve the effect of improving optimization speed and self-optimizing performance.

Inactive Publication Date: 2012-08-15
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the strategy for the self-optimization of handover parameters is usually that after the failure in the cell is determined, the Operation Administration and Maintenance (OAM) center revises the relevant parameters according to the type of failure, and usually adopts a step-by-step revision strategy Mode that tries parameter by parameter sequentially, so optimization is slower, less accurate, and thus less self-optimizing

Method used

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  • Handover parameter optimization method and system
  • Handover parameter optimization method and system
  • Handover parameter optimization method and system

Examples

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Embodiment 1

[0056] This embodiment describes the scenario where the UE handover is too late, and the mobile process of the UE in the network is as follows: figure 2 As shown, in the figure, the UE moves from the source cell A to the target cell B, and RLF occurs at the location where the UE is located.

[0057] This embodiment mainly includes the following steps:

[0058] 11) RLF occurs when the UE is handed over from cell A to cell B;

[0059] 12) The handover measurement quantity in the current cell A is RSRP, so the cell A calls out the cumulative density function curve CDF (RSRP) obtained by the measurement quantity RSRP reported by the UE history in the handover area of ​​this cell;

[0060] 13) According to the wireless scene of the current cell, according to the threshold setting of the wireless link failure in the protocol specification, the RSRP threshold value RLFthrd_A (RSRP) during RLF in the wireless environment of the cell is obtained;

[0061] 14) Contrast curve CDF(RSRP...

Embodiment 2

[0067] This embodiment describes the scenario where the UE is handed over too early. The mobile process of the UE in the network is as follows: Figure 4 As shown, when the UE moves in the source cell A, it satisfies the measurement conditions and reports the target cell B, so the cell A initiates the handover process of the UE from cell A to cell B according to the measurement report of the UE, but the UE has just completed When switching to cell B, RLF occurs, and the cell returns to cell A after another cell reselection.

[0068] This embodiment mainly includes the following steps:

[0069] 21) RLF occurs after the UE is handed over from cell A to cell B;

[0070] 22) Cell B judges from the UE's re-establishment message that the UE has a premature handover fault in cell A, and then informs cell A of the premature handover fault in cell A through the HANDOVER REPORT message on the X2 port;

[0071] 23) The handover measurement quantity issued by cell A is RSRP, and UE has ...

Embodiment 3

[0077] This embodiment describes the scenario where the UE is handed over to the wrong cell, and the mobile process of the UE in the network is as follows: Image 6 As shown, when the UE moves in the source cell A, it satisfies the measurement conditions and reports the target cell B, so the cell A initiates the handover process of the UE from cell A to cell B according to the measurement report of the UE, but the UE has just completed In the handover to cell B, RLF occurs, but cell C is accessed when re-accessing the system.

[0078] This embodiment mainly includes the following steps:

[0079] 31) RLF occurs after the UE is handed over from cell A to cell B, and is reestablished in cell C;

[0080] 32) According to the RLF INFORMATION information indicated by the X2 port of the cell C, the cell B judges that the fault that the UE has been handed over to the wrong cell in the cell A occurs, and then informs the cell A of the fault information through the HANDOVER REPORT mess...

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Abstract

The invention discloses a handover parameter optimization method. According to a measurement value reported by user equipment (UE), a network side obtains a cumulative density function CDF (i) of corresponding measured values of a cell handover region, and according to the area of a region enclosed by the cumulative density function curve CDF (i) of corresponding measured values of the cell handover region and a threshold value curve RLFthrd (i) of the measured values, the network side determines the degree of the cell fault when the cell has mobility fault; and according to the fault degree of the cell, the network side revises corresponding handover parameters so as to decrease the area of the region enclosed by the curve RLFthrd (i) and the curve CDF (i). The invention further discloses a handover parameter optimization system correspondingly. On the basis of the statistic result reported by the UE, the parameters needed to be revised and the revision degree of the parameters are determined, thus the optimization speed can be increased, and simultaneously the self-optimization performance can also be improved.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a handover parameter optimization method and system. Background technique [0002] In the LTE system, the number of network parameters is huge, the correlation is strong, and it has high complexity. In addition, the system requires that the configuration and management of newly added base stations require minimal manual intervention, all of which put forward new requirements for the operation and maintenance of the network. In order to solve the above problems, Self-Organizing and Self-Optimization Network (SON) was proposed and considered to be the most effective means to reduce cost and operational complexity. The SON function requires self-configuration, self-optimization, and self-healing. Among them, the self-configuration process means that the newly deployed nodes independently obtain the necessary basic system operation configuration through the "automatic i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/02H04W36/08
CPCH04W24/04H04W36/0079H04W36/008375
Inventor 董玥昕徐云翔
Owner ZTE CORP
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