Radio Link Failure Report Filtering in Wireless Networks
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Solution Overview
Problem
Current RLF reporting in wireless communications networks, such as UMTS and LTE, generates excessive data without effective filtering mechanisms, leading to inefficient processing and analysis, especially in centralized self-organized networks (cSON), where not all reports are useful for analysis due to missing information or inappropriate analysis locations.
Innovation Solution
Implementing filtering criteria at the eNB node for RLF reports based on content, including release version, presence of detailed location information, RSRP/RSRP measurement thresholds, carrier frequency, PLMN, and TAI, to determine which reports are forwarded to central entities for processing, thereby reducing unnecessary data transmission and focusing on relevant information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all RLF reports are collected and forwarded to central entities, then complete data availability is achieved, but data transmission volume and processing burden increase excessively
Solution Approach 1:
The patent extracts and removes unnecessary RLF reports from the data stream before forwarding to central entities. By applying filtering criteria at the eNB node, only reports meeting specific conditions (release version, location information presence, measurement thresholds, carrier frequency, PLMN, TAI) are selected for transmission, effectively taking out irrelevant data to reduce overall transmission volume while preserving valuable information.
Solution Approach 2:
The patent implements local quality control by applying different filtering criteria at the eNB node based on the specific characteristics of each RLF report. Instead of uniform collection, the system evaluates each report's quality attributes (such as presence of detailed location information, RSRP/RSRQ measurement values, carrier frequency) and selectively forwards only those with sufficient quality, thereby optimizing the balance between data availability and transmission efficiency.
2Productivity
If filtering criteria are applied at eNB node, then data transmission efficiency improves, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by implementing filtering criteria at the eNB node before reports are forwarded to central entities. This preliminary filtering at the network edge reduces the burden on central processing systems and improves overall efficiency. The eNB node performs initial evaluation of reports against predefined criteria (release version, location information, measurement thresholds, carrier frequency, PLMN, TAI) and pre-processes the data stream, thereby improving productivity despite increased local complexity.
3Loss of information
If RLF reports with missing information are forwarded, then data completeness is maintained, but analysis quality deteriorates
Solution Approach 1:
The patent applies parameter changes by introducing specific filtering criteria that evaluate the quality parameters of each RLF report. Reports are assessed based on presence of detailed location information, RSRP/RSRQ measurement values above thresholds, carrier frequency validity, PLMN correctness, and TAI accuracy. Reports failing to meet these parameter requirements are filtered out, ensuring that only reports with sufficient information quality are forwarded for analysis, thereby improving measurement precision and analysis quality.
Data Source
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AI summary
Embodiments of the invention include a method for collecting RLF data in a wireless network. The method may include receiving, by a first radio access node, RLF data related to a connection failure experienced by a UE. The method may then include determining whether the RLF data satisfies at least one condition and, when it is determined that the RLF data satisfies the at least one condition, sending the RLF data to at least one of a second radio access node and an RLF data collection entity. In one embodiment, the RLF data may be received from a second radio access node or the UE.