Beam Information Logging for Wireless Network Optimization
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Solution Overview
Problem
Current wireless communication technologies face limitations in minimizing drive tests, particularly in New Radio (NR) networks, as they restrict measurements to UEs with sufficient uplink coverage and lack detailed location information for Radio Link Failure analysis, hindering comprehensive network optimization and user consent handling.
Innovation Solution
Implementing logged and immediate measurement types for Minimization of Drive Tests (MDT) that include periodic logging of signal strengths and location information, along with user consent mechanisms, to enhance measurement reporting and network optimization in wireless communication networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If normal RRM measurement mechanisms are used, then measurements can be reported when UE has RRC connection and sufficient UL coverage, but this restricts measurements to UEs not experiencing Radio Link Failure and lacking location information
Solution Approach 1:
The patent segments measurement reporting into two distinct modes: Logged MDT for UEs in RRC_IDLE state and Immediate MDT for UEs in RRC_CONNECTED state. This segmentation allows location information to be collected through different mechanisms (MNCSI for idle, GNSS for connected) while maintaining reliable reporting through appropriate state-specific procedures.
Solution Approach 2:
The patent introduces MDT configuration and reporting as an intermediary mechanism between the UE and network. This intermediary enables location information collection through MNCSI measurements in idle state and GNSS measurements in connected state, bridging the gap between UEs with and without sufficient UL coverage.
2Loss of information
If Logged MDT is implemented with periodic logging in RRC_IDLE state, then location information can be collected via MNCSI, but the logging interval and duration increase measurement and processing complexity
Solution Approach 1:
The patent introduces configurable parameters including logging interval (minimum 1.28 seconds), logging duration (minimum 10 minutes), and number of samples per logging interval. These parameter changes allow flexible adjustment of measurement complexity based on network requirements while maintaining systematic location information collection through MNCSI.
3Measurement precision
If Immediate MDT measurements are collected in RRC_CONNECTED state, then detailed location information via GNSS can be obtained, but this requires additional UE processing and power consumption
Solution Approach 1:
The patent implements dynamic measurement collection where the UE transitions between different measurement modes based on RRC state. In RRC_CONNECTED state, GNSS measurements are performed on-demand with configurable reporting triggers, allowing precise location information to be collected only when necessary rather than continuously, thus reducing power consumption.
4Measurement precision
If beam information is included in MDT measurement reports for both serving and neighboring cells, then network optimization accuracy improves, but the report size and processing overhead increase
Solution Approach 1:
The patent applies local quality by differentiating measurement requirements for serving cell versus neighboring cells. For the serving cell, detailed beam information including beam IDs and quality metrics are collected. For neighboring cells, measurements are taken but beam information is selectively reported based on whether they meet threshold criteria, reducing overall data volume while maintaining optimization accuracy for critical cells.
Data Source
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AI summary
Methods to operate a wireless device in a wireless communication network are discussed. Respective signal qualities of a plurality of cells of the wireless communication network are determined (1209). The plurality of cells are ranked (1215) based on the respective signal qualities of the plurality of cells. Measurement information for at least one of the plurality of cells is logged (1225) in memory of the wireless device based on ranking the plurality of cells, wherein the measurement information includes a cell identity and beam information for the at least one of the plurality of cells. A report is transmitted (1239) to the wireless communication network, wherein the report includes the measurement information. Related wireless devices and computer programs are also discussed.