UE Logged MBMS Measurement Reporting Logic
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Solution Overview
Problem
There is a need for an efficient method to perform multimedia broadcast multicast service (MBMS) minimization of drive tests (MDT) in wireless communication systems, specifically to manage the reporting of logged MBMS measurement results by user equipment (UE) in a way that balances resource efficiency and reduces unnecessary signaling overhead.
Innovation Solution
A method and apparatus where a UE determines whether to inform the serving cell about logged MBMS measurement results based on specific conditions, including the availability of results and MBMS MDT-related conditions such as memory fullness, threshold exceedance, and timer status, to optimize reporting and reduce frequent signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE reports logged MBMS measurement results frequently to the serving cell, then the network can obtain timely coverage and quality information, but the signaling overhead and resource consumption increase
Solution Approach 1:
The UE dynamically determines whether to report measurement results based on current conditions (memory availability, timer status, threshold comparisons) rather than reporting at fixed intervals. The reporting behavior adapts to the actual state of measurement logging and buffer conditions, optimizing the balance between timeliness and signaling overhead.
Solution Approach 2:
The UE autonomously manages its own measurement result reporting by monitoring its internal buffer status, memory availability, and configured thresholds. The device self-determines when reporting is necessary without requiring continuous network intervention or explicit polling, reducing signaling overhead while ensuring timely reporting when needed.
2Loss of information
If the UE continuously monitors and reports MBMS measurement availability, then the network receives up-to-date measurement data, but the UE power consumption and processing load increase
Solution Approach 1:
The UE employs periodic checking mechanisms with configured timers (e.g., T3206) to monitor measurement logging status and buffer availability. Instead of continuous monitoring, the device checks at periodic intervals defined by network configuration, reducing power consumption while maintaining measurement data availability for reporting when conditions are met.
Solution Approach 2:
The UE autonomously tracks its own measurement logging status, buffer status, and memory availability without requiring continuous network queries. The device self-manages the monitoring process by evaluating its internal state against configured thresholds and conditions, minimizing processing load and power consumption while ensuring measurement information is ready for reporting when needed.
3Loss of information
If the UE reports all logged MBMS measurement results, then complete coverage and quality information is provided to the network, but unnecessary signaling occurs when no new measurements are available
Solution Approach 1:
The UE extracts and reports only the necessary measurement information based on current buffer status and configured conditions. Instead of reporting all previously logged measurements unconditionally, the device selectively reports only those measurements that meet reporting criteria (e.g., memory full condition, threshold exceedance, timer expiration), eliminating unnecessary signaling while maintaining completeness of relevant measurement data.
Solution Approach 2:
The UE uses feedback from its internal buffer status monitoring and condition evaluation to determine reporting behavior. The device continuously assesses whether reporting conditions are met (based on memory availability, threshold comparisons, and timer status) and adjusts its reporting accordingly, ensuring complete reporting when needed while avoiding unnecessary signaling when measurements are not available or conditions are not met.
Data Source
AI summary
A method and apparatus for indicating a logged multimedia broadcast multicast service (MBMS) measurement availability in a wireless communication system is provided. A user equipment (UE) determines whether to inform a serving cell that the UE has logged MBMS measurement results to be reported based on a first condition and a second condition, and when both the first condition and the second condition are met, the UE informs the serving cell that the UE has the logged MBMS measurement results. The first condition corresponds to that the UE 0has the logged MBMS measurement results to be reported. The second condition includes at least one MBMS minimization of drive tests (MDT) related condition.