MBSFN Measurement Logging With Time and Location Correlation
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Solution Overview
Problem
Current communication systems lack complete measurement definitions for multicast-broadcast single-frequency network (MBSFN) reception, particularly in terms of UE geographical location, signal verification, and MBSFN area planning, which are essential for accurate logging and reporting of MBSFN measurements.
Innovation Solution
The proposed solution involves logging the latest MBSFN measurement results prior to the end of the logging period, associating them with time information, and ensuring accurate location information is collected and validated at the time of measurement, with additional logging details such as measurement period length and correlation of results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If logging periodicity is set to a long duration (e.g., 61s), then the logging overhead is reduced, but the measurement results become outdated and less accurate for MBSFN reception verification
Solution Approach 1:
The patent implements dynamic logging periodicity adjustment based on MBSFN reception conditions. When MBSFN signals are detected, the logging periodicity is reduced to capture timely measurements. When MBSFN signals are not present, the periodicity is increased to reduce overhead. This dynamic adaptation resolves the contradiction between logging efficiency and measurement accuracy.
Solution Approach 2:
The system changes the logging periodicity parameter dynamically based on detected MBSFN reception conditions. The network can configure different logging periodicities (e.g., 1s, 61s) and the UE adapts the actual logging interval based on whether MBSFN signals are present, thereby optimizing both efficiency and accuracy according to real-time conditions.
2Reliability
If the UE monitors MCCH channel regularly for MBSFN information, then it can detect MBSFN transmission opportunities, but the irregular and discontinuous nature of MBSFN transmission impacts measurement consistency
Solution Approach 1:
The UE performs preliminary actions by continuously monitoring the MCCH channel for MBSFN configuration information and transmission opportunities. This preliminary monitoring enables the UE to identify when MBSFN signals are present and prepare for measurements accordingly, ensuring reliable detection while managing the inherent irregularity of MBSFN transmission through proper timing alignment.
3Use of energy by moving object
If measurements are taken only in sub-frames where UE is decoding PMCH, then measurement resources are optimized, but the measurement coverage is limited and may miss important MBSFN area signal conditions
Solution Approach 1:
The patent segments measurement activities into different types: PMCH-related measurements taken during active decoding sub-frames, and additional MBSFN area measurements taken at other opportunities. This segmentation allows the system to maintain energy efficiency for critical measurements while expanding coverage through supplementary measurements in non-PMCH sub-frames, capturing comprehensive MBSFN area signal conditions.
Data Source
AI summary
Various communication systems may benefit from the appropriate logging of measurements. For example, communication systems employing multimedia broadcast multicast service may benefit from logging multicast-broadcast single-frequency network measurements. A method can include logging, by a user equipment, a multicast-broadcast single-frequency network measurement corresponding to a logging period. The method can also include storing, at the time the multicast-broadcast single-frequency network measurement is made, cell measurement results.