MBMS Coverage Adjustment Using UE Feedback to Reduce Interference
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Solution Overview
Problem
Existing MBMS transmission in telecommunication systems like LTE and NR often results in wasted power and interference due to static coverage configuration, even when no UEs are receiving the service at the cell edge.
Innovation Solution
A dynamic adjustment mechanism where base stations and UEs exchange feedback on reception status, allowing the base station to adjust transmission power and modulation and coding schemes based on UE feedback to optimize coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If static coverage configuration is used for MBMS transmission, then coverage area is ensured, but transmission power is wasted and interference increases
Solution Approach 1:
The patent implements dynamic coverage configuration by allowing base stations to adjust MBMS transmission parameters (such as resource allocation, power levels, and modulation schemes) based on real-time feedback from UEs. This transforms the static coverage configuration into a dynamic system that adapts to actual reception conditions, reducing power waste while maintaining necessary coverage areas.
Solution Approach 2:
The patent introduces a feedback mechanism where UEs monitor reception quality (e.g., RSRP, SINR, packet error rates) and report abnormal reception conditions to the base station. The base station uses this feedback information to adjust transmission parameters, creating a closed-loop control system that optimizes power usage based on actual network conditions and UE distribution.
2Reliability
If coverage is extended to cell edge UEs, then service availability is improved, but interference increases when no UEs are present
Solution Approach 1:
The patent enables local quality adjustment by allowing different transmission parameters to be applied to different geographic areas or UE groups within the cell. Base stations can optimize transmission for specific regions where UEs are actually present, rather than uniformly extending coverage to the entire cell edge, thereby reducing unnecessary interference in areas without active users.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting transmission parameters (power, modulation, coding rate, resource blocks) based on feedback from UEs. When UEs report good reception conditions, the base station can reduce power or use higher-order modulation, thereby maintaining service availability while reducing interference and power consumption.
3Productivity
If UE feedback mechanism is implemented, then transmission optimization is achieved, but system complexity increases
Solution Approach 1:
The patent applies partial action by implementing feedback only when necessary - specifically when UEs detect abnormal reception conditions. Rather than requiring continuous feedback from all UEs, the system triggers feedback only for UEs experiencing issues or at specific monitoring intervals, reducing signaling overhead and system complexity while maintaining transmission optimization benefits.
Data Source
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AI summary
Disclosed are methods for adjusting cell coverage of a multimedia broadcast multicast service. An example method (700) may include transmitting (701) data of a multimedia broadcast multicast service on a point-to-multipoint channel, monitoring (702) an uplink channel for information on an abnormal reception of the data, and adjusting (703) coverage of the point-to-multipoint channel based on the monitoring. Related apparatuses and computer readable media are also disclosed.