MBMS Point-to-Multipoint Coverage Adjustment via Uplink Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing MBMS transmission in telecommunication systems like LTE and NR results in inefficient power usage and increased interference due to static coverage configuration, even when no UEs are receiving the service at the cell edge.
Innovation Solution
A method and apparatus for dynamically adjusting the coverage of point-to-multipoint channels by monitoring uplink channels for abnormal receptions, using timers, and adjusting transmission power and modulation and coding schemes based on feedback from user equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If static coverage configuration is used for MBMS transmission, then coverage stability is maintained, but power efficiency deteriorates due to continuous transmission even when no UEs are receiving at cell edge
Solution Approach 1:
The patent implements dynamic coverage adjustment by transitioning from static to adaptive coverage configuration. The base station monitors uplink channels for abnormal reception indications and adjusts downlink coverage accordingly, making the system responsive to actual UE reception conditions rather than maintaining fixed coverage boundaries
Solution Approach 2:
The patent establishes a feedback loop where UEs monitor downlink MBMS channels and send abnormal reception indications back to the base station via uplink channels. This feedback mechanism enables the base station to detect coverage issues and adjust transmission parameters dynamically, resolving the contradiction between stable coverage and power efficiency
2Device complexity
If static coverage configuration is used for MBMS transmission, then system complexity is reduced, but interference increases due to unnecessary transmissions at cell edge
Solution Approach 1:
The feedback mechanism allows the base station to detect when UEs are experiencing abnormal reception and adjust coverage boundaries dynamically. By suppressing transmissions in areas where UEs cannot receive properly, the system reduces interference without requiring complex additional hardware or infrastructure
Solution Approach 2:
The patent changes transmission parameters dynamically by adjusting coverage configuration based on monitored abnormal reception indications. This allows the system to adapt transmission characteristics to actual conditions, reducing unnecessary interference while maintaining manageable system complexity through parameter adjustment rather than structural complexity
3Loss of energy
If coverage is reduced based on abnormal reception monitoring, then power efficiency is improved, but measurement precision requirements increase for detecting abnormal reception
Solution Approach 1:
The system uses the UE's own reception capability to generate feedback about coverage quality. Each UE monitors its own ability to receive MBMS data and reports abnormal reception conditions, eliminating the need for complex external measurement systems while maintaining accurate coverage detection
Solution Approach 2:
The feedback loop provides continuous information about actual reception conditions at the cell edge. By using this feedback from multiple UEs, the base station can make accurate coverage decisions without requiring individual UEs to perform complex measurements, distributing the measurement burden across the network
4Productivity
If dynamic coverage adjustment is implemented, then resource utilization is improved, but device complexity increases due to monitoring and adjustment mechanisms
Solution Approach 1:
The patent reuses existing uplink and downlink channels for their primary purposes while adding the coverage adjustment function. The same uplink control channels used for general UE communications carry abnormal reception indications, and the same downlink channels carry MBMS data whose coverage is being adjusted, avoiding the need for dedicated monitoring and adjustment infrastructure
Solution Approach 2:
The system uses the existing communication infrastructure to perform monitoring and adjustment functions. UEs that are already receiving MBMS services simultaneously provide coverage feedback, and the base station uses its existing transmission control capabilities to adjust coverage, eliminating the need for separate dedicated monitoring devices or complex adjustment mechanisms
Data Source
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.