Multicast Reception Status Feedback for Unicast-Multicast Switching
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Solution Overview
Problem
Existing multicast and broadcast services in wireless communication systems lack efficient mechanisms for dynamic mode switching between unicast and multicast transmission, leading to service interruptions and suboptimal resource utilization, particularly in scenarios requiring high reliability and power efficiency.
Innovation Solution
Implementing techniques that enable user equipment (UE) to report reception status metrics such as packet loss rate, block error rate, and channel state information to the network, allowing for dynamic adjustment of transmission modes (PTP/PTM) to enhance service reliability and resource efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multicast transmission mode is used, then resource utilization is improved, but service reliability deteriorates due to lack of feedback mechanism
Solution Approach 1:
The patent implements a feedback mechanism where UEs report reception status (success/failure) for multicast transmissions back to the network. This allows the network to dynamically switch between multicast and unicast modes based on actual reception conditions, thereby maintaining high resource utilization while ensuring service reliability through adaptive mode selection.
2Reliability
If unicast transmission mode is used, then service reliability is improved, but resource utilization deteriorates
Solution Approach 1:
The patent enables dynamic switching between unicast and multicast transmission modes based on real-time reception status feedback. The network can transition from resource-intensive unicast mode to efficient multicast mode when conditions permit, and vice versa when reliability is compromised, thereby optimizing resource utilization while maintaining service reliability.
3Duration of action of stationary object
If dynamic mode switching is implemented, then service continuity is improved, but system complexity increases
Solution Approach 1:
The patent uses simple reception status feedback from UEs to trigger mode switching decisions. The feedback mechanism itself is straightforward (reporting success or failure), and the switching logic is rule-based, which maintains manageable system complexity while achieving improved service continuity through rapid adaptation to reception conditions.
4Adaptability or versatility
If reception status reporting is enabled, then transmission mode switching is improved, but signaling overhead increases
Solution Approach 1:
The patent implements selective reception status reporting where UEs report only when necessary (e.g., when reception fails or conditions change). This partial reporting approach provides sufficient information for mode switching decisions without requiring continuous full-status reporting, thereby reducing signaling overhead while maintaining effective transmission mode adaptability.
Data Source
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AI summary
Methods, apparatus, and systems that enable reporting of reception status associated with a multicast and broadcast service are disclosed. In one example aspect, a method for wireless communication includes receiving, by a communication device from the network node, configuration information that configures information indicating a reception status of a multicast and broadcast service. Data for the multicast and broadcast service is carried in one or more bearers. The method also includes transmitting, by the communication device, the information indicating the reception status to the network node based on a measurement result.