Multicast Reception Terminal with Dynamic Occasion Configuration
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Solution Overview
Problem
In next-generation radio communication systems like NR, downlink data reception using multicast has not been fully studied, leading to potential system performance degradation and throughput reduction in ultra-high-density and high-traffic environments.
Innovation Solution
A terminal equipped with a receiving section for multicasting and a control section for decoding data, utilizing higher layer signaling to configure reception occasions and spatial relations for efficient multicast PDSCH resource management, reducing DCI overhead through indication methods such as DCI format optimization and specific signal detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If downlink data reception using multicast is implemented in NR systems, then system capacity and throughput are improved, but system performance degradation occurs due to insufficient specification study and improper reception handling
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting reception occasion configurations through higher layer signaling. The base station configures multiple reception occasions with different parameters (time, frequency, spatial relations) and the terminal adapts its reception behavior based on received indications, thereby optimizing multicast reception performance while avoiding system degradation.
Solution Approach 2:
The patent implements dynamics by enabling flexible activation and deactivation of reception occasions. The base station can dynamically indicate which configured reception occasions should be monitored or skipped through DCI or other signals, allowing the system to adapt to varying traffic conditions and maintain optimal performance in ultra-high-density environments.
2Reliability
If multiple reception occasions are configured for multicast data, then data reception reliability is improved, but DCI overhead increases due to need for indication of each occasion
Solution Approach 1:
The patent extracts the indication function from individual DCI messages for each reception occasion. Instead of including reception indication in every DCI, the system separates the configuration (done via higher layer signaling) from the activation/deactivation indication (done via simpler signals), thereby reducing DCI overhead while maintaining reliable data reception across multiple occasions.
Solution Approach 2:
The patent applies preliminary action by pre-configuring multiple reception occasions and their parameters through higher layer signaling before actual data transmission. This advance configuration eliminates the need for repeated detailed indications in subsequent DCI messages, reducing overhead while ensuring reliable reception across all configured occasions.
3Adaptability or versatility
If reception occasions are configured by higher layer signaling, then resource allocation flexibility is improved, but configuration complexity increases
Solution Approach 1:
The patent segments the reception occasion configuration into multiple independent components (time resources, frequency resources, spatial relations, activation conditions). Each component can be configured and adjusted independently through higher layer signaling, providing flexibility in resource allocation while managing complexity through modular configuration structures.
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes a receiving section that receives data in at least one occasion of a plurality of occasions configured by higher layer signaling, the data being multicasted in the plurality of occasions, and a control section that decodes the data. According to one aspect of the present disclosure, it is possible to appropriately receive downlink data with multicast.