Terminal QCL Parameter Scheduling for Multicast Reception
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Solution Overview
Problem
In future wireless communication systems like NR, the reception of multicast downlink data in ultra-dense and high-traffic environments is not adequately addressed, leading to potential system performance deterioration and decreased throughput.
Innovation Solution
A terminal equipped with a receiving section that processes downlink control information and uses quasi-co-location (QCL) parameters to schedule and transmit data across multiple reception occasions, ensuring appropriate reception of multicast data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional NR specifications are used for multicast downlink data reception, then the system structure is simple, but system performance deteriorates and throughput decreases
Solution Approach 1:
The patent applies parameter changes by introducing QCL parameter associations between downlink control information and data reception occasions. Specifically, the terminal determines which reception occasion to use based on QCL parameter matching, changing the reception parameters dynamically according to the associated control information. This resolves the contradiction by enabling reliable multicast reception through proper parameter association while maintaining efficient resource utilization and throughput in ultra-dense environments.
2Reliability
If multiple reception occasions are scheduled for multicast data, then data reception reliability improves, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing QCL parameter associations between downlink control information and multiple reception occasions before actual data transmission. The terminal is configured in advance with the relationships between control information pieces and their corresponding reception occasions through QCL parameters. When receiving multicast data, the terminal simply needs to match the QCL parameters rather than performing complex real-time analysis, thus improving reception reliability while keeping device complexity manageable.
3Measurement precision
If QCL parameters are used to schedule reception occasions, then multicast data reception accuracy improves, but information processing complexity increases
Solution Approach 1:
The patent applies copying by using QCL parameters as reference copies that link downlink control information to appropriate reception occasions. Instead of processing complex control information directly, the terminal copies the QCL parameter associations and uses these simplified references to determine which reception occasion to use. This approach improves reception accuracy by maintaining precise parameter matching while reducing the complexity of control information processing through the use of parameter copies.
Data Source
AI summary
A terminal according to an aspect of the present disclosure includes a receiving section that receives a piece of downlink control information of a plurality of pieces of downlink control information, and a control section that uses, among a plurality of reception occasions, a reception occasion corresponding to a quasi-co-location (QCL) parameter for receiving data, in which the plurality of pieces of downlink control information schedules each of the plurality of reception occasions, and the data is transmitted in each of the plurality of the reception occasions. According to one aspect of the present disclosure, multicast downlink data can be appropriately received.