Uplink Configured Grant Selection for Low-Latency Multi-Grant Scheduling
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Solution Overview
Problem
In future radio communication systems, the configuration of multiple configured grants (multi configured grants) is not adequately addressed, leading to potential degradation of system performance due to increased configuration overhead and latency in transmission.
Innovation Solution
A user terminal and radio communication method are developed to appropriately configure multiple configured grants by using specific parameters and methods, such as higher layer signaling and DCI activation, to manage and optimize the transmission resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple configured grants are configured in one cell for a UE, then transmission capacity and resource allocation flexibility are improved, but configuration overhead increases
Solution Approach 1:
The patent segments the configuration parameters into two distinct groups: common parameters that are shared across multiple configured grants, and individual parameters that are specific to each configured grant. This segmentation allows the system to configure multiple grants efficiently by reusing common parameters while maintaining individual customization where needed, thereby reducing overall configuration overhead while preserving transmission capacity.
2Adaptability or versatility
If multiple configured grants are configured in one cell for a UE, then resource allocation flexibility is improved, but latency in transmission increases
Solution Approach 1:
The patent implements preliminary configuration of multiple configured grants with pre-defined parameter sets, including common parameters that can be applied across multiple grants. This preliminary setup allows the UE to quickly select and activate appropriate grants without undergoing lengthy configuration processes at transmission time, thereby maintaining resource allocation flexibility while minimizing transmission latency.
3Reliability
If configuration parameters are optimized for multiple configured grants, then system performance is improved, but configuration complexity increases
Solution Approach 1:
The patent introduces common parameters that serve multiple configured grants simultaneously, making the configuration system universal rather than purely individualized. These common parameters can be applied across different grant configurations, reducing the total number of parameters that need to be managed and configured. This multi-functionality approach maintains system performance through proper parameter optimization while reducing overall configuration complexity.
Data Source
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AI summary
A user terminal includes: a receiving section that receives configuration information regarding a plurality of configured grant configurations, the configuration information including at least one of a hybrid automatic repeat request (HARQ) process ID offset for derivation of a HARQ process ID of uplink data, a start time offset for derivation of a transmission start time of the uplink data, or a transmission power control (TPC) index for identification of TPC of the uplink data; and a control section that uses one configured grant configuration based on an uplink data occurrence timing, out of the plurality of configured grant configurations, for transmission of the uplink data, on the basis of the configuration information. According to one aspect of the present disclosure, configuration of a plurality of configured grants can be appropriately performed.