Configured Grant Uplink Control for Unlicensed Cells
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Solution Overview
Problem
Current multicarrier communication systems face challenges in efficiently managing configured grants for unlicensed cells, particularly in terms of resource allocation and scheduling, which affects the overall performance and capacity of wireless networks.
Innovation Solution
The implementation of configured grants in multicarrier communication systems, utilizing advanced modulation and transmission mechanisms such as OFDMA, CDMA, and hybrid mechanisms like TDMA/CDMA, along with dynamic modulation and coding schemes, to optimize resource allocation and scheduling for unlicensed cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If configured grants are implemented in unlicensed cells, then resource allocation efficiency is improved, but scheduling complexity increases
Solution Approach 1:
The system performs preliminary configuration of grant parameters and resources before actual transmission occurs. The network pre-configures grant parameters including time-frequency resources, modulation and coding schemes, and power settings, allowing UEs to autonomously transmit without real-time scheduling decisions, thus improving efficiency while managing complexity through advance planning
Solution Approach 2:
The configured grant functionality is segmented into distinct components: grant configuration parameters, resource allocation patterns, transmission parameters, and validation rules. This segmentation allows the system to manage scheduling complexity by handling each aspect separately while maintaining overall resource allocation efficiency
2Quantity of substance
If advanced modulation and transmission mechanisms are utilized, then network capacity is improved, but system complexity increases
Solution Approach 1:
The system dynamically adjusts modulation and coding schemes based on channel conditions and traffic requirements. Configured grants include dynamic parameters that can be modified through network signaling, allowing the system to optimize network capacity by adapting transmission characteristics while managing complexity through conditional logic rather than fixed complex structures
Solution Approach 2:
The configured grant mechanism serves multiple functions simultaneously: resource allocation, power control, modulation selection, and transmission scheduling. This multi-functionality improves network capacity by consolidating multiple control functions into a single framework rather than requiring separate complex systems for each function
3Reliability
If resource allocation is optimized for unlicensed cells, then transmission reliability is improved, but scheduling flexibility decreases
Solution Approach 1:
The system incorporates feedback mechanisms where UEs report transmission status, channel conditions, and resource usage to the network. This feedback enables the network to adjust configured grant parameters to maintain transmission reliability while adapting to changing conditions, thus preserving scheduling flexibility through information-driven adjustments rather than rigid fixed allocations
Data Source
AI summary
A base station transmits, to a wireless device, configuration parameters of one or more configured grants of a cell. The base station receives code block groups, of a transport block, multiplexed with first uplink control information corresponding to the code block groups. The base station transmits a downlink control information indicating one or more negative hybrid automatic repeat request feedback of one or more code block groups of the code block groups. The base station receives, via a radio resource of the one or more configured grants, the one or more code block groups of the transport block and second uplink control information, corresponding to the one or more code block groups, having a first size that is: based on a second size of the one or more code block groups of the transport block, and smaller than a third size of the first uplink control information.