Wireless Uplink Resource Segmentation for Grant-Free Collision Reduction
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in grant-free uplink transmissions, particularly in 5G Ultra-Reliable Low Latency Communications (URLLC), due to high collision probabilities and resource utilization inefficiencies, which are exacerbated by autonomous UE decisions on modulation and coding schemes without adequate base station feedback.
Innovation Solution
Implementing a system where user equipment (UE) is configured with a set of physical resource blocks divided into sub-bands, each associated with different transmission schemes, allowing for dynamic adjustment of bandwidth and modulation and coding schemes based on channel conditions and quality of service, with base station feedback for optimal resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If autonomous UE decisions on modulation and coding schemes are used in grant-free uplink transmissions, then transmission speed and autonomy are improved, but collision probability increases and reliability deteriorates
Solution Approach 1:
The patent segments the set of physical resource blocks into multiple subsets, where each subset is associated with a specific transmission scheme. This segmentation allows UEs to autonomously select appropriate subsets based on channel conditions while the base station can manage and coordinate these selections, thereby maintaining transmission speed while reducing collision probability through structured resource division.
2Adaptability or versatility
If multiple transmission schemes are assigned to different resource block subsets, then adaptability and resource utilization are improved, but system complexity increases
Solution Approach 1:
The patent applies local quality by associating different transmission schemes with specific subsets of physical resource blocks. Each subset is optimized for particular channel conditions or service requirements, allowing the system to adapt locally to different conditions without requiring complex global coordination. The base station configures these subsets with specific parameters, enabling targeted optimization while maintaining manageable system complexity.
3Productivity
If grant-free uplink transmission is implemented, then latency is reduced and productivity is improved, but resource utilization efficiency deteriorates due to high collision probabilities
Solution Approach 1:
The patent implements feedback mechanisms where the base station receives information from UEs about their selected subsets and transmission schemes. This feedback allows the base station to coordinate resource allocation, manage collisions, and optimize overall resource utilization. The feedback loop enables the system to maintain the low-latency benefits of grant-free transmission while improving resource efficiency through centralized coordination and adaptive resource management.
Data Source
AI summary
A grant free uplink data transmission is caused from a device using one of a plurality of subsets of a set of physical resource blocks. Each subset is associated with a transmission scheme, wherein at least a plurality of said subsets are associated with different transmission schemes.