Bandwidth Part Switching Ignoring Uplink Grants
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Solution Overview
Problem
Current multicarrier communication systems face challenges in efficiently managing carrier aggregation and interworking between different radio access technologies, leading to suboptimal resource allocation and increased latency in 5G networks.
Innovation Solution
The implementation of advanced scheduling mechanisms and interworking protocols between 5G and LTE networks, enabling multi-connectivity and carrier aggregation, allows for dynamic resource allocation and improved latency performance by utilizing multiple schedulers and timing advance groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a grant is received in response to switching between bandwidth parts, then resource allocation is updated, but processing delay increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple bandwidth parts and preparing grant configurations in advance. When switching between bandwidth parts, the UE already has pre-configured grant information ready, allowing immediate resource allocation without waiting for new grant reception, thus reducing processing delay while maintaining efficient resource allocation.
2Adaptability or versatility
If multiple bandwidth parts are configured for switching, then resource utilization flexibility improves, but system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the total bandwidth into multiple distinct bandwidth parts, each with specific configurations. This allows the system to switch between different bandwidth segments based on traffic requirements, improving resource allocation flexibility. The segmentation approach manages complexity by creating modular, independently configurable bandwidth segments rather than managing a monolithic bandwidth structure.
Solution Approach 2:
The patent implements dynamics by enabling dynamic switching between different bandwidth parts based on real-time traffic conditions and resource availability. The system can adaptively activate or deactivate specific bandwidth parts and their associated grants, providing flexible resource utilization while managing complexity through conditional activation rather than permanent configuration of all possible bandwidth segments.
3Manufacturing precision
If grant reception is required for every bandwidth part switch, then resource allocation accuracy improves, but latency increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring grant information for multiple bandwidth parts before switching occurs. When a bandwidth part switch is initiated, the UE already possesses the necessary grant configurations, eliminating the need to wait for grant reception during the switch. This maintains resource allocation accuracy through pre-validated grant configurations while reducing switching latency significantly.
Data Source
AI summary
A wireless device may receive downlink control information (DCI) indicating switching from a first bandwidth part to a second bandwidth part at a switching time. The wireless device may switch, based on the DCI and at the switching time, from the first bandwidth part to the second bandwidth part as an active bandwidth part. The wireless device may ignore, in response to the switching time being earlier than a transmission time indicated by an uplink grant, the uplink grant for the first bandwidth part.