Configured Grant Mode Switching for Interference-Adaptive Uplink
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently switching between configured grant (CG) modes, particularly in unlicensed spectrum, leading to suboptimal performance due to semi-static switching latency and unawareness of interference conditions at the user equipment (UE).
Innovation Solution
Implementing dynamic switching techniques between ultra-reliable low-latency communications (URLLC) CG mode and NR-U CG mode by configuring the UE with multiple CG configurations and using control signaling to adapt to changing interference levels, allowing seamless transitions between modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If URLLC CG mode is used for uplink communications in unlicensed spectrum, then low latency and high reliability are achieved, but interference and latency issues occur leading to suboptimal performance
Solution Approach 1:
The patent implements dynamic switching between URLLC CG mode and NR-U CG mode based on real-time interference conditions. The UE monitors interference levels and switches modes accordingly, transforming a static communication mode into a dynamic adaptive system that responds to changing spectral conditions
Solution Approach 2:
The patent changes the operational parameters of the UE by switching between different CG modes (URLLC and NR-U) with distinct parameter sets. This allows the system to adapt latency parameters, reliability parameters, and other communication characteristics based on current interference conditions
2Adaptability or versatility
If dynamic switching between CG modes is implemented, then communication efficiency and adaptability are improved, but device complexity increases
Solution Approach 1:
The base station pre-configures the UE with multiple CG modes (URLLC and NR-U) and their respective parameter sets before actual communication begins. This preliminary configuration eliminates the need for complex real-time mode selection logic at the UE, reducing operational complexity while maintaining adaptability
Solution Approach 2:
The system implements feedback mechanisms where the UE reports interference conditions and communication status to the base station, which then makes informed switching decisions. This feedback loop simplifies the UE's decision-making process by providing external guidance based on network-wide conditions
Data Source
AI summary
Methods, systems, and devices for wireless communication at a user equipment (UE) are described. A UE may receive control signaling configuring at least a first UE operation mode and a second UE operation mode. The UE may transmit one or more uplink messages to a base station in the unlicensed radio frequency spectrum band using a first set of parameters according to the first UE operation mode. In some examples, the UE may receive a control message comprising an indication that the UE is to switch from communicating according to the first configured UE operation mode to communicating according to the second configured UE operation mode. The UE may then transmit, in response to the received indication, one or more uplink messages to the base station in the unlicensed radio frequency spectrum band using a second set of parameters according to the second UE operation mode.