Sidelink Carrier Aggregation Pre-Emption Under UE Capability Limits
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Solution Overview
Problem
Wireless communication systems face challenges in managing sidelink carrier aggregation due to limited UE transmission capabilities, leading to reduced throughput and increased latency when scheduling concurrent sidelink messages, particularly for high-priority messages.
Innovation Solution
A UE pre-empts the transmission of a lower-priority sidelink message in favor of a higher-priority message when its transmission capability is exceeded, ensuring the timely delivery of critical communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE schedules more concurrent sidelink transmissions than its transmission capability supports, then the quantity of sidelink messages transmitted increases, but the transmission reliability decreases and latency increases
Solution Approach 1:
The patent implements dynamic transmission capability management by allowing the UE to adaptively adjust its transmission schedule based on real-time capability status. When the transmission capability is exceeded, the UE dynamically refrains from transmitting certain sidelink messages rather than maintaining a fixed transmission schedule, thereby resolving the contradiction between transmitting more messages and maintaining reliability
Solution Approach 2:
The patent applies preliminary action by having the UE determine in advance whether its transmission capability will be exceeded before scheduling transmissions. The UE performs capability checks and proactively decides which messages to transmit or refrain from transmitting, preventing capability overload before it occurs and ensuring transmission reliability is maintained
2Reliability
If the UE refrains from transmitting later-scheduled sidelink messages when capability is exceeded, then transmission reliability is maintained, but throughput decreases and latency increases
Solution Approach 1:
The patent changes the transmission parameter by introducing a capability threshold parameter. When the scheduled transmission quantity exceeds the UE's transmission capability parameter, the system automatically adjusts transmission behavior by refraining from certain transmissions, thereby maintaining reliability while managing throughput through parameter-based control
3Adaptability or versatility
If the UE schedules overlapping sidelink transmissions on multiple carriers, then carrier aggregation efficiency increases, but transmission capability is exceeded
Solution Approach 1:
The patent implements dynamic carrier aggregation management by allowing the UE to adaptively adjust its carrier usage based on real-time transmission capability status. When capability is exceeded, the UE dynamically refrains from transmitting on certain carriers rather than maintaining fixed carrier aggregation, resolving the contradiction between aggregation efficiency and capability utilization
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may communicate sidelink messages over one or more carriers. The UE may schedule a first sidelink message for transmission on a first resource of a first carrier of a set of carriers on which the UE is configured for sidelink carrier aggregation. After scheduling the first sidelink message, the UE may schedule a second sidelink message for transmission on a second resource of a second carrier that at least partially overlaps in time with the first resource. The UE may determine that a transmission capability of the UE pertaining to the overlapping sidelink transmissions has been exceeded by scheduling the second sidelink message and may pre-empt transmission of the first sidelink message in favor of transmission of the second sidelink message based on the transmission capability of the UE being exceeded.