TCI Beam Application Timing Aligned With Active Bandwidth Parts
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing beam application times and bandwidth parts within the unified transmission configuration indication framework, particularly in New Radio (NR) networks, which can lead to suboptimal communication performance.
Innovation Solution
The proposed solution involves a user equipment (UE) that receives a downlink control information (DCI) message carrying a transmission configuration indication (TCI) state, applies this indication after a beam application time based on an active bandwidth part, and communicates using the associated beam, thereby optimizing beam application times and improving communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam application time is managed without alignment to active bandwidth part, then beam switching can be performed independently, but communication performance deteriorates due to suboptimal resource utilization
Solution Approach 1:
The patent applies preliminary action by determining the beam application time in advance based on the active bandwidth part configuration before actual beam switching occurs. The UE calculates the application time offset relative to DCI reception or HARQ-ACK transmission, ensuring the beam is ready to be applied at the optimal moment aligned with bandwidth part activity, thereby improving communication performance and resource utilization.
2Productivity
If beam application time is aligned with active bandwidth part, then resource utilization improves, but beam switching flexibility is reduced
Solution Approach 1:
The patent applies dynamics by making the beam application time flexible and adaptive rather than fixed. The application time is dynamically determined based on the active bandwidth part configuration, DCI reception timing, and HARQ-ACK transmission timing. This allows the system to adapt beam switching to current operational conditions while maintaining alignment with bandwidth part activity, thus improving resource utilization without completely sacrificing flexibility.
Solution Approach 2:
The patent applies parameter changes by modifying the beam application time parameter based on different active bandwidth part configurations. The application time offset is adjusted according to subcarrier spacing, DCI reception time, and HARQ-ACK transmission time parameters, allowing optimal alignment between beam switching and bandwidth part activity under varying system conditions.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, a downlink control information (DCI) message that carries a transmission configuration indication (TCI) state indication. The UE may apply the TCI state indication after a beam application time that is based at least in part on an active bandwidth part associated with the TCI state indication. The UE may communicate with the network node using a beam associated with the TCI state indication after the TCI state indication is applied. Numerous other aspects are described.