Bandwidth Part Switching With Beam Index Signaling
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing bandwidth part switching and beam management in scenarios involving satellite beams, leading to suboptimal performance and resource utilization.
Innovation Solution
Implementing a method and apparatus for wireless communications that involve receiving and transmitting control messages to manage transmission configuration indicator (TCI) states and bandwidth part identifiers, enabling dynamic switching and beam management, particularly in satellite scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the number of configured bandwidth parts at UE is limited, then device complexity is reduced, but the ability to switch between beams effectively is worsened
Solution Approach 1:
The patent segments the beam switching functionality by introducing a separate beam indicator field in the DCI that operates independently from the bandwidth part configuration. This allows the UE to maintain a limited number of bandwidth part configurations while achieving effective beam switching through the dedicated beam indicator mechanism, resolving the contradiction between device complexity and beam switching capability.
Solution Approach 2:
The patent introduces a beam indicator field as an intermediary element between the bandwidth part configuration and the actual beam selection. This intermediary allows the system to decouple the bandwidth part configuration from the beam selection process, enabling effective beam switching without requiring the UE to configure multiple bandwidth parts for each beam.
2Adaptability or versatility
If frequent beam switching occurs due to satellite mobility, then adaptability is improved, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring the beam indicator field in the DCI format with specific values that correspond to different beams. This allows the network to quickly switch beams by simply changing the beam indicator value without requiring complex reconfiguration procedures, thereby supporting frequent beam switching while minimizing signaling overhead and processing complexity.
Solution Approach 2:
The patent utilizes parameter changes by modifying the DCI format to include a beam indicator field that can take on different values to represent different beams. This parameter-based approach enables efficient beam switching through simple value changes rather than complex message exchanges, reducing the overhead and processing complexity associated with frequent beam switches in satellite communications.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Various techniques for bandwidth part activation and signaling are described. Control messaging may be used to indicate a mapping of beams and bandwidth part to respective indices, such as a bandwidth part identifier or a transmission configuration indicator (TCI) state codepoint. Further control messaging may specify one of these indices, and a user equipment (UE) may communicate with a network entity, such as a satellite or base station using a bandwidth part in a beam specified in the control messaging.