Implicit Beam Switching With Time Offset Alignment
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Solution Overview
Problem
In wireless communication systems, the alignment of beam switch application times between user equipment (UE) and base stations is not clear, leading to potential misalignments that can degrade communications and waste processing and signaling resources due to retransmissions during implicit beam switches.
Innovation Solution
Implementing a specified time offset for implicit beam switches, where the UE switches to a new beam after transmitting a beam report, receiving a beam switch response, or a scheduled communication, aligning the application times with the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If beam switching is performed without a specified time offset, then beam switching speed is improved, but beam alignment between UE and base station deteriorates leading to communication degradation
Solution Approach 1:
The base station sends a beam switch indication message to the UE in advance, specifying the time offset before the beam switch should be applied. This preliminary action allows both UE and base station to prepare for the beam switch at the same future time point, ensuring synchronized beam alignment while maintaining fast switching capability.
Solution Approach 2:
The beam switch indication message includes a specified time offset parameter that provides feedback timing information to the UE. This feedback mechanism ensures the UE knows exactly when to apply the beam switch to align with the base station's beam configuration, preventing misalignment while enabling rapid beam switching.
2Speed
If beam switching is performed without a specified time offset, then beam switching responsiveness is improved, but communication efficiency deteriorates due to retransmissions
Solution Approach 1:
The base station provides the time offset value in advance through the beam switch indication message, allowing the UE to plan the beam switch timing. This preliminary timing information prevents beam misalignment during scheduled communications, avoiding retransmissions and maintaining high communication efficiency while preserving fast beam switching responsiveness.
3Adaptability or versatility
If beam switching is performed without a specified time offset, then beam switching flexibility is improved, but resource waste increases due to retransmissions
Solution Approach 1:
The beam switch indication message carries a specified time offset parameter that provides precise timing feedback to the UE. This feedback ensures the beam switch is applied at the optimal moment to avoid communication conflicts and retransmissions, preventing waste of processing and signaling resources while maintaining the flexibility of implicit beam switching.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a base station, a beam report that indicates that the UE is to switch to a beam for a physical uplink channel. The UE may switch to the beam a specified time offset after one of: transmitting the beam report to the base station, receiving a beam switch response from the base station in response to the beam report, or a scheduled communication on the physical uplink channel. Numerous other aspects are described.