Uplink Beam Switching Gap Handling in Wireless UEs
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Solution Overview
Problem
Existing beamforming techniques in wireless communication systems are deficient in managing beam switching gaps, particularly at higher frequency ranges where the cyclic prefix duration is less than the beam switching gap, leading to insufficient time for user equipment (UE) to switch between spatial relationships during uplink transmissions.
Innovation Solution
The proposed solution involves adjusting uplink transmission scheduling based on a beam switching gap, where the UE receives signaling to transmit a second uplink signal using the first spatial relationship instead of switching to the second, or shortening the uplink signals to accommodate the gap, allowing for continuous transmission using the initial spatial relationship until a sufficient gap is available for switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam switching is implemented to improve spatial relationship management, then communication reliability is improved, but transmission continuity is disrupted due to insufficient switching time
Solution Approach 1:
The base station performs preliminary scheduling of uplink signals, anticipating beam switching requirements. By pre-planning signal transmissions around beam switching events, the system ensures that signals are scheduled only when sufficient time exists for beam switching, thus maintaining transmission continuity while achieving reliable spatial relationship management
Solution Approach 2:
The system dynamically adjusts uplink signal scheduling based on real-time beam switching status. When beam switching is detected or anticipated, the scheduler dynamically modifies transmission timing to accommodate the switching duration, ensuring continuous transmission without interruption while maintaining communication reliability
2Duration of action of moving object
If uplink signals are shortened to accommodate beam switching gap, then transmission continuity is maintained, but data throughput is reduced
Solution Approach 1:
The system maintains continuous useful action by scheduling uplink signals during periods when beam switching is not required. Instead of shortening signals, the scheduler identifies time windows where beam switching has already occurred or will not occur, allowing full-duration signal transmissions that maintain both continuity and high data throughput
Solution Approach 2:
The system changes scheduling parameters dynamically based on beam switching patterns. By adjusting signal timing, duration, and spatial relationship assignment based on detected beam switching events, the system optimizes both transmission continuity and data throughput without requiring signal shortening
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive signaling from a base station that schedules the UE to transmit a second uplink signal using a second spatial relationship following transmission of a first uplink signal using a first spatial relationship. The second uplink signal may be scheduled within a beam switching gap associated with switching from the first spatial relationship to the second spatial relationship. In some examples, the UE may transmit the second uplink signal using the first spatial relationship, rather than switching to using the second spatial relationship. In some examples, the UE may shorten the first uplink signal or the second uplink signal (or both) to accommodate the beam switching gap.