Beam Pair Link Switching Threshold for Millimeter Wave Timing
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in switching beam pair links (BPLs) due to timing constraints, particularly in millimeter wave (mmW) frequencies, where base stations and user equipment (UE) struggle to dynamically change BPLs quickly enough to adapt to channel conditions, leading to potential errors and reduced network performance.
Innovation Solution
The described techniques involve determining a threshold value for the time needed to decode BPL indications and using a scheduling offset to manage BPL switching, allowing the UE to maintain current BPLs until an indication is received to change, and switching only when sufficient time is available, ensuring accurate beam alignment and minimizing errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If beam pair link switching is performed rapidly to adapt to channel conditions, then adaptability improves, but timing errors and decoding failures increase
Solution Approach 1:
The patent applies preliminary action by determining a threshold value in advance that represents the minimum time needed for UE to decode BPL indications and switch beams. This pre-established threshold is used to evaluate scheduling offsets before beam switching occurs, ensuring that sufficient time is allocated for decoding. The base station uses this pre-determined threshold to make informed decisions about whether to schedule beam switching, thereby preventing timing errors while maintaining adaptability.
Solution Approach 2:
The patent implements dynamics by making the beam switching decision conditional rather than fixed. The system dynamically evaluates each scheduling offset against the threshold value and adjusts beam switching behavior accordingly. When the scheduling offset meets the threshold, beam switching is permitted; when it falls short, the system maintains the current BPL. This dynamic adaptation resolves the contradiction by allowing rapid switching only when timing conditions are satisfied.
2Reliability
If beam pair link switching is delayed to ensure proper decoding time, then reliability improves, but network efficiency deteriorates
Solution Approach 1:
The patent applies parameter changes by introducing a threshold parameter that represents the minimum decoding time. This parameter transforms the beam switching decision from a binary choice to a conditional evaluation. The base station compares the scheduling offset against this threshold parameter, allowing beam switching to proceed only when the time parameter satisfies the decoding requirement. This parameter-based control ensures reliability while avoiding unnecessary delays that would reduce network efficiency.
Solution Approach 2:
The system implements self-service by enabling the base station to autonomously evaluate scheduling offsets against the threshold and make beam switching decisions without external intervention. The base station serves itself by internally determining whether timing conditions are met and automatically adjusting BPL accordingly. This self-service mechanism ensures reliable beam switching while maintaining network efficiency through autonomous, real-time decisions.
3Productivity
If threshold value is set low to enable faster beam switching, then productivity improves, but measurement precision deteriorates
Solution Approach 1:
The patent implements feedback by using the threshold value as a reference point that guides beam switching decisions. The system continuously monitors scheduling offsets and compares them against this feedback threshold. When the offset meets or exceeds the threshold, beam switching is triggered; when it falls short, switching is deferred. This feedback mechanism ensures that beam switching speed is optimized without sacrificing timing accuracy, as each switching decision is validated against the precision threshold.
4Adaptability or versatility
If beam pair link indication is frequently updated to reflect channel conditions, then adaptability improves, but loss of information increases
Solution Approach 1:
The patent applies preliminary action by pre-determining the threshold value that ensures sufficient time for control information decoding. This pre-established threshold acts as a safeguard against information loss by guaranteeing that beam pair link indications are only updated when timing conditions allow for successful decoding. The base station uses this preliminary threshold to filter out insufficient scheduling opportunities, thereby maintaining adaptability while preventing control information loss.
Data Source
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AI summary
Methods, systems, and devices for wireless communications are described that provide for signaling and switching of beam pair links (BPLs) for directional transmission beams between a base station and a user equipment (UE). A threshold value may be determined, which corresponds to an amount of time for a UE to receive and decode control information, and apply a different BPL than a current BPL that that is in use. The UE may maintain a BPL for data, which is used during data transmission time intervals (TTIs) until an indication is received to change the BPL for data. The UE and the base station may determine to change between BPLs based at least in part on the threshold value and a scheduling offset between a control channel transmission that allocates resources for a data TTI and a start of the data TTI.