PDSCH Beam Selection with Self-Interference Mitigation
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Solution Overview
Problem
Current wireless communication technologies face challenges in effectively managing self-interference during full duplex operations in wireless communication networks, particularly in selecting suitable downlink beams for receiving physical downlink shared channel (PDSCH) communications without degrading performance due to concurrent uplink transmissions.
Innovation Solution
The method involves determining a set of usable downlink beams for each uplink beam by measuring beam quality in the presence of self-interference and selecting a default downlink beam that is also a usable beam, allowing for successful reception and transmission during full duplex operations, thereby reducing errors and conserving network resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a downlink beam is selected for PDSCH reception without considering self-interference from concurrent uplink transmissions, then beam selection simplicity is maintained, but reception reliability deteriorates due to self-interference degradation
Solution Approach 1:
The patent applies preliminary action by determining a set of usable downlink beams in advance, before actual PDSCH reception occurs. The UE identifies which downlink beams are suitable for reception during full duplex operations by considering self-interference characteristics beforehand. This pre-determination allows the UE to quickly select an appropriate beam when needed, maintaining reliability without adding complex real-time decision-making processes.
Solution Approach 2:
The patent changes the parameter of beam selection from a simple geometric/spatial choice to a quality-assessed selection based on measured beam qualities. By introducing beam quality measurements and using these measurements to identify usable beams, the system transforms the selection criterion from purely spatial to quality-driven, thereby improving reception reliability while managing complexity through systematic evaluation.
2Reliability
If beam quality measurement is performed in the presence of self-interference, then accurate beam assessment for full duplex operations is achieved, but measurement precision deteriorates due to interference contamination
Solution Approach 1:
The patent converts the harmful effect of self-interference into a beneficial measurement opportunity. Instead of avoiding measurements during full duplex operations, the UE deliberately performs beam quality measurements in the presence of self-interference. This allows the system to identify which beams remain usable despite interference, transforming the interference condition from a measurement obstacle into a practical test that reveals true beam usability under operating conditions.
Solution Approach 2:
The patent applies dynamics by making the beam selection process adaptive to changing interference conditions. Rather than using fixed beam selections or measurements taken under ideal conditions, the system dynamically adjusts beam selection based on real-time measurements performed during actual full duplex operations. This dynamic approach ensures that beam selections reflect current interference conditions, improving the accuracy of usability determination.
3Productivity
If default downlink beam selection is performed without considering uplink beam associations, then selection speed is maintained, but communication throughput deteriorates due to suboptimal beam choices
Solution Approach 1:
The patent applies preliminary action by pre-determining the set of usable downlink beams associated with each uplink beam before actual communication occurs. This pre-computation of beam associations and usability information allows the system to quickly select appropriate beams during full duplex operations without performing complex real-time analysis, thereby maintaining selection speed while improving throughput through better beam choices.
Solution Approach 2:
The patent creates a universal beam selection framework that works for both traditional and full duplex operations. By establishing a systematic method for determining usable beams that considers uplink beam associations and self-interference characteristics, the solution provides a multi-functional approach that improves throughput across different operational modes while maintaining efficient selection processes.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive scheduling information that schedules a physical downlink shared channel (PDSCH) communication for the UE; and select a downlink beam for reception of the PDSCH communication from a set of usable downlink beams associated with an uplink beam to be used by the UE for uplink transmission in one or more symbols in which the PDSCH communication is scheduled. Numerous other aspects are provided.