Full-Duplex UE Timing for Concurrent Self- and Cross-Link Measurements
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Solution Overview
Problem
Existing wireless communication systems face challenges in effectively managing self-interference and cross-link interference in full-duplex operations, which can degrade network performance.
Innovation Solution
A method and apparatus for a full-duplex user equipment (UE) and base station to perform concurrent self-interference and cross-link interference measurements by identifying timing based on scheduled uplink transmission times, allowing for simultaneous measurement and reporting of interference using techniques such as puncturing or rate-matching of transmission resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex operations are implemented to improve spectral efficiency and network capacity, then system productivity increases, but self-interference and cross-link interference degrade measurement precision and network performance
Solution Approach 1:
The patent segments the interference measurement process into distinct phases: identifying timing for interference measurement based on scheduled uplink transmission times, performing self-interference measurement, performing cross-link interference measurement, and reporting results. This segmentation allows each measurement type to be performed at optimally timed moments, improving measurement precision while maintaining full-duplex operations.
Solution Approach 2:
The patent applies preliminary action by identifying the timing for interference measurements in advance based on scheduled uplink transmission times. The UE determines when interference measurements should be performed before actual transmissions occur, allowing the system to proactively manage interference rather than reactively, thus maintaining both high productivity and measurement precision.
2Reliability
If concurrent self-interference and cross-link interference measurements are performed to reduce interference impact, then network performance improves, but device complexity increases
Solution Approach 1:
The patent merges the self-interference measurement and cross-link interference measurement into a single concurrent measurement process. The UE performs both measurements simultaneously during identified time periods, consolidating what would otherwise be separate complex procedures into one unified operation, thereby improving reliability without proportionally increasing device complexity.
Solution Approach 2:
The interference measurement mechanism designed in the patent serves multiple functions: it measures self-interference, measures cross-link interference, and provides timing synchronization based on uplink transmissions. This multi-functionality reduces the need for separate specialized mechanisms, managing device complexity while improving network performance.
3Loss of time
If interference measurement timing is identified based on scheduled uplink transmission times to enable timely interference management, then loss of time is reduced, but device complexity increases due to timing coordination requirements
Solution Approach 1:
The patent implements feedback by having the UE report interference measurement results back to the network based on the identified timing. This feedback loop allows the network to adjust scheduling and resource allocation in real-time, minimizing interference management delays. The timing coordination complexity is managed through standardized feedback mechanisms rather than complex ad-hoc coordination.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a full-duplex user equipment (UE) may identify timing for performing an interference measurement based at least in part on a scheduled uplink transmission time. The full-duplex UE may perform, in a particular symbol and in accordance with the timing for performing the interference measurement, a self-interference measurement and a cross-link interference measurement. Numerous other aspects are provided.