Pilot Symbol Before Scheduled Uplink for Full-Duplex Interference
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing self-interference and cross-link interference in full-duplex operations, leading to reduced throughput and increased latency due to outdated beam management cycles in frequency division multiplexing and spatial division multiplexing.
Innovation Solution
The implementation of a reference signal or pilot symbol prior to an uplink transmission resource in full-duplex mode allows for measurement and management of self-interference, enabling more accurate beam alignment and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex operations are implemented to improve spectral efficiency, then throughput is improved, but self-interference and cross-link interference increase
Solution Approach 1:
The patent transmits a reference signal in a first symbol before the uplink transmission resource to enable preliminary measurement of self-interference. This preliminary action allows the system to assess interference conditions before actual full-duplex operations, facilitating proactive interference management while maintaining throughput benefits
Solution Approach 2:
The patent implements a feedback mechanism where measurement results from the reference signal are reported to the network entity. This feedback enables the network to adjust scheduling decisions and interference mitigation strategies based on actual measured conditions, resolving the contradiction between maintaining high throughput and managing self-interference
2Device complexity
If beam management cycles are extended to reduce overhead, then device complexity is reduced, but beam alignment accuracy deteriorates
Solution Approach 1:
The reference signal is transmitted in advance in a dedicated first symbol before uplink resources, performing preliminary beam measurement and alignment assessment. This allows the system to maintain accurate beam alignment without requiring frequent full beam management cycles, thereby reducing overhead while preserving precision
Solution Approach 2:
The patent introduces a reference signal as an intermediary element that facilitates beam measurement without requiring complete beam management procedures. This intermediary enables accurate beam alignment assessment with reduced complexity by providing a dedicated measurement opportunity separate from data transmission
3Measurement precision
If reference signal is transmitted in a dedicated symbol before uplink resource, then interference measurement accuracy is improved, but time overhead increases
Solution Approach 1:
The reference signal is transmitted in a first symbol immediately preceding the uplink transmission resource, performing interference measurement at the most relevant time point. This preliminary measurement captures current interference conditions without requiring extended measurement periods, achieving high accuracy with minimal time overhead
Solution Approach 2:
The patent integrates the reference signal transmission into the existing time structure as a dedicated first symbol, maintaining continuous useful action by ensuring this measurement symbol is always present before uplink resources. This continuous integration ensures accurate interference measurement is available without adding significant time overhead to the overall transmission framework
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 for an uplink transmission and a downlink reception in full-duplex. The UE may transmit, in a symbol prior to a resource associated with the uplink transmission, a reference signal. The UE may perform at least one of the uplink transmission or the downlink reception based at least in part on a measurement result associated with the reference signal. Numerous other aspects are described.