SBFD Downlink Muting Patterns for Accurate CLI Measurement
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Solution Overview
Problem
In sub-band full-duplex (SBFD) communication, cross-link interference (CLI) occurs due to simultaneous uplink and downlink transmissions between user equipments (UEs), leading to decreased performance and reliability, and existing methods that mute downlink communications for CLI measurements result in inefficient resource utilization and increased latency.
Innovation Solution
UEs perform UE-to-UE CLI measurements using downlink timing without muting downlink communications in preceding symbols, and network nodes configure RE-level or RB-level downlink muting patterns to allow rate matching around CLI measurement resources, enhancing network resource availability and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If downlink communications are muted for CLI measurements, then measurement accuracy is improved, but network resource utilization deteriorates and latency increases
Solution Approach 1:
The patent applies local quality by implementing RE-level or RB-level downlink muting patterns that selectively mute only specific resource elements or resource blocks where CLI measurements are performed, rather than muting entire downlink communications. This allows accurate CLI measurements in specific locations while maintaining downlink communications in other areas, thus resolving the contradiction between measurement accuracy and network resource utilization.
Solution Approach 2:
The patent segments the downlink communication resources into measurement resources and non-measurement resources. By configuring specific RE-level or RB-level muting patterns, the system divides the frequency-time resources such that only portions needed for CLI measurements are muted, while other portions continue to carry downlink communications, thereby maintaining both measurement accuracy and network productivity.
2Measurement precision
If downlink communications are muted for CLI measurements, then measurement accuracy is improved, but latency increases
Solution Approach 1:
By applying local quality through RE-level or RB-level muting patterns, the patent enables CLI measurements to be performed on specific resource elements without requiring complete downlink muting. This localized approach reduces the time required for measurements while maintaining accuracy, as downlink communications can continue in non-muted resources, thereby reducing measurement latency.
3Productivity
If RE-level or RB-level downlink muting patterns are configured, then network resource efficiency is improved, but device complexity increases
Solution Approach 1:
The patent employs parameter changes by configuring RE-level or RB-level muting patterns through network signaling parameters. The network node can dynamically adjust the muting pattern parameters (such as muting resource locations, periodicity, and scope) to optimize network resource efficiency while managing the complexity through standardized configuration mechanisms rather than requiring complex device-side implementations.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, configuration information indicating one or more UE-to-UE cross link interference (CLI) measurement resources, within at least one downlink sub-band in one or more sub-band full-duplex (SBFD) symbols, and indicating a resource element (RE)-level or resource block (RB)-level downlink muting pattern associated with the one or more UE-to-UE CLI measurement resources. The UE may perform one or more UE-to-UE CLI measurements in the one or more UE-to-UE CLI measurement resources. The UE may transmit, to the network node, a measurement report including results of the one or more UE-to-UE CLI measurements. Numerous other aspects are described.