Full-Duplex UE Scheduling for Concurrent Uplink and CLI Measurements
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Solution Overview
Problem
In full-duplex wireless communication systems, uplink transmissions often overlap with cross-link interference (CLI) measurements, leading to transmission timing errors and interference, which existing technologies struggle to address effectively.
Innovation Solution
User equipment (UE) indicates its capability to support simultaneous uplink transmissions and CLI measurements in a full-duplex mode, allowing the network entity to allocate resources for concurrent operations, or prioritize one over the other based on the UE's capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex communication mode is used to enable simultaneous uplink and downlink transmissions, then communication efficiency and productivity are improved, but cross-link interference measurements cannot be accurately performed because uplink transmissions overlap with CLI measurement resources
Solution Approach 1:
The patent segments the time-frequency resources by introducing a new field in the Downlink Control Information (DCI) to indicate whether a resource is configured for CLI measurement or uplink transmission. This segmentation allows the system to distinguish between measurement resources and transmission resources, enabling accurate CLI measurements while maintaining full-duplex communication efficiency through proper resource separation and scheduling.
2Measurement precision
If CLI measurements are prioritized to ensure accurate interference measurement, then measurement precision is improved, but uplink transmission timing accuracy deteriorates due to transmission timing errors
Solution Approach 1:
The patent introduces a mediator mechanism through the DCI field that acts as an intermediary between the CLI measurement function and the uplink transmission function. This intermediary signal indicates the intended use of each resource, allowing the UE to properly schedule CLI measurements and uplink transmissions without interference, thereby maintaining both measurement accuracy and transmission timing accuracy simultaneously.
3Ease of operation
If resource allocation is simplified to improve ease of operation, then device complexity is reduced, but the system cannot support both simultaneous CLI measurements and uplink transmissions
Solution Approach 1:
The patent applies universality by using a single DCI field to serve multiple purposes: it indicates whether a resource is for CLI measurement or uplink transmission, and it enables the system to adapt to different operational modes (full-duplex or half-duplex). This multi-functional indicator simplifies resource allocation while maintaining the versatility to support both simultaneous CLI measurements and uplink transmissions based on UE capability.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a message to a network entity indicating a capability of the UE to support simultaneous uplink transmissions and cross-link interference (CLI) measurements on respective resources while operating in a full-duplex communication mode. The UE may perform a CLI measurement, an uplink transmission, or both in accordance with the capability. For example, the UE may perform both simultaneously or may prioritize either the CLI measurement or the uplink transmission. The CLI measurement and the uplink transmission may occur during resources that at least partially overlap in the time domain.