Inter-UE CLI Measurement Timing for Overlapping Subbands
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Solution Overview
Problem
Existing wireless communication systems lack a mechanism to support user equipment (UE) performing simultaneous cross-link interference (CLI) measurements in both uplink and downlink subbands during overlapping symbol periods, due to differences in uplink and downlink timing.
Innovation Solution
The UE reports its capability to support inter-UE CLI measurements in both subbands and transmits a capability message to the network entity. The UE can then perform CLI measurements using separate measurement windows and according to either the uplink or downlink timing, as indicated by the measurement resource configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE performs simultaneous CLI measurements in both uplink and downlink subbands during overlapping symbol periods, then the measurement capability and interference mitigation ability are improved, but the device complexity and timing synchronization difficulty increase due to different uplink and downlink timing
Solution Approach 1:
The patent divides the measurement process into separate measurement windows for uplink and downlink subbands. The UE is configured with distinct measurement timing for each subband type, allowing independent measurement operations rather than requiring simultaneous complex measurements across both subbands at once. This segmentation reduces the instantaneous processing complexity while maintaining comprehensive measurement coverage.
Solution Approach 2:
The patent implements dynamic measurement configuration where the network entity can flexibly configure measurement resources and timing based on actual system conditions. The UE adapts its measurement behavior according to received configuration parameters, switching between different measurement modes (simultaneous or sequential) depending on capability indications and network requirements. This dynamic approach allows the system to optimize between measurement completeness and device complexity on a per-situation basis.
2Measurement precision
If the UE uses separate measurement windows for uplink and downlink subbands, then the timing synchronization and measurement accuracy are improved, but the measurement time and resource overhead increase
Solution Approach 1:
The patent allows the network to configure measurement resources that may be more comprehensive than strictly necessary (excessive action), providing robust measurement capability. Alternatively, the system can select partial measurements focusing only on the most critical subbands or time periods needed for current interference conditions. This flexibility allows optimization between measurement thoroughness and time consumption based on actual system needs.
Solution Approach 2:
The implementation uses periodic measurement opportunities where the UE performs CLI measurements at configured intervals rather than continuously. The network entity configures periodic measurement resources, allowing the UE to maintain accurate measurements while operating in a time-efficient manner. This periodic approach balances measurement accuracy requirements with time resource conservation.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a capability message indicating that the UE supports performing inter-UE cross-link interference (CLI) measurements in an uplink subband and in at least one downlink subband during one or more overlapping subband full-duplex symbols. The UE may receive, based at least in part on the capability message, a measurement resource configuration for performing the inter-UE CLI measurements in the uplink subband and the at least one downlink subband. The UE may transmit, according to the measurement resource configuration, a measurement report message indicating a measurement result for the inter-UE CLI measurements.