Full-Duplex RACH Resource Interference Mitigation via UE Reporting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication systems face challenges in mitigating crosslink interference (CLI) during full-duplex operations, particularly when devices with different communication protocols are involved.
Innovation Solution
A method and apparatus for a user equipment (UE) to detect and report high CLI, allowing the base station to adjust transmission parameters or avoid full-duplex downlink occasions, and coordinating interference mitigation between UEs supporting advanced and legacy communication protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex mode is used to improve communication efficiency, then spectral efficiency and resource utilization are improved, but crosslink interference between simultaneous transmissions increases
Solution Approach 1:
The patent applies preliminary action by having the first UE report high interference detected in ongoing downlink reception before potential future CLI occurs. This advance reporting allows the base station to proactively adjust transmission parameters or avoid full-duplex downlink occasions, preventing interference before it degrades communication quality
Solution Approach 2:
The patent implements feedback mechanisms where UEs report detected interference levels to the base station. The base station uses this feedback to dynamically adjust transmission parameters, modify downlink occasions, or coordinate with other UEs to mitigate CLI while maintaining full-duplex operations
2Reliability
If advanced signaling protocols are implemented to improve interference mitigation capability, then CLI mitigation effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by enabling advanced interference mitigation signaling only at UEs that support it (first UE), while legacy UEs (second UE) continue using basic protocols. The base station selectively applies advanced coordination mechanisms based on UE capabilities, providing enhanced CLI mitigation where available without forcing complexity on all devices
Solution Approach 2:
The base station acts as an intermediary that receives interference reports from advanced UEs and coordinates mitigation actions. It translates complex interference mitigation requirements into manageable signaling exchanges, mediating between UEs with different protocol capabilities and implementing CLI reduction strategies
3Reliability
If coordination between multiple UEs is implemented to improve CLI mitigation, then interference reduction effectiveness is improved, but system complexity increases
Solution Approach 1:
The patent merges coordination functions by having the base station centralize CLI mitigation management. Instead of requiring direct UE-to-UE coordination protocols, the base station aggregates interference information from multiple UEs and implements coordinated resource allocation, combining mitigation efforts centrally to reduce distributed coordination complexity
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may receive a message scheduling a first resource for a downlink communication between a base station and the first UE, the first resource overlapping with a second resource for a random access channel (RACH) occasion (RO) for use by one or more second UEs. The first UE may receive the downlink communication over the first resource based on receiving the message, where the first resource is full-duplexed with the second resource of the RO and may transmit, over a third resource, an indication of cross link interference between a RACH message transmitted over the second resource and the downlink communication. The first UE may receive a second downlink communication over a fourth resource based at least in part on transmitting the indication.