Full-Duplex TCI Conflict Resolution for Overlapping Wireless Messages
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Solution Overview
Problem
Wireless devices operating in full-duplex mode experience self-interference due to overlapping communications, leading to poor performance and failed transmissions, as beams associated with different transmission configuration indicator (TCI) states cause interference.
Innovation Solution
The wireless device performs a conflict resolution procedure by comparing priority values of overlapping messages, dropping or changing the TCI state of lower priority messages, or transmitting feedback messages to resolve conflicts, thereby enabling simultaneous communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex mode is used to enable simultaneous transmission and reception, then communication efficiency is improved, but self-interference occurs between overlapping beams causing transmission failures
Solution Approach 1:
The system performs preliminary actions by determining TCI state conflicts before transmission occurs. The network device or terminal device identifies potential interference between first and second TCI states scheduling overlapping messages, and resolves the conflict in advance by selecting a resolution scheme (dropping lower priority message, changing TCI state, or adjusting time-frequency resources) before the actual transmission takes place, preventing transmission failures proactively
Solution Approach 2:
The TCI state conflict determination mechanism acts as an intermediary between the full-duplex transmission system and the interference problem. By introducing this intermediate layer that specifically identifies and resolves TCI state conflicts, the system can manage self-interference without abandoning full-duplex operation, thus maintaining communication efficiency while improving transmission reliability
2Productivity
If multiple messages with different TCI states are transmitted simultaneously to improve resource utilization, then spectral efficiency is improved, but beam interference causes message decoding failures
Solution Approach 1:
The system applies local quality by treating different TCI states and their associated messages differently based on their specific interference characteristics. Instead of a uniform approach, the conflict resolution is applied locally to each conflicting TCI state pair, allowing the system to maintain beneficial simultaneous transmissions while selectively resolving only the specific interference problems between particular beam pairs
Solution Approach 2:
The system changes parameters dynamically by adjusting TCI states, message priorities, time-frequency resource allocations, or power levels based on the detected conflict. This parameter adjustment allows the system to resolve beam interference while maintaining high spectral efficiency by optimizing the transmission parameters rather than simply reducing transmission capacity
3Reliability
If conflict resolution procedures are implemented to reduce self-interference, then transmission reliability is improved, but system complexity increases due to additional signaling and processing
Solution Approach 1:
The system implements self-service by enabling the terminal device or network device to autonomously determine TCI state conflicts and select appropriate resolution schemes without requiring complex centralized coordination. The device uses locally available information about scheduled messages and their TCI states to independently resolve conflicts, reducing the need for additional signaling and processing complexity while maintaining high transmission reliability
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Some wireless communications systems may support priority based conflict resolution in full-duplex operations. In some cases, a wireless device may communicate one or more control messages scheduling a first message associated with a first transmission configuration indicator (TCI) state and scheduling a second message associated with a second TCI state, where at least a portion of the first message overlaps in time with the second message. In some cases, the wireless device may perform a conflict resolution procedure for the first message and the second message based on the first message at least partially overlapping in time with the second message and a conflict between the first TCI state and the second TCI state. Additionally, the wireless device may communicate at least the first message based on the conflict resolution procedure.