User Equipment Full-Duplex Dynamic Switching
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing full-duplex operations for user equipment (UE), particularly in mitigating self-interference and adapting configurations dynamically to ensure reliable communications.
Innovation Solution
The described techniques enable dynamic full-duplex operation for UE by providing network and UE configurations that allow for switching between full-duplex and half-duplex modes. This is achieved through dynamic signaling, such as downlink control information (DCI) or medium access control (MAC) control elements, which indicate updates to the configuration of symbols, allowing the UE to adjust its operation accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UE operates in full-duplex mode using the same wireless resources for both transmission and reception, then network efficiency and throughput are enhanced, but self-interference occurs that degrades communication reliability
Solution Approach 1:
The patent implements dynamic switching between full-duplex and half-duplex modes based on real-time interference conditions. The UE monitors self-interference levels and can transition between operational modes, allowing the system to exploit full-duplex gains when interference is manageable while falling back to half-duplex mode when self-interference becomes problematic, thus resolving the contradiction between productivity and reliability
Solution Approach 2:
The patent changes the operational parameter of the UE from fixed half-duplex to dynamic full-duplex/half-duplex switching. By modifying the duplex mode parameter based on interference conditions, the system can optimize both network efficiency and communication reliability, as the parameter adjustment allows the UE to adapt to changing self-interference levels while maintaining productive operation
2Adaptability or versatility
If UE is configured for full-duplex operation dynamically, then adaptability to changing conditions is improved, but device complexity increases due to additional configuration and signaling requirements
Solution Approach 1:
The patent employs feedback mechanisms where the UE reports its full-duplex capability and interference conditions to the network entity. This feedback loop enables the network to make informed decisions about configuration switching, reducing the complexity burden on the UE while maintaining high adaptability. The feedback-based approach allows distributed intelligence where the UE provides necessary information without managing complex configuration logic
3Reliability
If UE switches from full-duplex to half-duplex mode due to self-interference, then communication reliability is improved, but network throughput is reduced
Solution Approach 1:
The patent makes the duplex mode dynamic rather than static, allowing the UE to switch between full-duplex and half-duplex based on real-time self-interference conditions. When self-interference is low, the UE operates in full-duplex mode for maximum throughput; when self-interference becomes problematic, it transitions to half-duplex mode to ensure reliability. This dynamic adaptation resolves the contradiction by allowing the system to optimize for different conditions rather than being locked into a single mode
Solution Approach 2:
The patent implements periodic monitoring and evaluation of self-interference conditions, with the UE regularly assessing its operational environment and switching modes as needed. This periodic action allows the system to maintain high throughput during favorable conditions while ensuring reliability during problematic periods, effectively resolving the throughput-reliability trade-off through time-aware optimization
Data Source
AI summary
Methods, systems, and devices for wireless communications are described that provide for full-duplex communications at both a user equipment (UE) and a serving network entity in which the UE, the network entity, or both can dynamically change from full-duplex communications to half-duplex communications. A UE may be configured for full-duplex communications for a set of symbols, and may receive an indication to switch one or more symbols to a half-duplex configuration. The half-duplex configuration may correspond to an indicated half-duplex configuration in which both the network entity and UE operate in the half-duplex configuration, or may correspond to a full-duplex configuration of the network entity in which the UE operates in half-duplex and the network operates in the full-duplex configuration. Signaling that indicates one or more symbols to be switched to the half-duplex configuration may be provided in downlink control information, medium access control signaling, or both.