UE Filter Capability Signaling for Sub-Band Full Duplex Interference
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently supporting sub-band full duplex communication due to self-interference and inter-gNB/UE cross-link interference, which affects the ability of user equipment (UE) to maintain phase and frequency coherence during adaptive filter configuration.
Innovation Solution
The implementation of UE filter capability signaling allows user equipment (UE) to report its adaptive filter configuration capabilities to the network entity, enabling the UE to switch between half-duplex and sub-band full duplex configurations, thereby mitigating interference and optimizing communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sub-band full duplex communication is implemented, then communication efficiency and resource utilization are improved, but self-interference and cross-link interference increase
Solution Approach 1:
The patent implements dynamic filter configuration where the UE can adaptively switch between half-duplex and full-duplex modes based on network conditions and capability signaling. The filter settings are dynamically adjusted to optimize performance while managing interference levels in real-time operational scenarios.
Solution Approach 2:
The patent changes the operational parameters of the UE by introducing capability signals that indicate filter switchability between half-duplex and full-duplex configurations. This parameter change enables the system to select optimal operating modes that balance communication efficiency with interference management.
2Object-affected harmful factors
If adaptive filter configuration is implemented, then interference mitigation is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service by having the UE autonomously determine and signal its own filter capabilities to the network. The UE performs self-assessment of its half-duplex and full-duplex operational capabilities and communicates this information through capability signals, eliminating the need for complex network-side configuration management.
Solution Approach 2:
The patent establishes a feedback mechanism where the UE reports its filter configuration capabilities to the network entity through capability signals. This feedback loop enables the network to make informed scheduling decisions based on actual UE capabilities, simplifying the overall system complexity while maintaining effective interference mitigation.
3Adaptability or versatility
If filter switchability is enabled, then communication flexibility is improved, but phase and frequency coherence maintenance becomes more difficult
Solution Approach 1:
The patent applies preliminary action by having the UE pre-determine and signal its filter switchability capabilities before actual communication operations begin. The capability signaling occurs in advance, allowing the network to plan and coordinate operations that maintain phase and frequency coherence while utilizing the flexible filter configurations.
Data Source
AI summary
Aspects of the present disclosure include methods, apparatuses, and computer-readable medium for transmitting at least one capability signal to a network entity, wherein the at least one capability signal indicates whether at least one filter in at least one receive chain of the UE is adaptively switchable between a first configuration and a second configuration, wherein the first configuration supports half-duplex communication with the network entity, wherein the second configuration supports sub-band full duplex communication with the network entity; and exchanging a signal between the UE and the network entity according to the at least one capability signal.