Uplink Gap Triggering via UE-Assisted Signaling
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Solution Overview
Problem
Current 5G NR systems lack efficient mechanisms for uplink (UL) gap triggering, which is essential for self-calibration and monitoring, particularly in Frequency Range 2 (FR2), leading to performance gaps and interruptions in UE transmission.
Innovation Solution
User equipment (UE) and base station processors are configured to transmit and receive signaling messages for UL gap activation and deactivation requests, utilizing UE-assisted information (UAI) and Medium Access Control-Control Element (MAC CE) signaling to manage UL gaps, allowing for preconfigured gap configurations that minimize transmission disruptions for calibration and power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If UL gap is configured for self-calibration and monitoring in FR2, then system performance and calibration accuracy are improved, but transmission interruptions and loss of time occur
Solution Approach 1:
The network pre-configures multiple UL gap patterns with different parameters (periodicity, offset, duration) before UE needs calibration. When UE indicates calibration need, the network activates a pre-prepared pattern, reducing setup time and minimizing transmission interruption while ensuring calibration accuracy is achieved.
Solution Approach 2:
The system dynamically selects and switches between different UL gap patterns based on real-time UE calibration needs and network conditions. The network can activate, deactivate, or switch gap patterns on-the-fly, optimizing the balance between calibration accuracy and transmission continuity without fixed static configuration.
2Adaptability or versatility
If multiple UL gap patterns are configured for different scenarios, then adaptability and versatility are improved, but device complexity increases
Solution Approach 1:
The system segments the gap configuration into multiple independent patterns, each optimized for specific calibration scenarios. Instead of one complex configurable pattern, multiple simpler predefined patterns are created, making it easier to select and manage appropriate configurations for different calibration needs without overwhelming complexity.
Solution Approach 2:
Rather than maintaining one complex long-lived configurable gap pattern, the system uses multiple simpler, scenario-specific gap patterns that can be activated temporarily and discarded. Each pattern is simple and purpose-built, reducing the cognitive and computational burden of configuration management while providing high adaptability.
Data Source
AI summary
Embodiments of the present disclosure relate to uplink (UL) gap triggering. According to embodiments of the present disclosure, a processor of user equipment is configured to perform following operations. The operations comprise transmitting to a network a user preference via a first signaling, wherein the user preference indicates a preference of the UE in uplink (UL) gap configuration; transmitting to the network an UL gap activation request via a second signaling, wherein the UL gap activation request indicates the network that an UL gap activation for the UE is needed; and transmitting to the network device an UL gap deactivation request via a third signaling, wherein the UL gap deactivation request indicates the network that an UL gap deactivation for the UE is needed.