Dynamic UL Gap Activation for FR2 Power Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing uplink (UL) gaps for self-calibration and monitoring, particularly in power amplifier efficiency, transceiver calibration due to temperature variations, and UE Tx power management, which are not adequately addressed by existing standards.
Innovation Solution
The implementation of explicit and implicit UL gap activation/deactivation mechanisms, using radio resource control (RRC) signaling and power headroom reports, allows base stations to dynamically configure UL gaps based on UE capabilities and preferences, enabling efficient power management and self-calibration, even in millimeter wave frequency ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UL gaps are continuously activated for self-calibration and monitoring, then transceiver calibration accuracy and power amplifier efficiency improve, but power consumption increases
Solution Approach 1:
The patent implements dynamic UL gap activation and deactivation based on service requirements. The base station receives UL gap activation indications from the UE and configures UL gap parameters dynamically through RRC signaling, allowing the system to adapt between continuous calibration (high reliability) and power-saving modes (low energy consumption) according to actual communication needs
Solution Approach 2:
The patent changes the operational parameters of the transceiver by introducing configurable UL gap parameters including activation/deactivation states, periodicity, and duration. These parameters can be adjusted based on service types (e.g., FR2 millimeter wave requires more frequent calibration than FR1), enabling optimization between calibration accuracy and power consumption through parameter tuning
2Reliability
If UL gap configuration is made dynamic based on UE capabilities and service requirements, then power efficiency and calibration accuracy improve, but system complexity increases
Solution Approach 1:
The patent enables UE self-service by allowing the UE to autonomously determine its UL gap activation needs based on its capabilities and service requirements. The UE sends activation indications to the base station without requiring complex network-side decisions, simplifying the overall system while maintaining high calibration accuracy through UE-driven dynamic configuration
Solution Approach 2:
The patent implements feedback mechanisms where the UE reports its UL gap preferences and capabilities to the base station, and the base station responds with configured UL gap parameters. This closed-loop feedback system enables dynamic optimization of calibration accuracy while managing system complexity through standardized signaling protocols
3Use of energy by moving object
If UL gaps are activated for power management in FR2, then power amplifier efficiency improves, but communication coverage is reduced due to millimeter wave propagation characteristics
Solution Approach 1:
The patent applies different UL gap configuration parameters for different frequency ranges. For FR2 millimeter wave frequencies, the system configures appropriate UL gap periodicity and duration to maintain power amplifier efficiency while accounting for the shorter wavelength and more sensitive propagation characteristics. The parameters can be adjusted to balance between power efficiency gains from calibration and the inherent coverage limitations of mmWave
Data Source
AI summary
Activating an uplink (UL) gap at a base station may include decoding a user equipment (UE) UL gap capability report received from a UE. A radio resource control (RRC) UL gap configuration may be encoded for transmission to the UE. A power headroom report (PHR) medium access control (MAC) control element (CE) received from the UE may be decoded. The PHR MAC CE may include at least one of a P value or a power management maximum power reduction (P-MPR) value. Decoding the measurement information may include determining that the P value is equal to one or the P-MPR value is greater than zero. Based on determining that the P value is equal to one or the P-MPR value is greater than zero, the UL gap configuration may be implicitly activated.