Configured Uplink Grant Power Control with Pathloss Reference Updates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power control mechanisms for configured uplink grants in wireless communication systems, such as those in 5G networks, face challenges in efficiently managing power levels to optimize data transmission and minimize interference, particularly in heterogeneous networks with varying traffic loads and device capabilities.
Innovation Solution
Implementing a power control mechanism that dynamically adjusts power levels based on traffic characteristics, device capabilities, and network conditions, using MAC CEs to manage power settings for configured uplink grants, ensuring optimal transmission power for wireless devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If power control mechanisms are implemented for configured uplink grants, then data transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The patent changes power control parameters dynamically by introducing a new parameter β_offset configured via MAC CE to adjust the pathloss compensation factor. This allows the network to optimize uplink power levels by modifying parameter values based on traffic characteristics and channel conditions, thereby improving transmission efficiency without requiring complex structural changes to the power control mechanism.
2Object-generated harmful factors
If power levels are dynamically adjusted based on traffic characteristics, then interference is reduced, but control signaling overhead increases
Solution Approach 1:
The patent employs periodic power control adjustments where MAC CEs are transmitted at specific intervals or triggered by certain events (e.g., when power adjustments are needed). This periodic action allows the system to reduce interference dynamically while avoiding continuous control signaling, thus balancing interference reduction with acceptable signaling overhead.
Solution Approach 2:
The power control mechanism enables the UE to autonomously adjust its transmit power based on configured parameters and pathloss measurements. The UE calculates the required power using the formula P = min{P_max, P_0 + α × PL + Δ}, where Δ includes the β_offset adjustment. This self-service approach reduces the need for frequent network-controlled adjustments, thereby minimizing control signaling overhead while maintaining interference reduction capabilities.
3Productivity
If power control is optimized for heterogeneous networks with varying traffic loads, then network performance is improved, but ease of operation decreases
Solution Approach 1:
The patent creates a universal power control framework that can handle diverse traffic characteristics (e.g., eMBB, URLLC, mMTC) through a single configurable mechanism. The MAC CE-based β_offset configuration allows the same power control formula to be adapted for different service types and network conditions, improving network performance across heterogeneous scenarios without requiring separate operation procedures for each case.
Data Source
AI summary
A wireless device may receive one or more radio resource control (RRC) messages comprising one or more configuration parameters. The one or more configuration parameters may comprise (i) a sounding reference signal (SRS) resource indicator (SRI), for a configured uplink grant, indicating an SRI-physical uplink shared channel (PUSCH) power control parameter set and (ii) a pathloss reference signal update parameter enabling an activation command to update pathloss reference signals of an uplink channel. In response to the one or more configuration parameters comprising the pathloss reference signal update parameter, the wireless device may determine a transmission power for a transport block of the configured uplink grant based on a pathloss reference signal mapped to the SRI-PUSCH power control parameter set. The wireless device may transmit the transport block with the transmission power.