Uplink Power Control Loops for CLI and Non-CLI TDD Slots
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Solution Overview
Problem
Current wireless communication technologies, such as those specified in the technical field, fail to effectively address the issue of managing uplink power control for dynamic time-division duplex (TDD) and subband full duplex (SBFD) in mobile communications, as evidenced by the lack of separate uplink power control loops for slots experiencing cross-link interference (CLI) and non-CLI slots, leading to inefficient signal-to-interference-and-noise ratio (SINR) and power wastage.
Innovation Solution
Implementing separate uplink power control loops for CLI and non-CLI slots by defining additional power control parameters and bitmaps to manage power control for different slot types, including CG and DG PUSCH, PUCCH, and SRS transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate uplink power control loops are implemented for CLI slots and non-CLI slots, then uplink SINR is improved and power wastage is reduced, but device complexity increases due to additional power control parameters and control loops
Solution Approach 1:
The patent segments the uplink power control system into separate control loops for CLI slots and non-CLI slots. This is achieved by introducing separate power control parameters (e.g., p0-NominalWithoutGrant1 for CLI slots, p0-NominalWithoutGrant2 for non-CLI slots) and independent TPC command accumulation mechanisms, allowing independent optimization of power control for each slot type to improve SINR while managing complexity through structured parameter organization
Solution Approach 2:
The patent applies local quality by tailoring power control parameters specifically for different slot types. CLI slots receive one set of power control parameters optimized for interference-prone conditions, while non-CLI slots receive another set optimized for lower interference conditions. This localized optimization ensures each slot type operates at optimal power levels, improving overall SINR while avoiding unnecessary power transmission in non-CLI slots
2Device complexity
If a single uplink power control loop is used for all slots, then device complexity is reduced, but uplink performance deteriorates due to inability to optimize for different interference conditions
Solution Approach 1:
The patent introduces dynamic power control by enabling independent TPC command accumulation for CLI and non-CLI slots. The network can dynamically adjust power control parameters based on real-time interference conditions, allowing the system to adapt to changing CLI presence and optimize power levels dynamically, improving SINR while maintaining manageable complexity through dynamic rather than static control
3Reliability
If uplink power control is optimized for CLI slots, then SINR on CLI slots is improved, but power wastage occurs on non-CLI slots due to conservative power settings
Solution Approach 1:
The patent segments power control into separate loops, allowing non-CLI slots to have their own power optimization independent of CLI slot requirements. Non-CLI slots can use higher power levels optimized for their lower-interference conditions without compromising CLI slot performance, while CLI slots receive conservative power settings tailored to their interference-prone characteristics, eliminating power wastage
Solution Approach 2:
The patent applies different power control quality characteristics to different slot types. Non-CLI slots receive power control optimized for maximum throughput with minimal interference, while CLI slots receive power control optimized for reliability under interference conditions. This local optimization ensures each slot type operates at its optimal power level, preventing energy wastage while maintaining SINR performance
Data Source
AI summary
Techniques pertaining to efficient uplink (UL) power control for dynamic time-division duplex (TDD) and subband full duplex (SBFD) in mobile communications are described. A user equipment (UE) performs an UL transmission with TDD in an SBFD network (including dynamic TDD and SBFD). The UE separately controls UL transmit powers used in performing the UL transmission on cross-link interference (CLI) slots and on non-CLI slots.