Uplink Power Control for Adaptive TDD Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In Time Division Duplex (TDD) communication systems, existing power control methods fail to adapt effectively to varying interference conditions in flexible Time Division Duplex (TDD) configurations, leading to inconsistent reception reliability for data and control information transmissions.
Innovation Solution
The implementation of two separate UL power control processes for fixed and flexible Time Division Duplex (TDD) configurations, with dynamic indication through DCI formats, allows for UE-specific adaptation of power control parameters based on interference characteristics, ensuring comparable reception reliability for data and control information in both configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single UL power control process is used for both fixed and flexible TDD configurations, then device complexity is reduced, but reception reliability becomes inconsistent across different configuration types
Solution Approach 1:
The patent divides the unified power control process into two separate processes: one for fixed TDD configurations and another for flexible TDD configurations. Each process is independently optimized to handle the specific interference characteristics of its configuration type, thereby resolving the contradiction between device complexity and reception reliability consistency.
2Reliability
If separate UL power control processes are implemented for fixed and flexible TDD configurations, then reception reliability consistency is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic indication mechanisms through DCI formats that enable the UE to adaptively select or adjust power control parameters based on the current TDD configuration type. This dynamic approach allows the system to maintain separate optimized processes for fixed and flexible configurations while managing complexity through efficient signaling rather than rigid structural duplication.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention provides a performed by a user equipment, UE, of controlling uplink, UL, power, the method comprising: receiving configuration information about a first UL power control accumulation state and a second UL power control accumulation state; receiving downlink control information, DCI, comprising transmission power control information and indication information; and determining transmission power for transmitting a physical uplink shared channel, PUSCH, based on the transmission power control information, and the indication information wherein the indication information indicates one of the first UL power control accumulation state or the second UL power control accumulation state.