CoMP Joint Transmission Uplink Power Control With Waveform Selection
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Solution Overview
Problem
Existing wireless communication systems, particularly in new radio (NR) technologies, face challenges in optimizing power control for coordinated multipoint joint transmission, which affects communication efficiency and interference management.
Innovation Solution
The system employs dynamic power control methods for UEs to select between CP-OFDM and DFT-S-OFDM waveforms for SRS transmission, coordinated by network entities to optimize transmission power and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic power control is implemented for coordinated multipoint joint transmission, then communication efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic power control by enabling UEs to select between CP-OFDM and DFT-S-OFDM waveforms based on channel conditions and traffic types. The network entities dynamically adjust transmission power and waveform selection for coordinated multipoint joint transmission, transforming a static power control system into an adaptive one that responds to real-time channel variations and service requirements
Solution Approach 2:
The patent changes multiple parameters simultaneously including waveform type selection, transmission power levels, and resource allocation configurations for coordinated multipoint transmission. By adjusting these parameters dynamically based on channel quality indicators and service requirements, the system optimizes communication efficiency while managing the complexity through structured parameter adjustment protocols
2Reliability
If transmission power is increased for coordinated multipoint joint transmission, then signal quality is improved, but interference to other users increases
Solution Approach 1:
The patent applies local quality by allowing different UEs to use different waveforms (CP-OFDM or DFT-S-OFDM) and different power levels based on their specific channel conditions, device capabilities, and service requirements. Each UE receives customized power control parameters from the network entity, enabling localized optimization of signal quality without uniformly increasing power across all users, thereby reducing overall interference
Solution Approach 2:
The patent implements feedback mechanisms where UEs report channel quality indicators, waveform performance metrics, and interference levels to the network entity. The network entity uses this feedback to dynamically adjust transmission power and waveform selection for coordinated multipoint joint transmission, creating a closed-loop system that balances signal quality improvement with interference control
Data Source
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AI summary
Certain aspects of the present disclosure relate to methods and apparatus for power control in coordinated multipoint (CoMP) scenarios that utilize joint transmission (JT). For example, a method for power control at a base station, may include receiving an indication, from at least one of a plurality of paired UEs served by a set of base stations using a common set of time/frequency resources, of a parameter relating to an uplink reference signal used for transmitting an uplink reference signal.