Multi-Phase Uplink Power Control Across Distributed Relay Networks
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Solution Overview
Problem
In distributed wireless communication systems, uncoordinated power control commands from multiple base stations and relay stations lead to suboptimal system performance, increased power consumption, and interference, making it challenging to maintain desired quality of service and signal-to-interference-plus-noise ratio.
Innovation Solution
Implementing a multi-phase power control method with independent power control loops for each phase, using open and closed loop power control, and coordinating power control commands through explicit or implicit signaling to optimize transmissions to different sets of nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uncoordinated power control commands are used from multiple base stations and relay stations, then each node can independently optimize its own signal-to-interference-plus-noise ratio, but overall system performance deteriorates and power consumption increases
Solution Approach 1:
The patent merges multiple independent power control loops into a coordinated system where base stations and relay stations share power control information and cooperate to determine transmit power levels. This combination resolves the contradiction by achieving both individual SINR optimization and overall system performance improvement through joint decision-making.
Solution Approach 2:
The patent implements feedback mechanisms where power control commands from multiple nodes are collected, processed, and used to adjust transmit powers in a coordinated manner. This feedback loop enables the system to achieve both individual node SINR targets and optimal overall system performance by continuously adapting to changing conditions.
2Ease of operation
If uncoordinated power control commands are used from multiple base stations and relay stations, then each node can independently control its transmission, but interference increases and power consumption increases
Solution Approach 1:
The patent introduces a coordinating mechanism that acts as an intermediary between multiple base stations and relay stations. This intermediary collects power control commands, resolves conflicts, and coordinates transmit power levels to reduce interference while maintaining independent transmission control capabilities for each node.
3Reliability
If uncoordinated power control commands are used from multiple base stations and relay stations, then each node can independently optimize its signal quality, but power consumption increases
Solution Approach 1:
The patent combines multiple independent power control decisions into a coordinated approach where nodes share information about signal quality requirements and power consumption constraints. This merging enables the system to achieve desired signal quality while optimizing overall power consumption by avoiding redundant power increases from multiple nodes.
Data Source
AI summary
A method and apparatus for power control for distributed wireless communication is disclosed including one or more power control loops associated with a wireless transmit/receive unit (WTRU). Each power control loop may include open loop power control or closed loop power control. A multi-phase power control method is also disclosed with each phase representing a different time interval and a WTRU sends transmissions at different power levels to different set of node-Bs or relay stations during different phases to optimize communications.