Wireless Transmit Power Control via TPC Feedback
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Solution Overview
Problem
In wireless communication systems, especially in Peer-to-Peer (P2P) environments, there is a need for effective transmit power control to balance signal strength and interference, ensuring good call quality and maximizing subscriber capacity, as current methods do not adequately consider battery state or power management modes.
Innovation Solution
A method and apparatus for controlling transmit power in P2P communication environments, where devices adjust their power based on received power mode information, transmit power information, and link margin, using TPC request and report messages to synchronize power modes and adjust transmit power levels, optimizing power consumption and call quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmit power is increased to improve call quality, then signal strength is improved, but interference to other wireless terminals increases causing poor call quality for other subscribers
Solution Approach 1:
The patent implements a feedback mechanism where wireless terminals report received power levels and power mode information to the base station. The base station uses this feedback to calculate appropriate transmit power adjustments and sends TPC commands back to terminals, creating a closed-loop control system that balances call quality with interference mitigation.
Solution Approach 2:
The patent changes the transmit power parameter dynamically based on multiple factors including power mode (normal, power saving, low power battery), distance from base station, and interference conditions. By adjusting the power parameter adaptively rather than using a fixed value, the system optimizes both call quality and interference reduction.
2Object-generated harmful factors
If transmit power is decreased to reduce interference, then interference to other terminals is reduced, but call quality of the terminal decreases
Solution Approach 1:
The feedback mechanism allows the base station to receive information about terminal conditions and adjust power levels accordingly. Terminals report their power modes and received signal levels, enabling the base station to determine the minimum necessary power to maintain call quality while minimizing interference.
Solution Approach 2:
The patent makes the transmit power dynamic rather than static. Power levels are continuously adjusted based on real-time conditions including terminal mobility, changing interference environments, and battery status, allowing the system to maintain optimal performance across varying operating conditions.
3Productivity
If power control is implemented in P2P environment without considering battery state, then power control can be performed, but current consumption is not minimized and battery life is reduced
Solution Approach 1:
The patent performs preliminary classification of terminals into power modes (normal, power saving, low power battery) before executing power control. This preliminary action allows the system to pre-determine appropriate power levels and control strategies based on battery status, preventing excessive power consumption before it occurs.
Solution Approach 2:
The patent applies different power control strategies to different terminals based on their local conditions, particularly their battery state and power mode. Rather than using a uniform power control approach for all terminals, the system tailors power management to each terminal's specific energy constraints and operational requirements.
4Device complexity
If uniform power control is applied to all terminals, then implementation is simple, but it cannot resolve fading differences between terminals and maximize subscriber capability
Solution Approach 1:
The patent implements local quality by applying individualized power control to each terminal based on its specific conditions including distance from base station, fading characteristics, power mode, and battery status. Each terminal receives customized TPC commands tailored to its local environment rather than uniform control.
Solution Approach 2:
The power control system is dynamic and adapts to each terminal's changing conditions. As terminals move through different fading environments or change battery status, the system continuously adjusts power levels individually for each terminal, maintaining optimal performance without requiring complex manual configuration.
Data Source
AI summary
Methods and apparatuses are provided for adjusting a transmit power at a first electronic device. A first Transmit Power Control (TPC) request message, including power mode information of the first electronic device, is transmitted from the first electronic device to a second electronic device. The first electronic device receives a first TPC report message, including power mode information of the second electronic device, transmit power information of the second electronic device, and link margin information for the first electronic device, from the second electronic device. The first electronic device adjusts the transmit power according to the power mode information of the second electronic device, using the transmit power information and the link margin information included in the first TPC report message.