Dynamic Transmit Power Control for Wireless TxOP Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems often waste resources by transmitting at a fixed maximum power level, which can lead to unnecessary interference and power consumption, especially when devices are close to each other.
Innovation Solution
Implementing dynamic transmit power control, where a wireless device transmits a first message at a maximum power level to reserve a channel, and then adjusts the transmit power for subsequent messages based on optimized transmission parameters and metrics such as energy consumption and channel conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed maximum transmit power level is used for all transmissions, then the data rate and throughput are maximized, but energy consumption increases and interference is generated unnecessarily
Solution Approach 1:
The patent implements dynamic transmit power control where the transmit power is adjusted based on channel conditions, distance, and transmission requirements. The system transitions from a static maximum power level to a dynamic power level that adapts to real-time conditions, resolving the contradiction between maintaining high data rates and reducing energy consumption.
Solution Approach 2:
The patent changes the transmit power parameter dynamically based on channel state information, distance measurements, and transmission priority. By adjusting this key parameter rather than maintaining a fixed value, the system achieves both energy efficiency and adequate data rates according to actual needs.
2Reliability
If a fixed maximum transmit power level is used for all transmissions, then reliable communication is ensured, but interference to other devices increases unnecessarily
Solution Approach 1:
The patent applies different transmit power levels to different transmission scenarios based on local conditions such as distance, channel quality, and receiver capabilities. Instead of using a uniform maximum power level everywhere, the system tailors the power level to each specific transmission context, reducing interference while maintaining reliability.
Solution Approach 2:
The system dynamically adjusts transmit power based on real-time channel conditions and interference levels. This dynamic adaptation allows the system to maintain communication reliability when needed while minimizing interference generation in conditions where lower power suffices.
3Use of energy by moving object
If transmit power is reduced to save energy, then energy consumption decreases, but the data rate and communication reliability may deteriorate
Solution Approach 1:
The patent employs multiple transmission parameters including modulation and coding scheme (MCS), bandwidth, number of spatial streams, and transmit power. By jointly optimizing these parameters rather than solely relying on power reduction, the system maintains data rate while achieving energy savings through efficient parameter selection.
Solution Approach 2:
The system performs preliminary optimization of transmission parameters before actual data transmission. By pre-selecting optimal parameters based on channel conditions and transmission requirements, the system ensures that energy-saving transmissions still meet data rate targets, avoiding the need for reactive power increases.
4Duration of action of moving object
If transmit power is reduced to save energy, then battery life is prolonged, but communication reliability may be compromised
Solution Approach 1:
The patent uses joint optimization of multiple transmission parameters to achieve energy efficiency without compromising reliability. By coordinating power level with MCS, bandwidth, and spatial streams, the system maintains adequate signal quality and error rates even at reduced power levels, thus preserving communication reliability while extending battery life.
Solution Approach 2:
The system implements feedback mechanisms where transmission outcomes are monitored and used to adjust subsequent transmission parameters. This feedback loop ensures that when power is reduced to save energy, the system can detect and correct any reliability degradation by adjusting parameters in real-time.
Data Source
AI summary
This disclosure provides methods, components, devices and systems for dynamic transmit power control. Some aspects more specifically relate to dynamically enable transmit power during a transmission opportunity (TxOP) to minimize the transmit power being used for message transmissions. In some implementations, a wireless device may transmit, at a first transmit power, a first message that indicates that the wireless device will transmit one or more second messages during a TxOP. The wireless device may select a second transmit power for the second message(s) and a plurality of transmission parameters, wherein the second transmit power satisfies a metric for the one or more second messages. The wireless device may transmit the second message(s) during the TxOP at the second transmit power and in accordance with respective values of the plurality of transmission parameters.