Closed-Loop Power Control for WLAN SIFS Burst Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication systems, particularly in Wi-Fi networks, face limitations in power control during short interframe space (SIFS) bursts due to the inadequacy of open-loop power control techniques, leading to packet failures and disruptions.
Innovation Solution
Implementing closed-loop power control techniques that provide feedback for adjusting transmit power levels or modulation and coding schemes (MCS) during SIFS bursts, enabling nodes to adjust power levels based on received feedback for subsequent data packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If open-loop power control techniques are used during SIFS bursts, then power consumption may be reduced, but packet error rate increases and transmission reliability deteriorates
Solution Approach 1:
The patent implements closed-loop power control by having the receiving node measure the received signal strength of each data packet in the SIFS burst and send power control feedback to the transmitting node. The transmitting node adjusts the transmit power of subsequent packets based on this feedback, achieving both power optimization and reliable transmission by continuously adapting to actual channel conditions.
Solution Approach 2:
The patent makes the power control system dynamic by adjusting transmit power in real-time during the SIFS burst based on measured channel conditions and received feedback. Instead of using fixed or pre-determined power levels, the system continuously adapts power levels to match actual transmission requirements, resolving the contradiction between power savings and reliability.
2Device complexity
If open-loop power control techniques are used during SIFS bursts, then device complexity is reduced, but transmission stability deteriorates due to reactive power adjustments
Solution Approach 1:
The patent introduces a feedback mechanism where the receiving node measures received signal strength and communicates power control information back to the transmitting node. This feedback loop enables proactive power adjustment before transmission issues occur, improving transmission stability without requiring complex autonomous decision-making at the transmitting node.
Solution Approach 2:
The patent uses power control feedback messages as an intermediary to transfer channel quality information from the receiving node to the transmitting node. This intermediary mechanism allows the system to achieve stable, coordinated power control without requiring direct complex interactions or autonomous algorithms at either end, balancing simplicity and stability.
3Use of energy by moving object
If transmit power is reduced to save energy during SIFS bursts, then power consumption decreases, but channel utilization efficiency worsens due to packet failures
Solution Approach 1:
The patent dynamically adjusts transmit power during the SIFS burst based on actual channel conditions and received feedback. The system transitions from static power levels to adaptive power control, optimizing the balance between power consumption and successful packet delivery, thereby improving channel utilization efficiency without excessive power consumption.
Solution Approach 2:
The patent changes the transmit power parameter in response to measured channel conditions and received feedback. By adjusting this key parameter based on actual transmission performance and channel quality, the system achieves optimal power efficiency while maintaining high channel utilization through successful packet delivery.
Data Source
AI summary
Methods and apparatuses for providing closed-loop power control during a short inter-frame space (SIFS) burst are described herein. A method includes receiving feedback associated with transmit power used to transmit a first data packet in a SIFS burst. The method also includes adjusting at least the transmit power, or a modulation and coding scheme (MCS), or a combination thereof, used to transmit a second data packet of the SIFS burst based at least in part on the received feedback.