Adaptive Periodic Power-Save Polling for WLAN Delay
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing Power-Save Polling mechanism in WLAN technologies experiences delays that exceed the stringent delay bounds required for Quality of Service (QoS) applications like VoIP, leading to potential performance pitfalls due to inefficient periodic PS-Polling intervals and timing.
Innovation Solution
Adaptive Periodic Power-Save Polling (APPS-Polling) logic is implemented, which determines a timer value for periodic PS-Polling by monitoring packet arrival periodicity and adjusts the start time of PS-Polls to minimize buffering time at the access point, ensuring timely data delivery while conserving power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If periodic PS-Polling is implemented to reduce delay, then QoS data delivery delay is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the PS-Poll interval adaptive rather than fixed. The station dynamically adjusts the polling interval based on observed packet arrival patterns at the access point, transitioning from static periodic polling to dynamic adaptive polling that responds to actual traffic conditions, thereby reducing unnecessary wake-ups and power consumption while maintaining QoS requirements
Solution Approach 2:
The patent implements feedback mechanisms where the station monitors packet arrival times at the access point and uses this information to adjust the PS-Poll interval. The station receives feedback about actual packet arrival patterns and modifies its polling behavior accordingly, creating a closed-loop system that optimizes both delay performance and power consumption
2Device complexity
If fixed periodic PS-Polling interval is used, then implementation simplicity is improved, but delay performance deteriorates
Solution Approach 1:
The patent applies self-service by enabling the station to automatically monitor its own packet arrival patterns and adjust its polling interval without external intervention. The station independently analyzes packet arrival times and autonomously modifies its PS-Poll behavior, eliminating the need for complex centralized control while achieving optimal delay performance
3Use of energy by moving object
If PS-Poll interval is increased to save power, then power consumption is reduced, but data delivery delay increases
Solution Approach 1:
The patent applies parameter changes by modifying the PS-Poll interval parameter dynamically based on observed packet arrival patterns. Instead of using a fixed interval, the system changes the polling parameter in response to actual traffic conditions, adjusting it to match the actual packet arrival rhythm and thereby optimizing the balance between power savings and delay performance
Data Source
AI summary
In accordance with at least some embodiments, a system includes an access point and a station in communication with the access point. The station selectively implements adaptive periodic Power-Save (APPS)-Polling logic for communications between the station and the access point. The APPS-Polling logic is configured to determine a timer value for periodic PS-Polling by monitoring a periodicity of arrival packets for at least a threshold amount of time.