Wireless Access Point Dynamic Power Saving for Throughput and Latency

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Solution Overview

Problem

Existing wireless network technologies lack effective power saving mechanisms for access points (APs) that can maintain performance while reducing power consumption, especially in latency-sensitive applications like augmented reality and unmanned vehicles.

Innovation Solution

The implementation of a dynamic power saving (DPS) mode for APs, where they operate with reduced parameters by default and can transition to enhanced parameters upon request, using frames to manage transitions and maintain performance during transmission opportunities (TXOPs).

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If AP operates with reduced parameters to save power, then power consumption is reduced, but network performance (throughput and latency) deteriorates

Engineering Contradiction:

Improvepower consumptionVSAvoidnetwork performance

Core Design Contradiction:

Use of energy by moving objectVSProductivity

Solution Approach 1:

The AP dynamically adjusts its operating parameters between reduced and enhanced sets based on real-time conditions. The system transitions from static power saving modes to dynamic parameter adjustment, allowing the AP to switch between different operational states (reduced vs enhanced parameters) to optimize both power consumption and network performance according to current traffic demands and application requirements.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes physical operating parameters of the AP including channel width, modulation and coding schemes (MCS), spatial streams, and physical layer versions. By dynamically modifying these parameters between reduced and enhanced sets, the system resolves the contradiction by allowing parameter optimization for both power efficiency and performance based on instantaneous network conditions.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If AP transitions between operating parameter sets, then adaptability is improved, but transition time and complexity increase

Engineering Contradiction:

Improveoperational flexibilityVSAvoidtransition time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The AP performs preliminary actions by notifying STAs of upcoming parameter set transitions in advance. The system sends notification frames to STAs before actually switching parameter sets, allowing STAs to prepare for the transition and maintain synchronized operation. This reduces the effective transition time impact on network performance by coordinating changes proactively rather than reactively.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements feedback mechanisms where the AP monitors network conditions and STA capabilities, then adjusts parameter transitions accordingly. The AP receives feedback from STAs about their ability to handle transitions and uses this information to optimize transition timing and parameter selection, minimizing transition time while maintaining adaptability.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250234288A1Dynamic power saving operation

Publication Date: 2025.07.17 SAMSUNG ELECTRONICS CO LTD

AI summary

An access point (AP) in a wireless network that operates in different operating modes to save power, including a dynamic power saving (DPS) mode where the AP operates with a reduced operating parameter set or with an enhanced operating parameter set, the operating parameters include a bandwidth, number of spatial streams (NSS), and modulation coding scheme (MCS).