Wi-Fi Access Point Beam Switching for Energy-Efficient Coverage

Solution Overview

Problem

Providing Wi-Fi coverage in large open spaces with high user density is challenging due to energy inefficiency from deploying numerous APs, and fluctuating user density leads to unnecessary energy consumption when all APs are kept active.

Innovation Solution

Deploy APs with configurable antenna beams that switch between narrow-beam and wide-beam modes based on user density, using a centralized network-management system to dynamically adjust the operating mode of APs, placing underutilized APs in a deep-sleep mode to conserve energy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If multiple APs are deployed to provide Wi-Fi coverage in large open spaces, then coverage area is improved, but energy consumption increases

Engineering Contradiction:

Improvecoverage areaVSAvoidenergy consumption

Core Design Contradiction:

Area of stationary objectVSUse of energy by stationary object

Solution Approach 1:

The patent implements dynamic beam width adjustment where antennas can switch between narrow-beam and wide-beam modes based on real-time user density detection. This dynamic configuration allows the system to optimize the balance between coverage area and energy consumption by adapting antenna characteristics to current network conditions rather than maintaining a fixed configuration.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the beam width parameter of the antenna system based on user density thresholds. When user density is high, narrow beams are used to concentrate signal in specific areas; when user density is low, wide beams are used to expand coverage area. This parameter adjustment resolves the contradiction by making the system adaptable to varying operational requirements.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If all APs are kept active to maintain comprehensive coverage, then service reliability is improved, but energy consumption increases

Engineering Contradiction:

Improveservice coverageVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by stationary object

Solution Approach 1:

The system dynamically adjusts the operational state of APs based on real-time user density detection. When user density falls below a threshold, the system transitions APs from active narrow-beam mode to inactive wide-beam mode, creating a dynamic operational profile that maintains reliability only where needed while conserving energy elsewhere.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The network management system automatically detects user density patterns and makes intelligent decisions about which APs to keep active without manual intervention. The system monitors its own performance and self-adjusts the operational configuration of APs, eliminating the need for continuous manual monitoring while maintaining optimal service coverage.

Inventive Principle:

Principle #25Self-service

3Productivity

If APs with narrow-beam antennas are used to support high user density, then user capacity is improved, but coverage area decreases

Engineering Contradiction:

Improveuser capacityVSAvoidcoverage area

Core Design Contradiction:

ProductivityVSArea of stationary object

Solution Approach 1:

The patent implements dynamic beam width adjustment where antennas can switch between narrow-beam and wide-beam modes based on real-time user density detection. This dynamic configuration allows the system to optimize the balance between coverage area and energy consumption by adapting antenna characteristics to current network conditions rather than maintaining a fixed configuration.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the beam width parameter of the antenna system based on user density thresholds. When user density is high, narrow beams are used to concentrate signal in specific areas; when user density is low, wide beams are used to expand coverage area. This parameter adjustment resolves the contradiction by making the system adaptable to varying operational requirements.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12581405B2Method and system for increasing energy efficiency in a wireless network

Publication Date: 2026.03.17 HEWLETT PACKARD ENTERPRISE DEV LP

AI summary

A system and method for configuring a plurality of access points (APs) providing service coverage to a space is described. The system determines a number of users in the space. Responsive to the number of users exceeding a predetermined threshold, the system can place the plurality of APs in a high-power mode and cause an antenna of each AP to operate in a narrow-beam mode. Responsive to the number of users being below the threshold, the system selects a subset of APs from the plurality of APs and causes an antenna of each AP in the subset to operate in a wide-beam mode. Each AP in the subset remains in the high-power mode, and the wide-beam mode has a wider radiation pattern in a horizontal plane than the narrow-beam mode. The system places the remaining APs in a power-saving mode, thereby reducing energy consumption while maintaining service coverage.