Directional Wireless Beam Search Using Geographical Positioning

Solution Overview

Problem

Wireless communication systems face inefficiencies in directional beam searching and tracking, particularly in millimeter wave technology, due to the need for comprehensive 360-degree searches, which consume significant frequency and time resources.

Innovation Solution

Utilizing known geographical information to constrain and simplify beam searching and tracking processes by determining estimated positions and trajectories of receivers and transmitters, thereby reducing the scope of beam searches and facilitating handovers between transmitters.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If comprehensive 360-degree beam searching is performed to ensure complete coverage, then beam direction accuracy is improved, but time and frequency resources are consumed

Engineering Contradiction:

Improvebeam direction accuracyVSAvoidbeam searching time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The system performs preliminary actions by determining estimated positions of transmitters and receivers using known geographical information before initiating beam searching. This preliminary position estimation constrains the beam search to a limited angular range rather than performing a complete 360-degree search, thereby reducing time and frequency resources while maintaining adequate beam direction accuracy for millimeter wave communications

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If comprehensive 360-degree beam searching is performed to ensure complete coverage, then beam direction accuracy is improved, but frequency resources are consumed

Engineering Contradiction:

Improvebeam direction accuracyVSAvoidfrequency resource consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The system performs preliminary actions by determining estimated positions of transmitters and receivers using known geographical information before initiating beam searching. This preliminary position estimation constrains the beam search to a limited angular range rather than performing a complete 360-degree search, thereby reducing time and frequency resources while maintaining adequate beam direction accuracy for millimeter wave communications

Inventive Principle:

Principle #10Preliminary action

3Loss of time

If beam searching scope is reduced using geographical information, then time and frequency resources are conserved, but beam search completeness may be compromised

Engineering Contradiction:

Improvebeam searching timeVSAvoidbeam search completeness

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

The system performs preliminary actions by determining estimated positions of transmitters and receivers using known geographical information before initiating beam searching. This preliminary position estimation constrains the beam search to a limited angular range rather than performing a complete 360-degree search, thereby reducing time and frequency resources while maintaining adequate beam direction accuracy for millimeter wave communications

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses feedback mechanisms where the estimated position information from geographical data continuously guides and adjusts the beam search process. This feedback ensures that the constrained beam search remains focused on the most probable directions, maintaining search effectiveness and completeness within the reduced angular range

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS9903937B2Using known geographical information in directional wireless communication systems

Publication Date: 2018.02.27 QUALCOMM INC

AI summary

Methods, systems, and apparatuses are described for using known geographical information in directional wireless communication systems. In some aspects, an estimated position of a receiver relative to a transmitter may be determined based at least in part on known geographical information, and a desired beam direction for wireless communication from the transmitter to the receiver may be searched for based at least in part on the estimated position of the receiver.