U.S. flag

An official website of the United States government

Government Website

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Safely connect using HTTPS

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Breadcrumb

  1. Home
  2. News
  3. Publication Library
  4. S&T FRG WEA Arbitrary Size Location Aware Targeting

Archived Content

In an effort to keep DHS.gov current, the archive contains outdated information that may not reflect current policy or programs.

WEA - Arbitrary-Size Location-Aware Targeting

This document describes research being done on a new Wireless Emergency Alerts (WEA) geotargeting mechanism by the Johns Hopkins University Applied Physics Laboratory (JHU/APL). This work was undertaken with the support of the U.S. Department of Homeland Security (DHS) Science and Technology Directorate (S&T). The WEA service provides the ability to send geographically targeted text alerts to the public. However, the current WEA geotargeting mechanism is limited by the relatively coarse granularity of cellular network sites. JHU/APL investigated methods of improving the geotargeting accuracy of WEA.

The new WEA geotargeting mechanism is called Arbitrary-Size Location-Aware Targeting (ASLAT). This document compares the performance of the new mechanism with existing WEA geotargeting, discusses the requirements for the new mechanism and identifies the required changes to existing WEA standards. ASLAT utilizes the location awareness of mobile devices to improve geotargeting accuracy.

Attachment Ext. Size Date
Wireless Emergency Alerts Arbitrary-Size Location-Aware Targeting PDF 1.80 MB
Last Updated: 01/19/2022
Was this page helpful?
This page was not helpful because the content