Browse Prior Art Database

Method for optimal audio routing for PSI Dual Device public safety users

IP.com Disclosure Number: IPCOM000200952D
Original Publication Date: 2010-Nov-01
Included in the Prior Art Database: 2010-Nov-01
Document File: 3 page(s) / 278K

Publishing Venue

Motorola

Related People

Pappas, Scott: INVENTOR [+4]

Abstract

Much work has been done defining the communications use cases for the public safety officer. Recent studies indicate that most public safety users carry two devices for communications. This research also indicates that there is value in providing “back-up PTT” functionality such that users would be able to receive public safety related communications via either device/network. Traditional narrowband networks and devices obviously carry the bulk of public safety communications, but customers view the public network as an asset that could provide back-up communications if the narrowband LMR network is not available (ie. Not in coverage area). Further, there are cellular only users that have a need to occasionally interoperate with narrowband public safety users. With the usage of a primary and secondary device for public safety communications, there exists a set of problems surrounding the routing of received audio to the applicable device. This publication describes a method to intelligently route audio to the public safety officer’s primary or secondary device based upon a set of conditions.

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Method to intelligently enable/disable audio in a 2nd public safety broadband device

By Dan Loeger, Jim Nowakowski, Scott Pappas, Matt Weiner

Motorola Solutions, Inc.

Worldwide Radio Solutions

 

ABSTRACT

Much work has been done defining the communications use cases for the public safety officer.  Recent studies indicate that most public safety users carry two devices for communications.  This research also indicates that there is value in providing back-up Push-To-Talk (PTT) functionality such that users would be able to receive public safety related communications via either device/network. Traditional narrowband networks and devices obviously carry the bulk of public safety communications, but customers view the public network as an asset that could provide back-up communications if the narrowband Land Mobile Radio network is not available (ie. Not in coverage area).  Further, there are cellular only users that have a need to occasionally interoperate with narrowband public safety users.

With the usage of a primary and secondary device for public safety communications, there exists a set of problems surrounding the routing of received audio to the applicable device.  This publication describes a method to intelligently route audio to the public safety officer’s primary or secondary device based upon a set of conditions.

PROBLEM

Historically, public safety officers utilize narrowband LMR devices for their mission critical voice communications.  Thus, audio is terminated at only one device on their person.  Even when multiple officers are in the same vicinity receiving the same call, it is not generally an issue as they are using the same network and class of devices having similar delay and audio characteristics. 

Providing the user with the ability of having a “back-up PTT” functionality using alternate networks and devices solves a set of problems, but creates some new issues as well.  There is a practical problem with Dual Device public safety user receiving communications on both devices. The same call received by both devices will be played out by both, creating a distracting situation that will affect the officer’s ability to understand the content of the call.  This is due to the fact that the same call is carried by different networks, each having different delay and other degradation characteristics. Listening to both audio streams simultaneously can be annoying at best and can drama...