Paul Edward Bell

US Patent:

7912498, Mar 22, 2011

Filed:

Mar 6, 2007

Appl. No.:

11/682559

Inventors:

Paul G. Bell - Cary IL, US
Robert J. Armstrong - Chicago IL, US
George R. Economy - Arlington Heights IL, US

Assignee:

Motorola Solutions, Inc. - Schaumburg IL

International Classification:

H04M 1/00

US Classification:

4555531, 455445, 4554261

Abstract:

A method and apparatus are provided for reducing truncation of time sensitive information such as audio in a trunked radio system having a plurality of zone controllers. The method includes the steps of receiving a call request from a calling radio or wireline console by a controlling zone controller of the plurality of zone controllers and measuring a time necessary to set up a call connection between the controlling zone controller and a plurality of called radios or wireline consoles where the call connections of the plurality of called radios or wireline consoles are each set up through a different participating zone controller of the plurality of zone controllers. The method also includes the steps of determining a largest relative measured time among the measured times and buffering audio information from the calling radio for a time period proportional to the determined largest relative time.

US Patent:

8194539, Jun 5, 2012

Filed:

Jun 27, 2007

Appl. No.:

11/769384

Inventors:

Jens Jakobsen - Malmo, SE
Paul G. Bell - Cary IL, US
Brian R. Poe - Cary IL, US

Assignee:

Motorola Solutions, Inc. - Schaumburg IL

International Classification:

H04J 1/16

US Classification:

370230, 370252

Abstract:

A system and method for monitoring congestion in a communication system including an external packet switched network. The communication system includes a plurality of interconnected host devices, such as base stations, consoles, zone controllers. To determine the presence of congestion on links between a pair of host devices, a series of sequential packets are transmitted between the pair. The sequentially transmitted packets are then monitor fluctuations in transmission delays and lost packets. These two criteria are used to identify congestion levels present on the various links in the communication system, and communications on the relevant interzone link are controlled based on the identified congestion level.

US Patent:

20120170447, Jul 5, 2012

Filed:

Jan 4, 2011

Appl. No.:

12/984298

Inventors:

PAUL G. BELL - CARY IL, US
JEFFERY T. ESCHBACH - CHICAGO IL, US
SONUM MATHUR - SAN JOSE CA, US

Assignee:

MOTOROLA SOLUTIONS, INC. - Schaumburg IL

International Classification:

H04B 1/74
H04L 12/56

US Classification:

370218, 370217, 370390, 370216

Abstract:

Communication systems and methods are presented for aggregating sites when connectivity to a core and zone controller therein is lost. A local controller provides multicast control to sub-sites within a locally aggregated network after detecting loss of connectivity to the core. The local controller assigns different multicast addresses than multicast addresses assigned by the zone controller. A sparse and dense mode protocol is used for multicast traffic outside and within the locally aggregated network, respectively. Conventional resources, but not trunked resources, are assigned addresses and groups. An isolated site is able to connect to the network in the event of core failure so that conventional multicast traffic traverses a direct link between each isolated site and the network, thereby extending the locally aggregated network. Multicast addresses available to be assigned by a local controller within any locally aggregated networks can be the same as those assigned by other local controllers.