Global Traffic Technologies, LLC

Unisys Corporation

David John Edwardson

Tyson R Midboe

Kate H Tsai

Shinji Muro

David R Johnson

Kevin Eichhorst

Brian Wegleitner

Charles Griep

David E Wilhelm

Samantha Edwardson

Nicole Maria Montgomery

Patrick Keenan Cosgrove

Kevin Clare Eichhorst

According to the disclosed approaches, a server system receives vehicle messages having information transmitted from vehicle processors. Each vehicle message specifies published geographical coordinates that indicate a geographical location of a vehicle. For each vehicle message, the server system determines one or more virtual phase selectors associated with the published geographical coordinates; determines whether each virtual phase selector is active or inactive; starts execution of each virtual phase selector determined to be in inactive; and communicates the vehicle message to the one or more virtual phase selectors. Each virtual phase selector determines traffic signal control data based on the vehicle message and transmits the traffic signal control data to a traffic signal controller associated with the virtual phase selector. The method includes stopping execution of an executing virtual phase selector in response to absence of a vehicle message having published geographical coordinates associated with the executing virtual phase selector for a period that is greater than a threshold period.

Dynamic activation of virtual phase selectors for control of traffic signal preemption

According to the disclosed approaches, a first processor receives location messages from second processors. Each location message specifies published geographical coordinates that indicate a geographical location, and the published geographical coordinates are a version of actual geographical coordinates truncated from a first level of precision to a second level of precision. The first processor accesses subscriptions to location topics in response to the location messages. Each location topic specifies in the second level of precision, subscribed-to geographical coordinates of a location. The first processor determines whether or not the published geographical coordinates match any of the subscribed-to geographical coordinates. Non-matching location messages are discarded, and matching location messages are transmitted to one or more third processors identified by the subscriptions.

Location-based message distribution

Approaches for monitoring traffic signal preemption at one or more intersections. According to one embodiment, a road map that includes a plurality of roads and intersections is displayed with a computer system. Preemption data periodically received by the computer system from at least one preemption controller at a respective intersection is used to update the road map. In response to the preemption data, the road map is updated to include a traffic signal icon at the respective intersection and a vehicle icon at a location on the map corresponding to a location of a vehicle transmitting a preemption request as indicated by the preemption data.

Monitoring traffic signal preemption

Methods and systems for creating an approach map for a traffic signal preemption controller. A road map is displayed, and in response to user input for instantiating a first segment of an approach map, a first instance of a graphical object overlaying one of the plurality of roads is displayed. The one road represents an approach road to an intersection having the preemption controller. First segment location data that describes a first geographical area bounded by the first segment are determined from size and placement of the first instance of the graphical object on the road map and from location data associated with the one road. The first segment location data are stored in association with the approach map for the preemption controller. The preemption controller, once configured with the first segment location data, initiates traffic signal preemption in response to a preemption request transmitted from within the first geographical area described by the first segment location data.

Defining approach maps for traffic signal preemption controllers

Various approaches for updating system monitoring policy parameters. In one approach, updates to the monitoring policy parameters are transmitted to an event server via an event report. The event server transmits the event report to a subcomponent manager executing on the monitored system. The subcomponent manager determines to which of a plurality of monitoring subcomponents the update is to be applied. The subcomponent manager then suspends the execution thread of the monitoring subcomponents, updates monitoring policy parameters of the subcomponent with data from the event report, and thereafter resumes the execution thread of the subcomponents. The subcomponent then operates with the updated monitoring policy parameters.

Dynamically updating subcomponents in a tiered remote monitoring system

Various approaches for managing a plurality of instances of an object model are disclosed. At least a first and a second instance of the object model are established in first and second data processing systems. Each instance includes a plurality of objects, and each object includes a first attribute that is a globally unique identifier (GUID). Objects are associated other objects of the plurality of objects, and for each association between a first and a second one of the plurality of objects, the first object includes a second attribute that is the GUID of the second object. Established in each system are first and second versions of a data set that includes the GUIDs of the plurality of objects and associated pointers to memory locations of the objects in the first and second memory arrangements.

Replicating of plurality of instances of an object model in memory arrangement using portable object references where each object attribute assigned GUID

Growing community of inventors

Shoreview, MN, United States of America

David John Edwardson