International Business Machines Corporation

Stephen Brady

James Sargent Lipscomb

Shu-Ping Chang

Edith H Stern

Barry Edward Willner

Asser Nasreldin Tantawi

Colin George Harrison

Naga A Ayachitula

Alan G Ganek

Frank L Stein

Gopalaswamy Soora

Davis A Foulger

Marc A Block

Thomas E Newman

Barry Marks

An embodiment of the invention is a method of accurately determining the spatial location of an RFID tag in two-dimensions or three-dimensions. The method utilizes a plurality of RFID readers to make a plurality of distance, direction, and or time-of-flight determinations. Such determinations are made by sending a request signal from one of the plurality of RFID readers and listening for a response signal from an RFID tag received at each of the plurality of RFID readers. Correction factors are then determined and the time-of-flight factors adjusted. The adjusted time-of-flight factors are then used to determine more accurately the distances between the RFID tag and each of the plurality of RFID readers. These more accurate distance measurements are then used to determine the spatial location of the RFID tag.

Spatially locating RFID tags using multiple readers and correction factors

In a networked system having a protected central server network connected to one or more satellite servers, the central server includes master data, and each satellite system includes replicated data derived from the master data. A corruption of at least a portion of the replicated data in one of the satellite servers is determined. Responsive to determining the corruption, at least the corrupted portion of the replicated data is replaced in the satellite server with data derived from the master data of the central server.

Method to maintain the integrity of remote data by making it disposable

System for maintaining the integrity of remote data by making it disposable

An apparatus and means enabling a user to operate across multiple service domains using a single IDENTIFIER, ID. A Cross Service Association Domain mapping system is used to allow the desired IDENTIFIER and common user integration. A user is able to employ a single appropriate ID to access any of a plurality of services. The apparatus associates and relates all the IDENTIFIERs associated with each common user by maintaining an image of all the IDENTIFIERs for each user for all that user's applications which bridge the service and/or domain boundaries. Once a user is identified with any of the associated user IDENTIFIERs, the means allows the connection and/or routing to and from even otherwise disparate services. Included are a method, apparatus, and architecture which satisfies the above requirements while providing domain service interrelation and a common user image for the resulting interrelation. It provides for real time collaboration for cooperative, shared, and adaptive service network entities. The invention is used to advantage in many existent and developing service and user applications including applications for service support, cross service end user interfaces, service media transformations and multi-media cross services.

Cross service common user image association

Growing community of inventors

White Plains, NY, United States of America

Stephen Brady