International Business Machines Corporation

Geosatis S.a.

Urs Hunkeler

Hong Linh Truong

Daniel Nikolaus Bauer

Luis Garcés-Erice

Clemens Lombriser

Vincent Praplan

Edmund James Colli-Vignarelli

José Carlos Fernandes Demétrio

Beat Eugen Weiss

Alexandru Caracas

Anita Durand

José Carlos Fernandes Demetrio

Marcin Poturalski

Edmund Colli-Vignarelli

José Demetrio Fernandes

An electronic monitoring bracelet, comprising a ring-shaped body configured so as to be mounted around a limb or an object, and an electronic monitoring system positioned in the body, the electronic monitoring system comprising an integrity detection system and an internal source of energy. The ring-shaped body is in the form of a rigid shell containing a chamber or several chamber sections in which are positioned components of the electronic monitoring system, the ring-shaped body entirely encircling the bracelet.

Electronic monitoring bracelet

Methods and systems for discovery of a set of nodes in a network. The method includes selecting a node amongst nodes in a group of nodes to be processed, implementing a discovery procedure for the selected node, including broadcasting a neighbor discovery request from a node currently selected on a shared transmission medium of the network, receiving at the node currently selected replies sent by neighbor nodes on the shared transmission medium and adding the neighbor nodes to the group of nodes to be processed and repeating the steps of selecting and instructing for other nodes in the group of nodes to be processed, until all nodes of the set are discovered. Implementing a link probing procedure after the discovery procedure, including sending one or more link probing messages for a measure of link quality and receiving replies comprising data related to the measure of link quality.

Discovery of a set of nodes in a network

Methods and systems for discovery of a set of nodes in a network. The method comprises selecting a node amongst nodes in a group of nodes to be processed; and instructing to implement a discovery procedure for the selected node. The procedure comprises broadcasting a neighbor discovery request from a node currently selected on a shared transmission medium of the network; and receiving at the node currently selected replies sent by neighbor nodes on the shared transmission medium and adding the neighbor nodes to the group of nodes to be processed; and repeating the steps of selecting and instructing for other nodes in the group of nodes to be processed, until all nodes of the set are discovered.

An electronic monitoring bracelet, comprising a ring-shaped body () configured so as to be mounted around a limb or an object, and an electronic monitoring system positioned in the body, the electronic monitoring system comprising an integrity detection system () and an internal source of energy (). The ring-shaped body () is in the form of a rigid shell containing a chamber or several chamber sections in which are positioned components of the electronic monitoring system, the ring-shaped body entirely encircling the bracelet.

Embodiments of the invention provide a method, system, and computer program product for selecting a server as a selected server for performing a specified function in a distributed computing system. In one embodiment, the method comprises identifying a group of servers in the system; and choosing as the selected server the server that has been in the system the longest. In one embodiment, each of the servers in the group has a respective contention period, during which the server sends a contention message, and the selected server is chosen using these contention messages. The servers in the group may have imperfect clock synchronization. In this case, the contention periods of the servers is kept greater than the maximum difference between the server clocks. The invention may be used to select a name server, or to select a server for another service.

Distributed server election with imperfect clock synchronization

Methods and systems for discovery of a set of nodes () in a network (). The method comprises

A method for synchronizing nodes of a multi-hop network with a Time Division Multiplex Access scheme (TDMA), the nodes being hierarchically arranged in different levels, including a step of organizing the TDMA by periodic superframes, the respective superframe having a number of frames including at least a broadcast frame, a step of providing the respective broadcast frame with a number of slots, the number of slots being equal to a number of parent nodes in the multi-hop network, a step of assigning each parent node one slot in the broadcast frame in dependence on its level, and a step of distributing a synchronization information to the parent nodes by means of the broadcast frame, respectively.

Synchronizing nodes of a multi-hop network

A data network includes a plurality of source nodes, at least one sink node, and at least one intermediate node, wherein routing of a reverse message from the sink node to a source node via at least one intermediate node is performed by the intermediate node using reverse path routing information data comprising a combination of source routing information data and transparent bridging information data, wherein the reverse path routing information data is constructed during propagation of a forward message from the source node to the sink node via the intermediate node.

Growing community of inventors

Echandens, Switzerland

Urs Hunkeler