|RUGGEDCOM INC. Patent applications|
|Patent application number||Title||Published|
|20110317548||METHOD OF AND DEVICE FOR RECOVERING FROM A ROOT BRIDGE FAILURE - An active loop-free topology established by a Rapid Spanning Tree Algorithm and Protocol (RSTP) emanates from an original root bridge. Upon a bridge directly connected to the root bridge suspecting a failure in the root bridge, the bridge directly connected to the root bridge generates a Root Failure Suspicion Notification (RFSN) Bridge Protocol Data Unit (BPDU) comprising a standard Rapid Spanning Tree (RSTP) BPDU portion and a compressed failed root identifier portion uniquely identifying the root bridge which is suspected of failing. The RFSN BPDU is propagated amongst the bridges in the network. The bridges which can identify a flag in the standard RSTP BPDU portion of the RFSN BPDU decompress the compressed failed root identifier and compare it to the stored root identifier at each bridge. If the received failed root identifier in the RFSN BPDU corresponds to the stored root identifier of the bridge, the bridge deletes the stored root identifier. The bridge then commences a time out during which, if further RFSN BPDUs are received, only the BPDU portion is acted on and the failed root identifier portion is ignored. The RSTP BPDU portion is acted on in the standard way pursuant to the RSTP protocol whether or not the bridge can also identify the flag or the compressed failed root identifier in the RFSN BPDU. Conversion to a new active topology is facilitated by deleting the original root bridge identifier which is suspected of failure from the memory of the bridges.||12-29-2011|
|20110185214||TIME FORMAT CONVERSION METHOD, DEVICE AND SYSTEM - A method and device for converting between different time domains at a local unit utilizing an processor is disclosed. Time counters to count time in at least two different formats are located locally at each unit. Once a time conversion is initiated, a time stamp is received by the processor and the time counter in the new time domain commences calculating an adjustment count. Once the converted time is received from the processor, the received time plus the adjustment count are summed to provide a time base for the new time domain. The time counters continue counting in their respective time domains after conversion.||07-28-2011|
|20100315972||DISCOVERY AND REDISCOVERY PROTOCOL METHOD AND SYSTEM - A management station discovers agent devices connected to a network by broadcasting discovery messages having a session number and waiting for discovery acknowledge unicast messages from at least some of the discovery aware agent devices connected to the network. The management station receives the discovery acknowledge unicast messages from the agent devices and each message comprises the session number and an address uniquely identifying the agent device sending the discovery acknowledge unicast message. The management station then sends a unicast registration message having a sequence number based on the session number of the discovery message. At that point, the agent device will be registered permitting further communication to the registered discovery aware agent device. The management station will send, periodically, rediscovery messages having the same session number as the discovery message. The discovery aware agent devices connected to the network which have not previously responded to a discovery or rediscovery message having the same session number or have not received a registration message with a sequence number related to the session number will respond to subsequent rediscovery messages. The agent devices will not respond to subsequent rediscovery messages if the agent device has previously received a unicast registration message with a sequence number related to the session number of the multicast discovery message or the subsequent multicast rediscovery message.||12-16-2010|
|20100290186||Open Frame Electronic Chassis For Enclosed Modules - An open frame chassis has a top opening and a bottom opening permitting ambient air flow there through. A plurality of modules, each enclosing electrical components which are in thermal contact with a heat sink area of their corresponding module, and each of which can be inserted to an inserted position in the open frame chassis. When the modules are inserted into the open frame chassis, ambient air may flow from the bottom opening of the chassis across the heat sink area of each module to the top opening in order to passively cool the modules and the electrical components enclosed therein. The heat sink area has fins which are separated by a distance of 9 mm to 12 mm and have a height 10 mm to 20 mm. Key pins are associated with the electrical connectors of the chassis to guide the modules into place and prevent incorrect insertion of a different type of electrical module not corresponding to the electrical connection of the chassis for that slot. Guide pins are present on the corners of the modules to mate with guide holes in the chassis to secure the module to the open frame chassis and decrease vibration. Both sides of the chassis have side openings through which the fins of the modules inserted into the end slots of the chassis may be exposed. The power modules are inserted into the end slots. The chassis has an inverted connection at one end slot to accommodate identical power modules at both end slots such that the heat sink area always faces a side opening in the open frame chassis.||11-18-2010|
|20100220701||Client/Bridge and Method and System for Using Same - The transmission of data is accomplished across a network having wireless and wired interfaces. Data is transferred through a wireless interface from an Access Point to a Client/Bridge and then to one of a Intelligent Electrical Device (IED) connected to the Client/Bridge through a wired connection. Data is transferred from the Access Point to the Client/Bridge through a 4 address mode wireless interface having originator, transmitter, receiver and destination address fields. The originator address uniquely identifies an IED in the overall network, the transmitter address identifies the AP transmitting the data, the receiver address identifies the Client/Bridge receiving the data through the wireless interface while the destination address refers to one of the IEDs connected to the Client/Bridge through the wired interface. Communication can also be performed in reverse from one of the IEDs connected to the Client/Bridge through the wired interface to an IED in the overall network. The Client/Bridge determines context cache information representing the media access control numbers of each of the IEDs connected to the Client/Bridge through the wired interface and transfers this context cache information to the AP. In the event of a failure of the Client/Bridge, the context cache information stored at the AP can be transferred to the Client/Bridge using the wireless interface to facilitate recovery of the Client/Bridge.||09-02-2010|
Patent applications by RUGGEDCOM INC.