Patent application number | Description | Published |
20100207573 | Thermoelectric feedback circuit - An article of manufacture, comprising: an LED or other light source in thermal communication with a thermoelectric module; and a feedback circuit that directs current generated by the thermoelectric module to at least one device. This invention improves on prior art by recycling heat produced by the LED or other light source into electricity produced via the thermoelectric module to be used by the light source, a cooling device, battery charger for battery backup system, control or monitoring system, etc. | 08-19-2010 |
20100213835 | LED Diffusion Techniques - An article of manufacture, comprising: at least one point source of light which emits a light beam; and at least one reflective means for diffusing the light and/or converting the light to a different color range. The goal of this invention is to greatly increase the energy efficiency of area lighting by the use of highly efficient beams light sources. | 08-26-2010 |
20100308731 | Light Engine - The present invention discloses an integrated electronic light source module that has a base plate to support an electronic light source; a power supply to drive this light source; and a heat sink to dissipate the heat generated by this invention. The cooling fins of the heat sink are in perpendicular relation to the axis along which the natural flow of heat is oriented. Such a setup provides for effective heat dissipation and a more rapid cooling then disclosed in the prior art. Although, the present invention can be completely autonomous, an optional coupling unit can be included that is adapted to connect to an external power source, such as a socket of a light fixture. The electronic light source embodies the use of an LED element, or of a more traditional fluorescent lighting. The present invention increases modularity of the device by integrating all components needed for an effective prolonged illumination into a single swapable module. | 12-09-2010 |
Patent application number | Description | Published |
20100124207 | Distributed medium access control (DMAC) for Mobile Ad Hoc networks - Message or traffic data is transmitted from a given radio or node for reception by one or more other nodes in a communications network, by arranging the node for transmitting the data according to a selected one of a number of different medium access protocols. The medium access protocol selected for a given message or traffic is determined according to one or more of (a) the size of the traffic, (b) the priority of the traffic, (c) the periodicity of the traffic, and (d) whether the traffic is broadcast or unicast to the other nodes in the network. Each radio includes one or more processor and memory modules configured to output messages or traffic for transmission from the radio according to the selected medium access protocol. By using distributed scheduling and traffic control to protect against hidden nodes, the radios can maintain agile portability in tactical urban environments. | 05-20-2010 |
20100238890 | TIME SYNCHRONIZATION FOR DISTRIBUTED MOBILE AD HOC NETWORKS - Time synchronization among nodes in a wireless mobile ad hoc network (MANET) is obtained using a cross layer approach. Each node maintains a routing table that contains entries corresponding to other nodes of the network that are one or more hops away from the node, and topology messages are exchanged periodically among the nodes in order to update their routing tables. A network master node is selected, and remaining nodes that are one or more hops away from the master node are defined as slave nodes. The master node includes master timing information the topology messages that it transmits. The timing information is concatenated to include a first time (T | 09-23-2010 |
20120250629 | MULTIUSER DETECTION ENABLED MEDIUM ACCESS CONTROL IN MOBILE AD HOC NETWORKS - A method of providing medium access control for a wireless mobile ad hoc network includes defining a TDMA network timing frame including a data (DATA) zone having one or more time slots structured to support multiuser detection (MUD) of concurrent transmissions during each slot, a negative acknowledgment (NACK) zone during which nodes transmit requests for retransmission of packets destined to but not successfully received by the nodes, a broadcast (BC) zone during which network management messages are broadcast to the nodes, and a control (CTRL) zone. A primary master (PM) node is selected and operates as a source of network time for all the nodes. Each node synchronizes its time to that of the PM node during the CTRL zone in a distributed manner, by exchanging control messages with the PM node or other nodes located one or more hops from the PM node. | 10-04-2012 |
20120250632 | DISTRIBUTED SCHEDULER DESIGN FOR MULTIUSER DETECTION ENABLED WIRELESS MOBILE AD-HOC NETWORKS - In the method for operating an interference multiple access communications system, wherein the improvement comprises the steps of employing a distributed scheduler within a Media Access Controller (MAC) for Multiuser Detection (MUD) enabled Mobile Ad-hoc Networks (MANETS) to increase spectral efficiency by increasing spectral use and providing a way to dynamically allocate virtual channels to achieve maximum channel reuse in different network topologies and different link patterns and to ameliorate any hidden or exposed node problems. | 10-04-2012 |
Patent application number | Description | Published |
20080212695 | Transmission Methods and Apparatus in Multi-Band Ofdm Wideband Systems - Methods and apparatus for use in a multi-band OFDM wideband transmission systems are disclosed. A frame of source data is mapped by a transmitter for transmission using a first mapping. The frame of source data is then mapped by the transmitter for retransmission using a second mapping to increase frequency diversity. A receiver may identify source data that experiences fading and communicate the tone/frequency on which the fading occurred to the transmitter so that the transmitter may map the source data that experienced fading during transmission to another tone/frequency for retransmission. | 09-04-2008 |
20080298329 | Method of Beacon Management For Merging Piconets - A method for synchronizing communications between first and second piconets is provided. It is determined whether superframes corresponding to the first and second piconets are synchronized according to respective beacon period start times from the detected beacons. When the superframes are not synchronized, a type of overlap is determined. The type of overlap includes 1) an overlap between beacon periods, 2) an overlap between reservation periods and 3) an overlap between beacon periods and reservation periods of the superframes. The first and second piconets are merged into a single piconet according to rules based on the determined type of overlap. | 12-04-2008 |
20090122987 | Enhanced transmission systems for use in wireless personal area networks - Method and computer program products for enhancing wireless communication in a wireless network are disclosed. In the wireless network, frames of data are transmitted in bursts. Wireless communication is enhanced by transmitting a first frame of source data that is scrambled using a scrambling sequence in a first burst, storing an indicator corresponding to the scrambling sequence for the first frame, identifying the scrambling sequence of the first frame for retransmission of the first frame, retransmitting the first frame (which is scrambled using the identified scrambling sequence) in a subsequent burst, receiving the transmitted and retransmitted first frames, and processing the received transmitted and retransmitted first frames to recover the source data. | 05-14-2009 |