111results about How to "Minimize signaling" patented technology

A method and system for the reception, conversion and distribution of wireless communication signals received from such communication devices as PCS, Cellular, and Satellite over AC power lines commonly found within a building, office, home or other structure is disclosed. This invention specifically provides for the distribution of wireless signals in structures where otherwise signal degradation and / or blockage are common. Moreover, this invention takes advantage of the existing AC power lines to create a communication channel avoiding the necessity of rewiring the building or other structure. This invention provides important improvements to the signal coverage and reception of wireless transmitted signals within buildings and other structures and does so in an efficient and cost effective manner.

The present invention relates to a system and method of viewing pairs of perspective images of 3-D objects (i.e. stereoscopic image pairs) displayed from a CRT display surface in a time-multiplexed or field-sequential manner, and more particularly to a universal method of generating control signals for synchronously changing the optical state of liquid crystal (LC) shutter panels through which the time-multiplexed perspective. images can be sequentially viewed in a substantially flicker-free manner by the left and right eyes of a human viewer, independent of whether the images are displayed on NTSC, PAL, VGA or SVGA styled CRT display devices.

The present disclosure is directed to systems and methods for proactively enforcing a wireless free zone over an enterprise's airspace using Open Systems Interconnect (OSI) layer one, two, and three based techniques. The systems and methods prevent wireless communications over IEEE 802.11 (WiFi), IEEE 802.16 (WiMax), and IEEE 802.15.1 (Bluetooth) networks to enable an enterprise to enforce compliance to a no-wireless policy. Smart antennas and coverage planning are included to avoid disrupting a neighbor's wireless communications. Further, the disclosed systems and methods can be combined into existing Wireless Intrusion Prevention Systems (WIPS) or in a stand-alone sensor and server configuration to offer proactive no-wireless zones.

A method for requesting retransmission of high-speed packet data in a receiving Automatic Retransmission reQuest (ARQ) entity of a mobile communication system that simultaneously performs Hybrid Automatic Retransmission reQuest (HARQ) and ARQ. The method includes, upon receipt of a packet, determining a sequence number of the received packet, and determining if there is at least one missing packet preceding the received packet; if there is at least one missing packet, driving a first timer which is set to a time required when a number of retransmission attempts reaches a predetermined maximum number of HARQ retransmissions, and monitoring receipt of the missing packet; and upon expiration of the timer, sending to a transmitting ARQ entity an Acknowledgement (ACK) including a last sequence number among sequence numbers of normally received consecutive ARQ packets.

The present invention provides a handheld dermatological device for visualizing a skin treatment region prior to, during, or after therapeutic treatment with therapeutic energy. An apparatus according to the teachings of the invention can include an image capture device and a display device mounted to the apparatus and electrically coupled to the image capture device. The display device is capable of displaying images of the treatment area captured by the image capture device. The apparatus can further include a head capable of transmitting therapeutic energy to a treatment area, which can be precisely aligned by the user to a desired portion of the treatment area through the use of the display device. In some embodiments, the apparatus can include one or more illumination sources for illuminating a skin target region, and shield for shielding the image capture device from direct reflection of the illuminating radiation from a selected skin surface portion.

A transmission line equalizer, communication system, and method are provided for adaptively compensating for changes in transmission path length and transmission path medium. Within the equalizer is a filter that exhibits a high pass characteristic and, more specifically, has an inverse frequency response to that of the transmission path. The inverse filter can include a pair of amplifier stages coupled in parallel, with a mixer chosen to adaptively select portions of one stage over than of the other. The dual stage inverse filter can, therefore, adapt to greater transmission path lengths and / or attenuation. A feedback architecture is used to set the inverse filter response by measuring the amplitude of a communication signal output from the inverse filter during periods of low frequency. A peak detector will capture a peak-to-peak voltage value during those periods, and adjust the output of the slicer to match a launch amplitude of the communication signal. The peak detector within the feedback architecture helps ensure the predicted amplitude matches the launch amplitude to minimize over-compensation or under-compensation even though a different integrator might register no difference in integrated voltage or energy at the output of the inverse filter compared to the output of the slicer.

Disclosed herein are a method and apparatus for sending and receiving data in a wireless communication system. More specifically, a method for sending and receiving, by UE, data in an unlicensed band in a wireless communication system may include performing blind detection for detecting a predetermined specific signal transmitted by an eNB in a cell of an unlicensed band and determining a period in which the signal is detected through the blind detection to be a reserved resource period (RRP) which is a time period secured for the transmission and reception of data in the cell of the unlicensed band.

A method and an apparatus for transmitting error-tolerant data is disclosed employing the ARQ technique, wherein the retransmission of erroneous data is performed up to the point where the remaining amount of errors is acceptable (for instance because the erorrs will not be perceived by the recipient of the information, which can be a person or a higher level protocol with additional error correction capabilities). The number of data blocks (RLC) detected as erroneous is employed to define a reliability measure (RM) and a request for retransmission of the erroneous data blocks is performed until a desired reliability threshold (RT) is reached. An additional threshold with a higher value than the first one can be employed to request for optional retransmission when the reliability measure (RM) is between the first and the second threshold. The retransmission will be performed only if further conditions such as channel availability are met.

Multi-port hybrid-based cancellation networks may be used to enable simultaneous transmit and receive in one or more co-existent communication systems. A multi-port hybrid-based cancellation network may include a first and second quadrature hybrid, a first and second two-port network, and other circuitry components. The second quadrature hybrid may be distinct from the first quadrature hybrid. The first two-port network may include a first filter or a first amplifier connected between the first and the second quadrature hybrids. The second two-port network may include a second filter or a second amplifier that is distinct from but essentially the same as the first filter or the first amplifier connected between the first and the second quadrature hybrids. The other circuitry components may be connected between or connected to a connection between one of the quadrature hybrids and one of the two-port networks. These other circuitry components may have a configuration that minimizes signal return loss at least one of the ports of the multi-port hybrid-based cancellation network. They may in addition or instead have a configuration that maximizes signal isolation between at least two of the ports of the multi-port hybrid-based cancellation network.

An apparatus for detecting a potentially dangerous ferromagnetic object carried inadvertently by a person approaching the magnet of a magnetic resonance imaging system (14) uses the fringe field (16) of the magnet and provides guide members (11) defining a path along which the person is prescribed to pass. The path (11) is generally or approximately parallel to the field at the path. At least one sense coil and generally two sets of sense coils (12, 13) are located on respective sides of the path (11) so that the movement of the ferromagnetic object in the field of the magnet causes a voltage to be generated in the sense coil.

A wavelength-selectable laser with a resonance region formed by two reflecting surfaces include a gain medium generating a laser beam, a first filter, and a second filter. The first filter has a first controllable transmission region and transmits a first predetermined wavelength region of the laser beam generated in the gain medium, the first predetermined wavelength region matching the first controllable transmission region. The second filter has a plurality of periodically arranged second transmission regions and transmits a second predetermined wavelength region of the laser beam transmitted by the first filter, the second predetermined wavelength region matching one of the second transmission regions.

A multilayered wiring board has electrodes disposed on a first surface and a second surface, alternately layered insulation layers and wiring layers, and vias that are disposed in the insulation layer and electrically connect the wiring layers. The second electrode disposed on the second surface is embedded in the insulation layer exposed on said second surface, and the second wiring layer covered by the insulation layer exposed on said second surface does not have a layer for improving adhesion to the insulation layer.

A multi-port hybrid-based cancellation network may include a first and second hybrid coupler, and a first and second two-port network. The second hybrid coupler may be distinct from the first hybrid coupler. The first two-port network may include a first filter connected between the first and the second hybrid couplers. The second two-port network may include a second filter that is distinct from but essentially the same as the first filter connected between the first and the second hybrid couplers. Other circuitry components may be connected to one of the ports of multi-port hybrid-based cancellation network. These other circuitry components may have a configuration that increases or maximizes signal isolation between at least two of the ports of the multi-port hybrid-based cancellation network.

A method and apparatus includes a transmitting unit configured to transmit a packet to a dedicated destination internet protocol address, wherein the packet includes a request with an emergency service indication. The mobile station also includes a receiving unit configured to receive an incoming packet for an emergency service call, wherein the incoming packet is destined to a source address of the mobile station and wherein the source address of one a designated IP address or a current IP address of the mobile station. The receiving unit is configured to receive the incoming packet through a service flow and the mobile station is thereby configured to minimize signalling with a network before the mobile station begins an emergency service call.

A device is described for indicating the locking state of a fifth wheel coupling and an arrangement of a first and a second sensor. According to the prior art, the first sensor is arranged on the underside of the locking latch and monitors the position of the kingpin in relation to the locking latch. A second sensor that is used is an inductive proximity switch that monitors a safety mechanism against loosening. In practice, this type of positioning of the first sensor has led to damage of the locking latch and the first sensor, while the signals of the second sensor were often false signals. Thus, the object of the invention is to provide a device for indicating the locking state, which maximizes operational availability and minimizes false signals. A further object of the invention is to optimize the arrangement of the first and the second sensor. These objects are attained by arranging the first sensor detecting the kingpin in the area of the locating hole and configuring the second sensor as a magnetically sensitive sensor that interacts with a magnet mounted on the operating lever. The two sensors are based on different mechanisms of action.

A method for performing transmission or reception by a first communication node (511) in at least one of: a first set of time-frequency resources (1201) and a second set of time-frequency resources (1202) in a frame (1200). The first and the second set of time-frequency resources (1201, 1202) are reserved for communication of reference signal and / or control information in a pre-arranged direction of: transmission and reception to or from one or more second communication nodes (512). The first communication node determines (1301) that the direction of communication of at least one of the first and second set is to be switched for at least one frame (1200). The first communication node also performs (1306) transmission or reception of control information in at least one of the first and second set of time-frequency resources (1202) according to the determined switched direction to or from, one or more third communication nodes (513).

Architecture of a mobile communication system network and method for transmitting a packet data using the same, which can minimize required signal links and interlocking lines, the architecture including a plurality of radio network controllers each connected to a plurality of base stations in a cell or a sector to which the network controller pertains for separating a packet data service path from a circuit data service path when a particular mobile station is matched to this core network, at least one mobile switching center connected to the plurality of radio network controllers in a region of the mobile switching center by an ATM switching system for routing an originating call from the mobile station or a terminating call to the mobile station, a VLR / HLR(Visitor location register / home location register) connected to the mobile switching center for managing mobility of the mobile stations, and at least one PDGN(Packet data gateway node) for routing a packet data provided from either the mobile switching center or an external network according to a terminating call side identification number.

A device is described for indicating the locking state of a fifth wheel coupling and an arrangement of a first and a second sensor. According to the prior art, the first sensor is arranged on the underside of the locking latch and monitors the position of the kingpin in relation to the locking latch. A second sensor that is used is an inductive proximity switch that monitors a safety mechanism against loosening. In practice, this type of positioning of the first sensor has led to damage of the locking latch and the first sensor, while the signals of the second sensor were often false signals. Thus, the object of the invention is to provide a device for indicating the locking state, which maximizes operational availability and minimizes false signals. A further object of the invention is to optimize the arrangement of the first and the second sensor. These objects are attained by arranging the first sensor detecting the kingpin in the area of the locating hole and configuring the second sensor as a magnetically sensitive sensor that interacts with a magnet mounted on the operating lever. The two sensors are based on different mechanisms of action.

A plurality of image projection modules is operative for causing selected pixels in overlapping raster patterns to be illuminated to produce a large size image of high resolution of VGA quality in monochrome or color. The selected pixels in an overlap region of the patterns are illuminated at a lesser intensity to provide uniform brightness over the image. Multiple single mode lasers, or a multimode laser with an aperture stop, are employed to increase laser output power. Speckle noise is reduced by controlling the optical transmission characteristic of a projection screen. Three-dimensional images are generated by moving the screen. Cross-coupling between drive and feedback mechanisms in image projection is reduced for better image quality.

Non-volatile memory (NVM) cells are sensed using a forced neighbor signal to eliminate improper readings generated by a neighbor effect. A selected NVM cell is sensed using a near-ground signal by applying a potential to a first terminal, coupling a second terminal to ground, and then decoupling the second terminal and comparing the resulting cell signal with a reference signal as both signals are developing (i.e., increasing from ground). A forced neighbor signal is applied to one more neighboring cells such that as the sensed cell signal develops (increases from ground), the forced neighbor signal develops at a similar rate, thereby maintaining a voltage across the neighboring cells close to zero and thus preventing leakage of the sensed cell signal through the neighbor cell(s). A dc sensing approach utilizes a current source and grounded resistor to minimize leakage through the neighbor cell(s).

This invention generally relates to an optical filter for a fiber optic communication system. An optical filter may be used, following a directly modulated laser source, and converts a partially frequency modulated signal into a substantially amplitude modulated signal. The optical filter may compensate for the dispersion in the fiber optic transmission medium and may also lock the wavelength of the laser source.

A combined transmission unit for TMDS signals and LVDS signals. A first (LVDS) transmission unit includes a set of first input terminals to receive first data, and a second (TMDS) transmission unit includes a set of second input terminals to receive second data. A phase locked loop (PLL) generates a first set of output clock signals to the first transmission unit in a first mode and a second set of output clock signals to the second transmission unit in a second mode according to a mode selection signal. The first and second transmission units are able to transmit the first data to the first and second external input units in the first and second modes respectively, according to the mode selection signal and the first and second sets of output clock signals.

A high impedance fault isolation system (HIFIS) identifies, isolates and dissipates high impedance, low current faults which occur within an individual tap, or branch, of an electric power distribution system using only portions of the tap affected. A master meter, or father smart meter (FSM), on the affected tap sends a coded signal to an antenna receiver combined with a microprocessor and chip which operates an electromagnetic control (EMC) grounding spring switch which isolates the downed primary conductor by causing the distribution system protecting device, i.e., a high voltage fuse or recloser, to de-energize the downed primary wire. This localized application of the HIFIS at the individual tap level allows the FSM to analyze and determine, for example, that the specific field condition is a “downstream wire down”, and that the installed isolating device has failed to operate because of insufficient fault current, allowing the localized intervention of the HIFIS to achieve the de-energization more efficiently and safely, and within a much shorter time period. A fire door sensor circuit then receives the trip signal from the microprocessor, causing the fire door sensor to melt open and release a shorting spring, in initiating operation of an expulsion fuse or recloser, which kills the downed live wire.

This invention generally relates to an optical filter for a fiber optic communication system. An optical filter may be used, following a directly modulated laser source, and converts a partially frequency modulated signal into a substantially amplitude modulated signal. The optical filter may compensate for the dispersion in the fiber optic transmission medium and may also lock the wavelength of the laser source.

Featured are methods for magnetic resonance imaging in which MR signals of selected tissues, fluid or body components in a target area are desired to be essentially eliminated, which method includes applying an initial RF inversion pulse to invert the magnetization of the selected tissues or to apply any other T1 preparation aimed at nulling one or more tissue species and successively applying one or more RF inversions pulses thereafter. More particularly, the successively applied RF inversion pulses are applied so as to essentially maintain the magnetization of the selected tissues at or about the zero-crossing point of the longitudinal magnetization. Such methods further include interleaving a plurality of excitation pulses for acquiring image data and the RF inversion pulses so that at least one of the plurality of excitation pulses follows in a time sequence the application of one of the applied RF inversion pulses such that the image data is acquired following an inversion pulse.