Abstract: A wireless local area network for data communications between a computer and mobile units is provided with at least two cell controllers connected to the computer and one or more rf ports each connected to a primary interface of one cell controller and to a backup interface of another cell controller. A control program in the cell controller monitors data communications between the other cell controller and the rf port by a backup interface. The program is arranged to cause the second cell controller to assume primary communications functions for the rf port in the event primary communications functions between a first cell controller and the rf port are inoperative.

Abstract: A method and system for over-the-air testing of a radio transreceiver is described. The radio transreceiver is placed in an enclosure box that is shielded to prevent leakage of RF energy. A nest assembly holds in place the radio transreceiver during testing to provide repeatable results with different radios. The testing assembly allows high volume characterization of the radio transreceiver performance in an environment rich with interfering RF signals.

Abstract: Described is a system and method for power conservation in a wireless device. The method includes switching, by a wireless computing unit, from a first communication mode to a second communication mode at a predefined time interval. The unit receives wireless signals only when in the second communication mode, and the first communication mode is a power-save mode. The unit then receives a wireless signal, and initiates a wireless connection to a wireless arrangement to obtain traffic data from the wireless arrangement when the signal includes a traffic data indicator which is indicative of existence of the traffic data. The unit switches into the first communication mode when the indicator is absent from the signal.

Abstract: Described is a system and method for configuring a computing device. The method comprises detecting a coupling of a computing device to a host device, receiving first configuration data from the computing device, displaying the first configuration data on a graphical user interface on a display of the host device, generating second configuration data as a function of at least one change to the first configuration data entered via the graphical user interface and inputting the second configuration data to the computing device so that the computing device replaces the first configuration data with the second configuration data.

Abstract: Described is a portable electronic device which may include a body accommodating electrical components of the device. The body defines a battery chamber and a battery receiving element movably mounted within the battery chamber. The battery receiving element includes a first set of contacts configured for a first battery type and a second contact configured for a second battery type and is movable between a first position in which the first set of contacts is exposed in the battery chamber and a second position in which the second contact is exposed in the battery chamber.

Abstract: A wireless coverage map of a wireless network is generated as a function of a location of at least one access point and a first signal data collected at a plurality of locations within the network. The first signal data includes a first signal strength of a wireless signal communicated between the at least one access point and a wireless device. A second signal data is received. The second signal data includes a second signal strength of a further wireless signal communicated between one of the at least one access point and a further wireless device. The existence of the predetermined wireless network coverage condition is determined as a function of the second signal data and the wireless coverage map.

Abstract: Methods, systems, and apparatuses for radio frequency identification (RFID) reader antennas are described. In as aspect, a reader antenna includes a reflecting element and a radiating element. The reflecting element has a body that defines a cavity. The radiating element is positioned in the cavity. The radiating element transmits a RF signal for the reader antenna. The reflecting element reflects the RF signal to alter a characteristic of the RF signal transmitted by the reader antenna.

Abstract: A system is provided for communication and sensory monitoring. The system comprises a plurality of nodes installed as a network in a structure. Each of the plurality of nodes comprises an internode transceiver for wireless communication between nodes, a wireless network transceiver for wireless communication with one or more wireless devices, one or more sensors for monitoring the environment of the structure and a processor coupled to the internode transceiver, the wireless network transceiver and the one or more sensors to exchange data with the internode transceiver, the wireless network transceiver and the one or more sensors devices coupled to the processor and process the data. The system also includes a wide area network bridge coupled to the plurality of network nodes. The network bridge receives data from the plurality of network nodes and passes the information to a computer network for processing.

Abstract: A lightweight, compact image projection module, especially for mounting in a housing having a light-transmissive window, is operative for causing selected pixels in a raster pattern to be illuminated to produce an image of high resolution of VGA quality in color. The brightness of the illuminated pixels is enhanced by combining constituent laser beams of the same wavelength. The contrast of the illuminated pixels is improved by sweeping a composite beam across a polarized screen, and by making the polarizations of all the constituent laser beams of the composite beam the same.

Abstract: An electrical cable bulk which can be coiled includes a jacket; a first wire assembly and a second wire assembly. The first wire assembly includes a shield conductor member at least partially shielding a first wire set. The first wire set includes a pair of insulated conductors disposed contiguously within the shield conductor member; and a ground conductor disposed within the shield conductor member. The second wire assembly includes a first shield conductor member at least partially shielding a second wire set. The second wire set includes a first pair of insulated conductors disposed contiguously within the first shield conductor member and a second pair of insulated conductors disposed contiguously within the first shield conductor member. The second wire assembly includes a second shield conductor member around a drain conductor and the first shield conductor member. The first and second wire assemblies are disposed within the jacket.

Abstract: Systems and methods for securely provisioning and managing security data based on location are provided. In an installation having one or more secure locations, a physically secure container having a security data tag is provided in a secure location. Security data required to establish a secure application (e.g., secure communications with a network element or with one or more peripheral devices in the secure location), such as a digital certificate and/or cryptographic keys, is written into the security data tag. Each secure location within an installation may have different security needs and therefore the security data tags in different locations may store different sets of security data. When a reader or device requiring access to an application enters a secure location, the security data is read from the tag and used to establish a secure application.

Abstract: An imaging lens assembly (30) for a camera assembly (20) of an imaging-based bar code reader (10) for focusing an image (100?) of a target object (100) within a field of view (FV) of the camera assembly (20) onto a sensor array (28) of the camera assembly (20). The imaging lens assembly includes a front aperture stop (31) facing the field of view (FV), the aperture stop (31) including an aperture (31a) through which light from the field of view (FV) passes. The imaging lens assembly (30) further including a three lens system (36) disposed rearward of the front aperture stop (31) and a meniscus lens (35) disposed rearward of the three lens system (36). The three lens system (36) and the meniscus lens (35) receiving light passing through the aperture (31a) and focusing the light onto the sensor array (28).

Abstract: An apparatus and method is provided for focusing an image of a target object. The apparatus comprises imaging circuitry for analyzing an image reflected from a target object that is projected onto an imaging sensor coupled to the imaging circuitry. A fixed imaging lens having an optical axis in alignment with the imaging sensor focuses the reflected image onto the imaging sensor. One of a plurality of apertures located within a selectable aperture of varying sizes is selected for optically enhancing the fixed imaging lens. An actuator is coupled to the selectable aperture for selectively selecting the one of the plurality of apertures in a direction transverse to optical axis for optically enhancing the fixed imaging lens.

Abstract: A multiplexing circuit uses parallel-configured pairs of resistors and signal sources in a voltage divider network in such a way that a single analog-to-digital input can be used to specify the state of more than one signal source. One circuit includes a microprocessor having an analog-to-digital (ADC) input; a memory communicatively coupled to the microprocessor; and a voltage divider network having an output coupled to the ADC input, wherein the network includes a plurality of resistors paired with a plurality of respective signal sources, and wherein the output is unique for each combination of states of the signal sources in accordance with a known relation that is stored in the memory. The signal sources are selected from two categories of sources: continuous sources and discrete sources, where discrete sources may be binary discrete or random discrete. In one embodiment, the first signal source is either a continuous source or a random discrete source, and the second signal is a binary discrete source.

Abstract: Interleaving multiple logical data streams into one physical data stream reduces overhead required to process the multiple logical data streams. Multiple arrays of data values are interleaved into a combined array of data that simulates a frame of data for input to a data port such as a video port. Revised timing and synchronization signals are provided to permit transmission of the combined array according to video data port protocol. The processor includes instructions for locating the various arrays of data values within the combined array.

Abstract: A MEMS-based reader has an extended range of working distances for reading bar code symbols. A digitizer resolves the edges of bar code symbols when located at far-away distances from the reader within the working range. The digitizer includes a differentiator for differentiating the analog signal to generate a first derivative signal, a peak detector for detecting voltage peaks in the first derivative signal, and a comparator for comparing voltage drops after the voltage peaks with a predetermined voltage value, and for determining the presence of each edge when each voltage drop at least equals, and preferably exceeds, the predetermined voltage value.

Abstract: A bar code scanning device, system and method that utilizes one or more vertical cavity surface emitting laser diodes for producing at least one laser beam, where the vertical cavity surface emitting laser diodes are disposed on a substrate, and wherein the produced laser beam is substantially an essential single spatial mode laser beam. The bar code scanning device, system and method of present invention also comprise a photodiode attached to the substrate and arranged to receive at least a portion of the beam of light reflected off the scanned bar code or symbol.

Abstract: A scanner with a two dimensional array of sensors generates an aiming pattern that is concurrently used as illumination for a segment of the array. In this manner, one-dimensional and simple two-dimensional barcodes can be quickly processed by loading and decoding only the segment of the array.

Abstract: A radio frequency exchange utilization calculation method in wireless medium that comprises identifying a plurality of packet counters pertaining to each of a plurality of transmission speeds and to each of a plurality of components of the wireless medium, identifying a plurality of octet counters pertaining to each of a plurality of transmission speeds and to each of a plurality of components of the wireless medium, incrementing each packet counter by one in accordance to the speed a data packet is transmitted, incrementing each plurality of octet counters by a number of octets in the data packet, calculating a packet weighted effective bit rate, calculating an octet weighted effective bit rate, calculating a total data exchanged, and calculating a percentage for the radio frequency exchange performance.

Abstract: A method and apparatus are provided to controllably reduce power of a laser projection display (LPD). Light is scanned from a laser onto a viewing surface to produce an image thereon, and power used by the laser is reduced used while scanning at least a portion of the viewing surface.