112 results about "Satellite modem" patented technology

The invention provides a system for monitoring a container for transporting cargo. The system includes an onboard device attached to the container and a central computer system. The central computer system processes alerts transmitted by the onboard device. The onboard device includes a processor / sensor component and an antenna component. The processor / sensor component comprises a processor for controlling the device. The processor / sensor component also includes one or more sensor in communication with the processor for sensing container conditions. A satellite modem in the processor / sensor component transmits alerts relating to container conditions and other satellite communications. The antenna component includes a satellite antenna, which is connected to the satellite modem.

A method, apparatus and article of manufacture are provided for obtaining and displaying Internet content using a remote secondary display and a primary handheld computing device. The primary device includes a cellular or satellite modem to connect to the Internet and wireless data transport system to communicate with the secondary device. The primary device retrieves network data from the Internet and transmits it to the secondary device for display. The secondary device includes a graphical user interface which may be controlled from the primary device.

An automatic GPS tracking system is taught that consists of a GPS tracking unit secured to a person or an asset that includes a GPS receiver and a first battery operated a processor and first RF transceiver which emits an RF signal. A home base station receives the RF signal within a pre-selected proximity communication distance. A monitoring station which is in communication from a cellular modem or a satellite modem within the GPS tracking unit such that, if a person or asset having the tracking system secured thereon moves beyond the a pre-selected proximity communication distance from a home base unit, the first transceiver RF communication signals is lost, the processor automatically powers “on” the second battery to power up the GPS receiver and the cellular modem, and the GPS tracking unit may signal the monitoring station which displays the location of the person or asset.

The invention provides a system for monitoring a container for transporting cargo. The system includes an onboard device attached to the container and a central computer system. The central computer system processes alerts transmitted by the onboard device. The onboard device includes a processor / sensor component and an antenna component. The processor / sensor component comprises a processor for controlling the device. The processor / sensor component also includes one or more sensor in communication with the processor for sensing container conditions. A satellite modem in the processor / sensor component transmits alerts relating to container conditions and other satellite communications. The antenna component includes a satellite antenna, which is connected to the satellite modem.

An apparatus and method for receiving a multimedia broadcasting service in a mobile communication system including a satellite digital multimedia broadcasting (DMB) reception system and a terrestrial DMB reception system. In the apparatus, a satellite DMB modem block demodulates a satellite broadcast signal received from the satellite DMB system. A terrestrial DMB modem block, sharing at least one function block with the satellite DMB modem block, demodulates a terrestrial broadcast signal received from the terrestrial DMB system. A Motion Picture Experts Group (MPEG) decoder separately decodes MPEG transport streams (TSs) for the satellite broadcast signal and the terrestrial broadcast signal.

A satellite system for broadband communication utilizing load balancing of satellite modems between physical forward sub-channels. The bandwidth requirements of the various satellite modems allocated to a domain are analyzed. Satellite modems, which can be moved between various physical forward sub-channels, are moved among physical forward sub-channels of a plurality of domains to balance loading between domains and / or physical forward sub-channels within domains. Buffering and latency are monitored in the subscriber modem termination system (SMTS) to allow dividing physical forward channel delay either uniformly or according to tiers of quality of service.

Provided is a method and system for transmitting MPEG frames between a DOCSIS based satellite modem termination system (SMTS) and a corresponding satellite modem (SM) system. The method includes identifying at least one data stream requiring transmission between the SMTS and the SM, the data stream including one or more MPEG frames. Next, the MPEG frames are organized within SMTS data queues based upon predetermined parameters and then transmitted based upon their organization within the data queues.

In a DOCSIS based satellite gateway data is transmitted over a single downstream channel, at different throughput rates. Data destined for each subscriber / receiver is assigned a throughput rate depending upon the downstream signal quality of that subscriber / receiver. To accomplish this, the downstream DOCSIS MAC data is parsed to extract DOCSIS packets. The DOCSIS packets are then loaded into packet queues based on an identifier within such packets such as the MAC destination address or SID. Each of the queues represents a bandwidth efficiency or throughput rate that can be currently tolerated by specific subscribers based on the current signal quality being experienced at the subscriber location. A PHY-MAP describing the downstream data structure to be transmitted and inserted into the downstream data. Data is extracted from the packet queues in queue blocks as defined by the PHY-MAP. The queue blocks are modulated with transmission parameters appropriate for each queue block and transmitted to the DOCSIS based satellite modems. The satellite modems extract the PHY-MAP from the downstream data and use the information contained in it to demodulate and decode the queue for which they have sufficient downstream signal quality. Satellite modems measure and transmit downstream signal quality to the satellite gateway to be used to assigned traffic to the appropriate queues.

Network access providers implement interactive procedures and subscriber terminals employ embedded secure authentication structures and procedures to ensure that a satellite modem at the subscriber terminal accurately verifies the identity of a satellite modem terminal system at the location of the network access provider gateway facility during the satellite modem initialization process so that the satellite modem will only attempt to acquire satellite resource from the appropriate (authenticated and authorized) satellite modem termination system. In a virtual downstream channel environment, diverse downstream channel feeds are distinguished by authentication procedures. The present invention differs from standard theft of service prevention because theft of subscriber prevention is in a virtual channel environment, where subscriber terminals have access to a plurality of virtual channels by the nature of the signal.

A method and apparatus for downloading a hyper text transfer protocol (HTTP) web page over a wireless link that couples a modem to a gateway. A transmission control protocol (TCP) link is opened between the gateway and the modem. A HTTP uniform resource identifier (URI) is received at the modem from a web browser, where the HTTP URI corresponds to the HTTP web page of an origin server. The TCP link is configured well before the web browser provides the URI. The HTTP URI is sent to the gateway. An Internet protocol (IP) address is determined for a domain name indicated in the HTTP URI by the gateway. The HTTP web page is retrieved by the gateway using the Internet, without the modem requesting it. The HTTP web page is transmitted to the satellite modem. Objects referenced in the HTTP web page are accessed similarly to the HTTP web page, but objects can also be accessed in parallel. In some cases, bandwidth is scaled for the TCP link according to loading of the modem.

Offender presence warning system comprises of;a GPS tracking device having a tamper detection strap used for attaching the device to an offender limb, containing a GPS receiver to receive GPS coordination signals from orbiting satellites and a cellular or satellite modem to establish communication with a monitoring station, a processor and an RF transceiver designed to transmit at time interval uniquely coded RF signal. And a victim carry on RF transceiver device which is designed to receive offender tracking device transmitted signals when the offender is located within near proximity of a victim, the victim carry on device processor in response to received RF transmitted signals from offender GPS tracking device, the victim warning device processor generates an audio / visual and or vibrating warning alarm signal(s) to alert the victim the presence of an offender near by, and the victim warning device automatically transmits a uniquely coded RF signal to the offender tracking device, which upon receipt of the signal generates audio and or vibrating alarm signal to warn the offender being to close to the victim and allow offender to move away from the victim, If the offender becomes non responsive to received warning signal(s), at a pre-determine time the offender GPS tracking device transmits a violation signal to a monitoring station containing information to both the offender unit ID, and to the victim unit ID along with GPS location information of offender.

A satellite modem whose baseband modules can be implemented mostly in software running on a suitable processor such as a high speed digital signal processor (DSP). The modem includes a RF portion and a baseband portion. The digitized output of a matched filter is input to the baseband processing portion that consists of software executing on a DSP. The modem comprises an antenna coupled to an upconverter / downconverter. The upconverter / downconverter is coupled to a RF transceiver which functions to receive a transmit signal from a baseband transmitter module and generate a signal for input to the upconverter / downconverter. The RF transceiver also functions to receive a downconverted signal and output an IF signal for input to an IF module. The IF functions to generate I and Q outputs that are input to a digital baseband module. The baseband module can be implemented as software executing on a DSP. Also included in a technique of modulation wipe off wherein the effects of modulation are removed. A signal detection technique performs signal detection and frequency acquisition in the presence of multiple signals in accordance with a method described hereinbelow. A timing acquisition technique includes an unwrapping technique that functions to correct timing errors before averaging is performed. Linear changes to the time estimates are performed using LSR techniques.

In a data over satellite system, preallocation of upstream channel resources is provided by a scheduler at the gateway satellite modem termination system (SMTS) in response from the user terminal, wherein the user terminal detects web browser and / or bulk transfers involving large amounts of data transfer from users via the upstream channel. A type length value (TLV) field is included with data packets transmitted to the gateway SMTS, at which excess transfer capability is allocated to the user terminal in anticipation of load requirements.

Disclosed in one embodiment is the use of a terrestrial media access control (MAC) chip or circuit in a satellite modem. The satellite modem comprises a satellite receiver, a satellite transmitter, an adaptor, and a terrestrial MAC chip. The adapter translates between the satellite physical layer and the physical layer of the terrestrial MAC chip. Protocols, messaging and signaling is spoofed for the terrestrial MAC chip such that it can be integrated into a satellite system. The received satellite signal is filtered so select one or more sub-channels that are fed to the terrestrial MAC chip. The terrestrial MAC chip could use a variety of physical layers, for example, Data Over Cable Service Interface Specifications (DOCSIS) or World Interoperability for Microwave Access (WiMAX).

Described is a miniaturized satellite transceiver for communicating with a Global Positioning System (GPS) satellite and a communications satellite. The miniaturized satellite transceiver includes an integrated GPS receiver configured to receive communications from the GPS satellite, a satellite modem configured to transmit and receive communications from the communications satellite, and an operating system. The miniaturized satellite transceiver is installable in a hand-held device, a mobile satellite transceiver system, or an in-flight transceiver and locator system.

Satellite communications are carried out using the Data Over Cable Interface Specification (DOCSIS). Satellite modems are notified of upstream channel congestion by inserting a congestion notification message in a medium access protocol (MAP) message for the upstream channel. Specifically, the congestion notification message is inserted in an unused field of the MAP message, such as the explicit congestion notification (ECN) field. The MAP message can also carry other characteristics of the upstream channel, including priority threshold, multicast access burst availability, and available bandwidth.

A process and system for controlling the use of satellite transmission capacity in terrestrial networks for the substitution of out-of-order data lines. The circuit / process is characterized in that an independent, local control apparatus, which monitors a backup terminal with the software specially written for this application, cooperates in limited manner with the data transmission device of the user and, based on the analysis of a data control signal, detects the need for alternative routing. Via communication lines and modems, the control apparatus switches on the transmission carrier of the affected satellite modem which is connected to a satellite antenna. The satellite antennas are in communication with the satellite via the transmission carrier. All other, non-affected terminals in the network also receive the transmission carrier of the affected satellite modem. The transmission capacity of the asynchronous overhead of the satellite modem is used for the transmission of destination addresses. A hub is provided, which is connected via an interface card or a modem to the terrestrial network that, in turn, is connected via lines to routers. The line is assumed to be out of order. Customer devices or terminals are connected via lines to the routers. The system-specific software-controlled circuit permits independent, decentralized administration of the satellite transmission channels by many satellite terminals without participation of a controlling central station. Thus, even when the terrestrial transmission path is out of order, a free-running alternative routing via a different medium has been achieved.

A satellite system for broadband communication with a plurality of remote locations is described. The satellite system comprises service spot beams from a satellite. Forward channels may be transported on carriers of the service spot beams. A plurality of forward sub-channels may pass on the forward channels. They system further comprises a plurality of domains that are independently managed and a plurality of satellite modems with the service spot beams. The plurality of sub-channels may be divided among the plurality of domains. Each of the domains may correspond to a plurality of time slices. A scheduler may allocate forward channels among the plurality of domains. Each of the time slices corresponding to the plurality of domains may vary in size over time.

A satellite system for broadband communication with a plurality of remote locations is described. The system includes a satellite and a plurality of service spot beams from the satellite. A plurality of forward channels are transported on carriers in the service spot beams. A plurality of sub-channels pass on the plurality of forward channels. The system further includes a plurality of independently managed domains, wherein the plurality of sub-channels are divided among the plurality of domains. The system may further include a plurality of satellite modems addressed by a plurality of service identifiers. Each of the plurality of service identifiers may be exclusively addressable within one of the plurality of domains.

A satellite communication system includes a satellite earth station operably coupled to a data network, and a plurality of satellite modems, each satellite modem of the plurality of satellite modems communicating in an upstream and downstream data communication mode with the satellite earth station via at least one servicing satellite. The satellite earth station includes a host processor for receiving data packets from the data network and processing DOCSIS management packets, a DOCSIS MAC coupled to the host processor for encrypting the transmit packet data from the host memory, framing data in MAC headers and inserting MAC timestamps in the transmit packet data, a satellite modulator coupled to the DOCSIS MAC for modulating the encrypted transmit packet data to generate downstream output data for transmission to at least one of the plurality of satellite modems, a burst demodulator for demodulating upstream data received from at least one of the plurality of satellite modems, and a turbo decoder coupled to the burst demodulator and the DOCSIS MAC for turbo decoding the demodulated data from the burst demodulator and sending the decoded data to the DOCSIS MAC. The DOCSIS MAC sends DOCSIS management packets portion of the decoded data to the host processor and sends transmit packet data portion of the decoded data to the data network.

A remote phase identification system identifies the unknown phase attribute of any energized conductor within a three-phase power distribution network. A field probe at a remote location obtains an instantaneous phase measurement at a precise GPS second and communicates this phase, GPS second, and GPS coordinates to a field client. Either wireless Internet or satellite modem communications is used by the field client to retrieve the reference phase taken by a base station at the same GPS second. Field client tagging reference phase configuration files are automatically created for any circuit and applied to the base station reference phase. Configuration files can be named, saved, and loaded and are used by the field client to identify and display the unknown phase attribute. A field client can be any personal computer, smartphone, or personal digital assistant.

Described is a miniaturized satellite transceiver for communicating with a Global Positioning System (GPS) satellite and a communications satellite. The miniaturized satellite transceiver includes an integrated GPS receiver configured to receive communications from the GPS satellite, a satellite modem configured to transmit and receive communications from the communications satellite, and an operating system. The miniaturized satellite transceiver is installable in a hand-held device, a mobile satellite transceiver system, or an in-flight transceiver and locator system.