Patent application number | Description | Published |
20100121957 | PERFORMANCE ENHANCING PROXY HANDOVER - An approach is provided for graceful shutdown and startup of spoofing when a handover procedure is performed. A handover of a performance enhancing proxy (PEP) session associated with a transport connection is detected. A shutdown procedure is initiated to stop spoofing of the transport connection in response to the detected handover. The shutdown procedure avoids teardown of the transport connection during the handover from a first link to a second link of a communication system. | 05-13-2010 |
20130246884 | METHOD AND APPARATUS FOR WIRELESS DATA TRANSMISSION SUBJECT TO PERIODIC SIGNAL BLOCKAGES - A system and method for data transmissions in a wireless communications system, which accommodates for a periodic blockage of the transmission signal, is provided. A data stream is segmented into packets of a predetermined fixed-size for a burst-mode transmission over a channel of the communications system, wherein the transmission is subject to a periodic blockage. A forward error correction outer code is then applied to the packets of the data stream for recovery of packets subjected to the periodic blockage, and a unique word is added to each packet for acquisition of frequency, carrier phase and symbol timing of the respective packet. The packets of the data stream are interleaved based on an interleaver of a depth based at least in part on a ratio of a blockage free duration between two consecutive blockages of the periodic blockage to a duration of each blockage of the periodic blockage. | 09-19-2013 |
20130315136 | FRAME TIMING SYNCRHONIZATION IN A GEOSTATIONARY SATELLITE SYSTEM - Aspects of the invention provide a system and method to allow inroute frame timing synchronization without the aid of hub signal loopback or satellite ephemeris data. Furthermore, it allows tracking and compensating of the satellite motion to allow multiple remotes to use TDMA on the inroute frequencies, while minimizing the aperture. Two main techniques proposed are CLT and polling based approaches, which are used in combination for an optimum solution. In CLT based approach, hub transmits remote specific timing correction feedback messages on the outroute on as needed basis. In polling based approach, the remotes derive their timing based on a per-beam average delay estimate broadcast by the hub and a measured local delay specific to each outroute stream from a remote. An aspect of the invention uses triangulation method to determine satellite position. Furthermore, an aspect of the invention uses hub burst arrival method instead of polling approach. | 11-28-2013 |
20130315137 | FRAME TIMING SYNCHRONIZATION IN A GEOSTATIONARY SATELLITE SYSTEM - Aspects of the invention provide a system and method to allow inroute frame timing synchronization without the aid of hub signal loopback or satellite ephemeris data. Furthermore, it allows tracking and compensating of the satellite motion to allow multiple remotes to use TDMA on the inroute frequencies, while minimizing the aperture. Two main techniques proposed are CLT and polling based approaches, which are used in combination for an optimum solution. In CLT based approach, hub transmits remote specific timing correction feedback messages on the outroute on as needed basis. In polling based approach, the remotes derive their timing based on a per-beam average delay estimate broadcast by the hub and a measured local delay specific to each outroute stream from a remote. An aspect of the invention uses triangulation method to determine satellite position. Furthermore, an aspect of the invention uses hub burst arrival method instead of polling approach. | 11-28-2013 |
20140254474 | FRAME TIMING SYNCHRONIZATION IN A GEOSTATIONARY SATELLITE SYSTEM - Aspects of the invention provide a system and method to allow inroute frame timing synchronization without the aid of hub signal loopback or satellite ephemeris data. Furthermore, it allows tracking and compensating of the satellite motion to allow multiple remotes to use TDMA on the inroute frequencies, while minimizing the aperture. Two main techniques proposed are CLT and polling based approaches, which are used in combination for an optimum solution. In CLT based approach, hub transmits remote specific timing correction feedback messages on the outroute on as needed basis. In polling based approach, the remotes derive their timing based on a per-beam average delay estimate broadcast by the hub and a measured local delay specific to each outroute stream from a remote. An aspect of the invention uses triangulation method to determine satellite position. Furthermore, an aspect of the invention uses hub burst arrival method instead of polling approach. | 09-11-2014 |
20140269372 | SYSTEM AND METHOD FOR JITTER MITIGATION IN TIME DIVISION MULTIPLE ACCESS (TDMA) COMMUNICATIONS SYSTEMS - A TDMA jitter buffer includes a receiver, a processor and a comparator. The receiver can receive a data transmission signal via a channel of a communications system, and can receive one or more delay factors measured at a transmission end of the channel, wherein each delay factor is associated with a respective data packet. The processor can queue each of the data packets that is associated with a delay factor in a respective one of one or more jitter buffers. The comparator can perform a comparison, for each data packet that is associated with a delay factor, between the respective delay factor and a predetermined latency parameter. The processor can further release each data packet that is queued in one of the jitter buffers based on the comparison between the respective delay factor associated with the data packet and the predetermined latency parameter. | 09-18-2014 |
20140355594 | VIRTUAL DATA FRAMING FOR DATA PACKET TRANSMISSION OVER CHANNELS OF A COMMUNICATIONS NETWORK - An approach for transmission of data packets, based on virtual frame timing, over a communications channel is provided. A remote terminal receives a first stream of data packets at periodic time intervals. The terminal receives an allocation of time slots within a sequence of TDMA transmission frames, for transmission of the data packets over the channel. The timing structure of the allocated time slots is based on a virtual frame size relative to the interval timing of the first data packet stream, and independent of the frame size/timing of the TDMA transmission frames. The remote terminal may receive a second stream of data packets at periodic time intervals that differ from the time intervals of the first stream. In a multi-stream scenario, the virtual frame size for the time slot allocation is based on the greatest common denominator of the interval timings of the first and second data streams. | 12-04-2014 |
20150124616 | METHOD AND SYSTEM FOR SATELLITE BACKHAUL OFFLOAD FOR TERRESTRIAL MOBILE COMMUNICATIONS SYSTEMS - An approach for cost effective backhaul services in terrestrial mobile communications systems is provided. Data traffic over a terrestrial communications path between a cell site and a core network of a cellular communications network is monitored. The presence of a threshold level of congestion over the terrestrial communications path is determined. Appropriate portions of the data traffic for transfer to a satellite communications link between the cell site and the core network of the cellular communications network are determined. The determined portions of the data traffic are transferred from the terrestrial communications path to the satellite communications link. Once the threshold level of congestion over the terrestrial communications path has subsided, the determined portions of the data traffic are transferred from the satellite communications link back to the terrestrial communications path. | 05-07-2015 |