Abstract: A method of detecting downlink interference in a communications system may include selecting a set of user equipment for measuring interference and generating a downlink interference neighbor list for some or all of the user equipment in the set. Empty resource blocks that are common to base stations on each downlink interference neighbor list are identified, and signals that are received by the set of user equipment during the empty resource blocks are analyzed to detect interference. Certain aspects of the method may be practiced before or after an interference detection period. A system for detecting downlink interference is also provided.

Abstract: A method for a proxy base station includes analyzing current network parameters, determining parameters for the proxy base station based on the analyzed network parameters, and transmitting the determined parameters for the proxy base station to an actual base station of the network.

Abstract: A method for coexistence with a pulsed interference source in a communications network includes receiving a communications signal, determining a first portion of the communications signal that is affected by the pulsed interference source, blanking the first portion of the communications signal, and processing the communications signal.

Abstract: A method for coexistence with a pulsed interference source in a communications network includes identifying transmission time intervals (TTIs) that are affected by pulses from the pulsed interference source and changing a transmission parameter for the TTIs that are affected by pulses.

Abstract: A method for scheduling wireless transmissions in a wireless communications network in the presence of pulsed interference includes receiving pulsed interference information, determining transmission opportunities based on the pulsed interference information, and when a transmission time interval (TTI) is less than a time of an opportunity of the transmission opportunities, transmitting a wireless signal during the opportunity.

Abstract: Transmitter localization and signal mapping may be accomplished by receiving measurement data from a plurality of nodes, the measurement data including a signal strength value and a geographic location for the signal strength value, triangulating the plurality of measurements using triangulation, and establishing at least one contour representing a level of signal strength. A system may receive measurement data from a plurality of user equipment, and use that data to localize an interference source and create a contour map.

Abstract: Identifying interference in a cellular network may include creating an interference neighbor list for a target base station that includes a plurality of neighboring base stations, determining a plurality of quiet resource blocks common to the plurality of neighboring base stations and the target base station, and analyzing signals received at the target base station during the plurality of quiet resource blocks. Whether to modify uplink transmission schedules, and the extent of modification, may be determined based on traffic levels.

Abstract: A method for coexistence with a pulsed interference source in a communications network includes receiving a communications signal, determining a first portion of the communications signal that is affected by the pulsed interference source, blanking the first portion of the communications signal, and processing the communications signal.

Abstract: A cooperative interference subtraction scheme includes receiving a first baseband signal including an interference signal at a first base station, receiving a second baseband signal including the interference signal at a second base station, calculating a channel translation parameter based on the first baseband signal and the second baseband signal, receiving a signal including a user equipment (UE) transmission at the first base station during a first time slot, and subtracting interference from the signal including the UE transmission using the channel translation parameter.

Abstract: A method for performing Carrier Aggregation (CA) using spectrum shared between an incumbent user and a telecommunications network includes establishing a primary cell (PCell) for the secondary user in a portion of radio spectrum that is exclusively licensed to the telecommunications network, establishing a secondary cell (SCell) for the telecommunications network in a portion of the shared spectrum that is shared with the incumbent user, receiving schedule data for the incumbent user at a controller in communication with the incumbent user and a transmitter for the PCell and the SCell, scheduling transmissions for the PCell and the SCell to avoid interference to the incumbent user, and transmitting the scheduled transmissions through the PCell and the SCell using Carrier Aggregation (CA). Accordingly, one or more SCell in shared spectrum may be aggregated with a PCell in dedicated spectrum.

Abstract: A method for spectrum coexistence includes determining interference from a primary network to a secondary network that is independent from the primary network, determining transmission parameters for a network element of the secondary network that mitigate interference from the secondary network to the primary network, and transmitting signals from the network element according to the determined transmission parameters. The network element could be a base station or user equipment. Accordingly, a secondary network can coexist with a primary network even when the networks do not communicate with each other.

Abstract: A method for scheduling wireless transmissions in a wireless communications network in the presence of pulsed interference includes receiving pulsed interference information, determining transmission opportunities based on the pulsed interference information, and when a transmission time interval (TTI) is less than a time of an opportunity of the transmission opportunities, transmitting a wireless signal during the opportunity.

Abstract: A method for coexistence with a pulsed interference source in a communications network includes identifying transmission time intervals (TTIs) that are affected by pulses from the pulsed interference source and changing a transmission parameter for the TTIs that are affected by pulses.

Abstract: A method for sharing spectrum between a primary user and a secondary user includes receiving a signal transmitted by the primary user at a first network equipment of the secondary user, determining a first attenuation coefficient for the first network equipment, estimating interference from the first network equipment at a receiver of the primary user, and adjusting parameters of the first network equipment.

Abstract: A cooperative interference subtraction scheme includes receiving a first baseband signal including an interference signal at a first base station, receiving a second baseband signal including the interference signal at a second base station, calculating a channel translation parameter based on the first baseband signal and the second baseband signal, receiving a signal including a user equipment (UE) transmission at the first base station during a first time slot, and subtracting interference from the signal including the UE transmission using the channel translation parameter.

Abstract: A method for a proxy base station includes analyzing current network parameters, determining parameters for the proxy base station based on the analyzed network parameters, and transmitting the determined parameters for the proxy base station to an actual base station of the network.

Abstract: Interference may be detected in a cellular network by receiving signals at a target base station in a quiet resource block in which no uplink transmissions to the target base station are scheduled to occur, identifying a plurality of user equipment attached to base stations neighboring a target base station as interfering user equipment, reconstructing signals transmitted by the interfering user equipment, removing the reconstructed signals from the signals received by the target base station in the quiet resource block, and determining interference in the signals from which the reconstructed signals are removed. Detected interference data can be used to create an interference cancelling receiver.

Abstract: A method of detecting downlink interference in a communications system may include selecting a set of user equipment for measuring interference and generating a downlink interference neighbor list for some or all of the user equipment in the set. Empty resource blocks that are common to base stations on each downlink interference neighbor list are identified, and signals that are received by the set of user equipment during the empty resource blocks are analyzed to detect interference. Certain aspects of the method may be practiced before or after an interference detection period. A system for detecting downlink interference is also provided.

Abstract: Identifying interference in a cellular network may include creating an interference neighbor list for a target base station that includes a plurality of neighboring base stations, determining a plurality of quiet resource blocks common to the plurality of neighboring base stations and the target base station, and analyzing signals received at the target base station during the plurality of quiet resource blocks. Whether to modify uplink transmission schedules, and the extent of modification, may be determined based on traffic levels.

Abstract: The present invention is directed to a process for transporting toluenediamine (TDA) from a first site to a second site. The process of the invention comprises the steps of (a) providing a molten mass of TDA isomers at the first site; (b) cooling the molten mass to a temperature below the melting point, the molten mass thereby forming flowable particles of solid TDA in an inert gas; (c) providing an airtight storage vessel lined with a chemically inert liner; (d) storing the flowable particles of solid TDA in the lined storage vessel; (e) charging the storage vessel with inert gas; (f) transporting the storage vessel from the first site to the second site; and (g) remelting the TDA flowable particles in inert gas with TDA liquid that is superheated above the melting point to produce a molten TDA isomer mixture in inert gas having substantially the same isomer ratio as that of the molten mass.