Abstract: A method for locating a source of interference external to a wireless telecommunications network includes assigning first and second elevation values to each pixel in a grid of pixels that represents an area associated with a plurality of cellular antennas, and calculating at least one probability value that the source of interference external to the wireless telecommunications network is located at an associated pixel by calculating respective probability values for pixels in the grid using the first elevation value and the second elevation value of the associated pixel and vertical gain values for each of the plurality of cellular antennas.

Abstract: A method for locating a source of interference external to a wireless telecommunications network includes establishing a grid of pixels that represents an area associated with a plurality of cellular antennas, assigning an elevation value to each pixel in the grid, determining a vertical gain for each of the plurality of cellular antennas, and determining respective probability values for pixels in the grid using the elevation values and the vertical gain, each of the respective probability values representing a probability that the source of interference external to the wireless telecommunications network is located at an associated pixel.

Abstract: A method and system that separate thermal and background interference noise measurements from interference measurements can determine periodicity of an event using active percentage values. The active percentage value of an interference event may be determined based on unsupervised machine learning on a per-Recording Output Period (ROP) basis. The active percentage of the interference event may be used with other characteristics to help classify the interference source causing the interference. After measuring RF energy at a base station in the network at predetermined intervals over a plurality of consecutive first of time periods, for each time period, a method arranges binned values of the measured energy into at least one cluster, determines whether each cluster of the at least one cluster represents noise or interference, and characterizes the interference, and the method indicates a source of the interference.

Abstract: A field interference investigation tool (FIIT) cooperates with a spectrum analysis system to identify the location of a source of non-cellular interference to a cellular telecommunications network. The FIIT may be provided with one or more characteristic of the interference that is used to confirm that interference detected by the FIIT device is relevant to the telecommunications system.

Abstract: Time division duplexed (TDD) Cellular networks can experience interference in receive times from downlink transmissions by aggressor cells after network changes, or from tropospheric ducting. The interference from the aggressor cells can be efficiently mitigated by determining that the victim cell is being affected by such interference, identifying the aggressor cells, and selectively increasing the guard time between the aggressor cells and the victim cell.

Abstract: Interference caused by passive intermodulation (PIM) can be automatically detected at receivers in a wireless telecommunications network, and the accuracy of PIM detection can be increased by de-weighting or ignoring time slots in which non-PIM interference is detected at a target receiver.

Abstract: A method for localizing interference uses data available to wireless communication networks to determine probabilities of a source of external interference being located at a plurality of predetermined locations. In a heterogeneous network, data from sites using omnidirectional antennas can be combined with data from multi-sector sites to accurately locate a source of interference.

Abstract: Tropospheric ducting can cause interference to a wireless telecommunications network from a remote source that would not normally cause such interference to the network. Interference from tropospheric ducting can be determined by analyzing tropospheric ducting factors which, individually or in combination, indicate interference from tropospheric ducting. Future tropospheric ducting interference events can be predicted using forecast data and data from past events.

Abstract: A system and method that utilize data from co-sited cells that transmit and receive data on frequencies that are licensed to different operators facilitate sharing cellular configuration and performance data without revealing proprietary data to competing operators. Detection of external interference is enhanced by data from different operators.

Abstract: Interference is a common problem in wireless communication networks. This disclosure provides a method and system that detect and locate interference sources based on various data describing or captured from an operational network during normal mobile wireless service times.

Abstract: Anomalies at nodes of a wireless network can be detected by receiving performance measurement (PM) data for a plurality of nodes in the wireless telecommunications network, accessing sets of binned data of the PM data for each node of the plurality of nodes, comparing at least one characteristic of the binned data for each node to at least one of a threshold value and the binned data for another node of the plurality of nodes, and determining whether an anomaly is present at each of the plurality of nodes based on a result of the comparison.

Abstract: A method for determining the location of a source of interference applies data in the vertical dimension to determine the probability of the source being located at various locations, or pixels. The data in the vertical dimension may be used to determine three-dimensional antenna gain for antenna-pixel pairs, and to determine whether a line of sight exists between the antenna-pixel pairs. Probability values are determined for the pixels using one or both of the line of sight information and antenna gain values.

Abstract: This disclosure provides a method and system that isolate non-seasonal components of network measurements from the seasonal components and compare the non-seasonal components to determine cause and effect relationships between various network nodes, to determine whether an event at a first node is experienced at a second node, and/or to characterize and localize a source of interference.

Abstract: Remote detection of interference generated by Passive Inter-Modulation (PIM) may be performed by determining intermodulation product information for a plurality of transmitters, receiving downlink power information of the plurality of transmitters, determining, using the intermodulation product information and the downlink power information, a Weighted Downlink Power (WDP) signal for an intermodulation product, and determining, using the WDP signal and uplink interference information, a PIM Detection Assessment (PIMDA) score of the intermodulation product, the value of the PIMDA score corresponding to interference generated by PIM. The WDP signal includes a plurality of expected power values. The remote detection of the interference generated by PIM may be performed by a wireless telecommunications system comprising a receiver and a processor, wherein the uplink interference information is of the 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: A method for localizing interference uses data available to wireless communication networks to determine probabilities of a source of external interference being located at a plurality of predetermined locations.

Abstract: Interference caused by passive intermodulation (PIM) can be automatically detected at receivers in a wireless telecommunications network, and the accuracy of PIM detection can be increased by de-weighting or ignoring time slots in which non-PIM interference is detected at a target receiver.

Abstract: Interference is a common problem in wireless communication networks. This disclosure provides a method and system that detect and locate interference sources based on various data describing or captured from an operational network during normal mobile wireless service times.

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 handling a jamming signal in a wireless network includes obtaining network measurement data on a wireless network performance, the network measurement data collected by a wireless network element. A first performance information on the wireless network performance is derived based on the network measurement data obtained. The first performance information is examined with respect to a predefined value. An alert is issued to indicate a presence of a potential jamming signal based on a result of the examination of the first performance information.