Patent ID: 11930383
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H  G  B | IPC B  G  H

Claim 1:
2. A method, in a network node in a communications network, for determining which of a first category associated with a first wireless device behaviour and a second category associated with a second wireless device behaviour each of a plurality of wireless devices fall into, the method comprising:
determining based on binary classification of first information which of the wireless devices meet all of at least one primary criterion to produce a subset of the wireless devices that meet all of the at least one primary criterion, wherein the first information comprises one or more measurements of timing advance (TA) measurements, an amount of requested uplink resources, uplink signal strength measurements, handover statistics, line of sight detection in downlink;
transmitting a request for second information to the subset of the wireless devices that meet all of the at least one primary criterion, wherein the second information comprises one or more of measurements on dedicated uplink pilot transmissions, sounding references signal (SRS), Random Access Channel (RACH) transmissions and their respective measurements in neighboring base stations, periodic downlink measurement reports comprising measurements of reference signal received power from different cells, channel state information reference signal (CSI-RS), and related measurement reports;
receiving the second information from each of the subset of the wireless devices that meet all of the at least one primary criterion;
determining based on binary classification of the second information which of the subset of the wireless devices that meet all of the at least one primary criterion also meet all of at least one secondary criterion; and
classifying the subset of the wireless devices that meet both all of the at least one primary criterion and all of the at least one secondary criterion into the first category, wherein the classification is based on at least one of: the first information comprising an amount of uplink resources requested by the first wireless device and the second wireless device, line of sight (LOS) detection in downlink, or handover statistics of the first wireless device and the second wireless device, wherein the step of determining which of the wireless devices that meet all of the at least one primary criterion also meet all of at least one secondary criterion is also based on the first information, wherein the at least one primary criterion are such that wireless devices meeting all of the at least one primary criterion have a first false positive rate and a first true positive rate of being in the first category, wherein the at least one secondary criterion is such that wireless devices meeting all of the at least one secondary criterion have a second false positive rate and a second true positive rate for being in the first category, wherein the second false positive rate is lower than the first false positive rate and the second true positive rate is lower than or equal to the first true positive rate, and wherein the first category comprises a drone category and the second category comprises a non-drone category.