Abstract:
In order to detect an unmanned aerial vehicle (UAV) in a monitoring area using a rotatable camera, an integrated sensor configures a first detection area in the monitoring area by rotating the camera after fixing the focal length of the camera to an initial value, and configures a second detection area in the monitoring area by rotating the camera after changing at least one of the focal length of the camera and a rotation path representing a distance from the origin of the monitoring area.
Abstract:
Disclosed are methods and apparatuses for relaying messages in LPWAN. An operation method of a terminal may comprise transmitting a first join request message to a base station without IQ inversion; when a number of failed transmissions of the first join request message is greater than or equal to a preconfigured threshold, transmitting an IQ-inverted second join request message to a relay; and receiving a join response message from the relay that is a response to the second join request message. Accordingly, the performance of the communication system can be improved.
Abstract:
An operation method of a device in a communication system includes receiving from a reference node a beacon including configuration information of a downlink/uplink (DL/UL) slot in a super frame #n; confirming a position of the DL/UL slot configured in the super frame #n based on the configuration information; and performing at least one of a DL reception operation and a UL transmission operation in the DL/UL slot. Also, UL communication and DL communication are allowed in the DL/UL slot, and n is an integer equal to or greater than 0.
Abstract:
A channel allocation system for accommodating a plurality of nodes in a sensor network includes a PAN coordinator generating channel allocation information and CSMA idle information and transmitting a beacon including the channel allocation information and the CSMA idle information; and at least one node receiving the beacon, determining whether the contention period is in idle state based on the extracted channel allocation information and the CSMA idle information, determine a transmission time, an operation state in a reception interval, how to process received data by determining whether a channel is allocated based on whether the contention period is in idle state, and operating according to the determination result.
Abstract:
An a logistics information processing server includes a data processor configured to receive environment sensing data collected from at least one environmental sensor disposed in a cargo storage device in which at least one cargo is stored and cargo related information collected from a cargo tag attached to the at least one cargo, and to perform processing by classifying the environment sensing data and the cargo related data into cargo storage environment data, cargo information, and transportation environment information according to data attributes; and a logistics trust index generator configured to generate a logistics trust index indicating a degree of influence exerted on the quality of the cargo from the cargo storage environment data, cargo information, and transportation environment information output by the data processor.
Abstract:
An electronic device for performing behavior recognition and an operation method thereof are provided. The method of operating the electronic device includes generating sampling frames for each video clip by performing sampling on a plurality of video clips at a first sampling interval, generating a cumulative feature map for each video clip based on the generated sampling frames for each video clip, and using the cumulative feature map for each video clip as an input, learning a behavior recognition model for determining a behavior of an object included in a target video clip, wherein the plurality of video clips may include the object performing a same behavior, and wherein behavior time, which represents time consumed from a start to an end of the same behavior performed by the object, may be different for each video clip.
Abstract:
A method and device for detecting an illegal unmanned aerial vehicle (UAV) using a radio wave wall are provided. The method includes generating a radio wave wall between a plurality of reconnaissance UAVs that include a first reconnaissance UAV and second reconnaissance UAVs, using one or more wireless signals transmitted and received between the plurality of reconnaissance UAVs, and determining whether an illegal UAV enters the radio wave wall based on radio signal strengths of wireless signals received from the second reconnaissance UAVs.
Abstract:
Provided is a method and apparatus for detecting an unmanned aerial vehicle (UAV). The method of detecting a UAV includes receiving images from one or more cameras positioned in a UAV protected area; analyzing the received image to extract a UAV from the received image; and providing data related to the extracted UAV to train a UAV detection model, wherein photographing times or photographing positions of the one or more cameras are variably controlled.
Abstract:
A control method for collision avoidance in low power wireless sensor communication including a center node and a plurality of neighbor nodes includes assigning a seed to a neighbor node associated with a center node, updating, by the neighbor node, the seed at each radio frame, determining, by the neighbor node, a criterion for performing communication, and transmitting data in a next slot according to a result of carrier sensing is provided.
Abstract:
Provided is an apparatus for distributed processing of train monitoring traffic based on a hierarchical wireless sensor network, the apparatus including: a wireless sensor node configured to generate sensor data by measuring states of a train; a wireless mesh network (WSN) manager configured to classify the sensor data into priority data and non-priority data according to change characteristics, and to transmit the priority data to a sensor monitoring center through a wireless communication network and the non-priority data to wireless mesh nodes through a wireless mesh network; and one or more wireless mesh nodes configured to be spaced apart at predetermined intervals on a railway side, and to transmit the non-priority data, received from the WSN manager, to the sensor monitoring center.