Abstract: An automatic wireless fine-grained ratio map construction and adaptation system may include a Gaussian process regression (GPR) model constructed with real wireless received signal strength (RSS) measurements collected in a free space to provide coarse RSS estimation in a constrained space, and a generative adversarial network (GAN) to provide fine-grained RSS estimation in the constrained space by using an output of GPR as an input for a generator of GAN, modeling the irregular RSS distributions in complex indoor environments. The system may generate realistic RSS data in the constrained space that has not been manually site-surveyed.

Abstract: A system can include multiple WiFi-enabled commercial off the shelf (COTS) Internet of Things (IoT) devices disposed within an environment and configured to be a transmitter (TX) or a received (RX) to send or receive data over a WiFi radio frequency communication link. A server can be configured to receive and parse the CSI data transmitted from the RX, store the CSI data with a corresponding human identity label collected for training, train a human identification classifier using a Convex Clustered Concurrent Shapelet Learning (C3SL) method, and estimate an identification of a user based on the CSI data and the C3SL method.

Abstract: An automatic wireless fine-grained ratio map construction and adaptation system may include a Gaussian process regression (GPR) model constructed with real wireless received signal strength (RSS) measurements collected in a free space to provide coarse RSS estimation in a constrained space, and a generative adversarial network (GAN) to provide fine-grained RSS estimation in the constrained space by using an output of GPR as an input for a generator of GAN, modeling the irregular RSS distributions in complex indoor environments. The system may generate realistic RSS data in the constrained space that has not been manually site-surveyed.

Abstract: An Internet of Things (IoT) device can include a switch module configured to control a power supply for at least one powered device, a WiFi module configured to perform wireless communication and occupancy activity sensing, and a processor configured to determine human activity recognition WiFi measurements from the WiFi module based on the occupancy activity sensing and generate corresponding commands for the switch module based on the determined human activity recognition WiFi measurements.

Abstract: A mobile device and user association system can include wireless routers to execute software for capturing data including received signal strength (RSS) values and media access controller (MAC) addresses for a number of mobile devices (MDs) from existing wireless fidelity (WiFi) traffic. The system can also include a server to receive the RSS values and MAC addresses of the MDs to estimate a location of each MD and generate historical location data of each MD, identify and filter out temporary MDs, classify each non-temporary MDs as either a static device (SD) or a mobile phone (MP), and associate a user with each SD and MP.

Abstract: A method, apparatus and system for processing User Generated Content are provided. The method comprises sending a request for obtaining UGC information to a network device; receiving UGC information returned by the network device in response to the request for obtaining UGC information; determining whether UGC in a local cache is the latest UGC based on the UGC information; and downloading UGC from the network device if UGC in the local cache is not the latest UGC.

Abstract: Communication methods, systems, servers, and client devices in a user-interactive system are provided herein. In an exemplary method, a communication interface can be started via a first user-interactive client by a first user to communicate with one or more communication tools via a communication backend server. The first user-interactive client can obtain and display a plurality of second user IDs of second users. The first user-interactive client can receive one or more second user IDs selected by the first user to add to a communication group. The first user-interactive client can send to the communication backend server a message for joining the communication group containing the one or more second user IDs. After receiving an accepting message from the communication backend server, during a user-interactive operation, the first user-interactive client can communicate with a second client corresponding to a user ID contained in the accepting message.

Abstract: A method and system for broadcasting pictures across multiple user terminals are provided. The method includes generating a user signature based on information associated with the picture, and receiving a request to broadcast the picture, the request including the user signature. The method further includes broadcasting the picture if the user signature is valid. The method and system may improve a user's online experience by eliminating unauthorized broadcasts from unauthorized users.

Abstract: A method, apparatus and system for processing User Generated Content are provided. The method comprises sending a request for obtaining UGC information to a network device; receiving UGC information returned by the network device in response to the request for obtaining UGC information; determining whether UGC in a local cache is the latest UGC based on the UGC information; and downloading UGC from the network device if UGC in the local cache is not the latest UGC.

Abstract: Communication methods, systems, servers, and client devices in a user-interactive system are provided herein. In an exemplary method, a communication interface can be started via a first user-interactive client by a first user to communicate with one or more communication tools via a communication backend server. The first user-interactive client can obtain and display a plurality of second user IDs of second users. The first user-interactive client can receive one or more second user IDs selected by the first user to add to a communication group. The first user-interactive client can send to the communication backend server a message for joining the communication group containing the one or more second user IDs. After receiving an accepting message from the communication backend server, during a user-interactive operation, the first user-interactive client can communicate with a second client corresponding to a user ID contained in the accepting message.

Abstract: A method and system for broadcasting pictures across multiple user terminals are provided. The method includes generating a user signature based on information associated with the picture, and receiving a request to broadcast the picture, the request including the user signature. The method further includes broadcasting the picture if the user signature is valid. The method and system may improve a user's online experience by eliminating unauthorized broadcasts from unauthorized users.