A method for performing, by a first UE, device-to-device (D2D) communication in a wireless communication system includes: transmitting, to a first eNB, transmission/reception (TX/RX) chain number information indicating the number of supported TX/RV radio frequency (RF) chains; receiving, from the first eNB, a first control message including D2D resource pool configuration information of the first eNB; receiving, from the first eNB, a second control message including D2D resource pool configuration information of a second eNB; and transmitting a first D2D signal to the first eNB and/or transmitting a second D2D signal to the second to eNB using one or more TX RF chains when a predetermined condition is satisfied.

In one embodiment, a method for implementing two-way communication between at least first and second devices comprises steps of: (a1) during finite time periods following transmission of respective first messages from the first device to the second device, using the first device to listen for second messages transmitted from the second device to first device; and (a2) after each of the finite time periods following the transmission of the respective first messages from the first device to the second device, ceasing to use the first device to listen for second messages transmitted from the second device to the first device until after the first device transmits another first message to the second device.

A method for ground to air communication includes receiving a first pilot signal on a first wide beam from a first ground base station by a first antenna element covering a first range of azimuth angles from an aircraft. Data is received on a directed data beam from the first ground base station by the first antenna element. A second pilot signal is received on a second wide beam from a second ground base station by a second antenna element covering a second range of azimuth angles different than the first range of azimuth angles. A signal strength of the second pilot signal is compared with a signal strength of the first pilot signal. Data reception is switched from the first antenna element to the second antenna element if the signal strength of the second pilot signal is greater than the signal strength of the first pilot signal.

An Unmanned Aerial Vehicle (UAV) air traffic control method utilizing wireless networks and concurrently supporting delivery application authorization and management communicating with a plurality of UAVs via a plurality of cell towers associated with the wireless networks, wherein the plurality of UAVs each include hardware and antennas adapted to communicate to the plurality of cell towers; maintaining data associated with flight of each of the plurality of UAVs based on the communicating; processing the maintained data to perform a plurality of functions associated with air traffic control of the plurality of UAVs; and processing the maintained data to perform a plurality of functions for the delivery application authorization and management for each of the plurality of UAVs.

A method for dynamic and extensible creation of an extensible wireless network, using a set of drones that individually support server processes. The drones interact with one another, exchanging information, type of coverage, type and amount of throughput, location, etc. A control node connects to a wired network. The node operates a leader election protocol, captures state information from the drones, and positions/re-positions the drones as necessary. Drones are flown in to position and then engaged as necessary to stretch/adapt the coverage as necessary. The drone's power utilization is monitored and its coverage area modified as necessary to optimize power utilization. The control node performs drone-based coverage/power utilization computations, and attempts to apply the appropriate location assignments to provide maximum network coverage (extensibility) while also preserving drone-specific power (battery) utilization. The approach herein can be used to supplement existing networks during events, migrations of populations during work hours, etc.

Control circuitry in a terminal apparatus generates one or more groups, each group including a selected plurality of communication methods whose total value of specific absorption rates (SARs) is equal to or less than a threshold value, and generates group information indicating the one or more groups. N transmitters transmit transmission data to a plurality of communication stations that respectively support the plurality of communication methods included in one group that is indicated by the group information, by using corresponding communication methods.

The invention relates to a method for accessing an Internet protocol Multimedia Subsystem type subsystem, said subsystem. According to the invention, a device is firstly connected to a mobile communication network, as a visited network, said first network. The method comprises the following steps. The first network sends to the device a first message comprising current location data relating to a location where the device is currently present. The device analyses whether at least one roaming rule associated with the current location data is or is not stored within the device. The at least one roaming rule includes, each, at least one parameter for accessing the subsystem. And if the device does store the at least one roaming rule associated with the current location data, then the device sends to the subsystem a second message including a request for connecting to the subsystem. The invention also pertains to a corresponding device.

Various embodiments relate to a method, controller, and machine-readable storage medium for verifying controlled devices attached to the controller including one or more of the following: selecting, using a system model that models a system of devices comprising the controlled devices attached to the controller, a grouping of the system of devices to be tested; conducting a test of the grouping to produce a test result for the grouping, wherein conducting the test comprises transmitting a communication to at least one device associated with the grouping; choosing a graphical representation of a portion of the system model from a plurality of graphical representations based on the graphical representation including a representation of the grouping; and displaying, on a user interface, the graphical representation and an indication of the test result.

Various embodiments relate to a method, controller, and machine-readable storage medium for verifying controlled devices attached to the controller including one or more of the following: selecting, using a system model that models a system of devices comprising the controlled devices attached to the controller, a grouping of the system of devices to be tested; conducting a test of the grouping to produce a test result for the grouping, wherein conducting the test comprises transmitting a communication to at least one device associated with the grouping; choosing a graphical representation of a portion of the system model from a plurality of graphical representations based on the graphical representation including a representation of the grouping; and displaying, on a user interface, the graphical representation and an indication of the test result.

A method for receiving and transmitting synchronization signal is provided. The method is applicable to a wireless communication device. The wireless communication device has a local timing. The method includes the following steps. Receive at least one synchronization signal. If a signal power of at least one of the at least one synchronization signal is greater than or equal to a signal power threshold, select one of the at least one synchronization signal as a reference synchronization signal according to a priority rule, and synchronize the local timing to the reference synchronization signal. If the signal power of each the synchronization signal is less than the signal power threshold, send a local synchronization signal according to the local timing. If the reference synchronization signal meets a forwarding criterion, forward the reference synchronization signal, wherein the forwarding criterion includes a power constraint and a hop count constraint.