A communication device of the disclosure includes a phase synchronizer, a modulator, and a controller. The phase synchronizer generates a second signal on a basis of a first signal received from a communication partner by selectively performing one of a closed loop operation and an open loop operation. The modulator is able to modulate the first signal on a basis of the second signal. The controller controls operations of the phase synchronizer and the modulator.

A communication device of the disclosure includes a phase synchronizer, a modulator, and a controller. The phase synchronizer generates a second signal on a basis of a first signal received from a communication partner by selectively performing one of a closed loop operation and an open loop operation. The modulator is able to modulate the first signal on a basis of the second signal. The controller controls operations of the phase synchronizer and the modulator.

There is disclosed a method of operating a user equipment in a radio access network. The user equipment is configured with a reference time resource available, in one or more slots, for transmission of a scheduling request by the user equipment, the reference time resource includes a reference symbol R, wherein each of the one or more slots has a slot duration that is based on a number N of symbols in the slot. The user equipment further is configured with a requesting periodicity P indicating a periodicity with a time period shorter than the slot duration. The method includes transmitting a scheduling request message at a request transmission symbol T which is based on the reference symbol R and the periodicity P. The disclosure also pertains to related methods and devices.

Provided are a control method for a wireless power transfer apparatus considering interference in wireless powered communication networks, and a wireless power transfer apparatus. The control method of the wireless power transfer apparatus includes: performing, by at least one wireless power transfer apparatus, a distributed coordination function (DCF) based contention process with at least one wireless communication terminal; and transmitting, by the wireless power transfer apparatus which won in the DCF based contention process, an energy frame to the at least one wireless communication terminal.

A method of operating a smart lighting system comprising a first mobile device, a lighting control device and first through nth (n being a positive integer) lighting devices, includes establishing, by the first mobile device, a first wireless connection with the lighting control device; performing, by the lighting control device, a first time synchronization with the first mobile device; providing, by the first mobile device, the lighting control device with a scheduling information representing operation of each of the first through nth lighting devices according to lapse of time; and controlling, by the lighting control device, operation of each of the first through nth lighting devices based on a current time and the scheduling information, wherein the current time is determined based on the time synchronization.

A communication robot for controlling an output device by performing an artificial intelligence (AI) algorithm and/or a machine learning algorithm in a 5G communication environment for Internet of Things (IoT), and a method for driving the same, are disclosed. Accordingly, the communication robot may control an output device based on a result of searching for at one or more output devices disposed in the given space and an operation mode of the communication robot, resulting in enhanced performance of the communication robot.

A communication device of the disclosure includes a phase synchronizer, a modulator, and a controller. The phase synchronizer generates a second signal on a basis of a first signal received from a communication partner by selectively performing one of a closed loop operation and an open loop operation. The modulator is able to modulate the first signal on a basis of the second signal. The controller controls operations of the phase synchronizer and the modulator.

This disclosure provides methods and systems for reducing congestion in RoCEv2 networks. The method is configured to operate large-scale in data centers on traffic flowing from a sender node to a receiver node. The method described has three stages: a fast start stage, a transition stage, and a regulation stage. In the fast start stage, the sender sends data to the receiver at a fast initial rate. This may continue until the receiver observes a congestion event. When this happens, the sender reduces the data transfer rate as the method enters the transition stage. From a reduced rate, the method enters the regulation stage, where the rate is increased using a combination of a feedback control loop and an additive increase multiplicative decrease (AIMD) algorithm.

A wireless network is provided that includes a base station and subscriber stations that communicate with the base station using radio frequency (RF) time division duplex (TDD) signaling. The base station may establish medium access control (MAC) connections with each station. The base station monitors communications with the stations and, in accordance, assigns stations or MAC connections to modulation groups. The base station transmits signals on MAC connections or to stations in a modulation group in adjacent TDD slots within a TDD frame. The base station may receive access requests from the stations, evaluate traffic requirements for the stations, and determine a longest downlink portion for the stations. The base station then allocates downlink and uplink portions of a TDD frame according to the length of the longest downlink portion.

There is disclosed a method of operating a user equipment in a radio access network. The user equipment is configured with a reference time resource available, in one or more slots, for transmission of a scheduling request by the user equipment, the reference time resource includes a reference symbol R, wherein each of the one or more slots has a slot duration that is based on a number N of symbols in the slot. The user equipment further is configured with a requesting periodicity P indicating a periodicity with a time period shorter than the slot duration. The method includes transmitting a scheduling request message at a request transmission symbol T which is based on the reference symbol R and the periodicity P. The disclosure also pertains to related methods and devices.