Abstract: A method and apparatus are provided for transmitting power headroom information by a terminal in a mobile communication system. The method includes receiving, by the terminal, information for an allocated uplink transmission resource; identifying whether a path loss has changed by more than a threshold, after transmitting last power headroom information, when the terminal has the allocated uplink transmission resource; in case that the path loss has changed by more than the threshold when the terminal has the allocated uplink transmission resource, determining a transmission of the power headroom information; and transmitting an uplink packet including the power headroom information based on the allocated uplink transmission resource. The power headroom information is obtained based on a difference between a maximum transmission power of the terminal and a transmission power of the terminal.

Abstract: A method and apparatus are provided for transmitting power headroom information by a terminal in a mobile communication system. The method includes receiving, by the terminal, information on an allocated uplink transmission resource; determining whether a path loss has changed more than a threshold, after transmitting last power headroom information, when the terminal has the allocated uplink transmission resource; if the path loss has changed more than the threshold when the terminal has the allocated uplink transmission resource, determining a transmission of the power headroom information; and transmitting an uplink packet including the power headroom information using the allocated uplink transmission resource. The power headroom information is obtained based on a difference between a maximum transmission power of the terminal and a transmission power of the terminal.

Abstract: A system and method for phase alignment of multiple PLLs are disclosed. The system comprises a plurality N of PLLs (PLL_1 . . . PLL_N) and a plurality N of phase detectors (DET_1 . . . DET_N). The plurality N of phase detectors and the plurality N of PLLs are connected in a loop such that an i-th phase detector (DET_i) is configured to receive an i-th feedback signal (FB_i) generated from the i-th PLL and an (i+1)-th feedback signal (FB_i+1) generated from the (i+1)-th PLL, and the N-th phase detector (DET_N) is configured to receive the first feedback signal (FB_1) generated from the first PLL and the N-th feedback signal (FB_N) generated from the N-th PLL. The an i-th phase detector (DET_i) is configured to generate an i-th adjustment signal indicating an i-th phase difference between the i-th and (i+1)-th feedback signals for adjusting a phase of the i-th or (i+1)-th PLL, wherein i=1, 2, 3, . . . N?1.

Abstract: Disclosed are a wireless transmitter and a reference signal transmission method that improve channel estimation accuracy. In a terminal, which transmits a reference signal using n (n is a non-negative integer 2 or greater) band blocks (which correspond to clusters here), which are disposed with spaces therebetween in a frequency direction, a reference signal controller switches the reference signal formation method of a reference signal generator between a first formation method and a second formation method based on the number (n) of band blocks. In addition, a threshold value setting unit adjusts a switching threshold value based on the frequency spacing between band blocks. Thus, the reference signal formation method can be selected with good accuracy and, as a result, channel estimation accuracy is further improved.

Abstract: A distributed antenna system (DAS) includes: a base station network interface; and a remote antenna unit communicatively coupled to the first base station interface, the remote antenna unit including an antenna. The remote antenna unit configured to: receive a radio frequency band signal from a subscriber unit; convert the radio frequency band signal into a data stream; and communicate the data stream with the first base station network interface. The first base station network interface is configured to: convert the data stream or a signal derived from the data stream into a communication signal, wherein a mater reference clock is distributed between various components of the DAS to keep the various components of the DAS locked to a single clock; and communicate the communication signal and the master reference clock to an external device, the external device configured to lock its clock to the master reference clock.

Abstract: An uplink power allocation method, an uplink power allocation device and an uplink power allocation system are provided. The uplink power allocation method includes: determining users to be paired, based on locations of the users within the cell; determining Patten Division Multiple Access (PDMA) pattern matrixes, allocating different PDMA pattern vector groups for the users respectively, and obtaining a power control pattern matrix based on the PDMA pattern vector groups; and determining power control factors of the users in each pair based on the power control pattern matrix, and determining an uplink transmission power of each user based on the power control factors.

Abstract: Embodiments are provided for syncing multiple electronic devices for collective audio playback. According to certain aspects, a master device connects (218) to a slave device via a wireless connection. The master device calculates (224) a network latency via a series of network latency pings with the slave device and sends (225) the network latency to the slave device. Further, the master devices sends (232) a portion of an audio file as well as a timing instruction including a system time to the slave device. The master device initiates (234) playback of the portion of the audio file and the slave devices initiates (236) playback of the portion of the audio file according to the timing instruction and a calculated system clock offset value.

Abstract: Embodiments are provided for syncing multiple electronic devices for collective audio playback. According to certain aspects, a master device connects (218) to a slave device via a wireless connection. The master device calculates (224) a network latency via a series of network latency pings with the slave device and sends (225) the network latency to the slave device. Further, the master devices sends (232) a portion of an audio file as well as a timing instruction including a system time to the slave device. The master device initiates (234) playback of the portion of the audio file and the slave devices initiates (236) playback of the portion of the audio file according to the timing instruction and a calculated system clock offset value.

Abstract: An electronic device according to one embodiment includes a touch screen, a plurality of software keys that are aligned along an edge of the touch screen, a storage that stores address list data, a communication unit that establishes telephone communication, and a controller. If detecting an incoming phone call by the communication unit, the controller identifies a first group to which the incoming phone call belongs based on information relating to the incoming phone call and information of the address list data, and assigns the identified first group to the software key.

Abstract: Presence detection using Bluetooth and hybrid-mode transmitters is disclosed. In some embodiments, one or more transmitters are configured to transmit an iBeacon broadcast and a proprietary Bluetooth Low Energy (BTLE) broadcast, wherein at least one of the transmitted broadcasts includes an identifier that specifies a venue. The broadcasts are captured by a handset and decoded to infer presence of the handset at the venue.

Abstract: Embodiments are provided for syncing multiple electronic devices for collective audio playback. According to certain aspects, a master device connects (218) to a slave device via a wireless connection. The master device calculates (224) a network latency via a series of network latency pings with the slave device and sends (225) the network latency to the slave device. Further, the master devices sends (232) a portion of an audio file as well as a timing instruction including a system time to the slave device. The master device initiates (234) playback of the portion of the audio file and the slave devices initiates (236) playback of the portion of the audio file according to the timing instruction and a calculated system clock offset value.

Abstract: A mobile terminal is provided to address limitations of related art input systems. The mobile terminal includes a display unit, a support bracket including a support part configured to support a backside of the display unit and an extension part extending from the support part, a front window coupled with a front surface of the display unit and extension part, the front window including a rigid material, at least 3 front sensors located at the extension part of the support bracket, each generating a front force signal by receiving a front force applied to a prescribed point of the front window, and a controller measuring an applied point and magnitude of the front force through the front force signal generated by each of the at least 3 front sensors. When a force is applied, a location and magnitude of the force is measured and recognized as a classified input signal.

Abstract: Embodiments are provided for syncing multiple electronic devices for collective audio playback. According to certain aspects, a master device connects (218) to a slave device via a wireless connection. The master device calculates (224) a network latency via a series of network latency pings with the slave device and sends (225) the network latency to the slave device. Further, the master devices sends (232) a portion of an audio file as well as a timing instruction including a system time to the slave device. The master device initiates (234) playback of the portion of the audio file and the slave devices initiates (236) playback of the portion of the audio file according to the timing instruction and a calculated system clock offset value.

Abstract: To reduce wireless interference (noise) in a network environment, a management resource communicates a notification to multiple wireless access points. The notification indicates a wireless power transmit test to be performed with respect to the primary wireless access point in a vicinity of the multiple wireless access points. In accordance with the wireless power transmit test, the primary wireless access point transmits multiple test communications at different wireless power levels from the primary wireless access point to the multiple wireless access points. The multiple wireless access points generate feedback based on their ability to receive the test communications. The feedback indicates wireless power levels at which the multiple wireless access points receive the test communications at different power levels from the primary wireless access point.

Abstract: Methods, systems, and devices for wireless communications are described, in which for one or more aspects of a first transmission of a first radio access technology (RAT) (e.g., a 5G or New Radio (NR) RAT) are determined based on transmissions of a second RAT (e.g., a 4G or Long Term Evolution (LTE) RAT). A user equipment (UE) may, in some cases, determine a reference timing, a reference power, or combinations thereof for an uplink transmission of the first RAT based on a received power or reference timing of the second RAT. In some cases, handover for the first RAT may be based at least in part on an handover in the second RAT.

Abstract: In a wireless communication system, a control channel is required in order to use limited resources effectively. However, the control channel resource is part of the system overhead, and thus reduces the data channel resource used for data transmission. In the long term evolution (LTE) system based on OFDM, one sub frame the consists of fourteen OFDM symbols wherein a maximum of three OFDM symbols are used for the control channel resource and remaining eleven OFDM symbols are used for the data channel resource. Therefore, the quantity of energy that can be transmitted for the control channel resource is extremely limited compared to the data channel resource. For this reason, the coverage of the control channel becomes less than that of the data channel, and even if a user can successfully receive the data channel, reception failure of a control channel sometimes results in failure of data recovery.

Abstract: In some aspects, a mobile application package is bound to a privileged component of a mobile device operating system. The mobile application package includes a software virtualization layer and a management service component. The software virtualization layer and the management service component are enabled to execute in a privileged mode based on the privileged component. A virtual phone image is downloaded from a management server. A virtual machine based on the virtual phone image is launched by the software virtualization layer.

Abstract: A removable module for a phased array, the module including: a circuit board having a ground plane formed on one side of the circuit board; an antenna mounted on and extending away from a topside of the circuit board; circuitry on a backside of the circuit board, the circuitry including an RF front end circuit coupled to the antenna; and a group of one or more first connecters mounted on the backside of the circuit board, the first connectors for physically and electrically connecting and disconnecting the module from a master board through a corresponding group of one or more matching second connectors on the master board, the first connectors on the module having electrically conductive lines for carrying an externally supplied LO signal for the RF front end circuit and an IF signal for or from the RF front end circuit.

Abstract: A radio station (100) receives a first signal (R) indicative of a scheduled resource which will be used to transmit a second signal (D1, D2) to the radio station (100). In response to receiving the first signal (R), the radio station (100) is adapted to receive the second signal (D1, D2) using the scheduled resource and, prior to receiving the second signal (D1, D2), transmit an indication of received signal quality (CQI).

Abstract: Systems and associated methods for reducing Doppler shifts in the broadband signals between Unmanned Aerial Vehicles (UAVs) and ground stations are disclosed herein. In one embodiment, a method for reducing the Doppler shift of wireless signals includes estimating a velocity of the UAV based on a Global Positioning System (GPS) or an Inertial Measurement Unit (IMU) of the UAV and calculating the Doppler shift of an upload (UL) wireless signal based on the velocity of the UAV. The method further includes predistorting a frequency of the UL wireless signal at the ground station to reduce the Doppler shift at a UAV receiver (RX) and transmitting the UL wireless signal from a ground station transmitter (TX) to the UAV RX. In some embodiments, calculating the Doppler shift of the UL wireless signal is performed at the ground station.