Abstract: A communication system includes a flexible circuit board, a plurality of antennas disposed on the flexible circuit board, and a radio frequency (RF) tag. A distance between the RF tag and at least one antenna among the plurality of antennas is detected based on a signal emitted by the RF tag and received by the at least one antenna. Further, a deformation of the flexible circuit board is detected based on the distance between the RF tag and the at least one antenna.

Abstract: A communication apparatus capable of multi-user communication in which signals are multiplexed and communicated to one or more other communication apparatuses, the communication apparatus determines whether to transmit an MU-RTS (Multi User Request To Send) frame based on a size of data scheduled to be transmitted or received in accordance with the multi-user communication, and, in a case where it is determined to transmit the MU-RTS frame, transmits the MU-RTS frame prior to the multi-user communication.

Abstract: Systems, apparatuses, and methods are described for wireless communications. A wireless device may transmit a buffer status report. Based on the buffer status report, the wireless device may receive a control command to use radio resources of a secondary cell. The wireless device may transmit a random access preamble via the secondary cell.

Abstract: A wireless communications system is configured to perform wireless communication by using a first band dedicated to the system and a second band shared by the system and another wireless communications system. The system includes a base station configured to transmit in the first band to a terminal when detecting an available carrier wave of the second band, a control signal permitting data transmission in the second band from the terminal to the base station, the base station continuously sending out a radio wave of the second band during a period until the data transmission; and the terminal configured to perform the data transmission after a predetermined time from transmission of the control signal by the base station.

Abstract: A communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for internet of things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology. The present disclosure provides a method and an apparatus for performing a random access by a terminal in a wireless communication system by starting a backoff timer for a random access preamble retransmission, determining whether a criterion to select a contention free random access resource is met during the backoff timer, selecting a random access resource for a transmission of a random access preamble when the criterion is met during the backoff timer, and transmitting, to a base station, the random access preamble in the selected random access resource.

Abstract: A base station transmits and a UE detects broadcast information when the UE operates in a Coverage Enhancement (CE) mode. The base station transmits repetitions of signaling conveying broadcast information in one or more subframes of each frame in a quadruple of frames. The transmission is intermittent in time. To detect the broadcast information, the UE blindly combines and decodes the repetitions of signaling assuming their existence. The base station informs the pattern for the intermittent transmissions of the signaling to UEs connected to the base station or to other base stations.

Abstract: An electronically beam-steerable full-duplex phased array antenna is described. The phased array antenna includes an array of a plurality of radiating elements. The array includes at least one column having a plurality of radiating elements, and the array is configured to generate a radiation field. The phased array antenna includes a metasurface over the array of radiating elements. The metasurface introduces a phase shift to the radiation field of the array, to cause a beam of the phased array antenna to be angularly offset from the radiation field of the array.

Abstract: A base station transmits and a UE detects broadcast information when the UE operates in a Coverage Enhancement (CE) mode. The base station transmits repetitions of signaling conveying broadcast information in one or more subframes of each frame in a quadruple of frames. The transmission is intermittent in time. To detect the broadcast information, the UE blindly combines and decodes the repetitions of signaling assuming their existence. The base station informs the pattern for the intermittent transmissions of the signaling to UEs connected to the base station or to other base stations.

Abstract: A method and apparatus for supporting A-MSDU data transfer in an A-MPDU system includes sending capability information from a first network device, receiving onto the first network device an A-MPDU frame that includes A-MSDU data, and sending an acknowledgment from the first network device. A bit field in the capability information indicates if inclusion of A-MSDU data in an A-MPDU payload is supported. The first network device is a wireless station (STA). The first network device is part of a peer-to-peer network. The A-MSDU is in a data enabled immediate response context. A bit field in the capability information indicates if receiving an A-MPDU frame including A-MSDU data carried in a QoS Data frame without a block acknowledgment agreement is supported.

Abstract: A device for reducing a self-interference contribution in a full-duplex wireless communication system configured to transmit a transmission signal and modulated by a baseband signal, and configured to receive a reception signal containing a self-interference contribution corresponding to the transmission signal, the reduction device comprising a first reduction module, configured to take a replica of the transmission signal, and configured to generate a first reduction signal, the device further comprising: a second reduction module, arranged so as to be able to take a replica of the baseband signal, and capable of generating a second reduction signal that is a function of the temporal derivative of the baseband signal, a subtractor, linked to the first reduction module and to the second reduction module, and configured to subtract from the reception signal the first reduction signal and the second reduction signal.

Abstract: The present invention relates to a method for transmitting control information for device-to-device (D2D) communication of a D2D transmission terminal in a wireless communication system, comprising the steps of: receiving a resource pool configuration for D2D communication; and mapping control information for a D2D reception terminal onto a resource pool related to a scheduling assignment, wherein the control information includes information for a D2D signal transmission of the D2D reception terminal to the D2D transmission terminal, and is unicast to the D2D reception terminal.

Abstract: A method and an apparatus. The method includes receiving a signal including a serving signal and an interference signal; applying a Gaussian approximation (GA) on the serving signal and the interference signal; determining likelihood metrics for hypotheses on a rank of the interference signal, a precoding matrix index, and power on the GA-applied interference signal based on a covariance matrix for each of the hypotheses; and selecting one of the hypotheses that maximizes one of the likelihood metrics.

Abstract: A signal transmission method includes: processing, by a base station, a first baseband signal, a second baseband signal, a third baseband signal, and a fourth baseband signal by using a VAM matrix, to obtain four processed signals; performing precoding processing on the four processed signals to obtain four coded signals; and sending the four coded signals to a mobile terminal by using four radio frequency ports. The four radio frequency ports are in a one-to-one correspondence with the four coded signals. A first processed signal is the same as a third processed signal, a second processed signal is the same as a fourth processed signal. The first processed signal is obtained by performing superposition on the first baseband signal and the third baseband signal, and the second processed signal is obtained by performing superposition on the second baseband signal and the fourth baseband signal.

Abstract: The present disclosure discloses a method and network device for dynamic detection of inactive virtual private network clients. Specifically, a network device receives periodic messages from a first device at a first interval, and determines a timeout value for the first device based at least on the first interval, at which the periodic messages are received from the first device. Subsequent to determining the timeout value, the network device detects that a message has not been received from the first device for a period of time corresponding to the timeout value for the first device. The network device then terminates at least one connection with the first device responsive to determining that no message has been received from the first device for the period of time corresponding to the timeout value for the first device.

Abstract: In one embodiment, a signal transduction system includes an arrangement of interacting unit cells. Each unit cell can have one or more adjustable parameters that are adjustable to enable one or more adjustable impedance values of the unit cells at each of one or more operational frequencies. The interactions of the unit cells within the arrangement of the interacting unit cells can be describable with an interaction matrix that is approximately independent of the adjustable impedance values of the unit cells.

Abstract: According to one embodiment, an electronic apparatus includes a transmitter circuitry and a receiver circuitry. The transmitter circuitry is configured to; transmit a first frame to a first terminal, and transmit a second frame to a second terminal when a first period elapsed after transmission of the first frame. The receiver circuitry is configured to receive a third frame including acknowledgement information of the first frame from the first terminal when the first period elapsed after transmission of the first frame. A duration of the second frame is set as equal to or greater than a difference between a duration of the third frame and a duration of the first frame.

Abstract: A method of transmitting includes categorizing a transmission between the first device and a second device as one of a plurality of transmission types, and selecting an air interface from a plurality of air interface candidates in accordance with the transmission as categorized. The method also includes sending the transmission to the second device using the selected air interface.

Abstract: A wireless packet switch and methods for controlling the same include a multiple port controllers, each in communication with a respective wireless transceiver, configured to analyze data streams to and from the respective wireless transceiver; a cross-connect switch in communication with all of the port controllers, configured to provide connections between respective port controllers; an arbiter, in communication with all of the port controllers and with the cross-connect switch, configured to control the cross-connect switch, such that the cross-connect switch connects data streams of the port controllers in accordance with packet destination information and scheduling information from the port controllers.

Abstract: The present invention relates to a method and apparatus for processing reverse transmission resources of a user terminal in a mobile communication system. When receiving a plurality of grants, the method and apparatus sum resources allocated by the grants, distribute the summed resources to logical channels, map the resources distributed by the logical channels and the logical channels to MAC PDUs according to the data sizes of the MAC PDUs, and allocate the resources distributed by the mapped logical channels.

Abstract: An apparatus includes: a display unit; a communication unit configured to communicate with a plurality of devices external to the apparatus; and a processor configured to control the display unit to display a first user interface (UI) image including a list of content files stored in a first device of the plurality of devices and a second UI image including a list of applications stored in a second device of the plurality of devices, and, in response to receiving a first user input selecting a content file from the list of content files in the first UI image and a second user input selecting an application from the list of applications in the second UI image, to control the selected content file to be processed by the selected application in the second device.

Abstract: A D2D communication control apparatus (10) according to the present invention includes: a communication unit (11) configured to receive determination information that can be used to determine whether each of a plurality of radio terminals is capable of performing device-to-device (D2D) communication with another radio terminal; and a selection unit (12) configured to select, using the determination information between radio terminals that may operate as relay radio terminals, a candidate for a relay radio terminal that relays the communication between one of the plurality of radio terminals and a network, the relay radio terminal candidate transmitting a response signal in response to a first discovery signal transmitted from one of the radio terminals by performing D2D communication with the one of the plurality of radio terminals and performing cellular communication with the network.

Abstract: According to an embodiment of this disclosure, a method for transmitting and receiving a signal in a device of a mobile communication system includes steps of receiving, from a base station, a first message containing one or more of synchronization information and resource allocation information; transmitting, to other device, a second message containing the received synchronization information and resource allocation information; and receiving, from the other device, a third message for a random access based on the synchronization information and the resource allocation information. According to an embodiment of the present disclosure, even a device failing to obtain synchronization can obtain synchronization from a base station through other device, receive authentication and security related information, and thereby perform reliable D2D communication. Also, a communication efficiency can be improved by transmitting and receiving D2D related information between devices through limited resources.

Abstract: Provided is a communication device based on a flexible circuit board communicating wirelessly. The communication device includes: a control unit configured to collectively control the communication device based on the flexible circuit board; a power supply unit configured to supply power to a configuration included in the communication device based on the flexible circuit board based on a control of the control unit; a flexible circuit board; and a plurality of antennas disposed on the flexible circuit board.

Abstract: Isolation for antennas in a wireless communication system is achieved between transmit and receive paths for a multiple input multiple output (MIMO) antenna array by separating a first transmit path from an associated receive path to be matched with a second transmit path and matching the first receive path with the second receive path. It is expected that the two transmit paths operate on sufficiently different frequencies that there is minimal interference there and the additional spacing from the transmit path to the receive path will reduce interference therebetween without increasing a footprint of the antenna array.

Abstract: Techniques for transmitting reference signals (RSs) having respective signal patterns in the coding chain to improve performance of multiple input, multiple output (MIMO) communication systems are presented. For downlink transmissions, an RS management component (RSMC) of a network node can determine a first resource element (RE) pattern for RSs of a first cell and a second RE pattern for RSs of a second cell in the time, frequency, or code domain RSMC can utilize an adaptive interleaver in the coding chain to improve performance of MIMO systems. RSMC can facilitate configuring user equipment (UE) about the interleaver at the RE domain or as part of virtual resource block (VRB)-to-physical resource block (PRB) domain. RSMC can thereby reduce interference on RSs from other co-channel RSs, thereby improving channel estimation performance for channel-state-information estimation and data detection by the UE, and achieving significant gains in link and system throughputs.

Abstract: A matching network system combined with a circulator, and a method thereof are provided. In the matching network system and method, a reflection coefficient per frequency, required to cancel a signal leaked (a leakage signal) from a port combined with an antenna (an antenna port) is calculated, an impedance value is calculated from the calculated reflection coefficient, and any antenna is matched to a matching network by using a matching network circuit for changing an impedance value of the antenna to the calculated impedance value. Therefore, cancellation of the leakage signal is controlled. In this manner, the isolation performance of the circulator in a plurality of frequencies can be increased.

Abstract: Provided are a method and an apparatus for measuring inter-RU interference in order to perform space division duplex communication in a wireless communication system. Specifically, a terminal acquires first interference information indicating the strength of inter-RU interference after analog interference cancellation, and second interference information indicating the strength of inter-RU interference before analog interference cancellation. The terminal determines whether space division duplex communication can be performed between RUs, by comparing the interference strength indicated by the first interference information with a first threshold. The terminal determines whether inter-RU interference needs to be periodically measured, by comparing the interference strength indicated by the second interference information with a second threshold.

Abstract: A beam training method includes: determining, by a terminal device, to send n pilot sequences to a network device by using n beams in n timeslots within one uplink beam training period, where the n pilot sequences are at least partially different, and n is a positive integer greater than 1; and sending, by the terminal device, the determined n pilot sequences to the network device by using the n beams in the n timeslots within the uplink beam training period.

Abstract: A method of transmitting includes categorizing a transmission between the first device and a second device as one of a plurality of transmission types, and selecting an air interface from a plurality of air interface candidates in accordance with the transmission as categorized. The method also includes sending the transmission to the second device using the selected air interface.

Abstract: Example methods and apparatus for configuring an antenna are disclosed. One method includes determining a communication status of each of a plurality of communications modules in a terminal device. An antenna use priority of each communications module is determined based on the communication status of the communications module. An antenna for each communications module is configured based on the antenna use priority of the communications module.

Abstract: Various communication systems may have various mechanisms for handling data loss. For example, certain wireless communication systems may benefit from appropriate handling of uplink coordinated multipoint helper data loss on a subset of symbols within a transmission time interval. A method can include receiving helper data corresponding to a portion of an uplink subframe. The method can also include performing coordinated multipoint processing on the portion of the uplink subframe using the helper data.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine a first hybrid automatic repeat request acknowledgement (HARQ-ACK) payload for a first component carrier (CC) set based at least in part on a first downlink assignment index (DAI). The UE may determine a second HARQ-ACK payload for a second CC set based at least in part on a second DAI. The UE may transmit the first HARQ-ACK payload for the first CC set and the second HARQ-ACK payload for the second CC set. Numerous other aspects are provided.

Abstract: A technique is presented for correcting phase distortion in a digital wireless transmitter. The technique includes: receiving an RF signal in an analog domain by a digital-to-RF modulator; amplitude modulating, the RF signal in accordance with a digital input code; and introducing delay in a signal path traversed by the RF signal before the digital-to-RF modulator using a delay circuit. The duration of the delay depends upon the value of the digital input code and substantially cancels out the phase distortion introduced by the digital wireless transmitter.

Abstract: Communicating wireless devices collaborate and utilize waveforms to enable secure channel estimation. To protect against a repetitive replay attack, some embodiments include Single Carrier Physical Layer (SC-PHY) waveforms and/or interpolated OFDM waveforms that do not include a repeatable or predictable structure. The waveforms are transmitted in ranging packet structures that are compatible with legacy 802.11 technologies that do not utilize secure channel estimation. The ranging packets are received in combination with the information previously exchanged to enable the receiving wireless system to securely determine a channel estimate (e.g., determine a channel estimate without an interloper transmission that is not an authentic first arrival path in a multi-path channel between the wireless systems). Thus, one or both of the wireless systems can estimate the distance between them (or range). Devices utilizing legacy 802.

Abstract: A base station control method for a wireless communication system, a base station control apparatus, a wireless communication system and an electronic device. The wireless communication system includes a small cell. The base station control apparatus includes an upper limit determination unit and a frequency band control unit; wherein the upper limit determination unit is configured to determine the upper limit of the estimated number of small cells using unlicensed frequency bands in a target region according to available unlicensed frequency band resources and estimated service volume in the target region; and the frequency band control unit is configured to control one or more small cells to use or stop using the unlicensed frequency bands according to the upper limit of the estimated number, so that the number of small cells operating at the unlicensed frequency bands is not greater than the upper limit of the estimated number.

Abstract: A method for automatic Bluetooth connection in a head unit of vehicle includes discovering an advertisement from a mobile device, based on a period of advertisement discovery, when at least one advertisement corresponding to the mobile device is discovered, changing the period of advertisement discovery, discovering the advertisement based on a changed period of advertisement discovery, and arranging a Bluetooth connection between a head unit and a mobile device corresponding to the discovered advertisement.

Abstract: A wideband simultaneous transmit and receive (STAR) subsystem for a radar or communications system including self-interference cancellation and external noise cancellation. The STAR subsystem includes a canceller circuit which digitally prepares a cancellation signal to cancel out leaked or reflected portions of the transmit signal and correlated noise in the receiver signal. The self-interference cancellation can be adaptively configured in a closed-loop mode, and operated open loop in real time to minimize bandwidth limitations and achieve wideband performance. The STAR subsystem also includes an external noise active canceller which greatly diminishes high-power external noise in the receiver signal. The external noise canceller digitally synthesizes a cancellation signal which dramatically improves the signal-to-noise ratio in the receiver. Together, the combined cancellation techniques prevent receiver saturation and preserve receiver sensitivity.

Abstract: According to an embodiment, a communication apparatus includes a switching unit, a reception unit, a rising edge detector, a symbol detector, and a switching timing detector. The switching unit switches a transmission operation of a signal in the communication apparatus between uplink signal transmission and downlink signal transmission. The reception unit receives a signal transmitted in a time division multiplexing scheme. The rising edge detector detects a rising edge of a received signal received by the reception unit. The symbol detector detects a symbol of a signal indicating a guard time in the time division multiplexing scheme from the received signal. The switching timing detector detects a switching timing of the transmission operation from the switching unit on the basis of detection results of the rising edge detector and the symbol detector.

Abstract: A method of transmitting includes categorizing a transmission between the first device and a second device as one of a plurality of transmission types, and selecting an air interface from a plurality of air interface candidates in accordance with the transmission as categorized. The method also includes sending the transmission to the second device using the selected air interface.

Abstract: There is provided a user terminal capable of realizing a low delay communication in the next generation mobile communication system, including: a reception section that receives at least one downlink control information out of first downlink control information for scheduling reception of downlink data and second downlink control information for scheduling transmission of uplink data; and a control section that controls to perform reception of the downlink data and/or transmission of the uplink data corresponding to the downlink control information at a predetermined transmission time interval (TTI), wherein the control section is configured to set the predetermined TTI to the same TTI based on the TTI that has received the downlink control information, regardless of whether the downlink control information is the first downlink control information or the second downlink control information.

Abstract: The present invention relates to a wireless communication system and, specifically, provides a method for reporting a channel state and an apparatus therefor. A terminal of the present invention receives, from a base station, configuration information for a plurality of sets, each including at least one of a plurality of channel state information-reference signal (CSI-RS) resources configured for a channel state information (CSI) process. The terminal reports CSI measured on the basis of only at least one CSI-RS resource included in a first set which is one of the plurality of sets. Here, the first set may include only some CSI-RS resources of the plurality of CSI-RS resources configured for the CSI process.

Abstract: Methods and systems for wireless packet switching include determining a schedule for a plurality of transceivers in an enclosure. The schedule specifies which of the plurality of transceivers will act as a transmitter and which will act as a receiver. Data is transmitted from each transmitter to a corresponding receiver with a configured beamforming direction. Data is transmitted from a transmitter to a corresponding receiver by a wired connection if an angle of the beamforming direction is lower than a minimum angle.

Abstract: A method of transmitting includes categorizing a transmission between the first device and a second device as one of a plurality of transmission types, and selecting an air interface from a plurality of air interface candidates in accordance with the transmission as categorized. The method also includes sending the transmission to the second device using the selected air interface.

Abstract: In wireless communications, an access point may send a first frame to multiple stations. In one aspect, the first frame may include resource allocation information for uplink multi-user transmission. In response to the first frame, one or more stations may measure the channel characteristics associated with the first frame and send a second frame(s) for uplink multi-user transmission, where the second frame(s) includes resource preference information associated with the respective station(s). The access point may then generate and transmit a third frame based on the resource preference information. In another aspect, in response to the first frame, one or more stations may send a second frame(s) spanning the channel bandwidth supported by the respective station(s). The access point may measure the channel characteristics associated with the second frame and generate and transmit a third frame based on the measured channel characteristics.

Abstract: A method for wireless communication by a wireless communication device is described. The wireless communication device determines that an aggressor radio in the wireless communication device is causing (or can potentially cause) self-jamming to a victim radio in the wireless communication device. A precoding configuration is selected based on one or more link throughput metrics and one or more self-jamming metrics. The precoding configuration is applied to transmissions of the aggressor radio.

Abstract: In one embodiment, a signal transduction system includes an arrangement of interacting unit cells. Each unit cell can have one or more adjustable parameters that are adjustable to enable one or more adjustable impedance values of the unit cells at each of one or more operational frequencies. The interactions of the unit cells within the arrangement of the interacting unit cells can be describable with an interaction matrix that is approximately independent of the adjustable impedance values of the unit cells.

Abstract: In accordance with one or more aspects and corresponding disclosure thereof, various aspects are described in connection with channel state information (CSI) for a plurality of downlink carriers. In providing the CSI from a user equipment (UE), respective CSI reports may be determined for the plurality of downlink carriers. The respective CSI reports may be scheduled to be conveyed on a plurality of uplink carriers in a subframe. A determination may be made as to whether the UE is power limited for that subframe. Based at least in part on the determination, the respective CSI reports may be transmitted on the plurality of uplink carriers in the subframe, or transmitted on a subset of the plurality of uplink carriers in the subframe, or dropped.

Abstract: A method communicates between secured computer systems in a computer network infrastructure. Data packets are transmitted between a plurality from a group of processing computer systems, wherein such a transmission is performed by at least one broker computer system. The data packets are advantageously routed via at least one relay system connected upstream or downstream of the broker computer system in a transmission path of the data packets. All from the group of processing computer systems keep predetermined network ports at least temporarily closed so that access to a respective processing computer system via a network by the network ports is prevented. The relay system keeps predetermined network ports closed at least to the broker computer system, which has the relay system connected downstream so that access to the relay system via a network by the network ports is prevented.

Abstract: A method of transmitting includes categorizing a transmission between the first device and a second device as one of a plurality of transmission types, and selecting an air interface from a plurality of air interface candidates in accordance with the transmission as categorized. The method also includes sending the transmission to the second device using the selected air interface.

Abstract: A method of transmitting includes categorizing a transmission between the first device and a second device as one of a plurality of transmission types, and selecting an air interface from a plurality of air interface candidates in accordance with the transmission as categorized. The method also includes sending the transmission to the second device using the selected air interface.