Abstract: Exemplary embodiments include a system having a first wireless audio output device configured to connect to a source device via a first piconet and a second wireless audio output device configured to connect to the first wireless audio output device via a second piconet. A schedule of the first piconet includes a plurality of slots associated with an audio packet, a first subset of the slots used by the source device to transmit the audio packet, the first and second wireless audio output devices tuning to the first piconet to listen for the transmissions of the audio packet, and when, after a last one of the first subset of slots, the first or second wireless audio output devices did not receive the audio packet, the first and second wireless audio output devices exchange information via the second piconet such that the both wireless audio output device receive the audio packet.

Abstract: A reference time determining method and apparatus are provided, to prevent aberrations in a control instruction execution time caused by inconsistency between a reference time of a terminal and a reference time of a control device in the conventional technology. In this application, the terminal may receive a plurality of pieces of time reference information sent by the network device. When the terminal receives indication information from the network device, the terminal may select, based on the indication information, one piece of time reference information from the plurality of pieces of time reference information as first time reference information. The indication information indicates the first time reference information. After determining the first time reference information, the terminal may determine the reference time of the terminal based on the first time reference information.

Abstract: Disclosed are a method and apparatus for transmitting an initial access signal, thus solving the existing problem wherein transmitting and detecting of synchronization signals cannot be applied to large-scale network coverage of a future communication system. The method comprises: determining at least one to-be-transmitted identification information of a synchronization block, the synchronization block comprising at least two components for transmitting an initial access signal, and different components occupying different time-frequency resources of the synchronization block; determining an initial access signal transmitted by each component in the synchronization block according to the identification information; and determining a time-frequency resource occupied by each component in the synchronization block and transmitting the initial access signal of the component on the time-frequency resource occupied by each component.

Abstract: An electronic device that transmits traffic in a wireless network is described. During operation, the electronic device transmits, using a first transceiver, a first type of traffic in a shared frequency band that is unlicensed. Then, the first transceiver reserves time for transmitting a second type of traffic in the shared frequency band. The reserved time may be determined in response to a request to reserve the time from a second transceiver in the electronic device transmitting the second type of traffic in the shared frequency band. Next, the first transceiver permits, in the reserved time, transmission by the second transceiver of the second type of traffic in the shared frequency band. Furthermore, the first transceiver prevents transmission of the first type of traffic during the reserved time, thereby segregating the first type of traffic from the second type of traffic in the shared frequency band.

Abstract: The present disclosure provides a method and a device in a communication node for wireless communications. The communication node in the present disclosure first receives first information, and then transmits a first radio signal; a length of a time interval between a start time for transmitting the first radio signal and a first reference time is equal to a sum of a first timing adjustment and a second timing adjustment, the first timing adjustment being one of X candidate timing adjustments, the X being a positive integer greater than 1; the second timing adjustment is used for determining a transmission timing of a radio signal transmitted before the first radio signal in time domain; a transmitter of the first radio signal determines the first timing adjustment out of the X candidate timing adjustments by itself. The present disclosure can improve uplink synchronization performance.

Abstract: A power control method of a base station in a wireless communication system based on Orthogonal Frequency Division Multiple Access (OFDMA) is provided for reducing power consumption by turning off the bias of the power amplifier for the duration of a symbol carrying no user data. The method includes checking scheduling information of radio resources, detecting a symbol carrying no user data, based on the scheduling information, and turning off a bias of the power amplifier for a symbol duration of the symbol carrying no user data. The transmission power control method is capable of reducing power consumption of the base station by turning off the bias of the power amplifier of the base station for the symbol duration in which no user data is transmitted.

Abstract: The present disclosure provides a method of generating codebook in a wireless communication system with multiple antenna arrays, as well as a wireless communication system, base station and terminal using the codebook for communication. The method comprises steps of: providing a basic codebook which contains multiple pre-coding matrices; and assigning phase offsets to certain pre-coding matrices in the basic codebook to form a codebook with phase offset. The feedback overhead from a client to a base station side is reduced and a good precision of feedback for multi-antenna array is kept by applying the method of generating codebook and using the generated codebook in the wireless communication system, base station and terminal.

Abstract: Systems, methods, and instrumentalities are disclosed for a wireless transmit/receive unit (WTRU) receiving a first set of one or more initial access signals from a Transmission/Reception Point (TRP), wherein the first set of one or more initial access signals indicates that the TRP is in a dormant state, sending an echo signal to the TRP, wherein one or more transmission parameters of the echo signal are derived from the first set of one or more initial access signals received from the TRP, monitoring for a second set of one or more initial access signals from the TRP after transmitting the echo signal, and receiving the second set of one or more initial access signals, the second set of initial access signals comprising information associated with accessing the TRP. Sets of one or more initial access signals may be received from a plurality of TRPs in an area.

Abstract: Provided is a mechanism which is capable of improving wireless link quality regarding transmission from a terminal device on the ground to a non-ground station device. A terminal device including a control unit configured to acquire information regarding a type of a base station device and control a transmission timing of a signal to the base station device on the basis of the information regarding the type of the base station device.

Abstract: A technique is provided for receiving, by a user device from a serving base station, a list of base stations including base station identities and/or respective information about their physical channels used for broadcast signaling for which a timing advance measurement is being requested, receiving, by the user device, a positioning reference identifier associated with a timing advance measurement procedure with respect to the user device and one or more base stations identified in the list, and sending, by the user device to one or more of the base stations identified in the list, an uplink signal including a synchronization sequence and the positioning reference identifier.

Abstract: An apparatus and method for adaptive network discovery signaling. Information is collected in a database of events, such as the discovery of a new station. The event information (e.g., new station, antenna sectors, active links) is shared with a central coordinator, or other stations in the network. Based on events, at this or other stations, signal transmission forms are adapted, for example for transmitting the beacon signals and notification signals. Adaptations of signal transmission include changing how frequently signaling is performed, timing of signaling, adjusting beam width, and/or adjusting directionality.

Abstract: An electronic device that transmits traffic in a wireless network is described. During operation, the electronic device transmits, using a first transceiver, a first type of traffic in a shared frequency band that is unlicensed. Then, the first transceiver reserves time for transmitting a second type of traffic in the shared frequency band. The reserved time may be determined in response to a request to reserve the time from a second transceiver in the electronic device transmitting the second type of traffic in the shared frequency band. Next, the first transceiver permits, in the reserved time, transmission by the second transceiver of the second type of traffic in the shared frequency band. Furthermore, the first transceiver prevents transmission of the first type of traffic during the reserved time, thereby segregating the first type of traffic from the second type of traffic in the shared frequency band.

Abstract: A method of searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, each cell group including at least two cells, includes: detecting a primary synchronization signal and a secondary synchronization signal from a received signal; and identifying a cell based on a combination of the primary synchronization signal and the secondary synchronization signal. The secondary synchronization signal is related to the cell group to which the mobile station belongs and the primary synchronization signal is related to the cell to which the mobile station belongs within the cell group.

Abstract: Generally described, aspects of the present application correspond to maintaining a message stream for a network-based data store, which stream includes messages reflecting modifications to the data store. Messages within the stream may be used to revert a state of the data store to a prior point in time reflected within the messages of the stream, such as by “rewinding” operations on the data store by use of the messages within the stream. Messages in the stream may further be used to asynchronously update a replica of the data store.

Abstract: Implicit sync group selection is performed by having dual interfaces to a gateway. A subsystem coupled to the gateway selects a sync group to be used for an upcoming exchange by selecting the interface to which a sync request is written to. The gateway propagates the sync requests and/or acknowledgments in dependence upon configuration settings for the sync group that is associated with the interface to which the sync request was written to.

Abstract: A method of searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, each cell group including at least two cells, includes: detecting a primary synchronization signal and a secondary synchronization signal from a received signal; and identifying a cell based on a combination of the primary synchronization signal and the secondary synchronization signal. The secondary synchronization signal is related to the cell group to which the mobile station belongs and the primary synchronization signal is related to the cell to which the mobile station belongs within the cell group.

Abstract: An electronic device forming part of a communication system includes first processing circuitry configured to receive a beacon from a counterpart device. The communication system also includes second processing circuitry that causes the counterpart device to set a transmitting and receiving operation as active state for a first operating period.

Abstract: A receiver includes a reception part, a determination part, and an estimation part. The reception part receives a packet train(s) formed by a plurality of packets transmitted from a transmitter. The determination part determines whether bandwidth limitation is executed in a network based on the received packet train(s). The estimation part selects a method for estimating an available bandwidth in the network based on whether or not the bandwidth limitation is executed and estimates the available bandwidth in the network in accordance with the selected method.

Abstract: The present invention relates to a method and a device for cell activation in a carrier aggregation system, and the method for activating a cell of a terminal according to one embodiment of the present invention comprises: a step for receiving an activation message of a first cell; a step for activating the first cell when the message of the first cell is received; an information obtaining step for obtaining uplink activation information of the first cell; and a transmission determination step for determining whether to execute an uplink transmission according to the uplink activation information. According to an embodiment of the present invention, efficient carrier management plan can be provided.

Abstract: Apparatuses, methods, and systems are disclosed for synchronization signal block reception and synchronization signal block transmission. One apparatus (200) for synchronization signal block reception includes a receiver (212) that receives (402) multiple synchronization signal blocks. The multiple synchronization signal blocks have different power levels corresponding to at least two synchronization signal blocks of the multiple synchronization signal blocks.

Abstract: A wireless terminal receives signaling information, pertaining to a reference signal transmission in at least one specifically designated sub frame, the signaling information including a list, the list including base station identities. The terminal determines, from at least one of the base station identities in the list, the time-frequency resources associated with a reference signal transmission intended for observed time difference of arrival (OTDOA) measurements from a transmitting base station associated with said one base station identity. The time of arrival of a transmission from the transmitting base station, relative to reference timing, is measured. The wireless terminal can receive a command from a serving cell to start performing inter-frequency OTDOA measurement on a frequency layer containing reference signals, the frequency layer distinct from the serving frequency layer, the serving frequency layer not containing positioning reference signals.

Abstract: A system and method of obtaining update information include receiving a request for an update from a mobile device, determining whether the request for update is for a scheduled update or an unscheduled update, in response to determining that the request for update is for an unscheduled update: requesting a first update information from a high-speed provider, receiving the first update information from the high-speed provider, and sending the first update information to the mobile device, and in response to determining the update is for a scheduled update: requesting a second update information from the telematics system, receiving the second update information from the telematics system, and sending the second update information to the mobile device.

Abstract: A method for data transmission includes receiving, by a controller of an unmanned aerial vehicle (UAV), target data from a transmitting terminal. The transmitting terminal includes a ground control apparatus or an onboard device of the UAV. The onboard device is connected with the UAV via a universal interface of the UAV. The universal interface is configured to connect onboard devices of various types. The method further includes forwarding the target data to a receiving terminal. The receiving terminal includes the ground control apparatus or the onboard device, and the receiving terminal is different from the transmitting terminal.

Abstract: A system includes a persistent storage and a data transfer manager. The persistent storage stores sending entity storage resources and receiving entity storage resources. The data transfer manager obtains a data transfer request for data in the sending entity storage resources. In response to obtaining the data transfer request, the data transfer manager obtains a sending entity schema associated with the data; determines a current storage location of the data using the obtained sending entity schema; determines a future storage location for a copy of the data in the receiving entity storage resources; stores a copy of the data at the determined future storage location; adapts the sending entity schema based on the determined future storage location; and modifies a receiving entity schema based on the adapted sending entity schema.

Abstract: An object of this technology is for one apparatus to effectively notify the other apparatus whether or not synchronization target clocks are correctly synchronized therebetween. A wireless apparatus includes a main control section, a wireless control section, and a clock synchronization management section. The main control section manages time using a first clock (synchronization target clock). The wireless control section manages time using a second clock (reference clock). The synchronization management section manages a clock synchronization state. The wireless control section notifies another wirelessly connected wireless apparatus of information regarding the clock synchronization state through transmission of a frame.

Abstract: Systems, methods, and apparatuses are described for coordinating wireless communication. Various devices may be configured for wireless communication. The wireless communications may be coordinated via a backhaul communication channel and may minimize interference between the communications.

Abstract: Embodiments of the present disclosure provide a method for transmitting data, including: sensing, by a first device, a scheduling assignment (SA) of another device; measuring a received power of the other device, and measuring a total received energy of a subframe/subband; determining a received power reference value and a total received energy reference value of the other device according to the SA; e selecting resources; and transmitting data using the selected resources. According to the method of the present disclosure, the performance of the method which avoids collision based on SA is improved, and measurement accuracy of the total received energy of the subband is increased. Thus, resource selection/re-selection can be performed better. As such, interferences between devices can be avoided effectively.

Abstract: The present invention discloses a method of transmitting an SSS (secondary synchronization signal), which is transmitted by a base station, in a wireless communication system. The method includes the steps of determining a first shift based on a first and a second cell identifiers for identifying a cell, and determining a second shift index based on the first cell identifier and transmitting the SSS using a first sequence which is generated based on the first shift index and a second sequence which is generated based on the second shift index. In this case, the first shift index can be determined as K times a value determined based on the first and second cell identifiers, where K is an integer equal to or greater than 3.

Abstract: A portable server is configured for storing content and for wireless communication with one or more clients for the wireless distribution of at least some of the stored content to one or more of the clients. The portable server is configured for wireless communication with at least one other portable server for use in providing a system for wirelessly distributing content to a plurality of clients in a local area such as a building or a vehicle and, in particular though not exclusively, an aircraft.

Abstract: A frequency manager in a multi-band wireless microphone system provides the synchronization of fixed RF devices (for example, transceivers) operating in distant parts (for example, two or more frequency bands) of the frequency spectrum. Each transceiver may be paired with a wireless microphone and provides synchronization with the paired wireless microphone. Antenna signals are separated or combined into a plurality of frequency bands using a multi-band filter. Band-specific low noise amplifiers and power amplifiers may be utilized for each frequency band so amplifier performance can be optimized. Prior to distribution by a splitter, the plurality of frequency bands is combined or separated using a second multi-band filter. Transceivers that are connected to the frequency manager may then independently operate in one band, different frequency bands or a combination of bands.

Abstract: A method for measurement pilot signal is provided. The method includes: determining, by a first device from a plurality of subbands included in system bandwidth, a first subband that is used to transmit a measurement pilot signal, where one subband includes at least one physical resource block; sending, by the first device, identifier information of the first subband to a second device; and transmitting the measurement pilot signal in at least one physical resource block corresponding to the first subband to the second device.

Abstract: Signals with unpredictable transmission properties enabling physically secure, unscheduled and interference-resistant machine-to-machine (M2M) communication are described. A physical dwell structure containing time slots and frequency channels is established, and a combination of unpredictable physical dwells, spread spectrum modulation with unpredictable spreading vectors, and unpredictable selection of intended receivers is described. These unpredictable transmission properties enable receivers to detect and extract transmissions intended for the receiver, and excise transmissions not intended for the receiver, even if they are received at much higher power levels than the intended transmissions.

Abstract: Signals with unpredictable transmission properties enabling physically secure, unscheduled and interference-resistant machine-to-machine (M2M) communication are described. A physical dwell structure containing time slots and frequency channels is established, and a combination of unpredictable physical dwells, spread spectrum modulation with unpredictable spreading vectors, and unpredictable selection of intended receivers is described. These unpredictable transmission properties enable receivers to detect and extract transmissions intended for the receiver, and excise transmissions not intended for the receiver, even if they are received at much higher power levels than the intended transmissions.

Abstract: A device is provided for detecting time information of different administrative domains. The device includes a plurality of detection units, wherein each detection unit is assigned to one of the administrative domains and is configured to receive time information from a timer of the assigned administrative domains for synchronising with the assigned administrative domains, a storage device having a plurality of storage areas, and a plurality of control units, wherein each control unit is assigned exclusively to one of the detection units and the control units are configured to detect, synchronised with one another, a respective most recent item of the received time information of the respective assigned detection unit and to store the synchronously detected time information of the plurality of detection units together as synchronised data in one of the storage regions.

Abstract: At least one antenna node is controlled to provide power correction instructions to a wireless communication device at an appropriate time when switching between uplink reception radio lobes, irrespective of which direction the reception radio lobes are directed in relation to the direction of movement of the wireless communication device. Loss of data and receive blocking problems can thereby be at least mitigated.

Abstract: A method for a small cell access point to use neighbour cell broadcast information to derive a cell candidate list is described. The method comprises, at the small cell access point: performing a network listen, NWL, scan and identifying a broadcast transmission from a plurality of macro cell base station, BTSs; detecting at least one parameter from each broadcast transmission, wherein the at least one parameter acts as a signature for small cell neighbours to distinguish small cell neighbours from macro cell neighbours; and using the at least one parameter to derive a cell candidate list of candidate operating parameters.

Abstract: An apparatus and method for adaptive network discovery signaling. Information is collected in a database of events, such as the discovery of a new station. The event information (e.g., new station, antenna sectors, active links) is shared with a central coordinator, or other stations in the network. Based on events, at this or other stations, signal transmission forms are adapted, for example for transmitting the beacon signals and notification signals. Adaptations of signal transmission include changing how frequently signaling is performed, timing of signaling, adjusting beam width, and/or adjusting directionality.

Abstract: Embodiments herein provide a method and system of reporting a charging information for a Device-to-Device (D2D) communication established using a wireless network. The method includes recording by a first electronic device the charging information associated with a D2D communication session. The D2D communication session is established between the first electronic device and a second electronic device. Further, the method includes determining by the first electronic device whether the charging information meets charging criteria during the D2D communication session. The charging criteria are generated by a network node in a secure environment of the first electronic device. Further, the method includes reporting the charging information to the network node in the wireless network in response to determining that the charging information meets the charging criteria.

Abstract: It takes a processing time to perform a security process on a time synchronization message, thus the difference of a delay time required for the security process can be made between a time at which the time synchronization message is actually transmitted and a transmission time assigned to the time synchronization message, and therefore, the difference between the actual transmission time of the time synchronization message and the assigned transmission time needs to be reduced. In generation of a secure time synchronization message in the synchronization system according to embodiments of the present invention, most of the security processes is performed in an upper layer which is an MAC layer or a higher layer, and processes including the assignment of the transmission time and assignment of authentication information for authenticating validity of the transmission time are performed in a physical layer.

Abstract: A data detector is disclosed. The data detector includes a memory and processing circuitry interfaced with the memory. The processing circuitry is configured to receive a digital signal representative of a radio frequency signal in the digital domain. The processing circuitry generates a frequency offset estimate derived from the digital signal and outputs the frequency offset to the memory and in turn receives output from the memory a set of coefficients that corresponds to the frequency offset estimate. The processing circuitry then performs a complex correlation between the digital signal and the set of coefficients to determine a maximum peak correlation.

Abstract: The present invention relates to a method and a device for cell activation in a carrier aggregation system, and the method for activating a cell of a terminal according to one embodiment of the present invention comprises: a step for receiving an activation message of a first cell; a step for activating the first cell when the message of the first cell is received; an information obtaining step for obtaining uplink activation information of the first cell; and a transmission determination step for determining whether to execute an uplink transmission according to the uplink activation information. According to an embodiment of the present invention, efficient carrier management plan can be provided.

Abstract: A user terminal that is capable of transmitting and receiving device-to-device signals, and has a receiving section that receives system information, which is transmitted from the connecting or serving radio base station and contains at least information about the resources for transmitting and receiving the device-to-device signals, and a control section that, based on the information about the device-to-device signal transmitting/receiving resources, executes control so that the device-to-device signals are transmitted and received in a second frequency carrier, which is different from a first frequency carrier, in which the information about the device-to-device signal transmitting/receiving resources is transmitted. Thus, the increase of power consumption in D2D terminals is prevented even when a frequency carrier that does not have an expanded coverage is used as a D2D signal transmitting/receiving resource where D2D operations are executed in a network in which multiple frequencies are in use.

Abstract: Apparatuses for storing, transmitting, and identifying changes in relation to, data are provided. One of these apparatuses is a server which includes a processor-implemented controller that receives data from a first electronic device external to the server, determines whether a user identification corresponding to a second electronic device external to the server matches a specified user identification, and transmits at least one portion of the data to the second electronic device based at least in part on a determination that the user identification matches the specified user identification.

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided in connection with LTE based paging for peer discovery. In one example, an eNodeB is equipped to receive a message including a D2D discovery notification for a UE, determine that the UE is in an idle mode, and transmit a paging notification to the UE including the D2D discovery notification. In another example, a UE is equipped to receive, from an eNodeB, a paging notification including a D2D discovery notification, determine, while in idle mode, that the D2D discovery notification is successfully decoded, and transmit an ACK to the eNodeB using a RACH sequence on a PRACH.

Abstract: There is provided mechanisms for determining complex weight vectors. A method is performed by a radio transceiver device. The method comprises obtaining measurements of reference signals. The reference signals are transmitted by another radio transceiver device by applying precoding weight vectors in a sequential order at an analog antenna array of said another radio transceiver device. The precoding weight vectors as well as the sequential order are known to the radio transceiver device. The method comprises determining channel estimates for each individual antenna element of the antenna array by using the measurements in combination with knowledge of the precoding weight vectors and the sequential order. The method comprises determining complex weight vectors to be used for subsequent data transmission from said another radio transceiver device based on the channel estimates. The method comprises providing an indication of the complex weight vectors to said another radio transceiver device.

Abstract: There is provided a communication control device including an acquisition unit configured to acquire a reception timing at which a second radio communication device receives a downlink signal from a base station performing radio communication with a first radio communication device or the second radio communication device, and a decision unit configured to decide a transmission timing at which the second radio communication device transmits a signal to the first radio communication device through inter-device communication based on the reception timing. The decided transmission timing is a timing later than a timing at which the second radio communication device transmits an uplink signal.

Abstract: A shared radar and communication system for a vehicle includes capabilities for radar detection and communication with vehicles equipped with similar systems. A transmitter transmits a modulated radio signal that is modulated based upon at least one of a first spreading code and a second spreading code. The second spreading code is defined by a first plurality of information bits. A receiver receives radio signals that include the transmitted radio signals transmitted by the transmitter and reflected from objects in an environment. A control unit is configured to select the first plurality of information bits. The selection of the information bits encodes selected information for transmission via the transmitted modulated radio signal to be received by another radar sensing system.

Abstract: The invention relates to a method and an arrangement for reducing power consumption of a receiver in a mobile communication network comprising a sender transmitting packet data on a downlink channel to one or more receivers over a radio interface. Inactive time instants and listening time instants are defined according to provided rules. The receiver is arranged to listen for information from the sender during the listening time instants and to sleep during the inactive time instants. Thus, less power will be consumed during the inactive time instants.

Abstract: A transmission apparatus includes: a data frame sequence generation part that generates a data frame sequence; a synchronization frame generation part that generates a synchronization frame constituted by n synchronization words each being either a first synchronization word or an inverted one of the first synchronization word; a communication frame generation part that generates a communication frame by adding the synchronization frame to a top portion of the data frame sequence; and a transmission part that transmits the communication frame. A reception apparatus includes: a reception part that receives the communication frame as a reception frame; a first synchronization detection part that performs first synchronization detection by detecting an arrangement pattern of the synchronization words in the synchronization frame of the reception frame; and a data reproduction part that reproduces data included in the reception frame according to the first synchronization detection.

Abstract: Disclosed are a method and a terminal for receiving a synchronization signal configured to: obtain information on a plurality of base station types in which a plurality of base stations are classified according to predetermined parameters; receive a synchronization signal from a base station of a cell where the terminal is positioned; estimate the number of repetitions of the synchronization signal and a band to which a sequence number of the synchronization signal belongs: select, using the estimation results, the base station type of a base station from which the synchronization signal was transmitted, from among the plurality of base station types; and perform a beam scanning process by considering the selected base station type.