Abstract: Embodiments of efeMTC synchronization signals for enhanced cell search and enhanced system information acquisition are described. In some embodiments, an apparatus of a base station (BS) is configured to generate a length-x sequence for an efeMTC synchronization signal, the length-x sequence configured for repetition in frequency domain within 6 physical resource blocks (PRB). In some embodiments, to generate the length-x sequence, the BS may be configured to select any one index of the set of root indices {1, 2, . . . , 63}, excluding the root indices 25, 29 and 34, to correspond to a different physical-layer cell identity (PCID). In some embodiments, the BS may be configured to encode RRC signaling to include a System Information Block (SIB) comprising configuration information for transmission of the efeMTC synchronization signal, and transmit the length-x sequence as the efeMTC synchronization signal in frequency resources according to the SIB.

Abstract: A radio communication apparatus receives or generates a base address seed, and generates data-channel access addresses from the seed. Each access address corresponds to a respective data-channel identifier, and is generated by setting a bit at a common first bit position to the value of a bit at a first common predetermined bit position in the base address seed or in the respective data-channel identifier; by setting a bit at a common second bit position to the bitwise complement of this value; and by setting one or more remaining bit positions in dependence on values at one or more bit positions in the base address seed and one or more bit positions in the respective data-channel identifier that are not the first common predetermined bit position. The apparatus can send or receive a radio data packet comprising an access address from the generated set.

Abstract: A first apparatus may transmit, to a user equipment (UE), on a control channel, one or more indications of one or more beam indexes corresponding to one or more beams. The first apparatus may transmit, to the UE, one or more reference signals through the one or more beams corresponding to the one or more beam indexes. The reference signals may be used by the UE to select a best subarray and/or receive combiner for communication with the first apparatus.

Abstract: There is provided a method comprising determining, at a first access point, whether a carrier from a plurality of carriers is a primary listen-before-talk carrier or a secondary listen-before-talk carrier and providing information using the carrier, said information comprising an indication of whether the respective carrier is a primary listen-before-talk carrier or a secondary listen-before-talk carrier.

Abstract: Methods and apparatuses for neighbor discovery and wireless inter-connection in a wireless communication system. A method for operating a base station (BS) in the wireless communication network includes generating measurement information regarding neighboring BSs of the BS in the wireless communication network; determining a first parent BS of the neighboring BSs to connect to based on the measurement information; performing an initial access procedure with the first parent BS to connect to the first parent BS; identifying an end-to-end route for the BS for transfer of data between a user equipment (UE) and a gateway via the wireless communication network; and transferring the data between the gateway and the UE based on the identified end-to-end route.

Abstract: Disclosed are a signal transmission method and device. The method includes: a terminal receives a synchronization signal sent by a network side device; the terminal determines a beam Identifier (ID) and at least part of cell ID according to the synchronization signal; and the terminal transmits a subsequent signal according to the beam ID and/or the at least part of cell ID. In the embodiments, the terminal can determine the beam ID and the at least part of the cell ID according to the synchronization signal and thus the terminal determines a beam used when the subsequent signal is transmitted.

Abstract: A wireless device receives, during a first time interval, a command indicating activation of a physical uplink control channel (PUCCH) secondary cell of a timing advance group (TAG). A timing advance for the TAG is received. Transmission of valid channel state information is started via the PUCCH secondary cell during a second time interval occurring a first quantity of time intervals after the first time interval. The first quantity is based on a delay from receipt of the command until the wireless device applies the timing advance to uplink transmissions via the TAG.

Abstract: Certain aspects of the present disclosure relate to methods and apparatus synchronization configuration in different operation modes using communications systems operating according to new radio (NR) technologies. For example, a method for wireless communications by a base station (BS) may include determining an operation mode of the BS, determining a transmission configuration of at least one of a one or more synchronization channels or a one or more synchronization signals based on the operation mode, and transmitting the one or more synchronization channels or the one or more synchronization signals based on the determined transmission configuration.

Abstract: Disclosed is a method for performing a synchronization by a device-to-device (D2D) terminal in a wireless communication system supporting D2D communication. More particularly, a method for performing a synchronization by a D2D terminal comprises the steps of: receiving a synchronization reference signal from a first synchronization source and performing a synchronization; and, if the quality of the synchronization reference signal does not meet a predetermined standard, changing the synchronization source into a second synchronization source.

Abstract: The present invention relates to a method of detecting an access address of a physical channel in a Bluetooth signal to which channel coding is applied, the method including: performing initial signal processing in a unit of a specific length in a preamble section of a Bluetooth signal; and performing channel decoding in the specific length for a preamble part remained after the initial signal processing, wherein the specific length is a bit pattern length of a bitstream which is repeated in the preamble section or a length of a bitstream input for channel decoding. According to the present invention, channel decoding is performed in a unit of a bit pattern length of an access address from the remaining preamble part, and thus detection of the access address is available even though a start point of the access address is not provided.

Abstract: The present invention relates to a method of avoiding collision in a. More specifically, the present invention relates to a method of effectively avoiding collision when resources are allocated to and used by substantial mobile terminals in a synchronous wireless distribution communication system. The method of avoiding collision includes: determining, by a terminal, a slot to be transmitted in a main frequency channel; in a slot prior to the determined slot, performing contention using a contention deputy channel having a different frequency from the main frequency channel; and using the selected slot of the main frequency channel when winning the contention.

Abstract: A wireless speaker system includes a first transceiver and a second transceiver. The first transceiver is configured to establish a first wireless link with a data source for receiving a plurality of data packets, and to establish a second wireless link with a second transceiver for transmitting a set of parameters to the second transceiver to enable the second transceiver to sniff the plurality of data packets from the data source. The first transceiver is further configured to send a second acknowledgment to the data source via the first wireless link upon failure to receive the plurality of data packets from the data source via the first wireless link and upon receiving a first acknowledgment from the second wireless transceiver via the second wireless link.

Abstract: The present invention is designed to configure RRM measurement properly. A user terminal according to one aspect of the present invention has a receiving section that receives information about a parameter that is common among a plurality of resources for a reference signal, and a control section that controls, based on information about the parameter, reporting of results of measurement using the reference signal in part of the plurality of resources, and information about measured resources.

Abstract: A Bluetooth device with a host system and a controller is disclosed. The host system supports a host stack of a Bluetooth protocol, and the controller supports a controller stack of the Bluetooth protocol. The device includes an interface for receiving, at the controller, a piconet-synchronized signal. The device also includes an interface for providing, by the controller to the host system, a derivative of the piconet-synchronized signal. The device also includes a circuit for determining a latency of the providing. The device also includes a circuit for synchronizing, at the host system of the Bluetooth device, a host clock with a timing reference of a master device of the Bluetooth piconet using said latency and the derivative of the piconet-synchronized signal.

Abstract: An embodiment of the present invention relates to a method in which a terminal transmits a sidelink synchronization signal (SLSS) in a wireless communication system, the method including: selecting an SLSS ID by means of a terminal which directly receives a signal from Global Navigation Satellite Systems (GNSS) to obtain synchronization; and transmitting the SLSS generated on the basis of the selected SLSS ID, wherein the selected SLSS ID is selected from an SLSS ID set, which is identical to one used when a terminal, which directly receives a synchronization signal from a base station and selects a base station timing as synchronization, transmits the SLSS.

Abstract: The present disclosure describes a method, an apparatus, and a computer-readable medium for use in providing reverse time alignment in a wireless network. For example, the method may include obtaining a first timing value from a serving node and a second timing value from each of one or more non-serving nodes of the UE, computing one or more timing differences between the first timing value and each of one or more second timing values, and reporting the one or more timing differences to the serving node. Additionally, the disclosure describes a method, an apparatus and a computer-readable medium for use in providing time alignment in a coordinated multi-point (CoMP) transmission network by obtaining of a CoMP transmission network timing information from a plurality of user equipments (UEs) and storing the timing information for each of the plurality of UEs for communicating with the first node.

Abstract: A system and method of synchronizing a mesh network comprising a plurality of nodes are provided. The method may include sensing and transmitting, by a first subset of the plurality nodes, temperature values of the first subset nodes; receiving, by at least one back-end unit, from the first subset nodes, the temperature values of the first subset nodes; determining, by the at least one back-end unit, for a second subset of the plurality of nodes including all the first subset nodes, respective ambient-related clock drift values, based on the temperature values of the first subset nodes and an inter-node data; transmitting, by the at least one back-end unit, the respective ambient-related clock drift values to the second subset nodes; and determining, by the second subset nodes, ambient-related time offset values between each respective two nodes of the second subset, based on the respective nodes' ambient-related clock drift values.

Abstract: The present invention is designed to carry out communication adequately in cells (for example, unlicensed bands) where listening is executed prior to transmission. According to one aspect of the present invention, a user terminal has a receiving section that receives common control information, via a downlink control channel, in an LAA SCell (License-Assisted Access Secondary Cell), and a control section that controls a communication process in the LAA SCell based on the common control information.

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may select a coverage enhancement (CE) level based on a coverage limitation. The UE may then receive system information from a base station indicating an index of CE levels and corresponding physical random access channel (PRACH) configurations, and the UE may transmit a random access preamble using the PRACH configuration for the selected CE level. For example, the UE may transmit the preamble based on a frequency offset that corresponds to the selected CE level. In some cases, the UE and base station may also associate groups of preambles with downlink (DL) CE levels. The UE may select a preamble from a group corresponding to a desired DL CE level for a random access response message. The base station may determine the DL CE level based on the group the preamble was selected from and respond accordingly.

Abstract: Disclosed are a method, an apparatus, and a system for transmitting a signal using multiple carriers. In detail, provided are a wireless communication apparatus including a communication module; and a processor, wherein the processor obtains a common back-off counter for a carrier set on which data is to be transmitted, wherein the carrier set includes at least one component carrier, performs back-off of each of the component carriers using the obtained common back-off counter, and simultaneously transmits data through at least one component carrier in which the back-off is completed and a wireless communication method using the same.

Abstract: The disclosure relates to a method and device for time-controlled data transmission in a TSN. A new traffic shaping method is described for time-sensitive data streams. The objective is to offer the same real-time performance and configuration complexity as in the prior art but without the need for time synchronization throughout the entire network. The traffic shaper provides that a data frame that is received by a bridge in a first-time interval is passed by this bridge to the next hop/bridge in the next time interval. Each bridge knows the start time of the time interval that belongs to a particular data stream. Each data frame must contain a so-called “delay value,” thus a delay value which is measured by each bridge using a local clock that measures the delay time spent by the data frame in the queue at the outgoing port.

Abstract: An embodiment method defines a demodulation reference signal (DMRS) pattern for transmitting DMRSs for rank 3 or rank 4 transmissions. The DMRS pattern specifies 12 REs in total per physical resource block (PRB) for carrying DMRSs on three or four antenna ports in antenna ports 7-14 for rank 3 or rank 4 transmissions. DMRS settings for transmitting DMRS according to the DMRS pattern may be specified using a downlink control information table.

Abstract: Some implementations of the disclosure are directed to symbol-timing tracking systems and methods. A symbol-timing tracking system may include: an ADC to generate a digital signal by sampling an analog signal received at a receiver; an interpolator to adjust a sampling rate of the digital signal; a receive filter to apply a receive filtering function to the digital signal to generate a filtered signal; a timing error detector configured to generate a timing error signal from the filtered signal; a high-order loop filter to filter the timing error signal to generate a filtered timing error signal; and a numerically controlled oscillator to control timing data based on the filtered timing error signal and provide the timing data to the interpolator, wherein the interpolator is to correct for timing of the digital signal and adjust the sampling rate of the digital signal based on the timing data.

Abstract: A control node for operating in a network with shared channels includes one or more processors configured to execute program code to determine a rejection strategy for managing contention-based access to a shared channel by one or more transmitters, transmit or trigger transmission of a transmission request rejection in response to a transmission request by a first transmitter of the one or more transmitters according to the rejection strategy.

Abstract: A communication device includes a receiver, a transmitter and a control circuit. The receiver is configured to receive, from an infrastructure equipment of a mobile communications network, downlink signals on a downlink via a wireless access interface of the mobile communications network. The transmitter is configured to transmit, to the infrastructure equipment, uplink signals on an uplink via the wireless access interface. The control circuit is configured to control the receiver to receive the downlink signals and control the transmitter to transmit the uplink signals. The control circuit is further configured to delay a reception period for the receiver to receive the downlink signals after a transmission period in which the transmitter transmits the uplink signals when a duration of the transmission period exceeds a predetermined threshold.

Abstract: A method according to one embodiment includes communicating a wireless advertisement that identifies a clock status of a real-time clock of the access control device, wherein the clock status includes a clock status value indicating that the real-time clock has not been set, establishing a wireless communication connection with a computing device in response to the wireless advertisement, transmitting a session random value to the computing device, receiving a clock update token from the computing device, wherein the clock update token is indicative of an authority of the computing device to update the real-time clock of the access control device, authenticating the clock update token based on at least the session random value, and updating the real-time clock based on a received update time in response to successful authentication of the clock update token.

Abstract: Briefly, embodiments disclosed herein relate to switching between versions of digital content to be displayed, such as to a user, in a real-time searching environment, for example.

Abstract: Improvements may be made for an apparatus performing congestion control considering different technologies, types of radio resources, and priorities of different packets. The apparatus may be a UE. The UE determines a channel busy ratio (CBR). The UE determines one or more channel resource utilization limits based on the CBR, where each channel resource utilization limit of the one or more channel resource utilization limits corresponds to a respective packet priority. The one or more channel resource utilization limits are also a function of a CBR limit. The UE controls transmission of a plurality of packets based on the one or more channel resource utilization limits, and each packet of the plurality of packets has a respective packet priority.

Abstract: Embodiments of the present invention provide a synchronization signal carrying method and an apparatus. The synchronization signal carrying method in the present invention includes: determining, by first user equipment, a priority parameter of a synchronization signal; determining, by the first user equipment according to the priority parameter, a resource for carrying the synchronization signal, where a configuration of the resource indicates the priority parameter; and sending, by the first user equipment, the synchronization signal to second user equipment by using the resource, so that the second user equipment determines a synchronization signal for the second user equipment. The embodiments of the present invention enable a more flexible synchronization signal determining manner in a D2D communications system.

Abstract: Various embodiments provide a method for transceiving a signal by a terminal and a base station in a wireless communication system and a device supporting same.

Abstract: This disclosure relates to using a dedicated reference subframes in a cellular communication system. According to one embodiment, a base station may transmit reference signals in a dedicated synchronization and measurement reference subframe. Neighboring base stations may also transmit reference signals in dedicated reference subframes in a temporally coordinated (synchronized) manner. The reference signals transmitted be each base station may be orthogonal with the reference signals transmitted by each neighboring base station. The reference subframes may be transmitted periodically, and data subframes may be transmitted between reference subframes. Some or all of the data subframes may not include cell-specific reference symbols, as their function may be unnecessary given the use of the dedicated reference subframes.

Abstract: An aspect of the present disclosure includes methods, systems, and computer-readable media for receiving a first timing reference signal and a second timing reference signal at a local device, wherein the second timing reference signal includes an internal timing reference, receiving a timing indication from a remote device, calculating a timing offset from at least one of a propagation delay, the timing indication, or the first timing reference signal, adjusting the internal timing reference based on the timing offset, and transmitting a message based on the internal timing reference.

Abstract: An embodiment method defines a demodulation reference signal (DMRS) pattern for transmitting DMRSs for rank 3 or rank 4 transmissions. The DMRS pattern specifies 12 REs in total per physical resource block (PRB) for carrying DMRSs on three or four antenna ports in antenna ports 7-14 for rank 3 or rank 4 transmissions. DMRS settings for transmitting DMRS according to the DMRS pattern may be specified using a downlink control information table.

Abstract: Example uplink reference signal sending methods and apparatus are described. One example method includes sending signaling to a terminal device by an access network device. The terminal device determines a sequence type of an uplink reference signal based on the signaling. The terminal device determines transmit power of the uplink reference signal based on the sequence type of the uplink reference signal, and sends the uplink reference signal by using the transmit power of the uplink reference signal.

Abstract: A method for random access, a terminal device, and a network device are provided. The method includes that: a terminal device sends an access request message to a network device and indicates access auxiliary information of the terminal device to the network device through the access request message; the terminal device receives an access response message sent by the network device according to the access request message, wherein the access response message includes indication information for indicating rejection of access of the terminal device, and the indication information includes access suggestion information corresponding to the access auxiliary information.

Abstract: A time server of a server time protocol (STP) facility of a coordinated timing network (CTN) receives a primary-reference-time (PRT) update, with the primary-reference-time update having been determined with reference to a time source, which includes a precision-time-protocol (PTP) source. The time server sets a primary reference time correction steering rate for the coordinated timing network based on receiving the primary-reference-time update, and broadcasts to one or more other servers of the coordinated timing network a PRT-correction-steering information block (PCSIB). The PRT-correction-steering information block includes a precision-time-protocol identifier for the time source used in determining the primary-reference-time update, and the primary-reference-time correction steering rate set by the time server.

Abstract: The disclosure provides for receiving a downlink transmission for wireless communications. A user equipment (UE) may receive, on a primary component carrier, an indication that a subframe of a secondary component carrier includes a discovery reference signal. During the subframe, the UE may receive, on the secondary component carrier over an unlicensed spectrum, a transmission including the discovery reference signal. The UE may rate match the transmission based on the indication. The disclosure further provides for discovering timing information during wireless communications. The UE may receive on a primary component carrier, an indication that a set of subframes of a carrier of a neighboring cell includes a discovery reference signal. The UE may determine a subframe to receive the discovery reference signal based on the indication. The UE may receive during the subframe, the discovery reference signal from the neighboring cell in an unlicensed spectrum.

Abstract: Methods and Devices for performing a device-to-device, D2D, operation are disclosed. A first reference timing for each of two or more non-terrestrial synchronization sources is obtained. Further a second reference timing of a terrestrial synchronization source is obtained. One of the non-terrestrial synchronization sources is determined based on a comparison between the first reference timings and the second reference timing, and the D2D operation is performed using the first reference timing of the determined non-terrestrial synchronization source.

Abstract: A technique for transferring data on a radio bearer is described. The split radio bearer includes a first layer entity (570) at a first layer of a protocol stack and at least two second layer entities at a second layer of the protocol stack. The second layer is lower than the first layer in the protocol stack. In a method aspect of the technique, the data is received through each of the at least two second layer entities (582, 584). The data received through the at least two second layer entities (582, 584) is validated. If a result of the validation is indicative of an inconsistency in the data received through the at least two second layer entities (582, 584), a retransmission of the data is selectively triggered through at least one of the second layer entities (582, 584).

Abstract: This specification relates to an apparatus and method for performing random access in a wireless communication system. This specification discloses a mobile station, including a reception unit for receiving TAG configuration information on which at least one serving cell configured in the mobile station is classified as a Timing Alignment Group (TAG) from a base station and a transmission unit for transmitting a random access preamble to the base station on one representative serving cell within the TAG. In accordance with this specification, a procedure of obtaining a TAV for a serving cell in order to secure and maintain uplink timing synchronization becomes clear, the time taken to obtain uplink synchronization for a serving cell may be reduced, and overhead due to excessive random access attempts may be reduced by obtaining a TAV for a plurality of serving cells through one random access procedure.

Abstract: Aspects of the present disclosure provide techniques utilizing shared radio frequency spectrum (SRFS) for certain devices, such as machine type communication(s) (MTC) user equipments (UEs) and evolved or enhanced MTC (eMTC) UEs. An exemplary method, performed, for example, by a base station (BS), includes performing a channel clear assessment (CCA) for at least a portion of the SRFS including one or more narrowband regions, and communicating with at least one MTC UE, after performing the CCA, on at least one of the narrowband regions. A second exemplary method, performed, for example, by a MTC UE, generally includes receiving, from a BS, an assignment of resources in a narrowband region of the SRFS band for the MTC UE to use for communicating with the BS, and communicating with the BS on the narrowband region without performing a CCA for the narrowband region.

Abstract: The present invention relates to the field of wireless communications, and in particular, to an information sending and receiving method, a base station, and a terminal device that are used for uplink timing of a terminal device. In the information sending method, a first base station determines a first time adjustment parameter and a second time adjustment parameter; the first base station sends the first time adjustment parameter and the second time adjustment parameter to a terminal device. According to the solution provided in this application, the base station provides a plurality of time adjustment parameters for the terminal device to perform uplink signal timing, so as to provide flexible and efficient uplink subframe scheduling for the base station, thereby meeting various requirements for uplink timing.

Abstract: There is provided a fast paging procedure in which a master device repeatedly sends the paging message to a slave device using predetermined channel frequencies, wherein a selection of the predetermined channel frequencies is not calculated or predicted from the slave's Bluetooth device address. When the master device receives a slave page response message at one frequency among the predetermined channel frequencies, the master device transmits an FHS packet to the slave device at the same frequency in which the slave page response message was received.

Abstract: Various embodiments provide a method for transceiving a signal by a terminal and a base station in a wireless communication system and a device supporting same.

Abstract: Embodiments of the present invention relate to a communication method and a terminal. The method includes: receiving, by a first terminal, first information on a first channel, where the first information carries a first sequence of at least one second terminal, the first terminal supports a first transmission technology, the second terminal supports a second transmission technology, and the first sequence of the second terminal is used to indicate that the first channel is used by a terminal that supports the second transmission technology; determining, by the first terminal, first indication information based on the first sequence; and sending, by the first terminal, the first indication information on the first channel. According to the communication method provided in the embodiments of the present invention, terminals that support different transmission technologies can better coexist on a plurality of shared channels, and interference between the different transmission technologies can be avoided.

Abstract: In one aspect, a network node configured to arrange a synchronization service for a target network access node receives a service request from the target network access node for a synchronization service to be provided to the target network access node and selects the synchronization source node, responsive to the service request. The network node sends a response towards the target network access node regarding the synchronization service to be provided by the synchronization source node.

Abstract: An embodiment of the present invention relates to a method for transmitting a sidelink signal by a terminal in a wireless communication system, the method comprising the steps of: generating a sequence for transmitting a sidelink signal; mapping the sequence to a plurality of subcarriers around a sidelink direct current (DC) subcarrier; and transmitting a sequence for transmitting the mapped sidelink signal, wherein the location of the sidelink DC subcarrier has been inherited from a location of a DC subcarrier when the terminal transmits an uplink signal to a base station or a location of a DC subcarrier when the terminal receives a downlink signal from the base station. The first terminal is included in an autonomous vehicle.

Abstract: The present disclosure relates to a pre-fifth generation (5G) or 5G communication system to be provided for supporting higher data rates beyond fourth generation (4G) communication system such as long term evolution (LTE). A synchronization signal transmission/reception method for use in a device-to-device (D2D) communication system is provided.

Abstract: A method of receiving remaining minimum system information (RMSI) by a user equipment (UE) in a wireless communication system is disclosed. The method includes receiving a synchronization signal/physical broadcast channel (SS/PBCH) block in a specific band, obtaining a size of a synchronization raster for the specific band based on the SS/PBCH block, and receiving the RMSI based on the size of the synchronization raster.

Abstract: The application discloses a communication method, a terminal device and a network device, which are suitable for determining a waveform to be used in an uplink transmission of the terminal device in various scenarios. The method includes that: a terminal device transmits first indication information to a network device, where the first indication information is used to indicate a location area in which the terminal device is currently located; the terminal device receives second indication information transmitted by the network device, where the second indication information is used to indicate a first target waveform, the first target waveform being determined by the network device from at least two optional uplink waveforms according to the location area in which the terminal device is currently located; and the terminal device performs an uplink transmission using the first target waveform.