One embodiment of the present invention sets forth a technique for performing time synchronization within a network. The technique includes receiving, from a first node in the network and at a first receive time, a first periodic beacon that includes a first network time associated with the first node. The technique also includes determining a second receive time at which a second periodic beacon from the first node is to be received based on the first network time and the first receive time. The technique further includes calculating a first listening window for the second periodic beacon based on the second receive time, a first jitter uncertainty, and a first drift uncertainty, and listening for the second periodic beacon during the first listening window.

A system, method and apparatus for configuring a node in a sensor network. A sensor service can enable sensor applications to customize the collection and processing of sensor data from a monitoring location. In one embodiment, sensor applications can customize the operation of nodes in the sensor network via a sensor data control system.

There is provided a multi-hop relay system including a transmission node and a relay node, communicating using a flooding method. The transmission node is configured to transmit a synchronization packet used to synchronize a plurality of relay nodes. The relay node is configured to perform first reception in a first period at every first cycle corresponding to the predetermined cycle, and second reception in a second period not less than a length of the predetermined period at every second cycle longer than the first cycle. The relay node performs the second reception if the synchronization packet cannot be received by the first reception, and if the synchronization packet is received by the second reception, stops the second reception and performs the first reception if the predetermined condition is determined to be satisfied, and if not, executes synchronization recovery processing.

A method, system and apparatus are disclosed. In one or more embodiments, a network node for a wireless communication system is provided. The network node includes processing circuitry configured to: send a wireless system clock and a network clock different from the wireless system clock where the network clock is adjustable based at least on the wireless system clock; determine one of a plurality of Propagation Delay (PD) compensation schemes for a first wireless device to implement based at least in part on at least one characteristic associated with the first wireless device; and indicate the one of the plurality of PD compensation schemes to the first wireless device for adjustment of the wireless system clock.

A system and method for receiving timing information are disclosed herein. In one embodiment, a method performed by a first node includes receiving, by a first node from a second node, one of (1) first information and second information, or (2) third information. The first information includes configuration information of at least one of indication information, timing mode, or time resource type. The method includes determining, by the first node, time difference information according to the one of (1) the first information and the second information, or (2) the third information.

The present disclosure relates to a method and apparatus for transmitting and receiving a sidelink synchronization signal in a wireless communication system. A method of transmitting, by a first user equipment (UE), a sidelink synchronization signal to a second UE in a wireless communication system according to an example of the present disclosure may include determining values of N.sub.ID.sup.(1) and N.sub.ID.sup.(2) corresponding to a sidelink identifier (SLID) value based on a number of types of a physical layer sidelink synchronization identity set and a number of sequences included in each type of the physical layer sidelink synchronization identity set; generating a sidelink primary synchronization signal (PSS) sequence and a sidelink secondary synchronization signal (SSS) sequence based on a first primitive polynomial, a second primitive polynomial, and a cyclic shift (CS) value; and mapping, on physical resources, and thereby transmitting the sidelink PSS sequence and the sidelink SSS sequence.

Systems, methods, and instrumentalities are disclosed to manage interference caused by D2D communications. A wireless transmit receive unit (WTRU) may include a processor. The processor may be configured to perform one or more of the following. The processor may determine to send information using a device-to-device transmission via a resource pool from a plurality of resource pools. Each resource pool may be associated with a range of reference signal receive power (RSRP) values. The processor may determine a RSRP measurement of a cell associated with the WTRU. The processor may select a resource pool from the plurality of resource pools based on the RSRP measurement of the cell. The RSRP measurement of the cell may be within the range of RSRP values associated with the selected resource pool. The processor may send the information using the selected resource pool.

Disclosed is an electronic device. In addition, it is possible to implement various embodiment understood through the present disclosure. The electronic device transmits a first signal in a first frequency band including at least one of a synchronization beacon frame, a service discovery frame, or an action frame based on an NAN protocol at a first interval for a series of first durations, and transmits a second signal in a second frequency band including at least one of the synchronization beacon frame, the service discovery frame, or the action frame based on the NAN protocol at a second interval for a series of second durations.

A method of transmitting a synchronization signal, a terminal, an apparatus for transmitting a synchronization signal, and a storage medium are provided. The method includes: generating a sidelink-primary synchronization signal sequence according to a formula d.sub.PSS(n)=1−2x(m) or d.sub.PSS(n)=d.sub.u(n), and generating a sidelink-primary synchronization signal according to the sidelink-primary synchronization signal sequence; transmitting the sidelink-primary synchronization signal; or transmitting the sidelink-primary synchronization signal on a frequency resource different from a frequency resource occupied by an air-interface downlink-primary synchronization signal.

A user apparatus, for use in a radio communication system including a base station forming a cell, configured to receive a discovery signal of device-to-device communication, including: an information reception unit configured to receive, from a base station of a residing cell, a resource range in which a discovery signal can be transmitted in a neighbor cell; and a discovery signal reception unit configured to receive a discovery signal at a time position that is synchronized with the neighbor cell in response to receiving a synchronization signal that is synchronized with the neighbor cell within the resource range received by the information reception unit.