A first relay station capable of performing, together with a second relay station, a non-replay relay for a first radio signal transmitted from a transmitting station for a receiving station having one antenna includes an antenna, a radio and a controller. The radio includes a receiver that converts the first radio signal into a baseband signal, an FIR filter that adds a delay to the baseband signal, and a transmitter that converts the signal output from the FIR filter into a second radio signal transmitted from the antenna to the receiving station. The controller ensures that the second radio signals transmitted from the respective antennas of the first and second relay stations have different delays, and that the FIR filter The delay is set in the FIR filter.

Disclosed according to the present invention is a method for reporting a reference signal timing difference (RSTD) value by a terminal, in a wireless communication system. Specifically, the method may comprise: transmitting a random access preamble related to a synchronization signal/physical broadcast channel block (SS/PBCH block) received from a particular cell among multiple cells; requesting a radio resource control (RRC) connection to the particular cell on the basis of a random access response (RAR) received from the particular cell, to make establishment of the RRC connection to the particular cell; receiving, from a location server, a cell group identifier for a cell group including the multiple cells and independent cell information for each of the multiple cells; detecting second PRS sequences transmitted from the respective multiple cells on the basis of a first PRS sequence related to the cell group identifier; and reporting, to the location server, at least one piece of reference signal timing difference (RSTD) information acquired on the basis of the second PRS sequences and the independent cell information.

Monitoring and mass notification systems, such as fire alarm systems, for use in occupied structures, and more particularly to wireless monitoring and mass notification systems include wireless base units that can be modular in design. This allows horns, mini horns, strobes, and audio messaging modules (e.g., speakers) to be physically plugged into the wireless base unit creating a unit with the appearance of a single physical unit. Preferably standardized plugs are used. In some cases, visual and audio modules (i.e., notification devices) have their own battery pack or external power interface. Each wireless base unit can optionally function as a repeater if it has dual transceivers (master transceiver and slave transceiver).

A method of supporting latency monitoring in a network transporting traffic to and from a wireless base station. The method comprises, at a first node of the transport network determining (1401) a first timestamp representing a time at which a data element is received at the first node and adding (1402) information representative of the first timestamp to a communication signal which carries data for the wireless base station, the data including the data element. The method also comprises sending (1403) an indication of an association between the information representative of the first timestamp and the data element that the information representative of the first timestamp relates to. A method performed at a second node as well as apparatus for use at the first node and apparatus for use at the second node are also disclosed.

A system and methods are disclosed for reducing Rx/Tx timing errors in a wireless network for latency of positioning measurements. Additionally, a system and methods are disclosed for increasing positioning accuracy by mitigating NLOS errors and/or by performing two-stage beam sweeping for DL-AoD. Further, a system and methods are disclosed for performing M-sample positioning measurements to improve latency reporting in connection with positioning reporting.

Prior art includes complex clock synchronization in 5G and 6G based on precision time measurements and multiple message exchanges. Disclosed is a simpler synchronization procedure suitable for reduced-capability receivers as well as high-performance users. The base station can transmit a brief signal on a specific subcarrier, surrounded fore and aft by silent periods, and the receiver can measure the signals in the silent periods to detect intrusion of the signal into one or the other silent periods, thereby indicating a timing offset. Alternatively, the base station can transmit a brief signal spanning an interface between subsequent symbol-times, and the receiver can measure the energy received in the two symbol-times, thereby detecting an offset. In either case, and other versions disclosed, the receiver can calculate the size and direction of the clock offset by amplitude measurements, and apply a correction without further communications between the user device and the base station.

A wireless communication system is provided for reducing the probability that latency before data transmission increases when a mobile station that is actually in sync is judged to be out of sync. A base station causes the timing calculation part to calculate the timing advance (TA) of a transmit timing from the m.sup.th mobile station; causes the timer adaptive control part to obtain the traveling speed or the time variation in TA of the m.sup.th mobile station and, adaptively determines and outputs as the timer update information the length of the m.sup.th first timer within an M number in total of synchronization timers and the length of the second timer of the m.sup.th mobile station and update the length of the m.sup.th first timer; and transmits from the downlink transmission part a downlink signal which contains timer update information.

A wireless fire alarm notification system uses wireless repeater devices to annunciate an alarm to slave devices from the control panel. A notification device provides a local synchronization signal via wire to a secondary notification device. A method enables the activation or deactivation of child device without the child device having to query their parent repeater. A circuit to test the integrity of an active battery charger, a battery, and an isolation circuit is also shown. A method for qualifying that an RF signal meets a specified minimum acceptable level is described. A method for wirelessly sending events to avoid RF link overload is provided. A programming checksum method confirms that an annunciator has latest programming information. A method to automatically process messages from new devices without having to hardcode repeaters to support these new devices is also described.

A method of synchronizing the clocks of a master device and at least a first slave device which are connected on a wireless network. The method includes sending a scan command from the master device to at least the first slave device, setting the master device to a broadcast mode and broadcasting data, the broadcast data comprising a first time stamp; scanning the broadcasting data at at least the first slave device and resetting the clock of the first slave device using the first time stamp. In particular, but not exclusively, the present disclosure relates to synchronizing the clocks of two devices which are connected on a Bluetooth Low Energy (BLE) wireless network.

In a particular aspect, an apparatus includes first communication circuitry configured to perform first fine timing measurement (FTM) operations with respect to a device to generate first measurement data. The first FTM operation correspond to a first frequency band. The apparatus includes second communication circuitry configured to perform second FTM operations with respect to the device to generate second measurement data. The second FTM operations correspond to a second frequency band that is different than the first frequency band. The apparatus also includes a processor configured to compare the first measurement data and the second measurement data.