A system and method are disclosed for synchronizing timing for a terminal in a satellite communication system. Upon detecting a service interruption, first timing markers are extrapolated from timing information received prior to the service interruption. Second timing markers are also extrapolated from timing information received subsequent to the service interruption. Timing for the terminal is then synchronized with the gateway based on a timing difference between the first timing markers and the second timing markers.

Disclosed is an improved implementation of a flood fill mesh network that utilizes probability forwarding for rebroadcasting network messages. The forwarding probability may be determined based on analyzing a network topology map constructed by each network node relative to its neighbor nodes communicating on the network and derived from state information contained in synchronization frames broadcasted by the network nodes on the network. The forwarding probability may comprise a statistical probability that a message frame received by a network node will be forwarded to the intended destination network node by one or more of the network node's neighbor network nodes.

The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The disclosure is A first apparatus for estimating a delay time in a synchronization system is provided. The first apparatus includes a detector configured to detect a request signal generated by a second apparatus, and a generator configured to generate a response signal corresponding to the request signal and output the response signal. The request signal is received through a cable from the second apparatus and the response signal is transmitted to the second apparatus through the cable.

Methods, systems, and devices for wireless communication are described. A first device may receive a grant that schedules a wireless communication between the first device and a second device. The grant may indicate a demodulation reference signal (DMRS) configuration for a set of symbols associated with the wireless communication. The first device may receive control signaling that indicates a phase discontinuity associated with a first subset of symbols of the set of symbols. The first device may receive the wireless communication during a second subset of symbols of the set of symbols based on the DMRS configuration and the indication of the phase discontinuity. The first device may perform channel estimation based on receiving the wireless communication during the second subset of symbols.

A communication device assists location services by receiving a virtual boundary condition from the operating system. The virtual boundary condition is received by a wireless communication chipset (e.g., a Wi-Fi chipset) of the communication device. The Wi-Fi chipset measures one or more distances between the communication device and one or more wireless communication devices (e.g., Wi-Fi access points) using a wireless communication distance measuring protocol (e.g., Wi-Fi Fine timing measurement or FTM), determines that the virtual boundary condition has been satisfied by the one or more measured distances, and notifies the operating system that the virtual boundary condition has been satisfied by the one or more measured distances.

A system for synchronizing communications in a radio ranging process involves transmitting calibration signals according to a predetermined schedule of nominal transmission times. Timing offsets are determined. A start time is determined for a transmission of a ranging signal. The start time is earlier than a nominal start time of the ranging signal by at least the largest timing offset. Another system for synchronization involves a radio device transmitting a calibration signal to a second radio device and receiving a calibration response signal from the second radio device. A time-of-flight value is determined in dependence on a time of departure of the calibration signal and a time of arrival of the calibration response signal. A ranging signal is transmitted at a time determined in dependence on the determined time-of-flight value. A ranging response signal is received and processed to determine a range value.

Disclosed is an improved implementation of a flood fill mesh radio network that utilizes probability forwarding for rebroadcasting network messages. The forwarding probability may be determined based on analyzing a neighbor topology map constructed by each network node relative to its neighbor nodes on the network and derived from state information supplied in synchronization frames. The forwarding probability may comprise a statistical probability that a message frame received by a network node will be forwarded to the intended destination network node by one or more of the network node's neighbor network nodes. The forwarding probability may also be based on constructing a heat map of hot nodes that are identified as those originating nodes in originating node/forwarding node pairs that are the first to forward message frames along paths in the network relative to duplicate message frames received from different originating/forwarding node pairs along different paths.

An apparatus, method and computer program for aiding identification of a target of a response to a request. The apparatus comprises means for generating the request. Means for determining a timing advance to be applied to a predetermined time of transmission of the request in order for the request to reach a destination at the predetermined time. Means for transmitting the request signal towards the to destination. Means for receiving a response, the response comprising a timing advance indication, the timing advance indication indicating a difference in time between receipt of the request signal and the predetermined time. Means for determining from the timing advance indication and the determined timing advance whether the received response is a response to the request.

A system and method involve using sferic signals to synchronize clocks and/or determine relative receiver positions within a communications network. A sferic signal is detected, encoded, and then identified. A time-difference-of-arrival (TDOA) for the sferic signal is then calculated. A clock error estimate is determined from the TDOA. The clock error estimate is then used to synchronize clocks and/or determine relative receiver positions.

A method and apparatus may include receiving, by a radio access network (RAN), at least one burst arrival time (BAT) parameter from at least one session management function (SMF). The method may further include determining, by the RAN, if at least one actual BAT is offset from the at least one received BAT parameter by at least one threshold. The method may further include setting, by the RAN, at least one BAT correction parameter based upon at least one offset time. The method may further include calculating, by the RAN, at least one new BAT parameter according to the one BAT correction parameter. The method may further include adjusting, by the RAN, at least one burst schedule based upon one or more of the at least one BAT correction parameter or the at least one new BAT parameter.