An illustrated embodiment disclosed herein is a method including receiving, by an endpoint, a plurality of swept syncs, each swept sync being on a different channel, measuring, by the endpoint, a received signal power for each of the plurality of swept syncs, determining, by the endpoint, a first swept sync based on the received signal power, interpolating, from the first swept sync, a first channel for sending an uplink (UL) physical data unit (PDU), sending, by the endpoint, the UL PDU on the first channel, and receiving, by the endpoint, a downlink (DL) PDU on a second channel, wherein the second channel is based on the first channel to leverage channel reciprocity.

Certain aspects of the present disclosure provide techniques for transceiver timing controls in a synchronized network. A method that may be performed by a user equipment (UE) or a base station (BS) includes determining a first instance of time corresponding to a beginning of a wireless transmission of data by a transceiver, determining a second instance of time corresponding to a beginning of a process configured to load a plurality of buffers with a portion of the data, loading of the plurality of buffers with the data, and transmitting, the data at the first instance of time.

The disclosed systems, structures, and methods are directed to a wireless receiver. The configurations presented herein employ a signal encoder configured to encode a plurality of received analog signals into a single encoded analog composite signal, in accordance with a variable leading bit orthogonal coding scheme, an analog-to-digital converter (ADC) configured to convert the single encoded analog composite signal into a single encoded digital composite signal containing constituent digital signals, a synchronization module configured to provide the variable leading bit orthogonal coding scheme to the signal encoder, and a signal decoder configured to decode the single encoded digital composite signal in accordance with the variable leading bit orthogonal coding scheme, to output a plurality of digital signals containing the desired information content of the received plurality of analog signals.

Systems and methods for aligning timing of an inroute transmission of a terminal with a gateway are disclosed. A system may include a processor and a memory storing instructions, which when executed by the processor, may cause the processor to perform a random estimation of location pertaining to a time-division multiple access (TDMA) frame boundary of a gateway. Based on an asynchronous scrambled coded multiple access (ASCMA) technique, the system may transmit ASCMA group burst packets including precise timing feedback request for the gateway. The system may receive a feedback from the gateway, in response to the precise timing feedback request. The processor may determine an adjustment for aligning timing of an inroute transmission of the terminal with respect to the TDMA frame boundary of the gateway. The system may apply the adjustment to synchronize the timing of the inroute transmission of the terminal with the gateway.

An embodiment method includes determining, by first user equipment UE, first synchronization information, where the first synchronization information is used to indicate a priority of the first UE used as a synchronization source; and sending, by the first UE, the first synchronization information, so that second UE selects a synchronization source of the second UE according to the received first synchronization information.

Various arrangements are presented for using an estimated timing advance for user equipment communications. A location of an instance of user equipment may be determined. An estimated distance between the user equipment and a communication satellite may be determined using the determined location of the user equipment and an estimated satellite location. An estimated timing offset using the calculated estimated distance may be determined. An uplink data frame may be transmitted by the user equipment to the satellite such that a timing of transmission of the uplink data frame is based on the calculated estimated timing offset.

A computer system is provided that includes devices configured to acquire input data. The system further includes a remote node (RN) configured to receive a first packet from a control node (CN). The first packet includes a packet header including a master timestamp, first control data and a CRC. The RN is also configured to verify integrity of the first control data based on the received CRC, generate and transmit to the CN a second packet. The second packet includes a packet header which includes a remote timestamp. The system also includes a CN connected with the RN via high-speed serial interfaces. The CN is configured to receive the second packet, determine status of the first packet based on the control data included in the second packet and configured to retransmit the first packet or generate and transmit a third packet based on the determined status of the first packet.

Disclosed is a communication method performed between a satellite and a ground station and apparatuses performing the communication method. The communication method includes transmitting a plurality of frames based on a beam allocation time schedule (BATS) between a satellite and a ground station, and synchronizing the BATS based on a reception time and a detection time of one or more frames among the plurality of frames to be received through a beam open window (BOW) allocated to the ground station.

Devices, methods, and systems for uplink synchronization in time division multiple access (TDMA) satellite network. In one embodiment, an earth-based satellite terminal is configured to communicate with a satellite hub through a satellite using the TDMA communication protocol. The earth-based satellite terminal is configured to determine its own location, a location of the satellite, estimate a distance between the location of the terminal and the location of the satellite, determine a Coarse Timing Advance based on the distance that is estimated, and transmit data to the satellite based on the Coarse Timing Advance and the TDMA communication protocol. The Coarse Timing Advance may allow uplink TDMA communication without a preamble transmission on a random access channel, the preamble transmission being required in many conventional systems.

A method for sending a synchronization signal in a relay system, and an apparatusthe method including receiving, by a relay node, synchronization signal information sent by a parent node through an air interface, where the synchronization signal information comprises at least one of a subcarrier spacing of a synchronization signal, information about an operating frequency band of the relay node, information about a physical broadcast channel of the relay node, a synchronization signal periodicity, or indication information of a synchronization signal obtaining manner, and sending, by the relay node, the synchronization signal based on the synchronization signal information.