Transmission timing adjustment in radio systems

摘要

A method of adjusting the transmission time of a signal in a radio link, the method being performed by a transmitter configured to transmit the signal over the radio link to a receiver and comprising the steps of ascertaining an accuracy that the receiver assumes for the transmitter's clock, calculating an assumed drift of the transmitter's clock based on the assumed accuracy of that clock and the time since a previous correlation between the transmitter's clock and the receiver's clock; and transmitting the signal at a time dependent on the assumed drift.

主权项

1. A method of adjusting a transmission time of a signal in a radio link, the method being performed by a transmitter to transmit the signal over the radio link to a receiver and the method comprising the steps of: ascertaining, at the transmitter, an accuracy that the receiver assumes for the transmitter's clock, calculating, at the transmitter, an assumed drift of the transmitter's clock based at least on the assumed accuracy that the receiver will have made of the transmitter's clock and a time since a previous correlation between the transmitter's clock and the receiver's clock; and transmitting, by the transmitter, the signal at a time dependent on the assumed drift such that the transmission time is closer to the receiver's activation time than a predetermined transmission time for the signal, wherein the transmitter and the receiver operate according to a Bluetooth Low Energy (LE) system.