Patent ID: 6681099
Filing Date: 2004-01-20
Classification: G01S,H04W

Abstract:
A method for calculating round trip propagation delay for a user equipment in a wireless network, comprising the steps of:(a) measuring a round trip time comprising a time from a beginning of a downlink transmission signal from a node of the wireless network to the user equipment to the reception of an uplink transmission signal from the user equipment to the node in response to the downlink transmission signal; (b) measuring, by the user equipment, a user equipment Rx-Tx timing difference comprising a time difference between reception of the downlink transmission signal at the user equipment and transmission of the uplink transmission signal from the user equipment during said step (a); and (c) determining the round trip propagation delay between the user equipment and the node by subtracting the user equipment Rx-Tx timing difference determined in said step (b) from the round trip time measured in said step (a).