Patent ID: 9110151
Filing Date: 2015-08-18
Classification: G01S,H04W

Abstract:
1. A method for improving localization and mobility control of persons or things applicable to a mobile radio terminal associated with a telephone network, having a plurality of base radio stations, the method comprising the following steps: a first step in which the mobile radio terminal receives first service signals associated with each of the base radio stations within radio visibility; a second step in which, by a processing means, the mobile radio terminal detects relative temporal delays with which the first service signals of each of the base radio stations are respectively received at the mobile radio terminal, the temporal delays being calculated with respect to a predetermined time reference, and via a Global Navigation Satellite System (GNSS) associated with the mobile radio terminal, an absolute geographical position occupied by the mobile radio terminal is supplied to the mobile radio terminal, wherein in said second step, by said processing means, the mobile radio terminal calculates the absolute geographical position of each of said base radio stations, from which the mobile radio terminal has received the first service signals, according to said relative temporal delays, and wherein said relative temporal delays are correlated with the absolute geographical position of the mobile radio terminal as supplied by the Global Navigation Satellite System (GNSS); a third step in which, by means of memorization means of the mobile radio terminal, the absolute geographical positions of each of the base radio stations detected in said second step are memorized; and a fourth step in which the mobile radio terminal, by means of said processing means, calculates a new absolute geographical position both according to the absolute geographical position of each of said base radio stations, memorized by said memorization means, and also according to the relative temporal delays with which the service signals of each of the base radio stations are received by the mobile radio terminal with respect to the time reference of the mobile radio terminal, when the Global Navigation Satellite System (GNSS) is not available for the mobile radio terminal.