Patent ID: 7142977
Filing Date: 2006-11-28
Classification: G08G,H04W

Abstract:
1. Method for collecting traffic data with the aid of a mobile station network and terminal equipment in vehicles to be observed, the method comprising: defining areas in the mobile station network, wherein the terminal equipment communicates with the network using one or more predetermined messages, determining a first time by a first clock with a subscriber identity stored based on a message between the network and the terminal equipment and relating to a first area, determining a second time by a second clock with a subscriber identity stored based on a message between the network and the same terminal equipment and relating to a second area, and using the first time and the second time to obtain traffic data about the vehicle moving the terminal equipment by selecting clock pairs based on the subscriber identity/subscriber identities, calculating differences of the selected time by the clock pairs, the calculated differences are collected to form a statistic distribution, and a characteristic magnitude is calculated for the statistic distribution.