Patent ID: 6954650

Claim:
A method for determining mobility characteristics of a mobile terminal, comprising: measuring a first angular direction of travel of a mobile terminal at a first instant; measuring a second an angular direction of travel of the mobile terminal at a second instant; and subtracting the first angular direction from the second angular direction to determine a directivity of the mobile terminal during an interval of time between the first instant and the second instant, wherein the first angular direction is θ n , the second angular direction is θ n+1 , the first instant is t, the second instant is t+T, the interval of time is T, and a directivity element is β n,n+1 =θ n+1 −θ n ; and wherein a directivity vector stores N directivity elements of the mobile terminal as β (T,N)=[ . . . β n−1,n β n,n+1 β n+1,n+2 . . . ], where β i,i+1 =(θ i+1 −θ i ) per interval of time T.