Patent ID: 8180366
Filing Date: 2012-05-15
Classification: G08B,H04L,H04W

Abstract:
1. A method of disseminating messages to a movable unit in a wireless mobile network, comprising: adding a current spatial position of the movable unit to a trajectory history of the movable unit; receiving at a computer system coupled to a communications interface, a generally-broadcast message relating to a target geographical region; computing, using the computer system, a potential trajectory of the movable unit over a pre-determined time period based on at least one of: (i) the current spatial position, (ii) a travel direction of the movable unit, and (iii) the trajectory history of the movable unit, wherein the computing comprises: identifying, from the trajectory history, paths that cross into the target geographical region, tracing the identified paths away from the target geographical region for the pre-determined time period to establish a set of candidate path segments, computing the travel direction for the movable unit based on the trajectory history, and selecting a candidate path segment from among the set of candidate path segments to be the potential trajectory, the selecting based on at least one of: (i) the current spatial position of the movable unit matching the candidate path segments, and (ii) the computed travel direction of the movable unit pointing towards the target geographical region; and disseminating using the communications interface, the generally-broadcast message in response to the potential trajectory crossing into the target geographical region.