Abstract: A method for indoor localization using nomadic access points, comprising the following steps: a target object transmits a modulated signal over wireless channels to nearby access points, wherein the access points include both static access points and nomadic access points; the access points measure channel state information via the signal from the target object, after that, the static access points export the channel state information to a server, the nomadic wireless access point report the channel state information along with their coordinates of the current sites to the server; and based on the channel state information, the server determines the target object's relative proximity to two arbitrary access points, then based on the result of the relative proximity determination and the coordinates, the server estimates a feasible region for the target object with a space partition-based algorithm.

Abstract: Present invention provides a method for inferring the type of a road segment, comprising the steps of: collecting historical driving trajectory data of a plurality of vehicles for a target road segment, performing a statistic on the historical driving trajectory data, and obtaining statistical features of the target road segment; extracting topological features of the target road segment from topological structure data of the road network; merging the statistical features with the topological features of the target road segment, and obtaining an arrogated feature vector of the target road segment; building a logistic regression model according to the arrogated feature vector, and obtaining a first inferred type of the target road segment. The present embodiment considers both the driving trajectory data of a plurality of vehicles and the topological structure data of the road network, the accuracy of the present invention is high, and the inferred result is accurate.

Abstract: A method for indoor localization using nomadic access points, comprising the following steps: a target object transmits a modulated signal over wireless channels to nearby access points, wherein the access points include both static access points and nomadic access points; the access points measure channel state information via the signal from the target object, after that, the static access points export the channel state information to a server, the nomadic wireless access point report the channel state information along with their coordinates of the current sites to the server; and based on the channel state information, the server determines the target object's relative proximity to two arbitrary access points, then based on the result of the relative proximity determination and the coordinates, the server estimates a feasible region for the target object with a space partition-based algorithm.