Abstract: A method for determining a location of a wireless tag, the method may include generating or receiving, by a tagged mobile device, an estimated location of another tag that communicates with the tagged mobile device; receiving or generating, by the tagged mobile device, multiple distance measurements that are obtained during different points of time; wherein the multiple distance measurements are obtained during a rotational movement of the tagged mobile device and represent distances between the tagged mobile device and the other tag; finding a certain angle of rotation of the mobile device that corresponds to a minimal distance measurement of the multiple distance measurements; and amending the estimated location of the other tag based upon the certain angle of rotation.

Abstract: A method for managing a sphere of wireless tags, the method comprises programming, by a wireless reader, a group of wireless tags to belong to the sphere of wireless tags; sending by the wireless reader sphere beacons aimed to the wireless tags of the sphere; detecting a loss of a wireless tag of the sphere if the wireless tag did not respond to a predetermined number of sphere beacons; and responding to the detecting of the loss of the wireless tag.

Abstract: A method for determining a location of a group of wireless tags, the method may include receiving first information indicative of distances between each wireless tag of the group and between at least three other wireless tags of the group; tracking a first movement of a certain tag of the group of wireless tag in relation to other wireless tags of the group to provide first movement information; receiving, after the performing of the first movement, second information indicative of distances between each wireless tag of the group and between at least three other wireless tags of the group; and determining locations of the wireless tags of the group in response to the first information, second information and the first movement information.