主权项 |
1. A method of sharing data between a first device associated with a first subscriber of a first cellular carrier and a second device associated with a second subscriber of a second cellular carrier, the data including position data indicating a location of the first device, the method comprising:
maintaining a subscriber database listing subscribers, including the first subscriber of the first cellular carrier and the second subscriber of the second cellular carrier; associating, in the subscriber database, a status for each of the subscribers; associating, in the subscriber database, the first subscriber with a subset of the subscribers, the subset including the second subscriber; communicating with the first device to authenticate the first device; sending the authenticated first device the statuses for the subset of the subscribers, including the second subscriber; receiving, from the first device, an instruction to convey to the second subscriber position data indicating the location of the first device; and sending, responsive to the instruction, the position data indicating the location of the first device to the second device. |