公开(公告)号：US10148355B1

公开(公告)日：2018-12-04

申请号：US15844752

申请日：2017-12-18

Applicant: Cisco Technology, Inc.

Inventor： Charles Calvin Byers ,  Chris Pirics

IPC: H04B10/116 ,  B61B3/02 ,  H04J14/08

Abstract: A mobile network device moves along a track rail structure of a ceiling-mounted track enclosure. The ceiling-mounted track enclosure further comprises a beam transmission cavity for accommodating a collimated light beam having a prescribed cross-sectional area and having been transmitted into the beam transmission cavity by a free space optical transmitter, without obstruction of the collimated light beam by the mobile network device along the track rail structure. The mobile network device receives, at a selected detection area within the cross-sectional area, a modulated light signal transmitted within the collimated light beam. The selected detection area is substantially smaller than the prescribed cross-sectional area and allocated exclusively to the mobile network device. The mobile network device can move toward an identifiable destination position of the track rail structure by a determined arrival time in response to the mobile network device detecting a movement instruction in the modulated light signal.