Mobile network device movable along free space optical ceiling-mounted track enclosure for ceiling as a service

Patent metadata

Field	Value
Publication number	US-10148355-B1
Application number	US-201715844752-A
Country	US
Kind code	B1
Filing date	Dec 18, 2017
Priority date	Dec 18, 2017
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

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.

First claim

What is claimed is:

1. A method comprising:
positioning, within a beam transmission cavity of a ceiling-mounted track enclosure, a free space optical transmitter for transmission of a collimated light beam having a prescribed cross-sectional area, the beam transmission cavity constructed and arranged for accommodating the collimated light beam, the ceiling-mounted track enclosure further comprising a track rail structure constructed and arranged for supporting movement of a mobile network device along the track rail structure without obstruction of the collimated light beam;
causing the free space optical transmitter to transmit, within the collimated light beam, a modulated light signal; and
causing the mobile network device to receive the modulated light signal at a selected detection area within the cross-sectional area, the selected detection area allocated exclusively to the mobile network device and the selected detection area substantially smaller than the prescribed cross-sectional area, the modulated light signal including control data for controlling movement of the mobile network device toward an identifiable destination position of the track rail structure by a determined arrival time.

2. The method of claim 1 , wherein the modulated light signal further includes a sensor position instruction for controlling movement of an optical sensor, by the mobile network device, to the selected detection area, the optical sensor having an area substantially corresponding to the selected detection area.

3. The method of claim 1 , wherein the free space optical transmitter transmits the collimated light beam into a first end of the beam transmission cavity, the method further comprising receiving, by an optical receiver at a second end of the beam transmission cavity, a second collimated light beam transmitted by the mobile network device at the selected detection area and carrying second data originated by the mobile network device.

4. The method of claim 1 , further comprising determining the determined arrival time and the identifiable destination position based on determining service requirements of a ceiling service area serviced by the identifiable destination position, relative to an identified allocation of a controllable device coupled to the mobile network device via a wired data connection and configured for one of sending or receiving data via the mobile network device and the beam transmission cavity, and relative to other available mobile network devices supporting respective controllable devices.

5. The method of claim 1 , further comprising:
allocating, for each of a plurality of the mobile network devices on the ceiling-mounted track enclosure and having respective selected detection areas, a corresponding time interval from a time division multiplexing of the modulated light signal, each time interval allocated based on a corresponding determined broadband data requirement for a corresponding controllable device coupled to the mobile network device via a corresponding wired data connection; and
transmitting, to each mobile network device, a corresponding data transmission on the modulated light beam, at a data rate of at least ten gigabits per second (10 Gb/s), for supply of data according to the corresponding determined broadband data requirement.

6. The method of claim 5 , further comprising:
detecting performance metrics associated with one or more of the controllable devices relative to determined service requirements along the ceiling-mounted track enclosure, the performance metrics including any one or more of device service performance of a corresponding controllable device relative to a ceiling service area serviced by the identifiable destination position, or optical link quality between the free space optical transmitter and one or more of the mobile network devices;
adjusting any one or more of the time interval, the selected detection area, or the identifiable destination position for one or more of the mobile network devices, or one or more transmission parameters of the free space optical transmitter, for optimization of one or more of the controllable devices executing the determined service requirements, based on the performance metrics.

7. A system comprising:
a ceiling-mounted track enclosure comprising a beam transmission cavity and a track rail structure, the beam transmission cavity constructed and arranged for accommodating a collimated light beam transmitted at a first end of the beam transmission cavity and having a prescribed cross-sectional area, the track rail structure constructed and arranged for supporting movement of a mobile network device along the track rail structure without obstruction of the collimated light beam;
a free space optical transmitter configured for transmission of the collimated light beam into the first end of the beam transmission cavity, the collimated light beam comprising a modulated light signal including control data; and
a controller circuit configured for generating the control data, the controller circuit configured for causing the mobile network device to receive the modulated light signal at a selected detection area within the cross-sectional area, the selected detection area allocated exclusively to the mobile network device and the selected detection area substantially smaller than the prescribed cross-sectional area, the control data controlling movement of the mobile network device toward an identifiable destination position of the track rail structure by a determined arrival time.

8. The system of claim 7 , wherein the controller circuit is configured for adding to the modulated light signal a sensor position instruction for controlling movement of an optical sensor, by the mobile network device, to the selected detection area, the optical sensor having an area substantially corresponding to the selected detection area.

9. The system of claim 7 , further comprising an optical receiver configured for receiving, at a second end of the beam transmission cavity, a second collimated beam transmitted by the mobile network device at the selected detection area and carrying second data originated by the mobile network device.

10. The system of claim 7 , wherein the controller circuit is configured for determining the determined arrival time and the identifiable destination position based on determining service requirements of a ceiling service area serviced by the identifiable destination position, relative to an identified allocation of a controllable device coupled to the mobile network device via a wired data connection and configured for one of sending or receiving data via the mobile network device and the beam transmission cavity, and relative to other available mobile network devices supporting respective controllable devices.

11. The system of claim 7 , wherein:
the controller circuit is configured for allocating, for each of a plurality of the mobile network devices on the ceiling-mounted track enclosure and having respective selected detection areas, a corresponding time interval from a time division multiplexing of the modulated light signal, each time interval allocated based on a corresponding determined broadband data requirement for a corresponding controllable device coupled to the mobile network device via a corresponding wired data connection;
the controller circuit configured for causing the free space optical transmitter to transmit, to each mobile network device, a corresponding data transmission on the modulated light beam, at a data rate of at least ten gigabits per second (10 Gb/s), for supply of data according to the corresponding determined broadband data requirement.

12. The syst

Assignees

• Cisco Tech Inc

Inventors

• Byers Charles Calvin
• Pirics Chris

Classifications

• H04J14/08

  Time-division multiplex systems · CPC title

• B61B3/02

  with self-propelled vehicles · CPC title

• H04B10/116 Primary

  Visible light communication · CPC title

• H04B10/1141

  One-way transmission · CPC title