LOW POWER WIRELESS NETWORK FOR TRANSPORTATION AND LOGISTICS

• US 20120203918A1
• Filed: 02/09/2011
• Published: 08/09/2012
• Est. Priority Date: 02/09/2011
• Status: Active Grant

• Current Assignee: Cubic Corporation, RSAE Labs Incorporated
• Original Assignee: Cubic Corporation
• Inventors: Berenberg, Paul, Ryshakov, Igor, Chen, Dongyan, Danielyan, Georgi
• Granted Patent: US 9,253,635 B2
• Time in Patent Office: Days
• US Class Current: 709/229
• CPC Class Codes: H04W 12/06 Authentication
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Embodiments of methods and devices are disclosed for enabling network devices to join a network. These embodiments generally include a first network device, which is joined to the network, sending authentication information. If the authentication information is determined as valid by a second network device, the second network device sends a join request toward the first network device. During or after the joining process, the first and second network devices can share scheduling information. These embodiments enable a network to have additional security while consuming low amounts of power.

Claims

1. A method for enabling network devices to join a low-power wireless network, the method comprising:

sending, with a first network device, authentication information relating to the low-power wireless network wherein;

the first network device is joined with the low-power wireless network, and

the authentication information is sent wirelessly toward a second network device;

receiving the authentication information with the second network device, the second network device not being joined with the low-power wireless network;

determining, with the second network device, that the authentication information is valid; and

sending, with the second network device, a request to join the low-power wireless network, wherein the request to join the low-power wireless network;

comprises a unique identifier of the second network device,

is sent wirelessly toward the first network device, and

is sent after determining, with the second network device, that the authentication information is valid.

2. The method for enabling network devices to join the low-power wireless network recited in claim 1, further comprising sending sensor information with the second network device wherein:

the sensor information is sent after the request to join the low-power wireless network is sent, and

the sensor information is sent wirelessly toward the first network device.

3. The method for enabling network devices to join the low-power wireless network recited in claim 2, further comprising receiving, with the second network device, the sensor information from at least one sensor communicatively coupled with the second network device.

4. The method for enabling network devices to join the low-power wireless network recited in claim 1, further comprising:

determining, with the first network device, a plurality of schedules;

sending scheduling data wirelessly with the first network device, the scheduling data indicative of the plurality of schedules;

receiving the scheduling data with the second network device;

determining, with the second network device, the plurality of schedules;

selecting, with the second network device, a schedule from the plurality of schedules; and

sending selection data wirelessly with the second network device, the selection data indicative of the selected schedule.

5. The method for enabling network devices to join the low-power wireless network recited in claim 4, wherein:

the scheduling data comprises a plurality of identifiers, each identifier indicating a corresponding schedule of the plurality of schedules; and

determining the plurality of schedules with the second network device includes correlating each of the plurality of identifiers with the corresponding schedule.

6. The method for enabling network devices to join the low-power wireless network recited in claim 4, wherein the scheduling data further is indicative of a radio frequency (RF) channel associated with each of a plurality of time slots associated with the plurality of schedules.

7. The method for enabling network devices to join the low-power wireless network recited in claim 4, further comprising:

sending slowdown data wirelessly with the first network device, wherein the slowdown data is indicative of a slowdown factor;

receiving the slowdown data with the second network device; and

reducing a frequency of subsequent communications between the first network device and the second network device based, at least in part, on the slowdown factor.

8. The method for enabling network devices to join the low-power wireless network recited in claim 7, wherein at least one of the subsequent communications corresponds to the selected schedule.

9. The method for enabling network devices to join the low-power wireless network recited in claim 1, wherein the authentication information comprises a first set of authentication information relating to the low-power wireless network, further comprising

sending, with the second network device, a second set of authentication information relating to the low-power wireless network.

10. The method for enabling network devices to join the low-power wireless network recited in claim 1, wherein the second network device uses a time value in determining that the authentication information is valid.

11. The method for enabling network devices to join the low-power wireless network recited in claim 10, further comprising generating the time value, with the second network device, using synchronization data received wirelessly from the first network device.

12. A network device for communicating sensor information, the network device comprising:

a battery;

a wireless interface;

a processing unit, communicatively coupled with the battery and the wireless interface, configured to;

detect, using the wireless interface, authentication information relating to a network;

determine that the authentication information is valid;

send, using the wireless interface, a request to join the network, wherein the request to join the network;

comprises a unique identifier of the network device, and

is sent after the network device determines that the authentication information is valid.

13. The network device for communicating sensor information recited in claim 12, further comprising at least one sensor communicatively coupled with the processing unit.

14. The network device for communicating sensor information recited in claim 12, wherein the processing unit is further configured to:

determine, using scheduling data received with the wireless interface, a plurality of schedules;

select a schedule from the plurality of schedules; and

send, using the wireless interface, selection data indicative of the selected schedule.

15. The network device for communicating sensor information recited in claim 14, further comprising a memory, wherein:

information indicative of the schedule is stored in the memory; and

determining the plurality of schedules includes;

identifying a plurality of identifiers in the scheduling data, wherein each identifier indicates a corresponding schedule; and

correlating each identifier with the corresponding schedule.

16. The network device for communicating sensor information recited in claim 14, wherein:

the wireless interface is configured to send data using a plurality of radio frequency (RF) channels; and

determining the plurality of schedules includes identifying an RF channel associated with each of a plurality of time slots associated with the plurality of schedules.

17. The network device for communicating sensor information recited in claim 14, wherein the processing unit is further configured to:

determine, using slowdown data received with the wireless interface, wherein the slowdown data is indicative of a slowdown factor; and

reduce a frequency of subsequent data communications with the wireless interface based, at least in part, on the slowdown factor.

18. The network device for communicating sensor information recited in claim 17, wherein at least one of the subsequent data communications corresponds to the selected schedule.

19. The network device for communicating sensor information recited in claim 12, wherein the network device uses less than 2 milliwatts (mW) of power.

20. The network device for communicating sensor information recited in claim 12, wherein:

the authentication information comprises a first set of authentication information relating to the network; and

the processing unit is further configured to cause the network device to send, using the wireless interface, a second set of authentication information relating to the network.

21. The network device for communicating sensor information recited in claim 12, wherein:

the processing unit is further configured to provide a time value; and

the time value is used in determining that the authentication information is valid.

22. The network device for communicating sensor information recited in claim 21, wherein the processing unit is further configured to generate the time value based, at least in part, on synchronization data received with the wireless interface.

23. A network device for communicating sensor information, the network device comprising:

a battery;

a wireless interface;

a processing unit, communicatively coupled with the battery and the wireless interface, configured to;

send, using the wireless interface, authentication information relating to a network;

detect, using the wireless interface, a request to join the network, wherein the request to join the network;

comprises a unique identifier of a second network device, and

is detected after authentication information is sent.

24. The network device for communicating sensor information recited in claim 23, wherein the processing unit is further configured to detecting sensor information with the wireless interface wherein the sensor information is sent after the request to join the network is sent.

25. The network device for communicating sensor information recited in claim 23, further comprising at least one sensor communicatively coupled with the processing unit.

26. The network device for communicating sensor information recited in claim 23, wherein the processing unit is further configured to:

determine a plurality of schedules;

send, using the wireless interface, scheduling data, wherein the scheduling data is indicative of the plurality of schedules; and

detect, using the wireless interface, selection data, wherein the selection data indicative of a selected schedule.

27. The network device for communicating sensor information recited in claim 26, further comprising a memory storing information indicative of the schedule;

and

the processing unit is further configured to include a plurality of identifiers in the scheduling data, wherein each of the plurality of identifiers corresponds to a schedule of the plurality of schedules.

28. The network device for communicating sensor information recited in claim 26, wherein:

the wireless interface is configured to send data using a plurality of radio frequency (RF) channels; and

the processing unit is further configured to include, in the scheduling data, information regarding an RF channel associated with each of a plurality of time slots associated with the plurality of schedules.

29. The network device for communicating sensor information recited in claim 26, wherein the processing unit is further configured to:

determine a slowdown factor;

send, using the wireless interface, slowdown data indicative of the slowdown factor; and

reduce a frequency of subsequent data communications with the wireless interface based, at least in part, on the slowdown factor.

30. The network device for communicating sensor information recited in claim 29, wherein at least one of the subsequent data communications corresponds to the selected schedule.

31. The network device for communicating sensor information recited in claim 23, wherein the network device uses less than 2 milliwatts (mW) of power.

32. The network device for communicating sensor information recited in claim 23, wherein:

the processing unit is further configured to provide a time value; and

the time value is used to create the authentication information.

33. The network device for communicating sensor information recited in claim 32, wherein the processing unit is further configured to use the wireless interface to send synchronization data based, at least in part, on the time value.