Methods and systems for communication protocol for distributed asset management

• US 8,525,642 B2
• Filed: 09/01/2010
• Issued: 09/03/2013
• Est. Priority Date: 05/08/2009
• Status: Active Grant

• Current Assignee: iControl, Inc.
• Original Assignee: iControl, Inc.
• Inventors: Tubb, Earl Fred, Inokuchi, Tom
• Primary Examiner(s): BROWN, VERNAL U
• Application Number:
  US12/874,062
• Publication Number:
  US 20100329232A1
• Time in Patent Office: 1,098 Days
• Field of Search: 340/5.73, 340/12.5, 370/349, 370/401, 370/389
• US Class Current: 340/5.73
• CPC Class Codes: E05B 2047/0024 Cams
• CPC Class Codes: E05B 2047/0058 by batteries
• CPC Class Codes: E05B 2047/0064 by solar cells
• CPC Class Codes: E05B 2047/0094 Mechanical aspects of remotely controlled locks electronic locks G07C9/00
• CPC Class Codes: E05B 2047/0095 Mechanical aspects of locks controlled by telephone signals, e.g. by mobile phones electronic locks G07C9/00
• CPC Class Codes: E05B 2047/0096 Mechanical aspects of locks whose actuation is dependent on geographical location, e.g. by means of a GPS system electronic locks G07C9/00
• CPC Class Codes: E05B 39/00 Locks giving indication of authorised or unauthorised unlocking with key identification means E05B35/001; alarm locks E05B45/00
• CPC Class Codes: E05B 47/0012 with rotary electromotors actuators with rotary electromotors per se H02K7/06, H02K23/68
• CPC Class Codes: E05B 67/22 Padlocks with sliding shackles, with or without rotary or pivotal movement
• CPC Class Codes: E05B 83/02 Locks for railway freight-cars, freight containers or the like; Locks for the cargo compartments of commercial lorries, trucks or vans
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A sending device generates a MAC frame to be transmitted over a wireless network. The MAC frame indicates a frame transmission type. A payload portion of the MAC frame is defined in accordance with a payload specification of a distributed asset management protocol corresponding to the indicated frame transmission type. The MAC frame is transmitted over the wireless network and received by a receiving device that is defined to recognize the MAC frame as the indicated frame transmission type. The receiving device is defined to process the payload portion of the MAC frame in accordance with the payload specification of the distributed asset management protocol corresponding to the indicated frame transmission type. Network discovery includes successively transmitting the MAC frame at a defined interval during a first period of time. Then, the MAC frame transmission is ceased for a second period of time. Then, transmission of the MAC frame resumes.

Claims

1. A method for communicating data over a wireless network in accordance with a distributed asset management protocol, comprising:

operating a sending device to generate a medium access control (MAC) frame to be transmitted over the wireless network, wherein generating the MAC frame includes,

setting a frame control field of the MAC frame to indicate a beacon frame transmission type, and

defining a payload portion of the MAC frame to include,

an identification of a device type of the sending device,

an identification of a type of data included within a data portion of the payload of the beacon frame,

an identification of an alternate channel to be used for subsequent communication,

a specification of a beacon interval duration of the sending device,

a specification of an association timeout duration for the receiving device,

a specification of a response interval duration for the receiving device,

a specification of a length of data included within the data portion of the payload of the beacon frame,

the data portion of the payload of the beacon frame, and

a specification of cyclic redundancy data associated with the payload of the beacon frame;

operating the sending device to transmit the generated MAC frame over the wireless network;

operating a receiving device to receive the MAC frame over the wireless network;

operating the receiving device to recognize the MAC frame as the indicated frame transmission type; and

operating the receiving device to process the payload portion of the MAC frame in accordance with the payload specification of the distributed asset management protocol corresponding to the indicated frame transmission type.

2. The method for communicating data over the wireless network in accordance with the distributed asset management protocol as recited in claim 1, wherein each of the sending and receiving devices is compliant with both an IEEE 802.15.4 standard and the distributed asset management protocol, wherein non-payload portions of the MAC frame are defined to be processed by wireless communication devices that are compliant with the IEEE 802.15.4 standard, and wherein payload portions of the MAC frame are defined to be processed by wireless communication devices that are compliant with the distributed asset management protocol.

3. The method for communicating data over the wireless network in accordance with the distributed asset management protocol as recited in claim 1, wherein the device type of the sending device is one of a fixed reader device, a mobile reader device, a handheld device, and a tag device.

4. The method for communicating data over the wireless network in accordance with the distributed asset management protocol as recited in claim 1, wherein the type of data included within the data portion of the payload of the beacon frame includes one or more of device date and time, device identification, device location, device velocity, and device differential global positioning system correction.

5. The method for communicating data over the wireless network in accordance with the distributed asset management protocol as recited in claim 1, wherein the beacon interval duration of the sending device is an integer value in seconds between successive beacon periods, wherein each beacon period is a duration of time during which MAC frames of the beacon frame type are successively transmitted at a set interval.

6. The method for communicating data over the wireless network in accordance with the distributed asset management protocol as recited in claim 5, wherein the beacon interval duration is within a range extending from 1 second to 255 seconds, and wherein the beacon period duration is 1 second, and wherein the set interval is within a range extending from 6 milliseconds to 19 milliseconds.

7. The method for communicating data over the wireless network in accordance with the distributed asset management protocol as recited in claim 5, wherein the association timeout duration for the receiving device is a number of beacon intervals that should pass without communication before the receiving device disassociates from the wireless network of the sending device.

8. The method for communicating data over the wireless network in accordance with the distributed asset management protocol as recited in claim 5, wherein the response interval duration for the receiving device is a maximum number of beacon intervals that are allowed to pass before the receiving device should communicate its status to the sending device.

9. A method for communicating data over a wireless network in accordance with a distributed asset management protocol, comprising:

operating a sending device to generate a medium access control (MAC) frame to be transmitted over the wireless network, wherein generating the MAC frame includes,

setting a frame control field of the MAC frame to indicate a broadcast network discovery frame transmission type, and

defining a payload portion of the MAC frame to include,

an identification of a device type of the sending device,

an identification of a message type as the broadcast network discovery frame,

an identification of an alternate channel to be used for subsequent communication,

a specification of a broadcast interval duration of the sending device,

a specification of a response interval duration for the receiving device,

an identification of data types included within the data portion of the payload of the broadcast network discovery frame,

the data portion of the payload of the broadcast network discovery frame, and

a specification of cyclic redundancy data associated with the payload of the broadcast network discovery frame;

operating the sending device to transmit the generated MAC frame over the wireless network;

operating a receiving device to receive the MAC frame over the wireless network;

operating the receiving device to recognize the MAC frame as the indicated frame transmission type; and

operating the receiving device to process the payload portion of the MAC frame in accordance with the payload specification of the distributed asset management protocol corresponding to the indicated frame transmission type.

10. The method for communicating data over the wireless network in accordance with the distributed asset management protocol as recited in claim 9, wherein the device type of the sending device is one of a fixed reader device, a mobile reader device, a handheld device, and a tag device.

11. The method for communicating data over the wireless network in accordance with the distributed asset management protocol as recited in claim 9, wherein the broadcast interval duration of the sending device is an integer value in seconds between successive broadcast periods, wherein each broadcast period is a duration of time during which MAC frames of the broadcast network discovery frame type are successively transmitted at a set interval.

12. The method for communicating data over the wireless network in accordance with the distributed asset management protocol as recited in claim 11, wherein the broadcast interval duration is within a range extending from 1 second to 255 seconds, and wherein the broadcast period duration is 1 second, and wherein the set interval is within a range extending from 6 milliseconds to 19 milliseconds.

13. The method for communicating data over the wireless network in accordance with the distributed asset management protocol as recited in claim 11, wherein the response interval duration for the receiving device is a maximum number of broadcast intervals that are allowed to pass before the receiving device should communicate its status to the sending device.

14. The method for communicating data over the wireless network in accordance with the distributed asset management protocol as recited in claim 9, wherein the type of data included within the data portion of the payload of the broadcast network discovery frame includes one or more of device date and time, device identification, device location, device velocity, and device differential global positioning system correction.

15. A method for communicating data over a wireless network in accordance with a distributed asset management protocol, comprising:

operating a sending device to generate a medium access control (MAC) frame to be transmitted over the wireless network, wherein generating the MAC frame includes,

setting a frame control field of the MAC frame to indicate a command frame transmission type, and

defining a payload portion of the MAC frame to include,

an identification of a device type of the sending device,

an identification of a message type as the command frame,

a specification of a length of data included within the data portion of the payload of the command frame,

an identification of a type of command communicated in the command frame,

the data portion of the payload of the command frame, and

a specification of cyclic redundancy data associated with the payload of the command frame;

operating the sending device to transmit the generated MAC frame over the wireless network;

operating a receiving device to receive the MAC frame over the wireless network;

operating the receiving device to recognize the MAC frame as the indicated frame transmission type; and

operating the receiving device to process the payload portion of the MAC frame in accordance with the payload specification of the distributed asset management protocol corresponding to the indicated frame transmission type.

16. The method for communicating data over the wireless network in accordance with the distributed asset management protocol as recited in claim 15, wherein the device type of the sending device is one of a fixed reader device, a mobile reader device, a handheld device, and a tag device.

17. A method for communicating data over a wireless network in accordance with a distributed asset management protocol, comprising:

operating a sending device to generate a medium access control (MAC) frame to be transmitted over the wireless network, wherein generating the MAC frame includes,

setting a frame control field of the MAC frame to indicate a data frame transmission type, and

defining a payload portion of the MAC frame to include,

an identification of a device type of the sending device,

an identification of a message type as the data frame,

a specification of a length of data included within the data portion of the payload of the data frame,

an identification of a packet type associated with the data included within the data portion of the payload of the data frame,

the data portion of the payload of the data frame, and

a specification of cyclic redundancy data associated with the payload of the data frame;

operating the sending device to transmit the generated MAC frame over the wireless network;

operating a receiving device to receive the MAC frame over the wireless network;

operating the receiving device to recognize the MAC frame as the indicated frame transmission type; and

operating the receiving device to process the payload portion of the MAC frame in accordance with the payload specification of the distributed asset management protocol corresponding to the indicated frame transmission type.

18. The method for communicating data over the wireless network in accordance with the distributed asset management protocol as recited in claim 17, wherein the device type of the sending device is one of a fixed reader device, a mobile reader device, a handheld device, and a tag device.

19. The method for communicating data over the wireless network in accordance with the distributed asset management protocol as recited in claim 17, wherein the identification of the packet type includes identification of the data included within the data portion of the payload of the data frame as either stored data or real-time data.

20. A method for communicating data over a wireless network in accordance with a distributed asset management protocol, comprising:

operating a sending device to generate a medium access control (MAC) frame to be transmitted over the wireless network, wherein generating the MAC frame includes,

setting a frame control field of the MAC frame to indicate a acknowledgement frame transmission type, and

defining a payload portion of the MAC frame to include,

an identification of a device type of the sending device,

an identification of a message type as the acknowledgement frame,

a specification of a length of the acknowledgement frame,

a specification of an acknowledgement value as either successful acknowledgement or failed acknowledgement,

an identification of a sequence number of a communication that is acknowledged by the acknowledgement frame,

an identification of a packet identifier that is acknowledged by the acknowledgement frame in the case of a successful acknowledgement, or an identification of an error type in the case of a failed acknowledgement,

a specification of a ready state of the sending device,

a specification of a incrementing counter value indicating a sequence of processed commands,

a specification of a sleep timer value used by the sending device,

an identification of a current network channel used by the sending device for communication over the wireless network, and

a specification of cyclic redundancy data associated with the payload of the acknowledgement frame;

operating the sending device to transmit the generated MAC frame over the wireless network;

operating a receiving device to receive the MAC frame over the wireless network;

operating the receiving device to recognize the MAC frame as the indicated frame transmission type; and

operating the receiving device to process the payload portion of the MAC frame in accordance with the payload specification of the distributed asset management protocol corresponding to the indicated frame transmission type.

21. The method for communicating data over the wireless network in accordance with the distributed asset management protocol as recited in claim 20, wherein the device type of the sending device is one of a fixed reader device, a mobile reader device, a handheld device, and a tag device.

22. The method for communicating data over the wireless network in accordance with the distributed asset management protocol as recited in claim 20, wherein the specification of the ready state of the sending device is zero if the sending device is ready to receive more data, and wherein the specification of the ready state of the sending device is a number of seconds greater than zero to be delayed before the sending device is ready to receive more data.