APPARATUS AND METHOD FOR DETERMINISTIC LATENCY-CONTROLLED COMMUNICATIONS IN PROCESS CONTROL SYSTEMS

• US 20100014492A1
• Filed: 07/21/2008
• Published: 01/21/2010
• Est. Priority Date: 07/21/2008
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Budampati, Ramakrishna S., Kolavennu, Soumitri N., Mahasenan, Arun V., Katuri, SrinivasaRao
• Granted Patent: US 8,107,390 B2
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04W 72/543 based on requested quality, e.g. QoS
• CPC Class Codes: H04W 84/22 with access to wired networks

Abstract

A method includes obtaining a data message having data associated with a process system and mapping the data message to one of multiple classifications. The method also includes wirelessly transmitting the data message, where a Quality of Service (QoS) associated with the transmission is based on the mapping. Mapping the data message could include identifying a type associated with the data message and mapping the data message based on the identified type. The type may include a publish message type, an alert message type, or a management message type. The publish message type could be mapped to an Unsolicited Grant Service (UGS) class, the alert message type could be mapped to a real-time Polling Service (rtPS) class, and the management message type could be mapped to a Best Effort (BE) or non-real-time Polling Service (nrtPS) class. A WiMAX standard could be used to transmit the message, and a WiMAX or WiFi standard could be used to obtain the message.

Claims

1. A method comprising:

obtaining a data message comprising data associated with a process system;

mapping the data message to one of multiple classifications; and

wirelessly transmitting the data message, wherein a Quality of Service (QoS) associated with the transmission of the data message is based on the mapping.

2. The method of claim 1, wherein wirelessly transmitting the data message comprises wirelessly transmitting the data message using a WiMAX standard.

3. The method of claim 1, wherein mapping the data message comprises:

identifying a type associated with the data message; and

mapping the data message based on the identified type.

4. The method of claim 3, wherein:

the type comprises one of;

a publish message type, an alert message type, and a management message type;

multiple data messages are obtained, mapped, and wirelessly transmitted; and

mapping the data messages comprises mapping each publish message type to an Unsolicited Grant Service (UGS) class, each alert message type to a real-time Polling Service (rtPS) class, and each management message type to a Best Effort (BE) or non-real-time Polling Service (nrtPS) class.

5. The method of claim 1, wherein wirelessly transmitting the data message comprises wirelessly transmitting the data message from a first wireless node to multiple second wireless nodes.

6. The method of claim 5, wherein the first wireless node operates in a soft handoff mode with respect to the second wireless nodes so that the first wireless node communicates simultaneously with the second wireless nodes.

7. The method of claim 1, wherein obtaining the data message comprises one of:

wirelessly receiving the data message from a first wireless node; and

generating the data message at a second wireless node.

8. The method of claim 7, wherein obtaining the data message comprises wirelessly receiving the data message from the first wireless node using a WiFi standard.

9. The method of claim 1, wherein wirelessly transmitting the data message comprises wirelessly transmitting the data message over a wireless backhaul link to a gateway coupled to a wired network.

10. An apparatus comprising:

a wireless transceiver; and

a controller configured to;

obtain a data message comprising data associated with a process system; and

provide the data message to the transceiver for wireless communication;

wherein the transceiver is configured to use a WiMAX standard to communicate the data message.

11. The apparatus of claim 10, wherein:

the controller is further configured to map the data message to one of multiple classifications; and

a Quality of Service (QoS) associated with the transmission of the data message is based on the mapping.

12. The apparatus of claim 11, wherein the controller is configured to map the data message by:

identifying a type associated with the data message; and

mapping the data message based on the identified type.

13. The apparatus of claim 10, wherein:

the controller is configured to obtain the data message by generating the data message; and

the transceiver operates as a WiMAX subscriber station configured to communicate with one or more WiMAX base stations.

14. The apparatus of claim 10, wherein the controller is configured to obtain the data message by receiving the data message using the transceiver or a second transceiver.

15. The apparatus of claim 14, wherein the transceiver or the second transceiver uses a WiFi standard to receive the data message.

16. The apparatus of claim 14, wherein the transceiver or the second transceiver operates as a WiMAX base station configured to communicate with a WiMAX subscriber station.

17. The apparatus of claim 10, wherein the controller is configured to operate in a soft handoff mode with respect to multiple WiMAX base stations, the WIMAX base stations to receive the transmitted data messages.

18. A system comprising multiple wireless nodes configured to communicate wirelessly, at least one of the wireless nodes comprising:

a wireless transceiver; and

a controller configured to;

obtain a data message comprising control data for controlling equipment in a process system; and

provide the data message to the transceiver for wireless communication;

wherein the transceiver is configured to use a WiMAX standard to communicate wirelessly and to provide a specified Quality of Service (QoS) for the control data.

19. The system of claim 18, wherein:

the controller is further configured to map the data message to one of multiple classifications; and

the Quality of Service (QoS) associated with the transmission of the data message is based on the mapping.

20. The system of claim 18, wherein:

the controller is configured to initiate transmission of the data message to multiple WiMAX base stations; and

the controller is configured to operate in a soft handoff mode with respect to the WiMAX base stations.