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802.11n – Wireless Performance for Control?

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Presentation on theme: "802.11n – Wireless Performance for Control?"— Presentation transcript:

1 802.11n – Wireless Performance for Control?
Paul Brooks, Rockwell Automation Paul Didier, Cisco

2 Agenda Wired – Wireless Factory Vision and Use Cases
Deploying WiFi: Autonomous vs. Centralized management of Access Points 802.11N – Why its good for CIP and EtherNet/IP applications Interoperability: CCX – an industry best practice Cisco and Rockwell Automation Testing

3 Agenda Wired – Wireless Factory Vision and Use Cases
Deploying WiFi: Autonomous vs. Centralized management of Access Points 802.11N – Why its good for CIP and EtherNet/IP applications Interoperability: CCX – an industry best practice Cisco and Rockwell Automation Testing

4 Wireless Factory Vision
Long Haul (SCADA) Various IP based technologies Wireless Infrastructure Wireless IEEE n Access Point Long distance comms will use satellite, GPRS, 3G, WiMAX etc technologies, Internet Protocols (IP) ensures interoperability Process applications have needs better met by Wireless HART and ISA-100 than WiFi Factory Server Ethernet Switch Ethernet and EtherNet/IP are becoming dominant in processing and manufacturing – WiFi will follow WirelessHART ISA a Discrete Sensors Technology: In Research Process Instrumentation WirelessHART™ and/or ISA100.11a Wireless and Wired – 1 User Experience (Confidential – For Internal Use Only) Copyright © 2008 Rockwell Automation, Inc. All rights reserved. 4

5 Application Considerations
Common usage today Application restrictions not relevant to CIP Fidelity biggest challenge Paul ? Product available space ? Latency biggest challenge (Confidential – For Internal Use Only) Copyright © 2008 Rockwell Automation, Inc. All rights reserved. 5

6 Drivers for Wireless Applications More points of visibility and control
Tag Eliminating Wires and Cables Increase Reliability Replace cables (e.g., moving machinery) Reduce Installation Cost Wireless I/O, Wireless Sensor and mesh networks Reach great distances (SCADA) Enabling Portability and Mobility Mobile HMI (People) AGVs (Equipment) Communications (VoWLAN) Tracking Assets RFID Real-Time Location Services Remote Device Monitoring Troubleshooting / Maintenance Instrumenting existing machinery Video Surveillance Security and process monitoring Guest Access Paul There are numerous excellent applications for wireless industrial usage. This presentation touches on Wireless Ethernet (mature) and Wireless Sensors (developing).

7 Wireless Use Cases/Configurations
Operator moves from zone to zone around a machine Functions enabled and disabled according to location & user Display changes according to location & context Wireless AP Rotating Equipment Fixed equipment in hard to reach location Wireless connection lower cost than wired Standalone or integrated Mobile equipment full automated Moves through a number of access points Remote control maintained through cycle

8 Use Case – Anode Making Cranes: Mobile equipment 1200m traverse
Workers: Asset Management, Enterprise Planning Voice Moving Ramps: Hard to Reach 83 Ramps, 350 locations 4 Networks Installed!

9 Images from a Smelter On-machine Access Point
In-cabinet Client Gateway In-cabinet Access Point

10 Agenda Wired – Wireless Factory Vision and Use Cases
Deploying WiFi: Autonomous vs. Centralized management of Access Points 802.11N – Why its good for CIP and EtherNet/IP applications Interoperability: CCX – an industry best practice Cisco and Rockwell Automation Testing

11 WiFi Deployment Autonomous vs. Centralized
Autonomous Solution Controller-Based Solution Flexible architecture for campus, branch, home, and outdoor (Mesh) Fast roaming Centralized management and troubleshooting for lowest TCO Mobility Services for voice over WLAN, guest access, context-aware and Adaptive wIPS Industry leading scale for n Small plant or factory Base level Wi-Fi functionality Limited Scalability Upgrade Path to Controller-based Components Components Access Points (autonomous) Access Points (lightweight) WLAN Controller Location Services

12 CentralizedArchitecture Benefits
Management Flexible /Scalable Value-Added Services Mobile /Secure Reliable Ease of deployment/upgrade Load Balancing to optimize per user performance Dynamic RF Spectrum Management Buy as you grow licensing Appliance/Module Centralized Architecture Wired/Wireless Guest Access Voice over WLAN Location Service Media Ready (VideoStream) Roaming Security Policy Wireless IDS

13 Agenda Wired – Wireless Factory Vision and Use Cases
Deploying WiFi: Autonomous vs. Centralized management of Access Points 802.11N – Why its good for CIP and EtherNet/IP applications Interoperability: CCX – an industry best practice Cisco and Rockwell Automation Testing

14 What Painpoints Does 802.11n Solve?
Better performance for data, voice, video, and control Throughput—Up to 6 times greater than existing networks Reliability—Fewer packet retries Predictability—Consistent coverage and throughput Compatibility—Backwards support for a/b/g clients Future-Proofing—Guaranteed Interoperability –Tested/Validated 14

15 Technical Elements of 802.11n
MIMO 40Mhz Channels Packet Aggregation Backward Compatibility MIMO 40Mhz Channels Packet Aggregation Backward Compatibility Dan

16 Aspects of 802.11n MIMO (Multiple Input, Multiple Output) Beam Forming
40Mhz Channels Packet Aggregation Backward Compatibility MIMO (Multiple Input, Multiple Output) With Beam FormingTransmissions Arrive in Phase, Increasing Signal Strength Without Beam FormingTransmissions Arrive out of Phase HALLWAY MIMO AP Performance Dan Performed by Transmitter (Talk Better) Ensures Signal Received in Phase Increases Receive Sensitivity Works with non-MIMO and MIMO Clients Beam Forming Maximal Ratio Combining Spatial Multiplexing

17 Aspects of 802.11n MIMO (Multiple Input, Multiple Output) Beam Forming
40Mhz Channels Packet Aggregation Backward Compatibility MIMO (Multiple Input, Multiple Output) Multiple Signals Sent and Combined at the Receiver IncreasingFidelity With MRC Multiple Signals Sent; One Signal Chosen Without MRC MIMO AP Performance Dan Performed by Receiver (Hear Better) Combines Multiple Received Signals Increases Receive Sensitivity Works with non-MIMO and MIMO Clients Beam Forming Maximal Ratio Combining Spatial Multiplexing

18 Aspects of 802.11n MIMO (Multiple Input, Multiple Output) Beam Forming
40Mhz Channels Packet Aggregation Backward Compatibility MIMO (Multiple Input, Multiple Output) Information Is Split and Transmitted on Multiple Streams stream 1 MIMO AP stream 2 Performance Dan Transmitter and Receiver Participate Concurrent Transmission on Same Channel Increases Bandwidth Requires MIMO Client Beam Forming Maximal Ratio Combining Spatial Multiplexing

19 Aspects of 802.11n Packet Aggregation 40Mhz Channels
MIMO 40Mhz Channels Packet Aggregation Backward Compatibility Packet Aggregation 40Mhz Channels Carpooling Is More Efficient Than Driving Alone Without Packet Aggregation Data Unit Packet 802.11n Overhead Dan With Packet Aggregation Data Unit Packet 802.11n Overhead

20 11n Operates in Both Frequencies
Aspects of n MIMO 40Mhz Channels Packet Aggregation Backward Compatibility Packet Aggregation Backward Compatibility 2.4GHz 5GHz 802.11ABG Clients Interoperate with 11n AND Experience Performance Improvements 11n Operates in Both Frequencies Dan

21 802.11n It’s About a Whole Lot More Than Speed
Throughput Reliability Predictability 5x more throughput 2x more reliable 2x more predictable Enhanced file transfer and download speeds for large files Lower latency More consistent coverage and throughput for mobile applications Mbps Throughput Average Packet Retries Predictability of Throughput Standard Deviation of Packet Retries >5x Dan 11a/g – AP1240 2x 11a/g – AP1250 2x 11n – AP1250 130 92 60 IDEAL 802.11a/g with AP1240 802.11a/g with AP1250 802.11n with AP1250

22 Agenda Wired – Wireless Factory Vision and Use Cases
Deploying WiFi: Autonomous vs. Centralized management of Access Points 802.11N – Why its good for CIP and EtherNet/IP applications Interoperability: CCX – an industry best practice Cisco and Rockwell Automation Testing

23 Standards and Implementation Process
Standards Group Industry Group Company 802.11 WiFi Cisco Cisco adds differentiating features to the “minimal” set defined by WiFi. In the past, this has included better security. Features are licensed to RF chip vendors under “CCX” program The nature of engineers and the “design by committee” environment mean the IEEE often defines overly feature rich standards with many options The industry bodies’ role is remove much of the “bloat” introduced as “features” into the IEEE standards, often by people not even selling equipment “Feature Bloat” “Minimal Features” “Differentiated Features” How are WLAN standards created? - Roles

24 CCX Overview A partnership program to drive accelerated innovation and deliver value to mobile users Industry Mobility Solutions Infrastructure Open Mobility Services Architecture Standard based innovation Tested interoperability Innovative and reliable applications Consistent delivery of services across access networks Deploying applications Application Managing disparate networks Generic AP Mesh AP Lightweight AP Wireless Controller Addressing wave of devices Silicon - Device Secured and robust Mobile foundations Tested interoperability Platform for reliable and high value mobile applications Accelerating innovation while maintaining interoperability

25 Mobile Device Management
Christophe Servais CCX – Industry Standard Supplementing Wi-Fi certification with innovative and tested capabilities Over 120 vendors participants 70% of all features developed in the program have since achieved standard 90% of WiFi silicon is CCX certified. Services platform for reliable and high value mobility solutions Fast addressing customer pain points through accelerated innovation Flexible approach for optimum match of Service and Device function Commitment to Standards Delivering Mobile Services across transport layer Tested interoperability (Network, Device, OS) Foundation Robust and Secure connectivity Collaboration Voice and Video Context – Aware Location Mobile Device Management

26 CCX Services Building robust and secured Mobile foundations
Christophe Servais CCX Services Building robust and secured Mobile foundations Reliable and Accurate location Voice ready devices Voice quality monitoring Congestion management Remote diagnostic of mobile devices Context Aware Collaboration Management Location Future Services Voice - Video Future Services Foundation Robust and secure Connectivity Seamless connectivity 802.11 Future Media Future media Increasing business impact CCX services

27 Making the RF link more secure
Christophe Servais Making the RF link more secure Radio interface is composed of Data and Management traffic. How to ensure both traffics are secured? 802.11 Future Media Future media Foundation Location Future Services Context Aware Voice Collaboration Management Cisco Unified Network and CCX Mobile devices encrypt all management packets exchanged EAP-FAST natively provided on all CCX devices MFP allows protection from DOS attacks and quick detection of “Man in the Middle” and other Management Frame attacks Benefits : highest security made available at no additional cost

28 Ensuring fastest roaming with 802.1x
Christophe Servais Ensuring fastest roaming with 802.1x Encryption Keys are re-calculated at every association and re-association, delaying the roaming process. How to accelerate securely the management of keys when the mobile device roams ? 802.11 Future Media Future media Foundation Location Future Services Context Aware Voice Collaboration Management Cisco’s Centralized Key Management (CCKM) is a Key management protocol that enables fast 802.1x reauthentication. CCKM allows active AP and CCX Mobile device to derive new encryption key before re-association to accelerate the secure roaming process. Benefits : Ensures fastest secure roaming for optimum user experience

29 How CCX Works

30 Agenda Wired – Wireless Factory Vision and Use Cases
Deploying WiFi: Autonomous vs. Centralized management of Access Points 802.11N – Why its good for CIP and EtherNet/IP applications Interoperability: CCX – an industry best practice Cisco and Rockwell Automation Testing

31 Unicast I/O Control Connections
Enables a Logix controller to communicate to other EtherNet/IP devices via unicast Applies to standard I/O* and standard produced/consumed tags Unicast support for safety produced/consumed tags and safety I/O will be added at a later release V18 Enhancements making Logix Wireless Ready

32 Enhanced Testing – Point to Multi-Point
1756-ENBT Maximum recommended 4,000 pps RPI QTY ms 20ms 7 Min Latency 0.921 Ave Latency 1.075 Max. Latency 3.797 Test Configuration Paul Load QTY ID 5.67k pps 3 2ms 1-3 4 3ms 4-7 Wireless Performance Matches Wired for I/O Control with 1 Scanner

33 Enhanced Testing – Packet Aggregation
Test Configuration Paul Interface Load QTY ENBT #1 5000 pps 5 2ms ENBT #2 EN2T 9000 pps 9 Device limits are more significant than network limits

34 Wireless-N A Step Change in Technology
The step from Wireless-G to Wireless-N is as dramatic as the step from 10MBps Ethernet with Hubs to 100MBps Ethernet with Switches Making Mainstream Control Possible Dan (Confidential – For Internal Use Only) Copyright © 2008 Rockwell Automation, Inc. All rights reserved.

35 Summary – Key Takeaways
802.11n is right technology Ratified Already in use in process critical applications Unicast for control over wireless Active spectrum management is critical And it is a human responsibility Architecture options – Autonomous / controller based Autonomous – small localized point applications Controller based – scalable, multi-application, lower TCO Technology proven and deployed for Human mobility in the plant Mobile equipment Dan


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