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© 2005 Invensys IP and To V6 or not to V6 Geoff Mulligan Invensys Controls Co-chair of IETF 6LowPAN WG Chair Zigbee IPv6 Tech Group
© 2005 Invensys 2 Background Pentagon Pent-TIP/Pent-Unix/Arpanet USAFA (instructor) DEC/Sun SIP->IPv6 Couple of Startups Invensys – Chief Scientist
© 2005 Invensys 3 Invensys Business description Key statistics Leading global provider of components, systems and services used in: comfort and safety of commercial and residential living environments appliance controls for “white goods” OEMS large and small building systems commercial refrigeration systems Leader in process controls systems Differentiates itself in marketplace by depth and breadth of offerings and channels Revenue:$7bln Manufacturing facilities:20 Employees:8,500+ Gaoming Changzhou Utsinomiya Kuala Lumpur Slough Plymouth Genoa Oetwil Belluno Nurnberg Toronto Mansfield El Paso Matamoros Chihuahua Mexicali Corona Rockford Manufacturing Distribution Plain City Brownsville Long Beach Maryville Shanghai
© 2005 Invensys 4 Invensys
© 2005 Invensys 5 b Automotive HVAC Controls Humidistat and motor speed controls Time Controls Thermostats Heat alarms Time Controls
© 2005 Invensys 6 Why Wireless Reduce installation costs Flexibility Hundreds of sensors and Tens of controls Mantra – “No new wires” The network needs to be self-configuring to reduce planning The network needs to be self-healing to reduce maintenance The system needs to be reliable to be usable
© 2005 Invensys 7 Standards or Not Proprietary chosen for performance characteristics Standards perceived to be less optimized Standards provide for Lower cost, tools, experience, interoperability “Within 12 months technology will overcome performance gains by proprietary systems.”
© 2005 Invensys 8 Overview of 6LowPAN A simple low throughput wireless network comprising typically low cost and low power devices Devices in the network may work together to connect the physical environment to real world applications, e.g., wireless sensors networks Devices may also act as simple controls such as a remote control for a home Common topologies include – star, mesh, and combinations of star and mesh The Phy and MAC layers conform to IEEE standard
© 2005 Invensys MAC Unslotted or Slotted CSMA/CA Supports low power operation Supports AES for security MAC Frame size octets Frame payload size – 102 octets Provides peer-to-peer communication Can support higher layer mesh networks
© 2005 Invensys Network Topology End Device (RFD or FFD) Router (FFD) Coordinator (FFD) Mesh Link Star Link
© 2005 Invensys 11 Zigbee? Invensys – founder of Zigbee alliance Currently Large, Complex, Immature Solving wrong problem IP 2 (IP and IPR) Future Smaller, Mature, Stable Bridges and Gateways
© 2005 Invensys 12 IP Myths Headers are too big Stateless header compression Code size IP stacks available in 3-6K range Initial indications are MAC, AODV and IP stack under 20K RAM 1.5 to 2K are current estimates
© 2005 Invensys 13 A Meshy Problem Where to Mesh On top of IP Under IP Chose to mesh under IP Simplification for IP Allow for network layer replacement
© 2005 Invensys 14 Why V6 Common Infrastructure Hybrid networks Larger address space No need for configuration servers No DHCP server No need for NAT Header more easily compressed
© 2005 Invensys 15 V6 Header Compression Stateless header compression Unlike v4 header compression Use of redundant 15.4 fields MAC address Elimination/Compression of unused fields Version, DS, Flow, Next Header, Hop Limit Header can be compressed to just 4 bytes on-net and 12 bytes off-net Assumes network will not be a transit network
© 2005 Invensys 16 Invensys IPv6 Stack LiteAODVtinyIPv6/ICMPUDPv6SNMP LiteSockets Range: > 100m Reliable and self healing network: 30 nodes (4 to 5 hops) Battery life: > 1 year using AA Network of PANs: RIP bad but does work Low Cost: < $10 now Stack: < 15K code size
© 2005 Invensys Hardware Vendors Freescale, Chipcon, Atmel, ZMD, Integration Associates, Renesas SOCs – maybe too early RAM not NV constrained Sub $10 modules today Sub $3 in 2007
© 2005 Invensys 18 6LowPan Hardware
© 2005 Invensys 19 Current Applications Goodwatts Connected Home Home Controls Safer Home Eldercare
© 2005 Invensys 20 Goodwatts Energy Management (monitoring and control) Previously proprietary RF network Deploying IPv6 over mesh sensor network Need to tunnel v6! Pilots projects: California, Oregon, Nevada, Pennsylvania, Canada
© 2005 Invensys 21 Goodwatts Cable LCM HVAC
© 2005 Invensys 22 Residential Controls and Safety Interconnect Smoke Detectors CO Detectors Flammable Vapor Detectors Thermostat Water heater control Extend to Appliances Safer/Connected Home Not HomeAutomation or “Smart Home”
© 2005 Invensys 23 IETF and Zigbee 6LowPan working group 6 papers for Next IETF Problem space, Adaptation Layer, Service Discovery, Routing, Security IPv6 over Zigbee working group New stack profile for next alliance meeting
© 2005 Invensys 24 Contact information Geoff Mulligan
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