5 IEEE 802 WG15 OverviewIEEE15th working group of the IEEE 802 which specializes in Wireless PAN (Personal Area Network) standardsTG1 : Bluetooth based WPAN (finished)TG2 : Coexistence of WLAN and WPAN (finished)TG3 : High Rate WPAN (finished)TG3a : TG3 based Alternative PHY (withdraw)TG3b : TG3 based MAC Amendment (finished)TG3c : TG3 based Millimeter Wave Alternative PHY (in progress)TG4 : Low rate WPAN (finished)TG4a : TG4 Alternative PHY (finished)TG4b : TG4 based Revision (finished)TG4c : TG4 based Chinese amendment PHY (in progress)TG4d : TG4 based Japan amendment PHY (in progress)TG5 : TG3 & TG4 based Mesh networking (in progress)TG6 : Body Area Network (in progress)
8 Present Status of ZigBee Alliance Specification : ZigBee Pro (2007)Balloted SpecificationPRO FeaturesFeatures removed from ZigBee-2006 in PROCSKIP address assignmentTree routing (table routing remains)Features added to PROMesh network routingStochastic address assignment/address conflict resolutionMany to one routing/Source routingMulticastFrequency AgilityFragmentation/Re-assemblyLink Status/Symmetric routes
9 Present Status of ZigBee Alliance ZigBee Network Topologies and RoutingCluster tree networks provide for a beaconing multi-hop networkMesh network routing permits path formation from any source device to any destination device via a path formed by routing packets through neighborsZigBee Routing employs both Mesh Routing and Cluster Tree RoutingRouting by default will employ mesh and can fall back to cluster tree if a route error is generated on the packet
10 Advantages of IP-based Sensor Networks 상호운용성(Interoperability)인터넷상의 다른 디바이스 (WiFi, Ethernet, WiBro, Wireless Mesh, HSDPA 등으로 연결가능)이미 검증된 보안(Security) 기술인증(Authentication), 접근제어(access control), and 방화벽(firewall)Network design이미 검증된 응용계층 모델 및 서비스 (Established Application model and service소켓 API 기반의 센서 개발DNS, SLP통합 네트워크 관리기술 (Integrated Network Management)Ping, Traceroute, SNMP등전달계층 프로토콜 (Transport Protocols)End-to-End Reliable streaming
14 6lowpan Standardization Activities Rechartering Stage1. Produce "6LoWPAN Bootstrapping and 6LoWPAN IPv6 ND Optimizations“to define limited extensions to IPv6 Neighbor Discovery [RFC4861] for use specifically in low-power networks. This document (or documents) will define how to bootstrap a 6LoWPAN network and explore ND optimizations such as reusing the structure of the network (e.g., by using the coordinators), and reduce the need for multicast by having devices talk to coordinators (without creating a single point-of-failure, or changing the semantics of the IPv6 ND multicasts).This document or documents will be a proposed standard.2. Produce "Problem Statement for Stateful Header Compression in 6LoWPANs"to document the problem of using stateful header compression (2507, ROHC) in 6LoWPANs. Currently 6LoWPAN only specifies the use of stateless header compression given the assumption that stateful header compression may be too complex. This document will determine if the assumption is correct and describe where the problems are.This document will be informational.
15 6lowpan Standardization Activities 3. Produce "6LoWPAN Architecture"to describe the design and implementation of 6LoWPAN networks. This document will cover the concepts of "Mesh Under" and "Route Over", design issues such as operation with sleeping nodes, network components (both battery-and line-powered), addressing, and IPv4/IPv6 network connections. As a spin-off from that document, “6LoWPAN Routing Requirements" will describe 6LoWPAN-specific requirements on routing protocols used in 6LoWPANs, addressing both the "route-over" and "mesh-under" approach.Both documents will be informational.4. Produce "Use Cases for 6LoWPAN"to define, for a small set of applications with sufficiently unique requirements, how 6LoWPANs can solve those requirements, and which protocols and configuration variants can be used for these scenarios. The use cases will cover protocols for transport, application layer, discovery, configuration and commissioning.This document will be informational.
16 6lowpan Standardization Activities 5. Produce "6LoWPAN Security Analysis"to define the threat model of 6LoWPANs, to document suitability of existing key management schemes and to discuss bootstrapping/installation/commissioning/setup issues. This document will be referenced from the "security considerations" of the other 6LoWPAN documents.This document will be informational.
18 RL2N WG Charter: Overview Work Items Produce use cases documents for Industrial, Connected Home, Building and urban application networks.Describe the use case and the associated routing protocol requirements.The documents will progress in collaboration with the 6lowpan Working Group (INT area). Survey the applicability of existing protocols to L2Ns: analyze the scaling and characteristics of existing protocols and identify whether or not they meet the routing requirements of the L2Ns applications.Existing IGPs, MANET, NEMO, DTN routing protocols will be part of evaluation.
19 RL2N WG Charter: Overview Work Items (2) 3. Specification of routing metrics used in path calculation.This includes static and dynamic link/nodes attributes required for routing in L2Ns.4. Provide an architectural framework for routing and path selection at Layer 3 (Routing for L2N Architecture) Decide whether the L2Ns routing protocol require a distributed, centralized path computation models or both. Decide whether the L2N routing protocol requires a hierarchical routing approach.5. Produce a security framework for routing in L2Ns.
20 Interaction with other WGs 6lowpan: working on L2Ns overMANET: we may be end up using some (adapted) MANET protocols if the WG think that they satisfy the requirementsOther industry forums and SDOs.Zigbee,ITU,Bluetooth,
22 Industrial Automation Background Very important functionality60 million installed process control sensors4 million shipping per year~50% are “smart” today – wired networksHARTMost popular wired sensor network protocolHART 1: 1,200 baud digital comm over 4-20mA loopsWireless HARTRatified as a part of HART7 September 2007basedAnnounced vendors: ABB, Emerson, Siemens, …Multi-hop Mesh networkingSP100 wirelessDraft standard in 2008Adopted 6LoWPAN, but defining own routing, transportWireless HART and SP100 are a hybrid of circuit and packet switchedIEEE E WG created to standardize
23 Examples of Data flows Low frequency data collection 1/s to 1/hour; typically < 1/minLatency comparable to sample intervalTypically <50BSome time series >10kBAlarms<50BLog file upload1/day, 1/year10kB ..1MBHuman diagnostic query/responseMean latency importantFeedback controlMax latency importantLatency from minutes to <1ms (infeasible w/ 15.4 radios)Often all of these will be operating in different parts of the network
25 Intro to ISA100ISA100 – Wireless Systems for Industrial Automation and Process ControlISA100.11a- Wireless sensor and controls network- Utilizing- DLL provides mesh network using hybrid CSMA and TDMA- Using 6LoWPAN/IPv6/UDPv6 and TFTP- Backbone router inter-connects DLL subnets
32 Major Characteristics of IP-USN High InteroperabilitySeamless Connectivity to Internet (IPv4/v6 support)WiFi, Wireless Mesh, Ethernet, IEEE , RIP, OSPFHigh ReliabilityAutomatic Faulty Router Detection and Network RecoveryMAC-assisted End-to-End Transport Protocol (mTCP)Automatic State Restoration after RebootMulti-Router SupportHigh ScalabilityMulti-Router InterworkingScalable Tree-based Routing Protocol (HiLow)Mesh Routing ProtocolEasy ConfigurationAutomatic Neighbor DiscoveryIPv6 AutoconfigurationPlug & Sensing CapabilityManagementSNMP-based Management, pingWeb-based Monitoring and Management
33 High Interoperability Seamless Connectivity to Internet (IPv6/v4)Support various interfacesWIFI, Ethernet, Wireless Mesh, IEEESupport Internet standard routing protocolRIP, OSPFInteroperability test with KOREN대구광주대전수원서울2001:2b8:f2:2::42001:2b8:f2:2::3DWDM/OADMATM SwitchRouterGigabit Switch35Gbps2.5Gbps155Mbps
34 High Reliability Multi-Router Interworking Automatic Fault Detection and Network Recovery of 6lowpan routers and 6lowpan nodes
35 Bootstrapping and Commissioning Protocol with Multiple Routers
36 Bootstrapping and Commissioning Protocol with Multiple Routers Sensor node list on the console of multiple routers
37 High Reliability (2) Reduce redundant re-transmission with MAC support MAC-assisted End-to-End Transport Protocol (mTCP)Reduce redundant re-transmission with MAC supportServer6lowpanInternet
38 High Scalability (1) Wireless Subnet Large scale sensor network design Wireless Subnet AWireless Subnet BWireless Subnet CWireless Subnet D
39 Scalable Tree-based routing protocol (HiLow) High Scalability (2)Scalable Tree-based routing protocol (HiLow)No routing table requiredSimple ImplementationRobust 1-hop tree restructuring to link failuresShort-cut routing support
40 Easy Configuration DHCP support Automatic neighbor discovery (IPv6 address autoconfiguration, short address assignment, Application profile)Plug and Sense (PnS) SupportMain technology in Web-based Sensor Service PortalZero-Configuration to connect to the Internet and my ServerPlug and Sense support in especially DHCP environmentUser Permission Management