The ZigBee Architecture An Introduction May 18 th, 2011 Session I Introduction & Architecture I, 1
Contents Outline 1. Architectural Overview 2. Market Positioning 3. Convergence 4. Summary 2
ch.1: IEEE802.15.4 & ZigBee protocol stack System developer 3
ch.1: architectural overview a) b) c) d) e) f) g) bidirectional communication mostly broadcast traffic star topologies; support of TCP/IP meshed multi-hop topologies interoperability on application level interoperability on application level interoperability on application level 802.15.4 Compliant Product ZigBee Compliant Platform Manufacturer Specific Profile (MSP) ZigBee Certified Product proprietary application software proprietary application software proprietary application software application software application software application software application software Private Application Objects Published ZigBee Application Objects Standard ZigBee Application Objects ZigBee APS SW ZigBee APS SW ZigBee APS SW ZigBee NWK SW ZigBee NWK SW ZigBee NWK SW ZigBee NWK SW reduzierte MAC SW MAC SW MAC SW MAC SW MAC SW MAC SW PHY SW PHY SW PHY SW PHY SW PHY SW PHY SW RF chip RF chip RF chip RF chip Steinbeis Innovation RF Centre chipembedded Design RF and chip Networking 4 RF chip
ch.1: architectural overview plethora of options some examples level of conformance including application profiles optional vs. mandatory clusters parameter setting choice of feature set stack profile binding policies time constants & retries use of commissioning cluster choice of security settings ZigBee PRO Feature Set supports scalability (incl. meshing & routing) security (incl. PK-cryptography) safety (incl. 16 ch. frequency agility) modularity (incl. cluster definition) interoperability (incl. profile definitions) 5
ch.1: Architectural Overview Conflicts plethora of options vs. interoperability products with USPs vs. interoperability fine granularity vs. interoperability and ease of use generic platforms vs. streamlined products 6
ch.2: Market Positioning hardware products large choice of IEEE802.15.4 conformant transceivers Atmel, Ember, Freescale, Jennic, Microchip, Oki, PhyChips, Texas Instruments, UBEC current large volume products with good roadmaps large choice of transceivers + MCU platforms ZigBee conformant platforms extremely large choice of modules software products large number of IEEE802.15.4 stacks significant number of ZigBee-stacks various business models 7
ch.2: Market Positioning tools sniffers & analyzers commissioning code & application generators tests gateways system design experience SIG activity hub: ZigBee to IP-gateway complete hardware & firmware from stzedn 8
ch.2: Market Positioning system products significant number of system (!) products available or under development major markets and applications 9
ch.2: Market Positioning ZigBee remains the only standard, which is open / global / vendor independant / application independant shift from industrial / process automation 10
ch.2: Market Positioning closed loop process of standardization interoperation certification 11
ch.3: Convergence Introduction of Short Range Wireless Networks goes in line with general re-definition of architectures and applications network level system level application level example: smart metering driven in different national / regional markets driven from different applications driven from different companies (and associations) 12
ch.3: Convergence need of integration opening for neighbor protocols 13
ch.3: Convergence Protocol / Networking Stack Legacy Trend #1: protocol stacks with dedicated application layer specific interfaces (data & management) application layer (EN 13757-3) network layer (EN 13757-5) wireless data link layer physical layer EN 13757-4 wired data link layer physical layer EN 13757-2 14
ch.3: Convergence Protocol / Networking Stack change in paradigms ZigBee and 6lowpan converge historical decision driven by application markets and system integrators smart metering / health care long evoluation of IPv6 over IEEE802.15.4 complexity: data path vs. management path MCPS-SAP MAC Common Part Sublayer PD-SAP PHY layer MLME-SAP MLME (MAC PIB) PLME-SAP PLME (PHY PIB) RF-SAP 15
ch.3: Convergence Application Layer Legacy Trend #2: media independant application layers highly generic large overhead change in paradigms reduced overall (system) overhead increased capabilities of devices, i.e. gateway level Examples metering: DLMS health care IEEE11073-20601 16
ch.3: Convergence unified networking (?) large networks are in place, for specific applications metering infrastructure supervision home networking home area / neighborhood area networks with specific applications specific (network) managers specific cost models inter net with (hopefully) increasing degree of integration 17
ch.4: Summary Outlook further integration / convergence on the different layers reduce system complexity / increase stack complexity further trend of modularity connectivity as a modular plug-in further trend to predefined solutions large community IEEE802.15.4 2.4GHz sensor read-out system CC2420 + ARM7TDMI complete hardware & firmware from stzedn 18
Further Reading add l material on http://www.stzedn.de 19
Thank you for being on the 20