PicoNet:1 WirelessNet Tseng Piconet: Embedded Mobile Networking F. Bennett, D. Clarke, and J. B. Evans in IEEE Personal Communications, Vol. 4, No. 5, Oct. 1997, pp presented by Yu-Chee Tseng --

PicoNet:2 WirelessNet Tseng Embedded Mobile Networking  There already exist many simple communication devices around our everyday life: phone, fax, copy machine printer, portable computer, PDA electronic access control to buildings and roads banking machine public information terminal, etc.  Imagine how much we may benefit if these devices can TALK with each other.

PicoNet:3 WirelessNet Tseng Benefit of Embedded Networks  Embedded Network: a small, wireless, portable communication device can be embedded in many communication devices  and thus connect them together  Enhanced personal connectivity we have a multitude of connections to many devices  Context awareness the connectivity differs as we move around

PicoNet:4 WirelessNet Tseng Piconet of ORL  Developed by ORL (Olivetti and Oracle Research): general purpose low powered ad-hoc radio  Can talk to a multitude of computing and communication devices: static, mobile, or embedded used for sensing, communication, and control to support only a “base level” of connectivity between things.

PicoNet:5 WirelessNet Tseng Technological Choices of Piconet  ubiquitous periodically convey its state to others indoor or outdoor, exposed or embedded, line-of-sight or diffused  low-power, low-rate, low-range sleep (switched off) most of the time  radio-based IrDA (infrared) was not chosen as its inappropriateness in outdoor use

PicoNet:6 WirelessNet Tseng Prototype Piconet Hardware  size: 12cm x 7cm  implemented in FPGA  major components: radio protocol runtime environment attribute store

PicoNet:7 WirelessNet Tseng Radio  418 MHz FM transceiver  around 5 meters of transmission range low-powered and cheap greater re-use of radio channel close to human’s definition of “proximity”

PicoNet:8 WirelessNet Tseng Protocol  ad-hoc, without base station  for short-lived transaction, not long-lived stream of data  4b6b DC balanced encoding  support 2 kinds of multicast: well-known (pre-assigned) transient (dynamically created)

PicoNet:9 WirelessNet Tseng Runtime Environment  on-board kernel a message queue a scheduler  on-board loader

PicoNet:10 WirelessNet Tseng Attribute Store  In Piconet, each node is responsible for describing itself to the rest of the world. any other node is thus able to determine what kind of services is provided by the device.  A mapping between a device’s name and service type should be supported. called “attribute store” in Piconet

PicoNet:11 WirelessNet Tseng What a Piconet Node Looks Like?

PicoNet:12 WirelessNet Tseng Board and radio piggy-back Radio piggy-back in place

PicoNet:13 WirelessNet Tseng Application #1: Automatic Temperature Report  a temperature sensor with a Piconet interface  another node coming close to this sensor  a communication example: QuerySensor’s Reply GetAttribute(“/name”)“/name=Temperature Sensor” //discover sensor name GetAttribute(“/temp/C/value”)“/temp/C/value” = “17” //get temperature WatchAttribute(“/temp/C/change5”)“WatchHandle 01” 01 “tmp/C” = “24” //submit a handle, and //watch for any temperature change... UnwatchAttribute(01)//release handle //or timeout, if the node disappears

PicoNet:14 WirelessNet Tseng Application #2: Pico + GPS in a Car an in-car GPS with Pico (can talk to many devices in the car) a map system for navigation an “authorized” mobile phone which can report the driver’s current location to someone far away (or, for location coordination) a PDA in briefcase which logs a “trace” of this trip (when returning to office, the log can be automatically entered to database)

PicoNet:15 WirelessNet Tseng Application #3: Integration with Existing Services  “authorized” phone, printer, etc  control of home appliances: VCR, microwave, clock, radio, PDA house heating system, control house lighting connecting to networks for , WWW, etc.  Only your imagination can limit!!

PicoNet:16 WirelessNet Tseng Application #4: Tour Guide Pico at road sign and gateway to guide direction and offer tour info. information terminals at building (museum, gallery, tourist site)

PicoNet:17 WirelessNet Tseng Demo  A music CD with a piconet!!