Internet 0 engineering workshop

wired and wireless transports

   DC powerline (two-wire)
      100 nodes, <= 100m, 100 kcs ~= 56 kbps
   three-wire (data, power, ground)
      ~ Mbps, km (~= RS485)
   RF
      ISM FSK 900 Mhz, 300 MHz, 13.56 Mhz
      i0 radios ~= slow UWB
      antennas
   AC
   free-space optical
      line-of-sight
      km, Gbps
      no regulation
   acoustic
      1 kbps
      no regulation, no leakage

   homework: relative power consumption

   tentative conclusion AC:
      24, 110, 220
      isolation
      up-rate DC nodes
      check EMC concerns

   MAC
      -> p-persistent CSMA
         adaptive
      non-persistent CSMA
      CDMA = research
      v6 hash
      token passing

   routing
      v1: subnet = now
      v2: ROLL (routing over low-power lossy networks) = JP+
      v3: constrained optimzation = Neil+

building and industrial automation

   leaf node: switch, sensor, DC 1.7A out
   serial: 2, 3-wire i0, RS-232 SLIP
   sensors: light, temperature, sound, AC current
   control: AC switch
   display: video terminal
   input: PS2 keyboard

security

   crypto
     -> SEA-TP ~= Francois, David D., David K., Kerry
        = randomness?
     SEA-DP?
        = time?

    authentication, authorization, ...
    
lunch

thin servers and thinner clients

application protocols

   1: BACnet for buildings
   2: Modbus for industrial
   ~ Spring
   3: CIP?
   4: algorithmic?

system management and control

   management interfaces
   control algorithms
   -> need networks to manage
   need for local ports

RFCs

   option 1: clicks + p-persistent CSMA + IP
   -> option 2: layer 3: IP, layer 2: p- CSMA, layer 1: clicks (Kerry+Rob)
      applicability documents
      2.a: DC powerline = clicks, CSMA p, time intervals, ... (David+Todd)
      ...

revisit click encoding

   David D.

   local recovery of data rate
   local recovery of framing
   onset time only good parameter (not frequency, amplitude, phase, ...)
   easy simple decoding, admits more advanced decoding
   simple constraints imposed on installation
   "interdevice internetworking" "end-to-end modulation":
      going from one medium to another ~= stateless
   going from i0 to i1 ~= stateless
   0 != failure to detect