V0.2ROLL Routing Requirements; The connected home1 Anders Brandt March 2008

V0.2ROLL Routing Requirements; The connected home2 The connected home A world of Buzzwords... –Home Control or –Home Automation or –Intelligent Home or –Smart House or –... (pick one)

V0.2ROLL Routing Requirements; The connected home3 The connected home

V0.2ROLL Routing Requirements; The connected home4 Entering a room

V0.2ROLL Routing Requirements; The connected home5 Entering a room, v.2

V0.2ROLL Routing Requirements; The connected home6 Leaving home OFF

V0.2ROLL Routing Requirements; The connected home7 Leaving home, Cont’d ”Turn off group” –User experience matters Lamps must (appear to) react at the same time Visible lamps typically within direct range => 1.Address group unacknowledged 2.Address individual nodes to ensure new state –IP Multicast is not the solution IP Multicast requires subscription from targets Groupcast is needed (bitmap addressing in subnet)

V0.2ROLL Routing Requirements; The connected home8 Moving nodes Media center is within direct range of remote control

V0.2ROLL Routing Requirements; The connected home9 Moving nodes, Cont’d Media center is within direct range of remote control Now the user walks to the kitchen...

V0.2ROLL Routing Requirements; The connected home10 Moving nodes, Cont’d Remote control is out of range

V0.2ROLL Routing Requirements; The connected home11 Moving nodes, Cont’d Remote control must find available ”routers”

V0.2ROLL Routing Requirements; The connected home12 Moving nodes, Cont’d ”Router” is used to talk to media center

V0.2ROLL Routing Requirements; The connected home13 Devices in the home Lamp module Switch module Movement sensor Smoke alarm Remote control

V0.2ROLL Routing Requirements; The connected home14 Devices in the home, Cont’d Lamp module & Switch module –Static location –Always on –Distributed all over the house –Obvious routing resources (battery backup is rare)

V0.2ROLL Routing Requirements; The connected home15 Devices in the home, Cont’d Movement sensor & Smoke alarm –Battery-operated –Mounted in inconvenient places –Important to safety –Battery lifetime optimized via 99%+ sleep mode –Requesting remaining battery is difficult Node only listens rarely –Routing should be avoided

V0.2ROLL Routing Requirements; The connected home16 Devices in the home, Cont’d Remote control –Battery-operated –Mobile –Only wakes up when operated (or moved) –May have to remember several gateways –Not attractive as routing resource

V0.2ROLL Routing Requirements; The connected home17 draft-brandt-roll-home-routing-reqs Application use cases Specific routing requirements for the connected Home A comment on traffic patterns

V0.2ROLL Routing Requirements; The connected home18 draft-brandt-roll-home-routing-reqs Support for multiple paths. Nodes may be –failing –powered off –moved Ability to locate a working path within 250ms Neighbor discovery must be smart or frequent –Consumers move nodes at will...

V0.2ROLL Routing Requirements; The connected home19 draft-brandt-roll-home-routing-reqs ”Groupcast” –Ability to address a set of devices, e.g. lamps –Reveiving nodes are grouped by the sender (IP multicast receivers join a group individually) Bug: ”all devices (multicast)” – should read “all devices (broadcast)”

V0.2ROLL Routing Requirements; The connected home20 draft-brandt-roll-home-routing-reqs Constrained routing –Routing must respect node limitations CPU speed Memory size Battery capacity Sleep intervals Safety (Do not drain the battery of a smoke alarm) convenience of changing battery (Do not drain the battery of a ceiling-mounted sensor)

V0.2ROLL Routing Requirements; The connected home21 draft-brandt-roll-home-routing-reqs Scalability and traffic patterns –Support 200+ nodes in a subnet (Many sensors/light devices in a future home) –Large systems structured into many subnets (Cabled) backbone Managability Security Isolating problems (all the usual IP reasons)

V0.2ROLL Routing Requirements; The connected home22 draft-brandt-roll-home-routing-reqs Traffic patterns –Central lighting control any-to-one + one-to-many (all switches talk to the central controller. Controller controls light) –Distributed mesh system any-to-many (many controllers/switches control light devices directly)

V0.2ROLL Routing Requirements; The connected home23 Anders Brandt Conclusion Unique requirements to routing Real applications - it is out there already... Should be considered in protocol studies Comments are welcome on the list