Application Layer Protocols and Data Encoding for Constrained - PowerPoint PPT Presentation

Hauke Petersen Computer Systems and Telematics Breakout session on Application Layer Protocols and Data Encoding for Constrained Devices W3C Web of Things Workshop

Contents 1) Constrained devices 2) Radio/Network technologies 3) Common network stacks 4) Feasible alternatives? W3C Web of Things Workshop – 26.06.2014 2

Constrained devices If we expect billions of devices connected to the IoT by 2020, →someone has to pay for these Considering Moores law, devices get cheaper instead of more powerful We expect a vast amount of devices in the IoT to be (very) constrained. W3C Web of Things Workshop – 26.06.2014 3

Constrained devices 512 MB 16 KB 1-2 GB ~ 2 GB ~ 16 GB 8 KB 96 KB > 4 GB W3C Web of Things Workshop – 26.06.2014 4

Radio/Network Technologies IPv6 ethernet IEEE802.11 IEEE802.15.4 min 1500 byte 1500 byte 2304 byte Max Frame size: <= 127 byte very low medium high Packet loss: W3C Web of Things Workshop – 26.06.2014 5

Common network stacks XML JSON HTTP HTTP EXI CBOR TCP TCP CoAP CoAP UDP UDP IPv6 IPv6 6LowPAN 6LowPAN 100s to 1000s 100s of bytes 10s of bytes 10s of bytes of bytes W3C Web of Things Workshop – 26.06.2014 6

Alternatives Conventional Alternatives? protocolls / encodings HTML CoAP XML EXI CBOR JSON Which/Should alternatives should be considered in upcoming W3C discussions? Do we see future actions for the W3C? W3C Web of Things Workshop – 26.06.2014 7