Designing Delay-Tolerant Data Services for the. Network of Things

Transcription

1 Designing Delay-Tolerant Data Services for the Daniel Austin Interstellar Travel, Inc. Network of Things 1st Annual Big Data Innovation Summit

2 Big Ideas for Today s Talk The Internet of Things is Coming Delay-Tolerant Networking for the NoT Big Data is Key to Networking Millions of Small Devices Adoption will be Driven by Evolution of the Social Issues

3 The Network of Things If we had computers that knew everything there was to know about things using data they gathered without any help from us we would be able to track and count everything, and greatly reduce waste, loss and cost. We would know when things needed replacing, repairing or recalling -Kevin Ashton, 1989

4 A Day in the Connected Life a system where the Internet is connected to the physical world via ubiquitous sensors

5 Characteristics of the Network of Things Many small messages Intermittent transmission Connectionless Stateless No guaranteed delivery Lazy/No Acknowledgements Mesh architectures based on proximity Mixed/variable security

6 Service Types for the Network of Things Proximity Identity Authorization/Eligibility History Personalization Location Companions/Presence Service Discovery Ordering/Billing/Payments

7 WPAN (NoT) Protocols IEEE was designed for wireless PANS ZigBee and other protocols 6LowPAN (RFC 6282) describes how to route IPv6 over networks Problems with IPv6 & NoT IPv6 requires minimum MTU of 1280 bytes Far too large for IoT messages Overhead for addressing ~ 40 bytes of IPv bytes for TCP IP designed for bulk data transport Congestion is not an issue for the NoT!

8 Bluetooth Low Energy vs 6LowPAN BLE Range = 100m Security = 128-bit AES MSG SZ = 128 octets BLE 4.0 protocol Clean separation of BLE protocol stack from TCP/IP 6LowPAN Range = 20m Security = 128-bit AES MSG SZ = 127 octets IPv6 over Mixed protocol stack

9 Delay-Tolerant Networking TCP/IP Assumptions: End-to-End connection Short, fixed delays Symmetric data rates Low error rates Some knowledge of existing network DTNs originated at NASA for interplanetary communications (RFC 4838 & 5050) Applies to all intermittently connected scenarios, including the NoT

10 How DTNs Work TCP/IP DTN Source; DTN SIG

11 DTNs: From Cars to Interplanetary Networks Source; DTN SIG

12 CAP Theorem & DTNs Source: DTN SIG

13 Big Data and the Network of Things Many Small Devices = Big Data Consistency, Availability, and (network) Partition take on new meanings in the NoT DTNs weaken CAP assumptions Consistency can t easily be checked Big Data, NoT, and Security Not based on encryption Anonymity through disaggregation

14 Are You a Big Data Problem? Each person will generate roughly 20 petabytes of data over the course of a lifetime Users have little control over collection and storage , documents, receipts, bills (!), your car, music, books Pervasive computing multiplies the problem Majority of data valueless out of context Security & Privacy concerns Networks of Things instead of Internet of Things Security by data partition

15 Ubiquitous/Anonymous Peering Patterns Peer-to-peer Low levels of security Resilient to network partitions Proximity based no identity Good for service discovery

16 Client/Server Patterns Clients transmits to one server Higher Security Requires server asymmetry Can offer additional services History Personalization Identity

17 Design Rules for Data Services Security & Privacy First!! Delay tolerance required Idempotent/stateless Messages vs. Request/Response Anticipate Maximum Mesh Batched/Bundled vs. Event-Driven

18 Big Takeaways IoT <-> DTNs <-> Big Data pervasive = invasive? Evolution of Big Data Depends on the IoT Delay-tolerance for mobile networks Realistic assumptions CAP theorem, store-and-forward consistency Online/offline distinction is blurring Only expect partial adoption, based on loose aggregations Networks of Things vs. Internet of Things

19 By 2020 everyone, everything and everywhere will be connected in real time. More than 50 billion connected devices will be used in the Networked Society. Source:

20 Designing Delay-Tolerant Data Services for the Daniel Austin Interstellar Travel, Inc. Thank You! Network of Things 1st Annual Big Data Innovation Summit