dash7 alliance protocol 1.0: low-power, mid-range sensor and actuator communication

DASH7 Alliance Protocol 1.0: Low-Power, Mid-Range Sensor and Actuator Communication

M. Weyn, G. Ergeerts, R. Berkvens

University of Antwerp – iMinds

Belgium

maarten.weyn@uantwerpen.be

B. Wojciechowski

Wroclaw University of Technology

Poland

Y. Takabov

Wizzilab

France

IEEE CSCN 2015 - Tokyo

Education

• Mobile Communication

• Communication Systems

• Ambient Intelligence:

Low Power Connected Systems

Research

• Localization

from Opportunistic to Just Enough

• Low-power communication

• Low-power embedded systems

Entrepreneurship

• Founder of 1 spin-off company

• Facilitator of 2 other spin-off companies

• Director of DASH7 Alliance

• Currently starting 2 new spin-off companies

Maarten Weyn

Prof @

University of Antwerp

iMinds

Belgium

maarten.weyn@uantwerpen.be

DASH7 Alliance Protocol 1.0: Low-Power, Mid-Range Sensor and Actuator Communication

M. Weyn, G. Ergeerts, R. Berkvens

University of Antwerp – iMinds

Belgium

maarten.weyn@uantwerpen.be

B. Wojciechowski

Wroclaw University of Technology

Poland

Y. Takabov

Wizzilab

France

IEEE CSCN 2015 - Tokyo

Origin

The Dash7 Alliance Protocol originates from ISO/IEC 18000-7,

The DASH7 Alliance (D7A) enhanced ISO 18000-7 for

Ultra Low Power, Mid-Range Wireless Sensor Communication.

The DASH7 Alliance expanded the air interface to all sub-GHZ ISM/SRD bands.

BLAST networking technology

Data transfer is abrupt and does not include content such as video, audio, or other isochronous forms of data

For most applications, packet sizes are limited to 256 bytes.

DASH7's main method of communication is by command-response, which by design requires no periodic network "hand-shaking" or synchronization between devices.

DASH7 does not use discovery beacons, end nodes can chose to respond only to pre-approved devices.

A DASH7 system of devices is inherently mobile or transitional.

BURSTY

LIGHT

ASYNC

STEALTH

TRANSITIONAL

DASH7 Topology

Asynchronous Communication

Roles

Authentication

Permissions

Data Elements

DASH7 Stack Configuration

Application Data

USE CASE

Collection of humidity sensor data

Traditional ApproachApplication periodically measures

humidity and sends data to the gateway.

Application implements communication

Application periodically measures humidity

and writes value to the file system

Data Elements can be accessed by DASH7

Data Elements

Application periodically measures humidity and writes value to the file system

Gateway queries data from Data Element

All Nodes matching query

answer with requested data

Queries

NotificationApplication periodically measures humidity and writes value to the file system

DASH7 detects change in Data Element

If criteria is matched, Sensor notifies requested data

Context Aware Sensor and Actuator Data Propagation

Write and read to/from files

Configure system through configuration files

Configured through file system

Handles scheduled scan cycles

Handles queries from other devices

Handles queries and notifications on file changes

File system configurable over the air

PHY: Modulation Schemes

Network Protocol

Transport Layer Segment

Use Cases: Range

100 5 km 50km30

Low-Range Long-Range

Mid-Range

Use Cases: Energy Consumption

720.231 0.306 4 63020.390 0.550

Energy (mJ)

LoRaWAN

Example Use Cases

Example Use Cases

Example Use CaseSimultaneous use of NFC Antenna: DASH7 and NFC

• Samsung S4• NFC Antenna attached to external NFC connection

pads• CC430 (wizzimote) with Open Source DASH7

stack (OSS-7)

• FTDI module to process communication with phone

• Diplexer to combine and shield NFC and 433 MHz DASH7 signal for simultaneous communication

City of Things Antwerp

integrating smart

city sensors

100 multi-technology

gateways

maarten.weyn@uantwerpen.be

+32 496 50 31 67

@maartenweyn