Tech pages/SensorNetworks - XMPP WIKI
Tech pages/SensorNetworks
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Contents
Overview
Base Specifications
Enhancing Specifications
Interoperability Specification
Supporting Specifications
Implementations
6.1
Servers
6.2
Clients
6.3
Libraries
Discussion Venues
Overview
Abstract interface description, describing available sensor resources (readable/writable values, data types, meta information, etc.)
Request/response mechanism for readout.
Request/response mechanism for output.
Spontaneous reporting of momentary values based on subscription rules, hysteresis levels, and/or other logic.
Node topology information (if sensor part of larger whole, like a concentrator, for instance).
Abstract metering data description, including:
o Timestamps
o Description
o Units (if numerical)
o Precision (if numerical)
o Statuses (sequence of flags: error, QoS, tampering, etc.)
o Data types (numerical, Boolean, string, date & time, enum, time span)
o Value Types (momentary values, historical values, status values, informative values, etc.)
o Localization information
Base Specifications
To create this interoperable sensor network usage of XMPP a set of xep extensions has been created. The core is 4 xeps that together describes more or less any sensor actuator network.
sensor-data
Provides the underlying architecture, basic operations and
data structures for sensor data communication over XMPP networks.
It includes a hardware abstraction model, removing any technical
detail implemented in underlying technologies.
This XEP is used by all other sensor network XEPs.
xep-0000-SN-Control
Defines how to control actuators and other devices in
sensor networks.
xep-0000-SN-Concentrators
Defines how to handle architectures containing concentrators
or servers handling multiple sensors.
sensor-network-provisioning
This specification. Defines how provisioning, the management of
access privileges, etc., can be efficiently and easily
implemented.
Enhancing Specifications
To
xep-0000-SN-Discovery
Defines the peculiars of sensor discovery in sensor networks.
Apart from discovering sensors by JID, it also defines how to
discover sensors based on location, etc.
xep-0000-SN-Events
Defines how sensors send events, how event subscription,
hysteresis levels, etc., are configured.
xep-0000-SN-Multicast
Defines how sensor data can be multicast in efficient ways.
xep-0000-SN-PubSub
Defines how efficient publication of sensor data can be made
in sensor networks.
xep-0000-SN-BatteryPoweredSensors
Defines how to handle the peculiars related to battery powered
devices, and other devices intermittently available on the network.
Interoperability Specification
In all networks that combines information from different systems over business and technology borders the crucial thing is to get interoperability. And there is no other way to do this than creating specifications that adds the "common good practices" to make things speak the same language. The interoperability spec will be a moving target with constant elaboration to enable true interoperability between systems
xep-0000-SN-Interoperability
Defines guidelines for how to achieve interoperability in
sensor networks, publishing interoperability interfaces for
different types of devices.
Supporting Specifications
XEP-0000-ColorParameter
Defines extensions for how color parameters can be handled, based on Data Forms [1]
XEP-0000-DynamicForms
Defines extensions for how dynamic forms can be created, based on Data Forms [2],
Data Forms Validation [3],
Publishing Stream Initiation Requests [4]
and Data Forms Layout [5].
XEP-0000-Exi
Defines how to EXI can be used in XMPP to achieve efficient
compression of data. Albeit not a sensor network specific XEP,
this XEP should be considered in all sensor network
implementations where memory and packet size is an issue.
Implementations
Servers
Clients
Libraries
Discussion Venues
Main author
Email: peter.waher@clayster.com
JabberID: peter.waher@jabber.org
URI:
Co working and Managed by
Email: joachim.lindborg@sust.se
URI:
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