KNX – ZigBee Gateway
for Home Automation
Tsai , Yu-Ming
Adviser：Tsai, Lian-jou
Oct. 20 2010
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Outline
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Abstract
Introduction
Research Background
KNX–ZigBee Gateway
a. Attribute translation
b. Application service translation
c. Address translation
• Result
• Conclusion
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Abstract
• Among the many wireless technologies,
ZigBee is one of the most useful for home
automation.
• KNX is a mature protocol for wired media
that is recognized as an international
standard.
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Abstract
• ZigBee is not supported with conventional
home networking systems which based on
wired media.
• This paper proposes a KNX–ZigBee
gateway to interface between KNX and
ZigBee systems for wired and wireless
home automation systems.
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Introduction-KNX
• KNX is an international standard communication
protocol for home automation.
• KNX is based on standard protocols for the EIB
(European Installation Bus), BatiBus, and the EHS
(European Home System).
• KNX supports several communication media,
including twisted pair, power line, radiofrequency, and Ethernet.
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Introduction-KNX
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Introduction-KNX
• In KNX addressing system , every bus is
identified by both a physical and a group
address.
• The same length of user data carried in a KNX
telegram can be utilized in DPT (Datapoint
Type) for effective use of the bandwidth of
the medium.
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Introduction- ZigBee
• ZigBee is a low-rate, low-power, low-cost
wireless networking protocol that is targeted
toward automation and remote control
applications and is designed to provide
connectivity for equipment.
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Introduction- ZigBee
• ZigBee defines three categories of devices
according to their roles in the network:
coordinator, router, and end devices.
• In the current version of the HA profile, there
are 31 device definitions for general devices,
lighting devices, closure devices, HVAC
devices, and intruder alarm system devices
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Introduction- ZigBee
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Research Background
• The adoption of ZigBee as a network-layer
protocol and KNX as an application-layer
protocol.
• The network layer of ZigBee provides
advanced technologies such as routing and
security, and the application layer of KNX
defines application-level functions and
services for HA.
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Research Background
• The application,
transport, and network
layers of KNX are
implemented on top of
the ZigBee protocol
stack, and an interface
layer enables
interactions between
the two protocols.
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Research Background
• KNX over ZigBee wireless nodes are also able
to communicate with existing KNX devices.
by using ZigBee as a new data-link.
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Research Background
• However, This approach is limited in that KNX
over ZigBee nodes cannot communicate with
pure ZigBee nodes.
• We propose the KNX–ZigBee gateway
method to leverage the beneficial
characteristics of both networks.
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KNX–ZigBee Gateway
• KNX–ZigBee gateway as an interface between
the two networks with which to translate
entities from one network to the other.
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KNX–ZigBee Gateway
• KNX–ZigBee gateway must handle entities such
as the value of user data, application-level
services, and the addresses of devices of both
networks, three functions are supported:
1.translation of attributes of user data
2.translation of application level services
3.translation of addresses
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Attributes Translation
• The DPTs defined by the KNX system enable
the user to encode the usage of the data
efficiently.
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Attributes Translation
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Attributes Translation
• The HA profile defined by the ZigBee system
comprises Device, Cluster, Command,
Attribute, and Attribute data.
• An ‘On/Off Switch’ device has five categories
of Clusters: On/Off, Scenes, Groups, Identify,
and On/Off Switch Configuration, each with
its own attributes.
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Attributes Translation
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Attributes Translation
• The logical access point for device communication is
the endpoint in ZigBee and the communication object
in KNX. An endpoint is mapped to a Device in a HA
profile, and a communication object is mapped to a
DPT.
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Attributes Translation
• The DPT information is managed by a
commissioning tool called ETS. Given both the
incoming telegram and the DPT information,
the KNX–ZigBee gateway can discern the
intended use of the telegram.
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Attributes Translation
• The information from the KNX network has
to be translated appropriately to the ZigBee
application layer and APS sub-layer data
structures.
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Attributes Translation
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Attributes Translation
• The Profile Identifier, Cluster Identifier,
Attribute ID, Data Type, and Attribute data
fields will be filled when we translate the
example telegram from the KNX network.
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Application Services Translation
• KNX system has three kinds of representative
services that are provided during normal
operations. These are A_GroupValue_Read,
A_Group Value_Response, and
A_GroupValue_Write.
• The information regarding which service is being
used is kept on the telegram as APCI (Application
Protocol Control Information).
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Application Services Translation
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Addresses Translation
• KNX uses 16-bit physical addresses and 16-bit
group addresses.
• ZigBee uses three kinds of addresses:
64-bit IEEE extended addresses
16-bit network addresses
16-bit group addresses
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Addresses Translation
• Destination endpoints are maintained
separately in a group table associating groups
with endpoints.
• Group-addressed frames can be delivered
selectively to those endpoints.
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Addresses Translation
• By using group addresses, one message can
control several devices, just as in a KNX
system.
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Result
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Result
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Result
• The ZigBee frame format for the APS sublayer given is filled out to correspond with
the example incoming KNX telegram.
• Translation from a ZigBee frame to a KNX
telegram can be performed by the reverse of
the given procedure.
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Conclusion
• In this paper, we proposed a KNX–ZigBee
gateway to interface between KNX and
ZigBee systems and enable integration of
wireless and wired home automation
systems.
• For the broadcast communications mode is
used. The ZigBee standard use applying
schemes, such as multicast communications,
to achieve energy efficiency.
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Conclusion
• Some attributes and application-level
services cannot be translated. the definitions
may not be interchangeable between the
systems.
• The structure of the KNX-ZigBee gateway
makes it appear complex to implement.
Some systematic ideas or schemes that make
its structure as simple as possible.
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Future Work
• we plan to implement the KNX–ZigBee gateway and
use it to establish a home lighting control system. This
model will include direct lighting, indirect lighting, and
artificial lighting devices, as well as ZigBee sensor and
actuator nodes.
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References
[1] Christian Reinisch, “Wireles communication in
home and building automation,” Master’s thesis,
Vienna University of Technology February 2007.
[2] Christian Reinisch, Wolfgang Kastner, Georg
Neugschwandtner, Wolfgang Granzer, “Wireless
technologies in home and building automation,”
INDIN 2007, Volume 1, PP. 93–98, 23–27 June
2007.
[3] ZigBee Alliance home page,
http://www.zigbee.org/en/about/
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References
[4] KNX Specification, “03_07_02 Datapoint Types
v1.4 AS v20071214a. doc v1.4,” December 14,
2007.
[5] Sinem Coleri Ergen, “ZigBee/IEEE 802.15.4
summary,”U.C. Berkeley, September 10, 2004.
[6] ZigBee Specification, “ZigBee home automation
public application profile,” v1.0 revision 25, ZigBee
document 053520r25, ZigBee Standard
Organization, October 25, 2007.
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References
[7] ZigBee Specification, “ZigBee cluster library
specification,” ZigBee document 075123r01ZB,
ZigBee Standard Organization, October 19, 2007.
[8] ZigBee Specification, “ZigBee specification,”
ZigBee document 053474r17, ZigBee Standard
Organization,January 17, 2008.
[9] KNX Specification, “03_03_07 layer application
v1.0 AS,” December 19, 2001.
[10] KNX Specification, “07_20 (S12) lighting v1.7
AS,”March 25, 2002
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Origin
4th IEEE Conference on Automation
Science and Engineering
Key Bridge Marriott, Washington DC, USA
August 23-26, 2008
ppt Author : Tsai, Yu-Ming
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Thank You Very Much
&
Welcome to advise
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