Concept for tying the Consumer HAN and Utility HAN together as part of one homogeneous network. From etering America/World Meter Design Congress, Dallas, TX, April 2011

1. Zin Thein Kyaw
System
Energy Management Applications
Systems in the Home: Engineer
Gateway to the Texas
Customer HAN Instruments
USA

2. Agenda
• ZigBee Smart Energy for the HAN
• Overview of ZigBee Smart Energy
• Example SE HAN Network
• Utility HAN/Customer HAN
• Scenario from HAN SRS v2.0
• Example HAN with EMS
• “One HAN, One Radio”
• Implementation Considerations
• Looking Ahead

3. ZigBee Smart Energy for the HAN
• Energy management in the home is trending and
ZigBee SE is currently THE premier technology for
adoption
• Allows users to make real-time conscious
decisions about their energy usage, thus allowing
them to save money
• ZigBee SE HAN represents explosive growth
opportunities for wireless
• Demo showcases:
• Sensus Meter
• HAI In-premise display
• Z-Light
• Alektrona EMS with Google Power Meter support

4. Overview of ZigBee Smart Energy
• ZigBee Smart Energy is a ZigBee Alliance public
application profile that defines commands and
attributes for the following device types:
• Energy Service Portal (ESI) – The ESI is the device
that acts as a gateway into the home and manages the
ZigBee Smart Energy HAN
• In-Premise Display (IPD) – The IPD is a device that
presents energy consumption data and price information
to the end user either by text or graphical means
• Metering Device – These are typically metering
devices such as gas, water, and heat meters

5. Overview of ZigBee Smart Energy(cont.)
• Programmable Communicating Thermostat (PCT) –
Device used to control the cooling and heating systems of
the home
• Load Control Device – A device such as a pool pump or
water heater that is capable of receiving demand response
and load control events from the utility head end
• Smart Appliance – Like a load control device, a smart
appliance could be a washer, dryer, oven that is capable of
receiving demand response or pricing events from the
utility head end
• Range Extender – A range extender has no other purpose
than to be a router device for other devices in the HAN

6. Overview of ZigBee Smart Energy(cont.)
• A cluster is a ZigBee term for a collection of
commands and attributes specific to a particular
behavior
• In ZigBee Smart Energy, the following clusters
are supported:
• Price – Provides functionality to convey price
information from the utility head end
• Demand Response and Load Control (DRLC) -
Provides functionality for devices such as thermostats
and other devices that perform load control
• Simple Metering - Provides functionality to retrieve
usage data from electric, gas, water metering devices

7. Overview of ZigBee Smart Energy(cont.)
• Message – Provides functionality to deliver text messages
• Time – Provides functionality to synchronize time between
the time server (ESP) and other devices. UTC is used as the
common time base
• Key Establishment – Provides functionality for
establishing a link key for secure application level
communication between pairs of devices

8. Example SE HAN Network
In Premise Display shows consumption, price
• All communication with the
signals and text messages from ESI
ESI is secured at the
application layer with the
In-Premise Display (IPD)
ESI Sends PCT Load Control Event to control HVAC link key established via
Certificate Based Key
Programmable
Communicating
Thermostat (PCT)
Establishment (CBKE)
• AES-128 block cipher is
used to encrypt packets,
Smart Appliances shows price, text
messages from ESI
the key is the established
ESI (E-Meter) Smart Appliance
link key
Simple Metering Device Reports Current
Summation Delivered Attribute Periodically
Simple Metering Device
(Gas, Water, Heat)

9. Utility HAN/Customer HAN
• The concept of “Utility HAN” and
“Customer HAN” refers to the following:
• Utility HAN represents devices that are owned
by the utility
• Customer HAN represents devices that are
owned by the consumer
• Logically thought of as “separate”, but
physically on the same network
• Example scenario from the HAN SRS v2.0
document

10. Scenario from HAN SRS v2.0
Customer
Utility HAN HAN

11. Example HAN with EMS
InPremise Display shows consumption,price
signals andtext messages fromESI
In-Premise Display (IPD)
Lighting Control
Z-Light (LED Light)
EMS retrievesmeter data
Energy Mangement System (EMS)
ESI (E-Meter)

12. “One HAN, One Radio”
• The EMS in the example HAN controls both
ZigBee HA (Home Automation) and SE
devices
• In a lot of typical system implementations,
you’ll find that there are two ZigBee
radios, one to manage the HA devices,
and one to manage the SE devices
• But wait, it is possible to implement this
system with just one radio!

13. “One HAN, One Radio” (cont.)
• It is possible due to the multi-tasking
architecture of TI’s Z-StackTM
• Powered by HAuSETM multi-profile support,
each profile runs as a separate task,
making it possible to load multiple
“application device objects” in one physical
device
• Applications can communicate with each
other using inter-task messaging
• A simplified example is shown next

14. “One HAN, One Radio” (cont.)
HA Switch
SE IPD
In Premise Display Queries For Latest Pricing Info,
and displays MESSAGE command from ESI
HA Lamp
Performs Key Establishment Only
SE Range
Extender
HA
ESI SE
Collect Simple Metering Data
"Energy Management System/Gateway"
Legend
SE communication path
HA communication path

15. Implementation Considerations
• Security
• The EMS is considered to be a trusted partner
of the utility ESI/smart meter
• Any metering, pricing or load curtailing events
use the highest level of SE security
• The EMS can communicate with other home
automation devices using a lower level of
security since most of the communication is
command and control using the HA profile

16. Implementation Considerations (cont.)
• Commissioning
• Utilities are starting to accept the idea of
having HA devices on the same network as the
SE HAN. Assumption is that the EMS is
responsible for managing the customer HAN
devices
• HA devices go through the same secure
commissioning procedure as any other SE
device
• The ZigBee Alliance is currently looking at what
it would take to have future revisions of the
ZigBee SE 1.x and HA specifications officially
support this model

17. Looking Ahead
• Integration of the utility
and customer HAN
devices will enable a
richer set of
applications in the
home
• Genesis of the next
wave of “consumer
products”
• Enable service
providers to
differentiate themselves
by enabling varied
service models

18. References
• ZigBee Smart Energy Profile Specification,
075356r15ZB_AMI_PTG-AMI_Profile
Specification.pdf, ZigBee Alliance
• ZigBee Specification, 053474r17ZB_TSC-ZigBee-
Specification.pdf, ZigBee Alliance
• Z-Stack Smart Energy Developer’s Guide,
SWRA216, Texas Instruments
• HAN Use Case – General Definitions, Assumption,
Actors.doc, SDG&E, SCE, PG&E
• UCAIug HAN SRS – v2.0.pdf, UCAIug – OpenSG -
OpenHAN Task Force

19. “May the HAN be with you”