AMI Network (AMI Head-End to/from Smart Meter) Network_ph2add.pdfSmart Meter. It is intended to be...

American Electric Power 4.5 Advanced Metering Infrastructure

Document ID: Use case #

5.1

Title: AMI Network (AMI Head-End to/from Smart)

Subject Matter Expert: Author: Reviewed by: Robert Sarfi Brian D. Green John Simmins

Copyright © 2011 American Electric Power Company

AMI Network (AMI Head-End to/from Smart Meter)

Version History Rev. Date Author Change description 1.6 4-6-2010 Brian D. Green Clean-Up 2.0 4-10-2010 John Simmins Fill in blanks and narrative and description 3.3 4-22-2010 Brian D. Green Add AEP comments and diagrams

"Acknowledgment: This material is based upon work supported by the Department of Energy under Award Number DE-OE0000193."

Disclaimer: "This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information,

apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or

service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily

state or reflect those of the United States Government or any agency thereof."



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of 12 Copyright © 2011 American Electric Power Company Rev. 4

Summary:

Advanced Metering Infrastructure (AMI) is a transforming technology that has broad impact on the energy market and its consumers. AMI allows utilities to balance supply, demand, and capacity making a smarter, more efficient, grid by pushing aspects of grid monitoring and control out to the endpoints of delivery. Stakeholders are implementing the systems and technologies required to deploy AMI today.

Advanced Metering Infrastructure (AMI) is a two-way communication system that can reach every device in the distribution space. The industry focus in embracing AMI as opposed to Automatic Meter Reading (AMR) is that the communication system is not dedicated to a single application. Instead, AMI is a flexible, general-purpose communication system that can be used for many applications – including meter reading, distribution automation, connect/disconnect, and others.

AMI systems promise to provide advanced energy monitoring and recording, sophisticated tariff/rate program data collection, and load management command and control capabilities. Additionally, these powerful mechanisms will enable consumers to better manage their energy usage, and allowing the grid to be run more efficiently from both a cost and energy delivery perspective. These advanced capabilities will also allow utilities to provision and configure the advanced meters in the field, offering new rate programs, and energy monitoring and control.

Narrative:

This Use Case handles the transfer of any data element from the AMI Head-End to the Smart Meter. It is intended to be an intermediary Use Case, called and reused by many other Use Cases, The Use Case provides for scenarios such as meter to meter, relay to meter, and relay to relay to meter communications paths. It hides the complexity of the Access Point sending messages directly to a Smart Meter NIC and to a Smart Meter through a combination of Relays and Smart Meters.



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Interface Diagram:

AMI-Head End

Smart Meter

Operations

Customer

3

39

AMI Head-End

Smart Meter

Operations

Customer

Distribution

DR Application 1

Access Point

Relay Relay

Smart Meter Smart Meter

53

5454

55

52

50

51

NIC NIC NIC

565656

Smart Meter

NIC

56

55

5454

Note(s):

The NIC is part of the Smart Meter.

The interface between the AMI Head-End and the Access Point includes: LAN, Firewall/DMZ, Backhaul Router, Backhaul Network, Backhaul Gateway.

Message relaying / routing may occur amongst various combinations of Access Point, Relays and NICs.



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Actor(s):

The list of the actors and the roles that are participating in this use case described in the table below.

Name Role description

Access Point The Access Point is a sub-system within the AMI system that performs high volume data collection/aggregation and transport capabilities.

AMI Head-End The AMI Head-End is the back office system than controls the Advanced Metering Infrastructure.

Backhaul Gateway The communication device between the Access Point and the Backhaul Network

Backhaul Network The high capacity line from a wireless mesh network to the LAN. The backhaul side of the device relays the traffic from router to router wireless until it reaches a gateway that connects to the Internet or other private network via a wired or wireless connection.

Backhaul Router The access point in the mesh router communicates with the mobile users in the area.

Firewall/DMZ A piece of computer software or hardware intended to prevent unauthorized access to system software or data

NIC AMI side of the network interface card within the Smart Meter.

Relay A sub-system of the AMI system that typically relays/routes the data using radio signals between the meters and the access points.

Participating Business Functions:

The participating business function, its acronym and what they provide in this use case are detailed in the table below.

Acronym Business Function/Abstract Component Services or Information Provided

Assumptions / Design Considerations:

• Standard International Electrotechnical Commission (IEC) 61968 Message Definition format will be followed to provide the Header, Request, Reply, and payload used when defining the messages for the design specifications. For the purpose of the use cases identified in this document these have been omitted as they are to be provided in the design specification for the AMI Network use case.



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Normal Sequence:

The sequences of events, showing the order in which they ocurr during the typical progression of this use case are provided in the table below. The Sequence Diagram that graphically depicts the events is presented immediately following the table.

S1: AMI Head-End to Smart Meter.

Use Case Step

Triggering Event

Description Of Process Information To Be Exchanged

Producer Receiver Message Type or Additional

Notes

1.1 Data needs to be sent from AMI Head-End to Smart Meter

AMI Head-End sends Data Elements to the LAN

Data Elements that need to be sent to the Smart Meter

AMI Head-End

LAN

1.2 LAN sends Data Elements to the Firewall/DMZ

Data Elements that need to be sent to the Smart Meter

LAN Firewall/DMZ

1.3 Firewall/DMZ sends Data Elements to the Backhaul Router

Data elements that need to be sent to the Smart Meter

Firewall/DMZ

Backhaul Router

1.4 Backhaul Router sends Data Elements to the Backhaul Network


Backhaul Router

Backhaul Network

1.5 Backhaul Network sends Data Elements to the Backhaul Gateway


Backhaul Network

Backhaul Gateway

1.6 Backhaul Gateway sends Data Elements to the Access Point


Backhaul Gateway

Access Point

1.7A.1

Access Point sends Data Elements to NIC


Access Point

NIC

1.7B.1

Access Point sends Data Elements to Relay


Access Point

Relay



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Use Case Step

Triggering Event



Notes

1.7B.2

Relay sends Data Elements to Relay


Relay Relay As needed

1.7B.3

Relay sends Data Elements to NIC


Relay NIC

1.7C.1

Access Point sends Data Elements to NIC


Access Point

NIC As needed

1.7.C.2

NIC sends Data Elements to NIC


NIC NIC



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AMI Network Scenario 1 Sequence Diagram



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S2: Smart Meter to AMI Head-End.

Use Case Step

Triggering Event



Notes

2.1A.1

Elements of AMI System deliver data elements that need to be sent to the AMI Head-End

NIC sends Data Elements to the Access Point

Data Elements that need to be sent to the AMI Head

NIC Access Point

2.1B.1

NIC sends Data Elements to the NIC


NIC NIC As necessary

2.1B.2

NIC sends Data Elements to the Relay


NIC Relay As necessary

2.1B.3

Relay sends Data Elements to the Access Point


Relay Access Point

2.1C.1

NIC sends Data Elements to the Relay


NIC Relay

2.1`C.2

Relay sends Data Elements to another Relay


Relay Relay As necessary

2.1C.3

Relay sends Data Elements to the Access Point


Relay Access Point

2.2 Access Point sends Data Elements to the Backhaul Gateway


Access Point

Backhaul Gateway

2.3 Backhaul Gateway sends Data Elements to the Backhaul Network


Backhaul Gateway

Backhaul Network



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Use Case Step

Triggering Event



Notes

2.4 Backhaul Network sends Data Elements to the Backhaul Router


Backhaul Network

Backhaul Router

2.5 Backhaul Router sends Data Elements to the Firewall/DMZ

Data Elements that need to be sent to the AMI Head-End

Backhaul Router

Firewall/DMZ

2.6 Firewall/DMZ sends Data Elements to the LAN


Firewall/DMZ

LAN

2.7 LAN sends Data Elements to the AMI Head-End


LAN AMI Head-End



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AMI Network Scenario 2 Sequence Diagram



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Integration Scenarios

Adapters will use the Common Information Model (CIM) in Extensible Markup Language (XML) to send and receive messages and events.

The following are the points of integration that must be tested for this use case. Other non-CIM message interfaces may be testable in this use case.

Actor Interface Points

Access Point • Relay AMI Head-End • LAN Backhaul Gateway • Access Point Backhaul Network • Backhaul Gateway Backhaul Router • Backhaul Network Firewall/DMZ • Backhaul Router LAN • Firewall/DMZ Relay • NIC

Pre-conditions:

The following conditions that MUST be met before this use case can occur.

• All elements of the AMI Network are proprietary in nature and are part of a whole; thus cannot work in isolation of each other.

• Telecomm links are required between AMI Network elements and these links are implemented differently depending on geography, availability, coverage and throughput (private, public, land-line, wireless).

Post-conditions: None

The following events or actions that may happen after or be caused by the completion of the normal use case events, as well as the exceptions or alternative sequences are:



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Exceptions / Alternate Sequences:

There are no exceptions, unusual events or alternate sequences defined for this use case.

Use Case Step

Triggering Event


Producer Receiver Message Type

Message Type(s) Diagram:

An XML Schema Definition (XSD) diagram shows the normative and informative parts of the message. Not all of the International Electrotechnical Commission’s (IEC) – CIM message optional elements must or will be used in the use of IEC – CIM for this specific use case.

References:

Use Cases or other documentation referenced by this use case include:.

Issues: None

ID Description Status

Miscellaneous Notes: None

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