Internet metering introduction
This presentation is the property of its rightful owner.
Sponsored Links
1 / 15

Internet Metering Introduction PowerPoint PPT Presentation


  • 96 Views
  • Uploaded on
  • Presentation posted in: General

Internet Metering Introduction. Internet. Contents: Introduction Hopes Facts Obstacles Solutions Summary Harold Hayes, Product Manager I+C Meters Landis+Gyr Africa. Introduction.

Download Presentation

Internet Metering Introduction

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Internet metering introduction

Internet MeteringIntroduction

Internet

Contents:

Introduction

Hopes

Facts

Obstacles

Solutions

Summary

Harold Hayes,

Product Manager

I+C Meters

Landis+Gyr Africa


Introduction

Introduction

  • The mobile communication and the Internet are technologies and markets, which are determined through a high dynamic. The assembling of the two subjects causes even higherexpectations. Not only new services and applications, but also complete new business areas will be developed over the next few years.

  • In the practise the fulfilment of the expectations has been seen as not unproblematic. The transmission in the wireless environment is determined through low bandwidth, higher delay times,fundamental smaller reliability and high securityneeds. According to the situation the technologies as TCP and Internet applications have to be adapted.


Hopes

Hopes

  • Standard Internet technology is available and can be used for metering

  • GPRS/Ethernet: Is always connected and the technology is cheap

  • GPRS/Ethernet: Reduced communication costs

  • Faster read out times

  • New applications


Facts

Facts

  • GPRS and Ethernet offers low-cost access to the Internet via TCP

  • Internet technologies are supported by the utility‘s IT-departments

  • PSTN modem banks are supported by the meter reading department

  • Existing infrastructure (Central station, LAN, meters etc.) can be upgraded to Internet Metering

  • Online monitoring

  • Ethernet replaces telephone lines in I+C buildings

  • Enabler as world wide energy data provider


Communication costs calculation example

Communication CostsCalculation example

Typical application:

  • Daily read-out time of 6 energy load profiles, TM=15min

    Typical system:

    Typical system parameters:

  • GSM read out time:72s (via dlms)

  • GPRS data size: 10kByte

GSM/GPRS

Network

Meter

Central station


Communication costs calculation example1

Communication CostsCalculation example

Tariffication model:

  • Provider, Vodacom SAhttp://www.vodacom.co.za

  • GSM: R0.99/min

  • GPRS: R0.02/10kByte

    Typical data size per day:

  • Data (HDLC) per day:6.2kByte

  • TCP overhead per day:2.8kByte

  • Heart beats (HDLC) for 5 hours:1.0kByte

  • Total:10kByte


Communication costs calculation example2

Communication CostsCalculation example

GPRS

  • Fix cost per year:12*R 1490/month talk 1000

  • Variable cost per year:R 73 =10kByte*R 0.02 /10kByte*365days/year

  • Cost saving per meter per year:R 360.62

GSM

  • Fix cost per year: = 12*R 1490/month talk 1000

  • Variable cost per year:R433 = 72s*R 0. 0165/Sec*365days/year

  • Communication cost = f (Tariffication model, Data size)

  • R 360.62 * 5000 meters R 1.8 million per year


Obstacles

Solution:Internet Meter Gateway

Solution set: Internet Meter Gateway, VPN, Data encryption

Obstacles

  • Addressing: The meter cannot be addressed from the Internet:Shortage of IP addresses, Security.

  • System integration: Existing data acquisition systems do not accept access from the internet: Security, Scheduler based processes.

  • Unauthorized meter access

  • Unauthorized changes to parametersor software in the meter

  • Virus attacks to meter

  • Data fraud

  • Technology Lifetime: Internet -> 3 years, Metering -> 15 years


Internet metering introduction

COM1

COM2

...

Internet

Gateway

The Internet Meter Gateway Solution1/2

= Replacing the modem bank

PSTN

Network

Virtual Comports

Central Station


The internet meter gateway solution 2 2

COM1

COM2

...

Internet

DMZ

Gateway

F i r e w a l l

F i r e w a l l

The Internet Meter Gateway Solution 2/2

= System Security

PSTN

Network

Central Station

  • Meter gate guard

    Internet Meter Gateway in combination with the communication unit controls and restricts the access to the meter


Internet metering introduction

4. Dial (ATDT...) via ComPort

5. Meter Connected to central

Dial Meter x

2. Dynamic IP Addressing

1. Login to Network

Internet

Meter x

3. Subscribeto iMEGA

How does the system work?

Central

GRPS

IP Address of iMEGA and Identifier

Intranet

Fix IP address connects central to iMEGA

Pre-Settings

Virtual Com Port connection

private

GSM-Network

(e.g. Swisscom)

Fix IP Address

Dynamic IP Addressing

Ethernet

Fix IP Address connects iMEGA to LAN/Internet

Internet Meter Gateway


System migration at central side

System migrationat central side

Migration cases:

  • Communication technology: GSM, PSTN  GPRS, Ethernet

  • Call process: central calls meter  meter calls central

  • Processing: sequential processing  parallel processing

    Implementation task:

  • Installation of virtual modems(Existing physical modems may remain)

  • Installation of an Internet Meter Gateway in DMZ

    Central station requirement

  • Support of high communication delay times

    At central station no conception change needed.


Data acquisition times sequential versus parallel

Mn+1

M1

M2

M3

M4

M5

M1

M2

M3

M4

M5

Mn

Data acquisition timesSequential versus parallel

  • Sequential data acquisition by using PSTN/GSM technology

  • Parallel data acquisition by using GPRS/Ethernet technology

Time saving compared to PSTN/GSM technology


Security at meter side data encryption

Internet

Market Participant

Signature Algorithm:

Elliptic Curve (ECDSA) ISO/IEC 5946-1/2/3, ISO/IEC 7816

Key Length:

192 Bit corresponding to RSA 1280 Bits

Security at meter sideData encryption

001011010001001001010010100101010010010100101010101010101010101010010101010101010100100101010101100101001010

001011010001001001010010100101010010010100101010101010101010101010010101010101010100100101010101100101001010

Metering Company

001011010001001001010010100101010010010100101010101010101010101010010101010101010100100101010101100101001010


Summary opportunities with internet metering

SummaryOpportunities with Internet Metering

  • A wireless connection (GPRS) or a connection via LAN (Ethernet Local Area Network) to the Internet is conveniently possible with TCP/IP.

  • Existing infrastructures such as central stations, LAN, meters, etc. can continue in use. The installation and maintenancecosts are reduced, however, since for example no further central station modems are required.

  • Parallel data acquisition results in shorter acquisition times.

  • With TCP/IP the meters can be permanently connected to the central station to permit continuous monitoring of the meters. Nevertheless the communicationcosts with GPRS are significantly lower than with normal GSM mobile communication.

  • Worldwide Internet access and lower communication costs (there are also no roaming costs for connections abroad) make newapplications possible, e.g. worldwide energy data providers.


  • Login