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Internet Metering Introduction

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

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Internet Metering Introduction

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

  2. 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.

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. COM1 COM2 ... Internet Gateway The Internet Meter Gateway Solution 1/2 = Replacing the modem bank PSTN Network Virtual Comports Central Station

  10. 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

  11. 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

  12. 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.

  13. 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

  14. 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

  15. 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.

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