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Analysis of LTE for AMI Headend/DAP Interface

Analysis of LTE for AMI Headend/DAP Interface. Michael Souryal September 3, 2010. Assumptions. Topology UEs uniformly distributed in the sector 3 sectors per cell site Inter-sector interference neglected (for now) Traffic

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Analysis of LTE for AMI Headend/DAP Interface

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  1. Analysis of LTE for AMI Headend/DAP Interface Michael SouryalSeptember 3, 2010

  2. Assumptions Topology • UEs uniformly distributed in the sector • 3 sectors per cell site • Inter-sector interference neglected (for now) Traffic • No bundling of messages from DAP to Headend and vice versa: each message to/from a meter is sent individually over the LTE network. LTE Configuration • 5 MHz per uplink and downlink • SISO antennas • MCS selected adaptively to maximize throughput

  3. LTE Device Parameters Source: 3GPP TR 36.942 V8.2.0 *eNodeB antenna radiation pattern

  4. Propagation Model • Path loss (dB) with distance R (km): X represents lognormal shadowing with a standard deviation of 10 dB. • Path loss parameters: Source: 3GPP TR 36.942 V8.2.0

  5. Calculation of SNR • Received power (dBm) • Noise power spectral density (dBm/Hz) • Received SNR per subcarrier symbol (dB)

  6. Coverage Analysis • Maximum transmitter-receiver separation, Rmax • Maximum distance along antenna boresight at which MCS 0 can be supported with 10-3 BLER (neglecting shadowing) • Values of Rmax for 0 = 2.4 dB:

  7. Calculation of Sector Throughput Steps • Calculate the probability that MCS i will be used:(SNR varies with location in cell and shadowing.) • Let Si be the throughput of MCS i. • Then, the average (aggregate) throughput in the sector is: • Calculate sector throughput separately for the uplink and downlink.

  8. Sector Throughput Results Urban Area Rural Area Rmin = 0.2 km Rmin = 1 km

  9. Average Capacity per Smart Meter • Ratio of sector aggregate throughput to number of smart meters in sector:where  is the meter density (number of SMs per sq. km.) • Example meter densities

  10. Average Capacity per Smart Meter Urban Area Rural Area

  11. Required Throughput Assumptions • Required application throughputs based on 3 use cases: Service Switch (SS), Meter Reading (MR), and Plug in Hybrid Electric Vehicle (PHEV)1 • 42-byte overhead per message Required Throughputs • More than two orders of magnitude below average capacity at coverage limits 1 M. Souryal, C. Gentile, D. Griffith, D. Cypher and N. Golmie, “A Methodology to Evaluate Wireless Technologies for the Smart Grid,” to appear in Proc. IEEE SmartGridComm, Oct. 2010.

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