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Project 3.1
Connectivity and Coexistence
Prof. David G. Michelson (University Of British Columbia)
Sina Mashayekhi (PhD student)
Presented by:
Sina Mashayekhi
www.smart-microgrid.ca
Introduction
• As we transition from traditional Grid to Smart Grid and on to
Smart Microgrids, our dependence on high performance and
reliable wireless communication increases.
– Connectivity and Coexistence can not be taken for granted.
– We must re-examine the assumptions upon which both
government policy and industry practice are based.
• The variety of scenarios encountered in SG and SMG
propagation environments
– Increases the risk of under/over design
– Risks the proper functionality of the network
– Increases the risk of unexpected or unwarranted expenses
• Our goal is to reduce the risk of poor design by developing
models that capture our knowledge and understanding of
propagation impairments in a form useful in simulation and
design.
Selected Project Highlight: SRSP 301.7 Revision
• Are technical requirements for terminal station fixed P2MP radio
systems used for the management of the electricity supply in
Canada too restrictive?
– Minimum gain of 12 dBi, maximum 3dB beam width of 30o
• Key considerations:
– NLOS multipath propagation environment
– Relatively low capacity systems
– Omnidirectional or Directional terminal antennas?
• Impacts of Using Omni for P2MP deployments:
– Co-channel Interference, Coverage, ASE
– Second best server redundancy
– Cost of installation and maintenance
• More details in our poster
Selected Project Highlight: Link Budget Problem on
Relay Nodes - Shadow Fading Characterization
• Shadow fading on Relay Nodes at 1.8GHz Macrocell environment
Demonstration that shadow fading at pole-top relay nodes is
worse than previously realized and must be accounted for in
design.
• Effect on network coverage.
• Shadow fading at higher frequencies for advanced networks.
Selected Project Highlight: Characterizing
Coexistence Between Radios at Relay Nodes
• The objective is to devise and execute a test methodology to recognize
the source of interference and a new method to investigate potential
coexistence issues between the collocated 915 MHz SMI, 1.9 GHz 3G
and 1.8 GHz WiMAX transceivers.
• Applicable to both SmartGrid and Smart Microgrid networks
Summary
• Other projects in-progress :
– Noise Characterization in substation environment (BC Hydro)
– Characterization of Medium Voltage underground power lines for
communication (BC Hydro / Corinex)
• Goals
– Lower design risks and more cost-effective deployments
– Better government policy
– Competitive advantage for our industry partners