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Understanding Radio Irregularity in Wireless Networks

Understanding Radio Irregularity in Wireless Networks. Joint work with Patrick Stüdi, Fabian Kuhn and Gustavo Alonso. Content. Network Model Connectivity Edge Length Interference. Network Model Connectivity Edge Length Interference. Network Model (1).

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Understanding Radio Irregularity in Wireless Networks

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  1. Understanding Radio Irregularity in Wireless Networks Joint work with Patrick Stüdi, Fabian Kuhn and Gustavo Alonso

  2. Content • Network Model • Connectivity • Edge Length • Interference

  3. Network Model • Connectivity • Edge Length • Interference Network Model (1) Wireless network: network of computers (nodes) withouta fixed infrastructure, nodes communicate via wireless links

  4. Network Model • Connectivity • Edge Length • Interference Network Model (2)

  5. Log-normalshadowingradio propagationmodel • Network Model • Connectivity • Edge Length • Interference Network Model (3)

  6. Network Model • Connectivity • Edge Length • Interference Transmission Area - +

  7. [Bettstetter, Hartmann 05] [Stüdi, Chinellato, Alonso 05] • Network Model • Connectivity • Edge Length • Interference Connectivity & Node Degree

  8. Irregular radio propagation improves connectivity. Similar phenomena known from percolation theory 1 1 [Jonasson 01], [Roy, Tanemura 02] [Booth, Bruck, Cook, Franceschetti 03] • Network Model • Connectivity • Edge Length • Interference Adaptive Power Assignment

  9. [Trott 04] Edge length distributionEdge power distributionunder channel randomness • Network Model • Connectivity • Edge Length • Interference Distance Distribution

  10. Irregular radio propagation increases the average edge length. • Network Model • Connectivity • Edge Length • Interference Edge Length Distribution

  11. Log-normal shadowing reduces the number of interferers. Radio irregularity from log-normal shadowing is beneficial for both connectivity and interference. A comparable unit disk model is a worst case scenario for connectivity and interference. • Network Model • Connectivity • Edge Length • Interference Interference • Number of interferers: number of nodes that must not send concurrently to a given network link • Studied interference under log-normal shadowing and a power assignment that keeps the expected cumulated noise constant

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