1 / 12

BUILDING CYBERINFRASTRUCTURE IN DEEP WOODS AND REMOTE WATERSHEDS

BUILDING CYBERINFRASTRUCTURE IN DEEP WOODS AND REMOTE WATERSHEDS. Gayatri Venkatesh, Kuang-Ching Wang Department of Electrical and Computer Engineering. To campus. Over Woods & Hills. In the Woods. In Woods & Ditches. Along the River. To campus. AT&T Data Coverage.

lelia
Download Presentation

BUILDING CYBERINFRASTRUCTURE IN DEEP WOODS AND REMOTE WATERSHEDS

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. BUILDING CYBERINFRASTRUCTURE IN DEEP WOODS AND REMOTE WATERSHEDS Gayatri Venkatesh, Kuang-Ching Wang Department of Electrical and Computer Engineering

  2. To campus Over Woods & Hills In the Woods In Woods & Ditches Along the River To campus AT&T Data Coverage The Intelligent RiverTM Pilot Sites

  3. Challenges and Objectives • Wireless networking challenges • Deep woods – impedes wireless communication range • Lack of cellular coverage • Hilly terrains – absolute blockage, often over long distances • Recurring cost and limited bandwidth of cellular/satellite service • Wireless networking objectives • A methodology for building wireless network infrastructure for current and future Intelligent RiverTM sites that • provides adequate and reliable bandwidth • scales to a large area physically and economically

  4. Our Unique Challenges and Strategies • Diverse sensing site characteristics • One-size-fits-all solution may not be optimal for monitoring the watersheds from sources to estuaries • Strategy: cost-performance trade-off among technologies • Pushing sensors “deeper” into the woods • Taming the forest rather than avoiding it • Strategy: assessing forest impact on wireless networks • Exploring network reliability and controllability • Accepting the fact: forest network condition changes over time • Strategy: identifying suitable control knobs to tune forest wireless networks

  5. Clemson Forest and Hunnicut Creek • Explore higher bandwidth, lower cost technologies • Clemson Forest • Long range Wi-Fi (fixed direction): IEEE 802.11a & b/g • Wi-Fi mesh network: IEEE 802.11b/g • Zigbee sensor network:IEEE 802.15.4 • Hunnicut Creek • Long range Wi-Fi (steerable direction): IEEE 802.11b/g • Wi-Fi mesh network: IEEE 802.11b/g • Zigbee sensor network: IEEE 802.15.4

  6. Forest and Hunnicut Network Overview

  7. Long Distance Transit Links • To overcome long distance, forests, hills • Radio placement on high structure on both ends • High gain directional antenna and power amplifiers • Potential control parameters • Radio transmit power • Antenna direction • Antenna gain • Radio layer 2 and 3 protocol parameters

  8. SensorCluster Zigbee Zigbee Zigbee Zigbee Data Zigbee Long range Transit Link Zigbee Zigbee Zigbee Clemson Forest Sensor Network • Short range Wireless Communication: • ISM 2.4 GHz operating frequency . • 1 mW (+0 dBm) power output. • Up to 120m range. • Supports up to 16 simultaneous channels.

  9. Steerable Directional Antenna Radio • Potentially higher bandwidth at substantially longer distance • Software controls radio to focus one direction at a time • Fidelity Comtech Phocus System (tested 15 miles line-of-sight range) • Potential use as 1) forest mesh routers and 2) long range gateways

  10. Measurement Studies of the Links • Long range links: throughput v.s. direction and power • Forest mesh links: throughput v.s. tree obstruction distance and power • Steerable antenna links: throughput v.s. antenna alignment and power • Study leveraged help from SC Governor School summer interns • Study results published at ACM Wintech 2008 poster session Long range link: Throughput v.s. signal strength v.s.antenna direction Long range link: Signal strength v.s.transmit power Forest mesh link: Throughput v.s. signal strength v.s.distance in forest Steerable link: Throughput v.s. signal strength v.s.antenna direction

  11. Future Work • Clemson Forest and Hunnicut networks ready for integration • Sensor packets pushed to server successfully (server integration TBD) • Video camera to be installed in Clemson forest • Mesh routers ready for larger scale deployment • Reliability and controllability are key concerns for a large scale sensing system • Further measurement studies to develop forest model for studying wireless network performance and design • Further studies on assessment and control techniques for wireless network performance and reliability • Further studies on developing large scale wireless network management techniques and software

  12. Acknowledgements • Dan Schmiedt , CCIT Chief Network Engineer • Knight Cox, Clemson Forest Manager • CCIT Intelligent River Project Team • Clemson Public Services Activities Team • Cisco Systems Inc.

More Related