Pejovic, VJohnson, DLZheleva, MBelding, EMLysko, Albert A2014-05-162014-05-162014-01Pejovic, V. et al. 2014. VillageLink: Wide-Area Wireless Coverage. In: 6th International Conference on Communications Systems and Networks (COMSNETS 2014), Bangalore, India, 7-10 January 2014http://hdl.handle.net/10204/74046th International Conference on Communications Systems and Networks (COMSNETS 2014), Bangalore, India, 7-10 January 2014White spaces promise to revolutionize the way wireless connectivity is delivered over wide areas. However, large-scale white space networks face the problem of allocating channels to multiple contending users in the wide white space band. To tackle the issue, we first examine wireless propagation in a long-distance outdoor white space testbed and find that a complex combination of free-space loss and antenna effects impacts transmission in white spaces. Thus, a need arises for a strategy that goes beyond simple channel utilization balancing, and uses frequency probing to profile channels according to their propagation properties. We devise VillageLink, a Gibbs sampling-based method that optimizes channel allocation in a distributed manner with a minimum number of channel switching events. Through extensive simulations we demonstrate that VillageLink results in a significant capacity improvement over alternative solutions.enWireless communicationChannel allocationAntennasOutdoor testbedsWhite spacesConference PresentationPejovic, V., Johnson, D., Zheleva, M., Belding, E., & Lysko, A. A. (2014). VillageLink: Wide-Area Wireless Coverage. http://hdl.handle.net/10204/7404Pejovic, V, DL Johnson, M Zheleva, EM Belding, and Albert A Lysko. "VillageLink: Wide-Area Wireless Coverage." (2014): http://hdl.handle.net/10204/7404Pejovic V, Johnson D, Zheleva M, Belding E, Lysko AA, VillageLink: Wide-Area Wireless Coverage; 2014. http://hdl.handle.net/10204/7404 .TY - Conference Presentation AU - Pejovic, V AU - Johnson, DL AU - Zheleva, M AU - Belding, EM AU - Lysko, Albert A AB - White spaces promise to revolutionize the way wireless connectivity is delivered over wide areas. However, large-scale white space networks face the problem of allocating channels to multiple contending users in the wide white space band. To tackle the issue, we first examine wireless propagation in a long-distance outdoor white space testbed and find that a complex combination of free-space loss and antenna effects impacts transmission in white spaces. Thus, a need arises for a strategy that goes beyond simple channel utilization balancing, and uses frequency probing to profile channels according to their propagation properties. We devise VillageLink, a Gibbs sampling-based method that optimizes channel allocation in a distributed manner with a minimum number of channel switching events. Through extensive simulations we demonstrate that VillageLink results in a significant capacity improvement over alternative solutions. DA - 2014-01 DB - ResearchSpace DP - CSIR KW - Wireless communication KW - Channel allocation KW - Antennas KW - Outdoor testbeds KW - White spaces LK - https://researchspace.csir.co.za PY - 2014 T1 - VillageLink: Wide-Area Wireless Coverage TI - VillageLink: Wide-Area Wireless Coverage UR - http://hdl.handle.net/10204/7404 ER -