HotSel: A Hot Spot Selection Algorithm for Internet Access in Rural Areas through Nanosatellite Networks

Nowadays, to benefit from Internet access is so easy in some areas of the world as difficult in others. There are some different projects whose purpose is to extend Internet access to areas which do not have it yet. Each of these projects has unique characteristics that distinguish it from others (different transmission channels, different devices used, \dots). One possible solution provides the use of a particular type of satellites called nanosatellites. Using these devices, we can have a solution to extend the network access in rural and remote areas which offers a good balance among performances, security and costs. In a network of this type ground stations (called hot spots) are deployed, which upload data destined to rural areas on nanosatellites and download data destined to Internet servers from nanosatellites. During a data connection, an Internet server that wants to reply to a request coming from a rural area has many hot spot alternatives to whom it can deliver data. The problem of choosing the ``optimal'' hot spot becomes important because a wrong choice could lead to a high delivery delay. We propose ``HotSel'': a hot spot selection algorithm able to minimize data delivery time. HotSel is simple and practical, and outperforms two other selection mechanisms used as comparison. All results have been collected by using Network Simulator 3 (NS3) and developing a module able to simulate a nanosatellite network.