Araújo, FilipeRodrigues, Luís2009-02-102014-11-142009-02-102014-11-142003-12http://hdl.handle.net/10451/14243http://repositorio.ul.pt/handle/10455/2944This paper presents a novel peer-to-peer system that is particularly well suited to support context-aware computing. The system, called GeoPeer, combines the advantages of general purpose peer-to-peer systems with the suitability of geographical routing for supporting location-constrained queries and information dissemination. To achieve this goal, GeoPeer incorporates sophisticated mechanisms to establish long-range contacts that permit to achieve a small network diameter. These mechanisms take explicitly into account the unbalanced distribution of nodes in the geographical spaceporreport